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Protection components
Current and voltage measurement relays : Zelio Control measurement and control relays
pages 28471/2 to 28472/7
3-phase supply control relays :
pages 28473/2 to 28473/7 General characteristics
Single-phase supply control relays :
pages 28474/2 to 28474/5
Liquid level control relays :
pages 28475/2 to 28475/5
Environment
Conforming to standards IEC 60255-6, EN 60255-6
Product approvals CSA, GL, UL, pending
Ł marking Zelio Control measurement relays conform to European
regulations relating to Ł marking
Ambient air temperature Storage �C - 40& + 85
around the device
Operation �C - 20& + 65
Permissible relative humidity range Conforming to IEC 60721-3-3 15& 85 % Environmental class 3K3
Vibration resistance Conforming to IEC 6068-2-6, 10 to 55 Hz a = 0.35 ms
Shock resistance Conforming to IEC 6068-2-27 15 gn - 11 ms
Degree of protection Casing IP 50
Terminals IP 20
Degree of pollution Conforming to IEC 60664-1 3
Overvoltage category Conforming to IEC 60664-1 III
Rated insulation voltage Conforming to IEC V 500
Conforming to CSA V (1)
Test voltage for Dielectric test kV 2.5
insulation tests
Shock wave kV 4.8
Voltage limits Power supply circuit 0.85& 1.1 Uc (2)
Frequency limits Power supply circuit 50/60 ą 5 %
Disconnection value Power supply circuit > 0.1 Uc (2)
Mounting position In relation to normal vertical Any position
without derating mounting plane
Connection Flexible cable without cable end mm2 2 x 2.5
Maximum c.s.a.
Flexible cable with cable end mm2 2 x 1.5
Tightening torque N.m 0.6& 1.1
Immunity to electromagnetic interference (EMC) (Application class 2 conforming to EN 61812-1)
Electrostatic discharge Conforming to IEC 61000-4-2 Level 3 (6 kV contact, 8 kV air)
Electromagnetic fields Conforming to IEC 61000-4-3 Level 3 (10 V/m)
Fast transients Conforming to IEC 61000-4-4 Level 3 (2 kV)
Shock waves Conforming to IEC 61000-4-5 Level 3 (2 kV)
Radiated and CISPR11 Group 1 class A
conducted emissions
CISPR22 Class A
(1) Value not communicated.
(2) Except RM4-T, see page 28473/5.
28470/2
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Protection components
Current and voltage measurement relays :
Zelio Control measurement and control relays
pages 28471/2 to 28472/7
3-phase supply control relays :
pages 28473/2 to 28473/7
General characteristics (continued)
Single-phase supply control relays :
pages 28474/2 to 28474/5
Liquid level control relays :
pages 28475/2 to 28475/5
Output circuit characteristics
Mechanical durability In millions of operating cycles 30
Current limit Ith A 8
Rated operational limits at 70 �C 24 V 115 V 250 V
Conforming to IEC 60947-5-1/1991
and VDE 0660 AC-15 A 333
DC-13 A 2 0.3 0.1
Minimum switching capacity 12 V/10 mA
Switching voltage Rated V c 250
Max V c 440
Contact material Nickel Silver 90/10
a.c. load d.c. load
Curve 1 Curve 2 Load limit curve
Electrical durability of the contacts on a resistive Reduction factor k for inductive loads
load in millions of operating cycles (applies to values taken from the
durability curve opposite)
10 1 300
0,9
200
0,8
0,7
100
1 3
0,6
2
50
0,5
40
1
0,1 30
0,4
20
0,3 10
0,01
0 1 2 3 4 5 6 7 8 1 0,8 0,6 0,5 0,4 0,3 0,2 0,1 0,2 0,5 1 2 5 10 20
Current broken in A Power factor on breaking (cos �) Current in A
Example: 1 L/R = 20 ms
2 L/R with load protection diode
An LC1-F185 contactor supplied with 115 V/50 Hz for a consumption of 55 VA or a current 3 Resistive load
consumption equal to 0.1 A and cos � = 0.3
For 0.1 A, curve 1 indicates durability of approximately 1.5 million operating cycles.
+
As the load is inductive, it is necessary to apply a reduction coefficient k to this number of
RM4
cycles, as indicated by curve 2.
For cos � = 0.3 : k = 0.6
K
The electrical durability therefore becomes:

1.5 106 operating cycles x 0.6 = 900 000 operating cycles
28470/3
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Voltage in V
Reduction factor k
Millions of operating cycles
Protection components
Characteristics:
Zelio Control measurement and control relays
page 28471/4
Current measurement relays RM4-JA
References:
page 28471/5
Dimensions, schemes:
Presentation
page 28471/6
Setting-up:
page 28471/7
Functions
These devices are designed to detect when a preset current threshold is exceeded, on a.c. or d.c. supply.
They have a transparent, hinged flap on their front face to prevent any accidental alteration of the settings.
This flap can be directly sealed.
Type of Overcurrent Overcurrent or Measuring
relay control undercurrent control (1) range
RM4-JA01 Yes No 3 mA& 1 A
RM4-JA31 Yes Yes 3 mA& 1 A
RM4-JA01
RM4-JA32 Yes Yes 0.3 A& 15 A
Applications:
- excitation control of d.c. machines,
- control of load state of motors and generators,
- control of current drawn by a 3-phase motor,
- monitoring of heating or lighting circuits,
- control of pump draining (undercurrent),
- control of overtorque (crushers).
- monitoring of electromagnetic brakes or clutches.
Description
RM4-JA01 RM4-JA31 RM4-JA32
Width 22.5 mm Width 22.5 mm Width 45 mm
RM4-JA32
1 1 1
2 2 2
R R 3 R 3
U U U
4 4
1 Adjustment of current threshold as % of setting range max. value.
2 Hysteresis adjustment from 5 to 30 % (2).
3 Fine adjustment of time delay as % of setting range max. value.
4 10-position switch combining:
- selection of the timing range: 1 s, 3 s, 10 s, 30 s, no time delay.
- selection of overcurrent (>) or undercurrent (<) detection.
See table below.
R Yellow LED: indicates relay state.
U Green LED: indicates that supply to the RM4 is on.
Table showing details for switch 4
Switch Function Time delay
position (t)
< 0 Undercurrent detection No time delay
< 1 Undercurrent detection 0.05 to 1 s
< 3 Undercurrent detection 0.15 to 3 s
< 10 Undercurrent detection 0.5 to 10 s
< 30 Undercurrent detection 1.5 to 30 s
> 0 Overcurrent detection No time delay
> 1 Overcurrent detection 0.05 to 1 s
> 3 Overcurrent detection 0.15 to 3 s
> 10 Overcurrent detection 0.5 to 10 s
> 30 Overcurrent detection 1.5 to 30 s
(1) Selection by switch on front face.
(2) Value of current difference between energisation and de-energisation of the output relay (% of the current threshold
to be measured).
28471/ 2
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Protection components
Characteristics:
Zelio Control measurement and control relays
page 28471/4
Current measurement relays RM4-JA
References:
page 28471/5
Dimensions, schemes:
Presentation (continued)
page 28471/6
Setting-up:
page 28471/7
Operating principle
The supply voltage is connected to terminals A1-A2.
The current to be monitored is connected to terminals B1, B2, B3 and C. See diagram below.
Hysteresis is adjustable between 5 and 30 %: for overcurrent h = (IS1 - IS2) / IS1, for undercurrent h = (IS2 - IS1) / IS1.
A measuring cycle lasts only 80 ms, which allows rapid detection of changes in current.
Relay set for overcurrent detection (RM4-JA01 or selector on  > for model RM4-JA3i).
If the current is greater than the setting threshold IS1, the output relay is energised with or without a time delay, depending
on the model. When the current returns to a value IS2 below the threshold, depending on the hysteresis setting, the relay
is instantaneously de-energised.
Relay set for undercurrent detection (selector on  < , model RM4-JA3i only).
If the current is less than the threshold setting IS1, the output relay is energised with or without a time delay, depending
on the model. When the current returns to a value IS2 above the threshold, depending on the hysteresis setting, the relay
is instantaneously de-energised.
Function diagrams:
Overcurrent detection
Function  >
U supply A1-A2
IS1
Current
IS2
measured
15-18
Relay
15-16
25-28
25-26
t < t
t: time delay
Undercurrent detection
Function  <
U supply
A1-A2
IS2
Current
IS1
measured
15-18
Relay
15-16
25-28
25-26
t < t
B1, B2, B3 C
RM4-JA
Load
U drop < 1 V
Note: The measurement ranges can be extended by means of a current transformer, the secondary of which is connected
to the terminals of the corresponding RM4, or by means of a resistor connected in parallel with the measuring input (see
example page 28471/7  Setting-up ).
