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Phase Failure Relays

RM4U (Single Phase) RM4T (Three Phase)


Output Relay and Operating Specifications
Type of Relay
RM4TG
RM4TU
RM4TR
RM4TA
RM4UB
Number of SPDT (C/O) Contacts
2 C/O  
DPDT  
2 C/O  
DPDT  
2 C/O  
DPDT  
RM4TA3 2 C/O  
DPDT  
RM4TA0 1C/O  
SPDT  
2 C/O  
DPDT  
Output Relay State
Energized during fault free
operation. De-energized or
unable to energize on
detection of phase reversal
fault or failure of one or
more phases.
Energized during fault free
operation. De-energized
on detection of under
voltage or phase reversal
fault or failure of one or
more phases.
Energized during fault free
operation. De-energized
on detection of over
voltage, undervoltage or
phase reversal fault or
phase failure.
Energized during fault free
operation. De-energized
on detection of phase
imbalance fault, phase
failure or phase reversal
fault.
Energized during fault free
operation. De-energized
on detection of an over
voltage or undervoltage
fault.
Accuracy of the Switching Threshold Setting
As % of the set value
. . .  
± 3 %
± 3 %
± 3 %
± 3 %
Switching Threshold Drift
Depending on the permissible ambient temperature
. . .  
≤ 0.06 % per degree centigrade
≤ 0.06 % per degree centigrade
≤ 0.06 % per degree centigrade
≤ 0.06 % per degree centigrade
Within the supply measuring range
. . .  
≤ 0.5 %
≤ 0.5 %
≤ 0.5 %
≤ 0.5 %
Accuracy of the Time Delay Setting
As % of the full scale value: ± 10 %
. . .  
± 10 %
± 10 %
± 10 %
± 10 %
Time Delay Drift
. . .  
. . .  
≤ 0.5 %
≤ 0.5 %
≤ 0.5 %
≤ 0.5 %
. . .  
≤ 0.07 % per degree centigrade
≤ 0.07 % per degree centigrade
≤ 0.07 % per degree centigrade
≤ 0.07 % per degree centigrade
Hysteresis
Fixed
. . .  
About 5 % of the
de-energization threshold
About 5 % of the
de-energization threshold
About 5 % of the
de-energization threshold
About 5 % of the
de-energization threshold
Measuring Cycle
≤ 80 ms  
≤ 80 ms
≤ 80 ms
≤ 80 ms
≤ 80 ms


Measuring Input Specifications
Minimum Operation Voltage a
L1 L2
or
L2 L3
or
L1 L3
140 V
RM4TU01: 160 V
RM4TR31,
RM4TR33: 160 V
RM4TA01,
RM4TA31: 160 V
RM4UB34: 60 V
RM4UB35: 160 V
RM4TU02: 290 V
RM4TR32,
RM4TR34: 290 V
RM4TA02,
RM4TA32: 290 V
Maximum Permissible Voltage Between Phases
L1 L2 L3
580 V
RM4TU01: 300 V
RM4TR31,
RM4TR33: 300 V
RM4TA01,
RM4TA31: 300 V
RM4UB34: 300 V
RM4UB35: 300 V
RM4TU02: 580 V
RM4TR32,
RM4TR34: 580 V
RM4TA02,
RM4TA32: 580 V

a Minimum voltage required for operation of indicators and of the time delay.

Relays with Adjustable Thresholds (Single Phase)
Adjustable
Time Delay
Rated Mains Supply Voltage b
Control Threshold
Width
IN
Width
mm
Output Relay
Catalog Number
Price
0.1-10 seconds  
100-200 V  
50/60 Hz  
Undervoltage  
80-120 V  
Overvoltage  
160-220 V  
0.89  
22.5  
2 C/O  
DPDT  
RM4UB34
$362.  
180-270 V  
50/60 Hz  
Undervoltage  
160-220 V  
Overvoltage  
220-300 V  
0.89  
22.5  
2 C/O  
DPDT  
RM4UB35
362.  

b Can be used on other supply voltages provided that the minimum operational voltages, maximum voltage between phases and compatibility are within the control threshold ranges supplied in the table above.

For additional information, reference Catalog #8430CT0001R6/02.



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