28471/ 3
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Measurement circuit
Protection components
Presentation:
Zelio Control measurement and control relays
pages 28471/2 and 28471/3
Current measurement relays RM4-JA
References:
page 28471/5
Dimensions, schemes:
Characteristics
page 28471/6
Setting-up:
page 28471/7
Power supply circuit characteristics
Type of relay RM4-JA01 RM4-JA31 and RM4-JA32
Rated supply c 50/60 Hz V 24 110...130 220...240 24...240 110& 130 220...240 380...415
voltage (Un)
a V    24...240   
Average c VA 2 1.9& 3.3 2.7& 3.5 1.5& 3.3 1.9& 3.3 2.7& 3.4 2.7& 3
consumption at Un
a W    1.2 
 
Output relay and operating characteristics
Type of relay RM4-JA01 RM4-JA31 and RM4-JA32
Number of C/O contacts 12
Output relay state Energised when: Energised when:
current measured > threshold setting current measured > threshold setting ( > function)
current measured < threshold setting ( < function)
Setting accuracy of the As % of the full scale value: ą 5 %
switching threshold
Switching threshold drift % d" 0.06 per degree centigrade, depending on the permissible ambient temperature
% d" 0.5, within the supply voltage range (0.85& 1.1 Un)
Hysteresis (adjustable) % 5& 30 of the current threshold setting
Setting accuracy of As % of the full scale value: ą 10 %
the time delay
Time delay drift %  d" 0.07 per degree centigrade, depending on
temperature
d" 0.5, within the supply voltage range
(0.85& 1.1 Un)
Measuring cycle ms d" 80
Measuring input characteristics
Internal input resistance and permissible overload depending on the current measurement ranges
Type of relay RM4-JA01 and RM4-JA31 RM4-JA32
Measurement range 3& 30 mA 10& 100 mA 0.1& 1 A 0.3& 1.5 A 1& 5 A 3& 15 A
c 50-60 Hz and a
Internal input resistance Ri &! 33 10 1 0.06 0.02 0.006
Permissible continuous overload A 0.05 0.15 1.5 2 7 20
Permissible non repetitive overload A 0.2 0.5 5 10 15 100
for t d" 3 s
28471/ 4
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Protection components
Presentation:
Zelio Control measurement and control relays
pages 28471/2 and 28471/3
Current measurement relays RM4-JA
Characteristics:
page 28471/4
Dimensions, schemes:
References
page 28471/6
Setting-up:
page 28471/7
Current measurement relays: overcurrent detection
Time delay Current to be measured Width Output Basic reference. Weight
depending on connection relay Complete with code indicating
c or a the voltage code (1)
mm kg
None 3...30 mA 22.5 1 C/O RM4-JA01i 0.172
10...100 mA
0.1...1 A
RM4-JA01
Current measurement relays: overcurrent or undercurrent detection
Adjustable Current to be measured Width Output Basic reference. Weight
time delay depending on connection relay Complete with code indicating
c or a the voltage code (1)
smm kg
0.05...30 3...30 mA 22.5 2 C/O RM4-JA31ii 0.172
10...100 mA
0.1...1 A
RM4-JA32
0.3...1.5 A 45 2 C/O RM4-JA32ii 0.204
1...5 A
3...15 A
(1) Standard supply voltages
RM4-JA01 Volts 24 110...130 220...240
c 50/60 Hz B F M
RM4-JA31 Volts 24...240 110...130 220...240 380...415
and RM4-JA32 c 50/60 Hz MW F M Q
a MW   
28471/ 5
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Protection components
Presentation:
Zelio Control measurement and control relays
pages 28471/2 and 28471/3
Current measurement relays RM4-JA
Characteristics:
page 28471/4
References:
Dimensions, schemes
page 28471/5
Setting-up:
page 28471/7
Dimensions
Dimensions Rail mounting Screw fixing
RM4-JA (common side view) RM4-JAi1 RM4-JA32
80 22,5 45 89,5
82
�4
Schemes, connection
Terminal blocks
RM4-JA01 RM4-JA31 RM4-JA32
A1 A2 C A1 A2 C B1 B2 B3
A1 A2 C
B1 B2 B3
B1 B2 B3
C C
C
28 26 25
18 16 15 18 16 15 28 26 25
18 16 15
A1-A2 Supply voltage Connection and current values to be measured, depending on type of RM4-JA
B1, B2. Currents to be measured RM4-JA01 B1-C 3& 30 mA RM4-JA32 B1-C 0.3& 1.5 A
B3, C (see table opposite) and RM4-JA31 B2-C 10& 100 mA B2-C 1& 5 A
B3-C 0.1& 1 A B3-C 3& 15 A
Application schemes
Example: detection of blockage on a crusher (overcurrent function)
Current measured d" 15 A Current measured > 15 A
Q1
Q1
Q2
Q2
A1
A1 B3
B3
C A2
C A2
RM4-JA3 RM4-JA3
KM1
KM1
Stop Stop
KM1
Overtorque Start KM1 Overtorque Start
M1
M1
3 KM1
3 KM1
N
N
28471/ 6
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B1
B2
B1
B2
B1
B2
16
18
15
16
26
18
15
28
25
16
26
18
15
28
25
A1
A2
B3
A1
A2
B3
A1
A2
B3
1
2
1/L1
3
4
3/L2
5
6
5/L3
1
2
1/L1
3
4
3/L2
5
6
5/L3
26
16
26
16
25
28
15
18
25
28
15
18
2
1
2/T1
4
3
4/T2
6
5
6/T3
2
1
2/T1
4
3
4/T2
6
5
6/T3
V1
U1
V1
W1
U1
W1
Protection components
Presentation:
Zelio Control measurement and control relays
pages 28471/2 and 28471/3
Current measurement relays RM4-JA
Characteristics:
page 28471/4
References:
Setting-up
page 28471/5
Dimensions, schemes:
page 28471/6
Example of overcurrent to be measured
Overcurrent threshold at: 13 A.
Output relay time delay: 5 s.
Reset current threshold: 11 A.
Supply voltage: 127 V a.
i Product selected RM4-JA32MW
Connection of current to be measured B3-C (3 to 15 A)
1
2
R 3
U
4
Adjustments:
i Adjustment of function and timing range, switch 4:
- determine whether overcurrent or undercurrent detection is required; in this example, overcurrent.
- determine the timing range, immediately greater than the time required; in this example, 10 s.
- position switch 4 according to the above 2 criteria; in this example, switch 4 on > 10.
i Fine adjustment of time delay:
Depending on the max. range setting displayed at 4 (in this example: 10 s) use potentiometer 3 to set the required time delay as a % of value 4.
In this example, the required time = 5 s therefore:
t x 100 5 x 100
= = 50 % Set the time delay potentiometer 3 to 50.
4 10
i Set the current threshold setting potentiometer 1 as a percentage of the maximum value of the measuring range selected when wiring.
In this example: wiring B3-C, max. value of measuring range = 15 A, therefore:
13 x 100
Setting 1 == 87 % Set the current threshold setting potentiometer 1 to 87.
15
i Set the hysteresis 2 as a % of the threshold value; in this example:
13 - 11
Setting 2 = = 15.4 % Set the hysteresis 2 to 15 (13 - 11 = 2 i.e. 15.4 % of the current to be measured).
13
Extension of the measuring range
d.c. or a.c. supply
RM4-JA I
Im
B1 Simply connect a resistor  Rs to terminals B1-C (or B2, B3-C) on the measuring input.
The relay energisation threshold will be towards the middle of the setting potentiometer range if the value of Rs is in the
Ri region of:
Rs
C
Ri
Rs = where : Ri Internal resistance of input B1-C.
(2I/Im) - 1
Im Maximum value of threshold setting range.
I Current threshold to be measured.
Power dissipated by Rs: P = Rs (I -Im/2)2
Application:
Use of relay RM4-JA31ii (10 to 100 mA).
Connection B2-C to measure a threshold of 1 A, knowing that Ri = 10 &! for this rating and that Im = 100 mA
10
The value of Rs will be: = 0.526 &!
(2 x 1/0.1) - 1
0.1
P = (1 - )2 x 0.526 i.e. 0.47 W
2
Select a resistor Rs capable of dissipating at least twice the calculated value, i.e. 1 W for this example, in order to limit temperature rise.
On an a.c. supply, it is also possible to use a current transformer.
28471/ 7
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Protection components
Characteristics:
Zelio Control measurement and control relays
page 28472/4
Voltage measurement relays RM4-UA
References:
page 28472/5
Dimensions, schemes:
Presentation
page 28472/6
Setting-up:
page 28472/7
Functions
These devices are designed to detect when a preset voltage threshold is exceeded, on a.c. or d.c. supply.
They have a transparent, hinged flap on their front face to prevent any accidental alteration of the settings.
This flap can be directly sealed.
Type of Overvoltage Overvoltage or Measuring
relay control undervoltage control (1) range
RM4-UA0i Yes No 50 mV& 500 V
RM4-UA3i Yes Yes 50 mV& 500 V
RM4-UA01
Applications:
- d.c. motor overspeed control,
- battery monitoring,
- monitoring of a.c. or d.c. supplies,
- speed monitoring (with tacho-generator).
Presentation
RM4-UA0i RM4-UA3i
Width 22.5 mm Width 22.5 mm
1 1
2 2
R R 3
U U
4
1 Adjustment of voltage threshold as % of setting range max. value.
2 Hysteresis adjustment from 5 to 30 % (2).
3 Adjustment of time delay as % of setting range max. value.
4 Switch combining:
- selection of the timing range: 1s, 3s, 10s, 30s, no time delay,
- selection of overvoltage (>) or undervoltage (<) detection.
See table below.
R Yellow LED: indicates relay state.
U Green LED: indicates that supply to the RM4 is on.
Table showing details for switch 4
Switch Function Time delay
position (t)
< 0 Undervoltage detection No time delay
< 1 Undervoltage detection 0.05 to 1 s
< 3 Undervoltage detection 0.15 to 3 s
< 10 Undervoltage detection 0.5 to 10 s
< 30 Undervoltage detection 1.5 to 30 s
> 0 Overvoltage detection No time delay
> 1 Overvoltage detection 0.05 to 1 s
> 3 Overvoltage detection 0.15 to 3 s
> 10 Overvoltage detection 0.5 to 10 s
> 30 Overvoltage detection 1.5 to 30 s
(1) Selection by switch on front face.
(2) Value of voltage difference between energisation and de-energisation of the output relay (% of the voltage threshold
to be measured).
28472/ 2
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Protection components
Characteristics:
Zelio Control measurement and control relays
page 28472/4
Voltage measurement relays RM4-UA
References:
page 28472/5
Dimensions, schemes:
Presentation (continued)
page 28472/6
Setting-up:
page 28472/7
Operating principle
The supply voltage is connected to terminals A1-A2.
The voltage to be monitored is connected to terminals B1, B2 or B3 and C.
Hysteresis is adjustable between 5 and 30 %:
for overvoltage h = (US1 - US2) / US1, for undervoltage h = (US2 - US1) / US1.
A measurement cycle lasts only 80 ms, which allows rapid detection of changes in voltage.
Relays set for overvoltage detection (RM4-UA0i or selector on  > for model RM4-UA3i):
If the voltage is greater than the threshold setting US1, the output relay is energised, with or without a time delay. When
the voltage returns to a value US2 below the threshold, depending on the hysteresis setting, the relay is instantaneously
de-energised.
Relays set for undervoltage detection (selector on  < , model RM4-UA3i only):
If the voltage is less than the threshold setting US1, the output relay is energised, with or without a time delay. When the
voltage returns to a value US2 above the threshold, depending on the hysteresis setting, the relay is de-energised.
Function diagrams
Overvoltage control
Function  >
U supply A1-A2
US1
US2
Voltage
15-18
measured
15-16
Relay
25-28
25-26
t: time delay < t
t
Undervoltage control
Function  <
U supply A1-A2
US2
US1
Voltage
measured
15-18
15-16
Relay
25-28
25-26
t < t
Note: the measurement ranges can be extended above 500 V by adding a resistor, see page 28472/7.
The measurement range on c supply can be extended by means of a voltage transformer, the secondary of which is
connected to the measuring terminals of the corresponding RM4 .
28472/ 3
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Protection components
Presentation:
Zelio Control measurement and control relays
pages 28472/2 and 28472/3
Voltage measurement relays RM4-UA
References:
page 28472/5
Dimensions, schemes:
Characteristics
page 28472/6
Setting-up:
page 28472/7
Power supply circuit characteristics
Type of relay RM4-UA0i RM4-UA3i
Rated supply c 50/60 Hz V 24 110...130 220...240 24...240 110& 130 220...240 380...415
voltage (Un)
a V    24...240   
Average c VA 2 1.9& 3.3 2.7& 3.5 1.5& 3.3 1.9& 3.3 2.7& 3.4 2.7& 3
consumption at Un
a W    1.2 
 
Output relay and operating characteristics
Type of relay RM4-UA0i RM4-UA3i
Number of C/O contacts 12
Output relay state Energised when: Energised when:
voltage measured > threshold setting voltage measured > threshold setting ( > function )
voltage measured < threshold setting ( < function)
Setting accuracy of the As % of the full scale value: ą 5 %
switching threshold
Switching threshold drift % d" 0.06 per degree centigrade, depending on the permissible ambient temperature
% d" 0.5, within the supply voltage range (0.85& 1.1 Un)
Hysteresis (adjustable) % 5& 30 of the voltage threshold setting
Setting accuracy of As % of the full scale value: ą 10 %
the time delay
Time delay drift %  d" 0.5, within the supply voltage range
(0.85& 1.1 Un)
d" 0.07 per degree centigrade, depending on the
rated operating temperature
Measuring cycle ms d" 80
Measuring input characteristics
Internal input resistance and permissible overload depending on the current measurement ranges
Type of relay RM4-UAi1 RM4-UAi2 RM4-UAi3
Measurement range V 0.05& 0.5 0.3& 3 0.5& 5 1& 10 5& 50 10& 100 30& 300 50& 500
c 50-60 Hz and a
Internal input resistance Ri k&! 6.6 43 71 23 112 225 668 1111
Permissible continuous overload V 20 60 80 90 150 300 400 550
Permissible non repetitive overload V 25 80 100 100 200 400 500 550
for t d" 1 s
28472/ 4
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Protection components
Presentation:
Zelio Control measurement and control relays
pages 28472/2 and 28472/3
Voltage measurement relays RM4-UA
Characteristics:
page 28472/4
Dimensions, schemes:
References
page 28472/6
Setting-up:
page 28472/7
Voltage measurement relays: overvoltage detection
Time delay Voltage to be measured Width Output Basic reference. Weight
depending on connection relay Complete with code indicating
c or a the voltage code (1)
Vmm kg
None 0.05...0.5 22.5 1 C/O RM4-UA01i 0.168
0.3& 3
0.5& 5
1...10 22.5 1 C/O RM4-UA02i 0.168
5& 50
10& 100
30...300 22.5 1 C/O RM4-UA03i 0.168
50& 500
RM4-UA01
Voltage measurement relays: overvoltage or undervoltage detection
Adjustable Voltage to be measured Width Output Basic reference. Weight
time delay depending on connection relay Complete with code indicating
c or a the voltage code (1)
sV mm kg
0.05...30 0.05...0.5 22.5 2 C/O RM4-UA31ii 0.168
0.3& 3
0.5& 5
1...10 22.5 2 C/O RM4-UA32ii 0.168
5& 50
10& 100
30...300 22.5 2 C/O RM4-UA33ii 0.168
50& 500
(1) Standard supply voltages
RM4-UA0i Volts 24 110...130 220...240
c 50/60 Hz B F M
RM4-JA3i Volts 24...240 110...130 220...240 380...415
c 50/60 Hz MW F M Q
a MW   
28472/ 5
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Protection components
Presentation:
Zelio Control measurement and control relays
pages 28472/2 and 28472/3
Voltage measurement relays RM4-UA
Characteristics:
page 28472/4
References:
Dimensions, schemes
page 28472/5
Setting-up:
page 28472/7
Dimensions
Dimensions Rail mounting Screw fixing
RM4-UA
80 22,5 89,5
82
�4
Schemes, connection
Terminal blocks
RM4-UA01, UA02 RM4-UA03 RM4-UA31, UA32 RM4-UA33
A1 A2 C A1 A2 C A1 A2 C A1 A2 C
B1 B2 B3 B2 B3 B1 B2 B3 B2 B3
C C C C
28 26 25 28 26 25
18 16 15 18 16 15 18 16 15 18 16 15
A1-A2 Supply voltage Connection and voltage values to be measured, depending on type of RM4-UA
B1, B2. Voltages to be measured RM4-UAi1 B1-C 0.05& 0.5 V RM4-UAi2 B1-C 1& 10 V RM4-UAi3 B2-C 30& 300 V
B3, C (see table opposite) B2-C 0.3& 3 V B2-C 5& 50 V B3-C 50& 500 V
B3-C 0.5& 5 V B3-C 10& 100 V
Application scheme
Example: overspeed monitoring (undervoltage function)
Q1
Q3 Q4
2 1 1 2
A1 B1
U
Tacho-
Q2
generator
2 1
A2 C v
RM4-UA
KM1
Stop
Overspeed Start KM1
M1
KM1
3
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B1
B2
B1
B2
B2
B2
16
16
26
18
15
18
15
28
25
16
26
16
18
15
18
15
28
25
A1
A2
B3
A1
A2
B3
A1
A2
B3
A1
A2
B3
26
16
25
28
15
18
2
1
2
1/L1
4
3
4
3/L2
6
5
6
5/L3
V1
U1
W1
Protection components
Presentation:
Zelio Control measurement and control relays
pages 28472/2 and 28472/3
Voltage measurement relays RM4-UA
Characteristics:
page 28472/4
References:
Setting-up
page 28472/5
Dimensions, schemes:
page 28472/6
Example of undervoltage to be measured
Undervoltage threshold to be measured: 12 V a.
Time delay of the output relay: 20 s.
Reset voltage threshold: 13.2 V.
Supply voltage: 230 V c 60 Hz.
i Product selected RM4-UA32M
Connection of voltage to be measured B2-C (5 to 50 V)
1
2
R 3
U
4
Adjustments:
i Adjustment of function and timing range, switch 4:
- determine the timing range, immediately greater than the time required, in this example 30 s.
- determine whether overvoltage or undervoltage detection is required, in this example undervoltage.
- position switch 4 according to the above 2 criteria, in this example, switch 4 on < 30.
i Fine adjustment of time delay:
Depending on the max. range setting displayed at 4 (in this example: 30 s) use potentiometer 3 to set the required time delay as a % of value 4.
In this example, the required time = 20 s therefore:
t x 100 20 x 100
= = 66 % Set the time delay potentiometer 3 to 66.
4 30
i Set the voltage threshold setting potentiometer 1 as a percentage of the maximum value of the measuring range selected when wiring.
In this example: wiring B2-C, max. value of measuring range = 50 V, therefore:
12 x 100
Setting 1 == 24 % Set the voltage threshold setting potentiometer 1 to 24.
50
i Set the hysteresis 2 as a % of the threshold value; in this example:
13.2 - 12
Setting 2 = = 10 % Set the hysteresis 2 to 10.
12
Extension of the measuring range
d.c. or a.c. supply
RM4-UA33
Rs
C
Simply connect an additional resistor (Rs) in series with the measuring input B3 or C.
If the value of Rs is in the region of:
Ri
U > 500 V
U
Rs = Ri ( - 1) where: Ri Internal resistance of input B3-C.
B3
Um
Um Maximum value of threshold setting range.
U Voltage threshold to be measured.
The tripping threshold of the relay will be towards the maximum graduation on the threshold setting potentiometer.
In general, the power consumed by the resistor does not exceed 0.5 W.
For a.c. voltages, it is also possible to use a voltage transformer.
Supply by the measured voltage
For monitoring mains and power supplies, the RM4-UA can be supplied by the voltage to be controlled, provided that:
- the measurement threshold is within the operating range of the product's power supply (0.85& 1.1 Uc).
B2/B3
- variations of the voltage to be measured are compatible with the supply and measurement voltage ranges.
RM4-UA
C
28472/ 7
Te
A2
A1
Protection components
Zelio Control measurement and control relays
3-phase supply control relays RM4-T
Characteristics:
page 28473/5
References:
Presentation
page 28473/6
Dimensions, schemes:
page 28473/7
Functions
These devices are designed to monitor 3-phase supplies and to protect motors and other loads against the faults listed
in the table below.
They have a transparent, hinged flap on their front face to prevent any accidental alteration of the settings. This flap can
be directly sealed.
RM4-TG RM4-TU RM4-TR RM4-TA
Monitoring of rotational
direction of phases
Detection of complete failure
of one or more of the phases
Undervoltage detection
RM4-T
Overvoltage and undervoltage
detection (2 thresholds)
Detection of phase asymmetry
(imbalance)
Function performed
Function not performed
Applications
i Control for connection of moving equipment (site equipment, agricultural equipment, refrigerated trucks).
i Control for protection of persons and equipment against the consequences of reverse running (lifting, handling,
elevators, escalators, etc.).
i Control of sensitive 3-phase supplies.
i Protection against the risk of a driving load (phase failure).
i Normal/emergency power supply switching.
Presentation
RM4-TG RM4-TU
1
R R
R Yellow LED: indicates relay output state. R Yellow LED: indicates relay output state.
< U Red LED: undervoltage fault.
1 Undervoltage setting potentiometer.
RM4-TR31. RM4-TR33. RM4-TA3 RM4-TA0
RM4-TR32 RM4-TR34
>U >U A
3 1 1
P
P P
4
R R
R 1 R 1
U U U
2 2 2
1 Time delay function selector: 1 Asymmetry threshold setting potentiometer, from 5 to 15 %
Fault detection delayed. 2 Potentiometer for setting time delay, 0.1 to 10 s.
Fault detection extended. R Yellow LED: indicates relay state.
2 Potentiometer for setting time delay in seconds. U Green LED: indicates that supply to the RM4 is on.
3 Potentiometer for setting overvoltage as a A Red LED: phase asymmetry.
direct value. P Red LED: phase failure or incorrect rotational
4 Potentiometer for setting undervoltage as a direction of phases.
direct value.
R Yellow LED: indicates relay state.
U Green LED: indicates that supply to the RM4 is on.
> U Red LED: overvoltage fault
< U Red LED: undervoltage fault
P Red LED: phase failure or incorrect rotational
direction of phases.
28473/ 2
Te
Protection components
Zelio Control measurement and control relays
3-phase supply control relays RM4-T
Characteristics:
page 28473/5
References:
Presentation (continued)
page 28473/6
Dimensions, schemes:
page 28473/7
Operating principle
The supply voltage to be monitored is connected to terminals L1, L2, L3 of the product.
There is no need to provide a separate power supply for RM4-T relays; they are self-powered by terminals L1, L2, L3.
i Monitoring rotational direction of phases and detection of complete failure of one of more of the phases
(RM4-T all models)
When terminals L1, L2, L3 are energised, the relay is energised and the yellow LED comes on if the rotational direction
of phases is correct and if all 3 phases are present.
If one or more of the phases have failed or if the rotational direction is incorrect, the relay is not energised at switch-
on. In normal operation (no fault) the relay is energised; it de-energises instantaneously in the event of failure of one
or more of the phases (any time delay set is not active on these faults).
In the event of failure or absence of a single phase, a voltage greater than the detection threshold (H" 130 V on RM4-TG,
undervoltage threshold setting on RM4-TU and RM4-TR) can be generated back through the control circuit, thus
preventing detection of the phase failure. In this case, we recommend the use of RM4-TA relays.
The absence of a phase is signalled, on RM4-TR and RM4-TA, by illumination of led  P .
i Overvoltage and undervoltage detection (RM4-TR):
In normal operation, the relay is energised and LEDs  U and  R are illuminated.
If the average of the 3 voltages between phases goes outside the range to be monitored, the output relay is de-
energised:
- overvoltage: the Red LED  > U illuminates.
- undervoltage: the Red LED  < U illuminates.
When the supply returns towards its rated value, the relay is re-energised according to the hysteresis value (5%) and
the corresponding red LED goes out.
A selector switch allows selection of an adjustable time delay from 0.1 s to 10 s. With function transient  over or
 under voltages are not taken into account. With function all variations above or below are taken into account and
re-energisation of the relay is delayed.
In all cases, in order to be detected, the duration of the overvoltage or undervoltage must be greater than the measuring
cycle time (80 ms).
Function diagram (RM4-TR31, RM4-TR32)
RM4-TR31
RM4-TR32
< t
Setting > U
0.95 x Setting > U
1.05 x Setting < U
Setting < U
< t
0 Volt
UL1 L2 L3
tt
15/18 25/28
Function
15/16 25/26
tt t t t
15/18 25/28
Function
15/16 25/26
t: time delay
Function diagram (RM4-TR33, RM4-TR34)
RM4-TR33
RM4-TR34
< t
TR33 TR34
242 V 440 V
230 V 418 V
208 V 378 V
198 V 360 V
< t
0 Volt
UL1 L2 L3
t t
15/18 25/28
Function
15/16 25/26
tt t t t
15/18 25/28
Function
15/16 25/26
t: time delay
28473/ 3
Te
Protection components
Zelio Control measurement and control relays
3-phase supply control relays RM4-T
Characteristics:
page 28473/5
References:
Presentation (continued)
page 28473/6
Dimensions, schemes:
page 28473/7
Operating principle (continued)
i Undervoltage detection only (RM4-TU)
In normal operation, the output relay is energised and the yellow LED is illuminated.
If the average of the 3 voltages between phases is less than the undervoltage threshold setting, the relay is de-
energised after 550 ms and the red LED  < U illuminates.
Function diagram
1.05 x Setting < U
Setting < U
< t
0 volt
UL1 L2 L3
t
15/18 25/28
15/16 25/26
t: fixed time delay = 550 ms
i Detection of phase asymmetry (RM4-TA)
In normal operation, the output relay is energised and the yellow and green LEDs are illuminated.
In the event of an asymmetry fault, after a time delay set between 0.1 s and 10 s (on RM4-TA3 only), the output relay
is de-energised, the yellow LED goes out and red LED  A illuminates (RM4-TA3i only).
The relay re-energises when the asymmetry value measured is less than half of the asymmetry value setting
(hysteresis).
Function diagram
Asymmetry >
L1 L2 L3
Asymmetry >
set threshold
set threshold
L3 L2 L1 L3 L2 L1
15-18
15-16
Relay
25-28
25-26
t t
t: time delay
Example: asymmetry set at 10 %, mains supply voltage 400 V
- relay de-energisation threshold: 400 - 10 % = 360 V.
10 %
- relay re-energisation threshold: 400 V      = 380 V.
2
28473/ 4
Te
Protection components
Zelio Control measurement and control relays
3-phase supply control relays RM4-T
Presentation:
pages 28473/2 to 28473/4
References:
Characteristics
page 28473/6
Dimensions, schemes:
page 28473/7
Type of relay RM4-TG RM4-TU RM4-TR RM4-TA
Output relay and operating characteristics
Number of C/O contacts 222RM4-TA3i: 2
RM4-TA0i: 1
Output relay state Energised during Energised during Energised during Energised during
fault free fault free fault free fault free
operation. operation. operation. operation.
De-energised or De-energised on De-energised on De-energised on
unable to detection of detection of detection of
energise on undervoltage or overvoltage, asymmetry
detection of rotational direction undervoltage or fault, phase
rotational direction fault or rotational failure or
fault or failure of failure of one or direction fault or rotational
one or more more phases phase failure direction fault
phases
Accuracy of switching As % of the set value  ą 3 % ą 3 % ą 3 %
threshold setting
Switching threshold drift Depending on the  d" 0.06 % per d" 0.06 % per d" 0.06 % per
permissible ambient degree centigrade degree centigrade degree centigrade
temperature
Within the  d" 0.5 % d" 0.5 % d" 0.5 %
measuring range
Accuracy of time delay As % of the full scale  ą 10 % ą 10 % ą 10 %
setting value
Time delay drift Within the  d" 0.5 % d" 0.5 % d" 0.5 %
measuring range
Depending on the  d" 0.07 % per d" 0.07 % per d" 0.07 % per
rated operational degree centigrade degree centigrade degree centigrade
temperature
Hysteresis Fixed  About 5 % of the About 5 % of the About 50 % of the
de-energisation de-energisation asymmetry
threshold threshold percentage
Measuring cycle ms d" 80 d" 80 d" 80 d" 80
Measuring input characteristics
Minimum operational voltage (1) L1 L2 V 140 RM4-TU01: 160 RM4-TR31, RM4-TA01,
or RM4-TR33: 160 RM4-TA31: 160
L2 L3
or RM4-TU02: 290 RM4-TR32, RM4-TA02,
L1 L3 RM4-TR34: 290 RM4-TA32: 290
Maximum permissible L1 L2 L3 V 580 RM4-TU01: 300 RM4-TR31, RM4-TA01,
voltage between phases RM4-TR33: 300 RM4-TA31: 300
RM4-TU02: 580 RM4-TR32, RM4-TA02,
RM4-TR34: 580 RM4-TA32: 580
(1) Minimum voltage required for operation of indicators and of the time delay.
28473/ 5
Te
Protection components
Zelio Control measurement and control relays
3-phase supply control relays RM4-T
Presentation:
pages 28473/2 to 28473/4
Characteristics:
References
page 28473/5
Dimensions, schemes:
page 28473/7
Control relays: rotational direction and presence of phases
Time delay Rated Width Output Reference Weight
mains supply relay
voltage (1)
sV mm kg
None 200...500 22.5 2 C/O RM4-TG20 0.110
50/60 Hz
Control relays: rotational direction and presence of phases + undervoltage
Time delay Rated Control Width Output Reference Weight
mains supply threshold relay
RM4-TG20
voltage (1)
sV V mm kg
None 200& 240 Undervoltage 22.5 2 C/O RM4-TU01 0.110
50/60 Hz 160& 220
380& 500 Undervoltage 22.5 2 C/O RM4-TU02 0.110
50/60 Hz 300& 430
Control relays: rotational direction and presence of phases + overvoltage and undervoltage
Relays with fixed voltage thresholds
Adjustable Rated Control Width Output Reference Weight
time delay mains supply threshold relay
voltage (1)
sV V mm kg
0.1...10 220 Undervoltage 22.5 2 C/O RM4-TR33 0.110
50/60 Hz 198
Overvoltage
242
400 Undervoltage 22.5 2 C/O RM4-TR34 0.110
50/60 Hz 360
Overvoltage
440
Relays with adjustable voltage thresholds
RM4-TR33
Adjustable Rated Control Width Output Reference Weight
time delay mains supply threshold relay
voltage (1)
sV V mm kg
0.1& 10 200& 240 Undervoltage 22.5 2 C/O RM4-TR31 0.110
50/60 Hz 160& 220
Overvoltage
220& 300
380& 500 Undervoltage 22.5 2 C/O RM4-TR32 0.110
50/60 Hz 300& 430
Overvoltage
420& 580
Control relays: rotational direction and presence of phases + asymmetry
Time delay Rated Control Width Output Reference Weight
on mains supply threshold relay
de-energisation voltage (1)
sV % mm kg
Fixed 200...240 Asymmetry 22.5 1 C/O RM4-TA01 0.110
0.5 50/60 Hz 5& 15
380& 500 Asymmetry 22.5 1 C/O RM4-TA02 0.110
50/60 Hz 5& 15
Adjustable 200...240 Asymmetry 22.5 2 C/O RM4-TA31 0.110
0.1& 10 50/60 Hz 5& 15
380...500 Asymmetry 22.5 2 C/O RM4-TA32 0.110
50/60 Hz 5& 15
RM4-TA01
(1) Can be used on other supply voltages provided that the minimum operational voltages, maximum voltage between
phases and compatibility with the control threshold ranges are complied with, see page 28473/5.
28473/ 6
Te
Protection components
Zelio Control measurement and control relays
3-phase supply control relays RM4-T
Presentation:
pages 28473/2 to 28473/4
Characteristics:
Dimensions, schemes
page 28473/5
References:
page 28473/6
Dimensions Rail mounting Screw fixing
RM4-T
80 22,5 89,5
82
�4
Schemes, connection
Terminal blocks
i i i i
RM4-TG20, TU0i RM4-TR3i, TA3i RM4-TA0i
i i i i
i i i i
i i i i
L1 L2 L3
L1 L2 L3 L1 L2 L3
28 (24) 25 (21) 26 (22)
28 25 26
18 (14) 15 (11) 16 (12)
18 15 16 18 15 16
L1, L2, L3 Supply to be monitored L1, L2, L3 Supply to be monitored L1, L2, L3 Supply to be monitored
15(11)-18(14) 1st C/O contact 15-18 1st C/O contact 15-18 1st C/O contact
15(11)-16(12) of the output relay 15-16 of the output relay 15-16 of the output relay
25(21)-28(24) 2nd C/O contact 25-28 2nd C/O contact
25(21)-26(22) of the output relay 25-26 of the output relay
Application scheme
Example
Q1
L3
L2
L1
RM4-T
Q2
Stop
Start
Fault KM1
KM1
N
KM1
M1
3
28473/ 7
Te
6
78
78
6
15
25
L1
L2
L3
L1
L2
L3
L1
L2
L3
18
28
16
26
16
18
15
26
28
25
18
15
16
(12)
(14)
(11)
(22)
(24)
(21)
26
16
25
28
15
18
3
4
3/L2
5
6
5/L3
1
2
1/L1
2
1
2/T1
4
3
4/T2
6
5
6/T3
V1
U1
W1
Protection components
Zelio Control measurement and control relays
Single-phase supply control relays RM4-UB
Characteristics:
page 28474/3
References:
Presentation
page 28474/4
Dimensions, schemes:
page 28474/5
Functions
These devices are designed for monitoring single-phase mains and power supplies.
They have a transparent, hinged flap on their front face to prevent any accidental alteration of the settings.
The flap can be directly sealed.
Applications
- Protection of electronic or electromechanical devices against overvoltage and undervoltage.
- Normal/emergency power supply switching.
RM4-UB
Presentation
RM4-UB
>U
1
2
R 3
U
4
1 Overvoltage setting potentiometer.
2 Undervoltage setting potentiometer.
3 Time delay function selector:
Fault detection delayed.
Fault detection extended.
4 Potentiometer for setting time delay in seconds.
R Yellow LED: indicates relay state.
U Green LED: indicates that supply to the RM4 is on.
> U Red LED: overvoltage fault
< U Red LED: undervoltage fault
Operating principle
The supply voltage to be monitored is connected to terminals L1, L3 of the product.
There is no need to provide a separate power supply for RM4-UB relays; they are self-powered by terminals L1, L2, L3.
If the voltage goes outside the range to be monitored, the output relay is de-energised:
- overvoltage: red LED  > U illuminates.
- undervoltage: red LED  < U illuminates.
When the supply returns towards its rated value, the relay is re-energised according to the hysteresis value (5%) and the
corresponding red LED goes out.
A selector switch allows selection of an adjustable time delay from 0.1 s to 10 s. With function , transient  over or
 under voltages are not taken into account. With function , all variations above or below are taken into account and
re-energisation of the relay is delayed.
In all cases, in order to be detected, the duration of the overvoltage or undervoltage must be greater than the measuring
cycle time (80 ms).
Function diagram
RM4-UB34
RM4-UB35
< t
Setting > U
0.95 x Setting > U
1.05 x Setting < U
Setting < U
< t
0 Volt
UL1 L3
tt
15/18 25/28
Function
15/16 25/26
tt t t t
15/18 25/28
Function
15/16 25/26
t: time delay
28474/ 2
Te
Protection components
Zelio Control measurement and control relays
Single-phase supply control relays RM4-UB
Presentation:
page 28474/2
References:
Characteristics
page 28474/4
Dimensions, schemes:
page 28474/5
Output relay and operational characteristics
Number of C/O contacts 2
Output relay state Energised during fault free operation.
De-energised on detection of an overvoltage or undervoltage fault.
Setting accuracy of As % of the setting value ą 3 %
switching threshold
Switching threshold drift Depending on the d" 0.06 % per degree centigrade
permissible ambient
temperature
Within the d" 0.5 %
measuring range
Accuracy of time delay As % of the full scale ą 10 %
setting value
Time delay drift Within the d" 0.5 %
measuring range
Depending on the d" 0.07 % per degree centigrade
rated operational
temperature
Hysteresis Fixed About 5 % of the
de-energisation threshold
Measuring cycle ms d" 80
Measuring input characteristics
Minimum operational voltage V RM4-UB34: 60
RM4-UB35: 160
Maximum permissible V RM4-UB34: 300
voltage between L1 and L3 RM4-UB35: 300
28474/ 3
Te
Protection components
Zelio Control measurement and control relays
Single-phase supply control relays RM4-UB
Presentation:
page 28474/2
Characteristics:
References
page 28474/3
Dimensions, schemes:
page 28474/5
Relays with adjustable thresholds
Adjustable Rated Control Width Output Reference Weight
time delay mains supply threshold relay
voltage (1)
sV V mm kg
0.1& 10 100& 200 Undervoltage 22.5 2 C/O RM4-UB34 0.110
50/60 Hz 80& 120
Overvoltage
160& 220
RM4-UB
180& 270 Undervoltage 22.5 2 C/O RM4-UB35 0.110
50/60 Hz 160& 220
Overvoltage
220& 300
(1) Can be used on other supply voltages provided that the minimum operational voltages, maximum voltage between
phases and compatibility with the control threshold ranges are complied with, see page 28474/3.
28474/ 4
Te
Protection components
Zelio Control measurement and control relays
Single-phase supply control relays RM4-UB
Presentation:
page 28474/2
Characteristics:
Dimensions, schemes
page 28474/3
References:
page 28474/4
Dimensions Rail mounting Screw fixing
RM4-UB
80 22,5 89,5
82
�4
Scheme, connection
Terminal block
RM4-UB
L1 L3
28 25 26
18 15 16
L1, L3 Supply to be monitored
15-18 1st C/O contact
15-16 of the output relay
25-28 2nd C/O contact
25-26 of the output relay
Application scheme
Example
Q1
1/L1 2
3/L2 4
5/L3 6
Q2 Q2
Q4
RM4-UB
To
sensitive
loads
28474/ 5
Te
6
78
78
6
L1
L3
16
18
15
26
28
25
1
2
1
2
16
15
18
L3
L1
Protection components
Characteristics:
Zelio Control measurement and control relays
page 28475/4
Liquid level control relays
References:
page 28475/4
Dimensions:
Presentation
page 28475/5
Setting-up:
page 28475/5
Functions
These devices monitor the levels of conductive liquids.
They control the actuation of pumps or valves to regulate levels, and are also suitable for protecting submersible pumps
against running empty, or protecting tanks from  overflow . They can also be used to control dosing of liquids in mixing
processes and to protect heating elements in the event of non immersion.
They have a transparent, hinged flap on their front face to prevent any accidental alternation of the settings. This flap can
be directly sealed.
i Compatible liquids:
- spring, town, industrial and sea water,
- metallic, acid or basic salt solutions,
- liquid fertilizers,
RM4-LG01
- non concentrated alcohol (< 40 %),
- liquids in the food processing industry: milk, beer, coffee, etc.
i Non-compatible liquids:
- chemically pure water,
- fuels, liquid gasses (inflammable),
- oil, concentrated alcohol (> 40 %),
- ethylene, glycol, paraffin, varnish and paints.
Description
RM4-LG01 RM4-LA32
Width 22.5 mm Width 22.5 mm
1
2 2
R 3 R 3
RM4-LA32
U U
4
1 Fine adjustment of time delay (as % of maximum value of setting range).
2 Fine adjustment of response sensitivity (as % of maximum value of setting range).
3 Function selector switch:
- empty or fill .
4 Switch combining:
- selection of the response sensitivity range,
- selection of time delay on energisation or on de-energisation of the relay.
R Yellow LED: indicates relay state.
U Green LED: indicates that supply to the RM4 is on
Table showing details for switch 3
Switch Time delay Sensitivity
position
500 On-delay High = 500 k&! range
500 Off-delay High = 500 k&! range
50 On-delay Medium = 50 k&! range
50 Off-delay Medium = 50 k&! range
5 On-delay Low = 5 k&! range
5 Off-delay Low = 5 k&! range
28475/ 2
Te
Protection components
Characteristics: Zelio Control measurement and control relays
page 28475/4
Liquid level control relays
References:
page 28475/4
Dimensions:
Presentation (continued)
page 28475/5
Setting-up:
page 28475/5
Operating principle
The operating principle is based on a change in the resistance measured between immersed or non immersed electrodes.
Low resistance between electrodes: liquid present. High resistance between electrodes: no liquid present. The electrodes
may be replaced by other sensors or probes which transmit values representing variations in resistance. The a.c.
measuring voltage, which is < 30 V and galvanically insulated from the supply and contact circuits, ensures safe use and
the absence of any electrolysis phenomena.
RM4-L relays may be used:
i For detection of a liquid level, operating with 2 electrodes, one reference electrode and one high level electrode, or an
LA9-RM201 probe. Example: prevention of tank overflow.
i For regulating a liquid level between a minimum and a maximum level, operating with 3 electrodes, or an LA9-RM201
probe. Example: water tower.
The state of the output relay can be configured:
i Empty function : the output relay is energised when high level electrode B2 is immersed and is de-energised when
low level electrode B3 is  dry (1).
i Fill function : the output relay is energised when the low level electrode is  dry and is de-energised when the high
level electrode is immersed (1).
On model RM4-LA32, a time delay can be set on energisation or de-energisation of the output relay in order to raise the
maximum level (function ) or to lower the minimum level (function ).
This function also makes it possible to avoid pulsing of the output relay (wave effect) when operating with 2 electrodes.
Empty function, maximum level detection (2 electrodes or 1 probe LA9-RM201)
B1 B2 B1 B2 B1 B2
Time
Type Function delay
U supply
RM4- switch 3 switch 4
A1/A2
15/18
LG01 
15/16
t t
15/18 25/28
LA32
15/16 25/26
15/18 25/28
LA32
15/16 25/26
Empty function, regulation between a maximum and a minimum level (3 electrodes or 2 probes LA9-RM201)
B1 B3 B2 B1 B3 B2 B1 B3 B2 B1 B3 B2
Time
Type
Function delay
U supply
RM4- switch 3 switch 4
A1/A2
15/18
LG01 
15/16
t t
15/18 25/28
LA32
15/16 25/26
15/18 25/28
LA32
15/16 25/26
Fill function, maximum level detection (2 electrodes or 1 probe LA9-RM201)
B1 B2 B1 B2 B1 B2
Time
Type Function
delay
U supply
RM4- switch 3
switch 4 A1/A2
15/18
LG01 
15/16
t t
15/18 25/28
LA32
15/16 25/26
15/18 25/28
LA32
15/16 25/26
Empty function, regulation between a maximum and a minimum level (3 electrodes or 2 probes LA9-RM201)
B1 B3 B2 B1 B3 B2 B1 B3 B2 B1 B3 B2
Time
Type Function delay
U supply
RM4- switch 3 switch 4
A1/A2
15/18
LG01 
15/16
t t
15/18 25/28
LA32
15/16 25/26
15/18 25/28
LA32
15/16 25/26
B1: reference electrode B2: high level electrode B3: low level electrode
(1) When operating with 2 electrodes, the high level electrode performs both high and low level functions.
28475/3
Te
Protection components
Zelio Control measurement and control relays
Liquid level control relays
Presentation:
pages 28475/2 and 28475/3
Dimensions:
Characteristics, references
page 28475/5
Setting-up:
page 28475/5
Type of relay RM4-LG01 RM4-LA32
Power supply circuit characteristics
Rated supply c 50/60 Hz V 24 110...130 220...240 380...415 24...240 24 110...130 220...240 380...415
voltage (Un) a V     24...240    
Average c VA 1.9 2.6 2.4 2.9 2.7 3.1 2.7 2.6 3.4
consumption at Un a W     2.4    
Output relay and operating characteristics
Number of C/O contacts 12
Output relay state Can be configured by switch: empty /fill
Electrode circuit characteristics (1)
Sensitivity scale k&! 5& 100 (adjustable) 0.25& 5 2.5& 50 25& 500
Maximum a.c. electrode V 24 24
voltage (peak to peak)
Maximum current in mA 1 111
the electrodes
Maximum cable capacity nF 10 200 25 4
Maximum cable length m 100 1000 100 20
References
Liquid level control relays
Time delay Sensitivity Width Output Basic reference. Weight
scale relay Complete with code
indicating the voltage (2)
k&! mm kg
None 5& 100 22.5 1 C/O RM4-LG01i 0.165
RM4-LG01
Adjustable 0.25 ...5 22.5 2 C/O RM4-LA32ii 0.165
0.1...10 s 2.5 ...50
25 ...500
Liquid level control probe
Type of installation Maximum operating Reference Weight
temperature
�C kg
Suspended by cable 100 LA9-RM201 0.100
RM4-LA32
(1) The electrodes may also be incorporated in the probes. The probes are normally designed for fixing to a tank by means
of a bracket with a seal (closed tanks) or suspended by their own electrical connecting cable (boreholes, etc.). See page
28475/5  Setting-up Probe LA9-RM201.
(2) Standard supply voltages
RM4-LG01 Volts 24 110...130 220...240 380...415
c 50/60 Hz B F M Q
RM4-LA32 Volts 24...240 24 110...130 220...240 380...415
c 50/60 Hz MW B F M Q
LA9-RM201
a MW    
28475/ 4
Te
Protection components
Zelio Control measurement and control relays
Liquid level control relays
Presentation:
pages 28475/2 and 28475/3
Characteristics:
Dimensions, schemes, setting-up
page 28475/4
References:
page 28475/4
Dimensions Rail mounting Screw fixing
RM4-LG01, LA32
80 22,5 89,5
82
�4
Probe LA9-RM201
150
Schemes, connection
RM4-LG01 RM4-LA32
A1 15 A1 15 25
B1 B2 B3 B1 B2 B3
A1-A2 Supply voltage Electrodes and level controlled
B1, B2, B3 Electrodes
(see table opposite) B1 Reference or tank earth
15-18 1st C/O contact electrode
15-16 of the output relay
25-28 2nd C/O contact B2 High level
28 26 25-26 of the output relay
18 16 A2 18 16 A2
B3 Low level
Setting-up
i Select the empty /fill function according to the sequence to be performed.
i If necessary, set potentiometer 1 to minimum (time delay).
i Set potentiometer 2 to minimum; on RM4-LA select the lowest sensitivity range using potentiometer 4 (5 or 5
1
).
i With all the electrodes immersed, turn the sensitivity potentiometer towards maximum until the relay is energised (
2
2
function) or de-energised ( function), then exceed the threshold by about 10 % to compensate for variation in the
R 3
R 3
supply voltage.
U
U
4
If the relay is not able to energise, a higher sensitivity scale must be used (selector 4 on RM4-LA32) or relay RM4-LG
must be replaced by an RM4-LA32 relay and the adjustment procedure must be started again.
i Then check that the relay de-energises ( function) or energises ( function) as soon as electrodes B3 and B2 are
out of the liquid. If the relay does not de-energise, select a lower sensitivity scale.
i The electrode connection point must be protected against corrosion by sticking or sealing. In areas where thunder-
RM4-LG01 RM4-LA32
storms are likely to occur, measures must also be taken to protect the electrode lines.
Note: the high level can be raised by means of the adjustable time delay from 0.1 to 10 seconds with function .
The low level can be lowered by means of this same time delay with function .
Probe LA9-RM201
2-conductor cable in This probe is of the  suspended type. It is coaxial, i.e. in addition to the normal (central) electrode, the stainless steel skirt
cylindrical sheath can also act as earth (reference) electrode, which means that there is no need to install a separate reference probe. In
(max.� 6.3 mm) this way, for controlling one level, only one probe is required instead of 2; for controlling 2 levels, only 2 probes are required
instead of 3.
The connecting cable must be of the  2-conductor type, with common cylindrical PVC sheath, having a maximum
Level electrode
diameter of 6.3 mm. The skirt also acts as a  calming chamber , so avoiding inaccuracy due to an agitated surface of the
liquid (waves).
Maximum operating temperature: 100 �C.
Reference electrode Probe LA9-RM201 can also be fixed on various containers (cisterns, tanks,...) by means of a bracket or other suitable
(skirt) fixing device.
Connection examples
Control by electrodes Control by probes
LA9-RM201
RM4-LG01
B2 B2
A1 B1 B2 B3 High
level B3 B1
B1
Low
level
A2
2 levels 1 level
28475/ 5
Te
6
78
78
6
16
B1
B2
B1
B2
16
18
15
26
28
25
16
18
15
A1
A2
B3
A1
A2
B3
B1
B2
B3
Supply voltage
Protection components
Measurement and control relays
Insulation control relays for a.c. circuits, RM3-PA101
Characteristics :
page 28301/4
References :
General
page 28312/5
Scheme, dimensions :
page 28312/6
Functions
This device monitors the presence of an insulation resistance on an a.c. circuit (with neutral insulated from earth) and
the earth connection.
Its detection threshold range is 1 to 110 k .
A fault memory is possible (automatic or manual, local or remote reset), see page 28312/6  Setting-up .
A pushbutton on the front face of the relay allows an  earth fault TEST to be performed. This test can also be performed
remotely. The LEDs on the front of the relay indicate the various states, see page 28312/6  Setting-up .
Applications on a.c. supply
3-phase supplies :
- without neutral conductor,
- with artificial neutral,
- with insulated neutral.
Single-phase supplies :
- control circuit of automation equipment,
RM3-PA101
- control circuit,
- any auxiliary control circuit galvanically isolated from the mains supply.
Presentation
Width 45 mm 1 Resistance range selector (maximum value in the range, in
k ).
Te
RM3 PA1 2 End of resistance range setting (from 1 to 11 or from 10 to
110 k ).
1
F Red LED : indicates a fault.
2
U Green LED : indicates that supply to the RM3 is on.
A1 A2
16
15 18
F
U
Operating principle
The supply voltage is connected to terminals A1-A2 or A1-B2. Its value can be identical to that of the circuit to be monitored.
L1
A continuous voltage (terminal L) is connected between one
L2
phase (or neutral if present) of the installation and earth (s
L3
terminal).
N
As soon as an earth insulation fault occurs, it causes a non
infinite resistance to appear between the installation and earth.
+
A fault current is established and this current then passes
A1 L
RM3-PA1 through the so-called  insulation resistance.

A2
When this current exceeds a value corresponding to the preset
threshold resistance, the output relay is energised with a time
delay (see curve, page 28312/6  Setting-up ) and a fault
indicator illuminates on the relay.
R1
Purpose of continuous insulation monitor RM3-PA1
The main purpose of this device is to indicate the first insulation
K1 fault in an installation in order to protect it against incorrect
R2
operation due to the appearance of a second fault.
In the diagram opposite, resistances R1 and R2, correspond-
ing to two successive insulation faults, are in series and can
K2
keep K2 energised when contact K1 is open. This incorrect
operation can have very serious consequences in some instal-
Functional diagram lations.
U supply A1-A2/B2
Reset S1/S2
Remote
Test S1/ s
On RM3 Test Reset
Insulation resistance
15-18
Relay
15-16
t t T t T
t : time delay, T : time delay Test > 1.5 s.
28312/ 2
Te
Protection components
Measurement and control relays
Insulation control relays RM3-PA1
General :
pages 28312/2 and 28312/3
References :
Characteristics
page 28312/5
Scheme, dimensions :
pages 28312/6 and 28312/7
Environment
Conforming to standards RM3-PA101 UTE 63080, DIN 0413 (part 2), VDE 0413 part 2
Supply circuit characteristics
RM3-PA101 RM3-PA102
Rated supply voltage (Un) c 50-60 Hz V 24...240 110...130 220...240 24...240
a V 24...240   24...240
Average consumption at Un c VA 4.5 2.5 2.5 5.5
a W 4.5   5.5
Output relay and operating characteristics
RM3-PA101 RM3-PA102
Number of C/O contacts 11
Output relay state Energised on detection of an Energised or de-energised on
insulation fault detection of an insulation fault,
depending on position of switch
Rated operational voltage V 400 400
(switching)
Conventional thermal current A 66
Rated breaking capacity AC-15 250 V A 33
400 V A 22
Time delay Delay on fault See curve, page 28312/6 < 1 s for R measured < 0.9 R set
Relay resetting threshold Fixed setting Approximately equal to 1.6 times the insulation resistance value set
(tripping of relay)
Operating status indication U Green LED on Supply to device on Supply to device on
F Red LED on Relay energised on detection of fault L+ : L+ s fault
L- : L- s fault
Measuring input characteristics
Current of circuit to be monitored a.c. 50/60 Hz d.c.
Voltage of circuit to be monitored Between L+ and L- V  20.4...264
Setting range k 1...11, 10...110 10...110
Minimum internal resistance c or a k 100 57
Internal test resistance 820 
Maximum insulation voltage Between L and s V 415 
Between L+ and s, L- and s V  300
Measurement voltage a V 30 maximum 
Maximum length of m 10 10
Test or Reset cable
28312/ 4
Te
Protection components
Measurement and control relays
Insulation control relays RM3-PA1
General :
pages 28312/2 and 28312/3
Characteristics :
References
page 28312/4
Scheme, dimensions :
pages 28312/6 and 28312/7
Insulation control relays
Insulation Current of Basic reference. Weight
measurement monitored Complete with code indicating
circuit control circuit voltage (1) kg
c
1...110 k c RM3-PA101iii 0.250
c
c
RM3-PA101 10...110 k a RM3-PA102iii 0.210
a
a
a
Accessory (to be ordered separately)
Description Reference Weight
kg
Sealing cover LA9-RM301 0.005
width 45 mm
LA9-RM301
(1) Standard supply voltages
RM3-PA101
Volts 24...240 110...130 or 220...240
c 50/60 Hz MW FU7
a MW 
RM3-PA102
Volts 24...240
c 50/60 Hz MW
a MW
28312/ 5
Te
Protection components
Measurement and control relays
Insulation control relays for a.c. circuits, RM3-PA101
Scheme, dimensions, setting-up
Scheme, connection
RM3-PA101
Supply voltages :
Mixed c or a
A1-A2 24...240 V Connection and values of the 2 resistance ranges to be
Dual voltage c controlled
A1-B2 110...130 V
A1-A2 220...240 V
RM3-PA101 L to
L, s Insulation measurement
(see table opposite)
S1- s Remote TEST
S1-S2 Remote Reset
15-18 C/O contact of output
15-16 relay
Dimensions
Setting-up
Fault memory
Short-circuiting of terminals S1 and S2 (see scheme opposite) allows the fault
to be memorised as soon as it appears, even if only fleetingly. The duration of
the fault must exceed the response time of the relay (see curve below) for it to
be detected. If this short-circuiting is achieved by means of a N/C pushbutton,
this acts as the remote reset button (if the fault has disappeared). Manual local
resetting is achieved by briefly pressing (less than 0.5 s) the RESET/TEST
button on the front of the relay. A1 15 S1 S2
s
P S
Test
L1
R < s
When the installation being controlled does not have an insulation fault, L2
L3
pressing the RESET/TEST button on the front of the relay and holding for more
N
than 1.5 s causes 2 simultaneous actions : 16 18 L B2 A2
- the measuring input terminal not connected to earth (L) is disconnected from
the line being controlled,
- a resistance (internal) of 820 is connected to this input in order to simulate
an insulation fault.
The relay must then react in the same way as for a real fault.
A N/O pushbutton may be connected to terminals S1 and s which will act as the
P S P S
remote test button and this will have the same effect as the built-in test button L1 L1
L2 L2
(see scheme opposite).
R k&!
is
L3 L3
Sec
1 2 4 6 10 20 40 60 100
N
3
A1 L A1 L
t
A
c c
2,5
RM3-PA1 RM3-PA1
A2 s A2 s
2
1,5
1
0,5
P S
L1
0,1 1 10 100
P S
L2
R k&!
im
L3
tA = Delay on energisation
A1 L
A1 L
Rim = Insulation resistance measured
c
c RM3-PA1
RM3-PA1 A2 s
A2 s
Ris = Insulation resistance threshold
28312/ 6
Te
L
16
18
15
220& 240 V
c/a
(FU)
110& 130 V
c/a
(FU)
Protection components
Measurement and control relays
Insulation control relays for d.c. circuits, RM3-PA102
General :
page 28312/3
Characteristics :
Scheme, dimensions, setting-up
page 28312/4
References :
page 28312/5
Scheme, connection
RM3-PA102
Supply voltages :
R <
Mixed c or a
A1-A2 24...240 V
Connection and values of the resistance ranges to be
controlled
A1 15 S1 S2 S3 S4 L+, L- s Insulation measurement
(see table opposite) RM3-PA102 L+ to s 10& 110 k
S1-S3 Remote TEST, L+ L- to s
S3-S4 Remote TEST, L-
S2-S3 Remote Reset
15-18 C/O contact of output
16 18 L+ L- A2
15-16 relay
Dimensions
100 45
Setting-up
Fault memory Basic scheme of the installation
Short-circuiting of terminals S3 and S2 allows the fault to be memorised as soon
as it appears, even if only fleetingly. If this short-circuiting is achieved by means - Separate supply to RM3
of a N/C pushbutton, this acts as the remote reset button (if the fault has
24-240 V AC
disappeared). Manual local resetting is achieved by briefly pressing (less than
+
L
AC
L
1 s) the RESET/TEST button on the front face of the relay.
L- 24-240 V DC
N
DC
Test + Test -
Test
When the installation being controlled does not have an insulation fault, the two
PE
control circuits, corresponding to each polarity, can be tested independently. Reset
( )
Testing circuit L+ s
A1 15 S1 S2 S3 S4
Pressing button 3 on the front of the relay and holding for more than 1 s causes
2 simultaneous actions :
L+L- 15
- the measuring input terminal L+ is disconnected from the line being controlled,
- an internal resistance is connected to this input in order to simulate an
R <
insulation fault.
The relay must then react in the same way as for a real fault.
A1 A2 16 18
Testing circuit L- s
Pressing button 4 on the front of the relay causes 2 simultaneous actions : 16 18 L+ L- A2
- the measuring input terminal L- is disconnected from the line being controlled,
- an internal resistance is connected to this input in order to simulate an
insulation fault.
The relay must then react in the same way as for a real fault. - Supply to RM3 from circuit being monitored
+
L
AC
L
L- 24-240 V DC
N
DC
Test + Test -
PE
Te
Reset
( )
1
Test A1 15 S1 S2 S3 S4
Reset
L+L- 15
2
A1 A2 3
Test
R <
16
4
15 18 F
6
A1 A2 16 18
U 7
16 18 L+ L- A2
5
28312/ 7
Te
+
L
16
18
15
A2
A1
L
77,5
Protection components
Measurement and control relays
Sensitive contact protection relays RM3-EA1
Characteristics :
pages 28301/2, 28301/3 and 28313/3
References :
General
page 28313/4
Sche
Functions
This device relays, protects and amplifies a low level  Discrete output. It may be used with or without memory function.
The adjustable time delay from 0.05 to 30 s avoids oscillations of the relay in the event of interference or bouncing of the
contact to be protected.
It can be controlled by a mechanical contact or by a 3-wire solid state switch (see examples, page 28313/5  Setting-up ).
Applications :
- protection,
- ensuring reliability,
- amplification of low level outputs on measuring devices, sensors, probes etc.
Presentation
RM3-EA1
Width 45 mm 1 Time delay range selector switch (0.05 to 1 s and 1.5 to
30 s).
Te
2 End of time delay setting.
RM3 EA1
R Yellow LED : indicates relay state.
1
A1 A2
16
15 18
U Green LED : indicates that supply to the RM3 is on.
2
26
25 28
R
U
Operating principle
The supply voltage is connected to terminals A1-A2.
Protection of  Discrete contacts The RM3 s output relay is energised when terminals Y1-Y2
are connected to the contact to be protected and this
contact is closed.
A1
Contact to
RM3-EA
be protected
A2
Protection of contacts with memory (latching) The RM3 s output relay is energised when terminals Y1-Y3
are connected to the contact to be protected and this
contact is closed for a time 20 ms.
It remains energised after opening of Y1-Y3.
A1
It de-energises when Y1 - Y4 are short-circuited.
RM3-EA Contact to
A2
be protected
Functional diagram
U supply A1/A2
Y1/Y2
Contact
to be Y1/Y3
protected
Y1/Y4
15-18
15-16
Relay
25-28
25-26
t t t
t : time delay
28313/2
Te
Y2
Y1
Y3
Y4
Y1
Protection components
Measurement and control relays
Sensitive contact protection relays RM3-EA1
General :
page 28313/2
References :
Characteristics
page 28313/4
Scheme, dimensions :
page 28313/5
Supply circuit characteristics
Rated supply voltage (Un) c 50-60 Hz V 24 110...130 220...240 380...415
Average consumption at Un c VA 3.4 3.4 3.4 3.4
Output relay and operating characteristics
Number of C/O contacts 2
Output relay state See diagram page 28313/2 and note (1) below
Rated operational voltage V 400
(switching)
Conventional thermal current A 5
Rated breaking capacity AC-15 230 V-3 A, 400 V-2 A
Time delay on energisation Adjustable s 0.05...30
Time delay on de-energisation ms 50
Minimum closing time for ms 20
memory (latching)
Operating status indication U Green LED on Supply to device on
R Yellow LED on Relay energised
Measuring input characteristics
Resistance Energisation guaranteed  Discrete contacts Y1-Y2 < 6.5 k
 Latching contacts Y1-Y3 < 6.5 k
De-energisation guaranteed  Discrete contacts Y1-Y2 > 19 k
 Latching contacts Y1-Y4 < 16 k
No-load voltage a current V 10
Switching current mA 3
Continuous voltage applied 3-wire control, V 30
(maximum)
a current
(1) If circuits Y1-Y3 and Y1-Y4 are closed, the output relay is energised.
The relay memory is reset to zero when the power supply is switched off.
In the event of a power failure, the relay de-energises and is re-energised at switch-on only if circuit Y1-Y3 is closed.
28313/ 3
Te
Protection components
Measurement and control relays
Sensitive contact protection relays RM3-EA1
General :
page 28313/2
Characteristics :
References
pages 28301/2, 28301/3 and 28313/3
Scheme, dimensions :
page 28313/5
Time delay Basic reference. Complete Weight
with code indicating
control circuit voltage (1)
s kg
Adjustable RM3-EA111iii 0.310
0.05...30
None RM3-EA101iii 0.310
RM3-EA1
Accessory (to be ordered separately)
Description Reference Weight
kg
Sealing cover LA9-RM301 0.005
width 45 mm
(1) Standard supply voltages
LA9-RM301
Volts 24 110...130 220...240 380...415
c 50/60 Hz B7 FG7 MU7 QN7
28313/ 4
Te
Protection components
Measurement and control relays
Sensitive contact protection relays RM3-EA1
General :
page 28313/2
Characteristics :
Scheme, dimensions, setting-up
pages 28301/2, 28301/3 and 28313/3
References :
page 28313/4
Scheme, connection
RM3-EA1
Y1
A1 15 25 Y2 Y3 Y4
A1-A2 Supply voltage
Connection and type of protection
Y1, Y2, Connection of contacts to be
Y3, Y4 monitored (see table opposite)
RM3-EA1i1 Y1-Y2 Protection of  Discrete
contact
15-18 1st C/O contact of output relay
16 18 28 26 Y1 A2
15-16
Protection of contact with
memory  Latching :
25-28 2nd C/O contact of output relay
25-26
Y1-Y3 Energisation
Y1-Y4 De-energisation
Dimensions
100 45
Setting-up
Energisation by 3-wire NPN solid state switch
On : the relay is energised (Y1-Y3).
Off : the relay is de-energised (Y1-Y4).
+ UB
Y1
NPN
Y3/ UB
Y4/ UB
Relays having two contacts with common point may be connected to two separate RM3-EA1 relays.
The common point of the contacts must be connected to terminal Y2 of each RM3-EA1.
(RM3-EA N�1)
Y2 (RM3-EA N�2)
Y1 (RM3-EA N�1)
Y1 (RM3-EA N�2)
28313/5
Te
Y2
Y3
16
26
18
15
28
25
A1
A2
Y4
77,5


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