Monitoring Relays

Monitoring relays are a type of relay that trips a circuit breaker when a fault is detected. A relay is an electrically controlled switch that is used to turn the power on or off in a circuit. 


Monitoring relays are more sophisticated than regular relays, as they have adjustable operating conditions, whereas normal relays switch according to a fixed threshold. They measure a given parameter, such as voltage or temperature, and will trip a circuit breaker when the parameter gets too high or low. 


What are monitoring relays used for?

Monitoring relays have a wide range of uses, depending largely on the factor being monitored. For example, they can protect against overcurrent if measuring current, or they can detect an abnormally low frequency if frequency is being measured.


Types of monitoring relay

The main way in which monitoring relays differ is the function that they measure. This can be a number of things, including:

  • voltage
  • current
  • temperature
  • frequency

The factor that you need to measure will decide which monitoring relay you choose.


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Beskrivning Pris Monitoring Application Supply Voltage Contact Configuration Voltage Sensitivity Electrical Phase Voltage Sensing Range Current Sensitivity Minimum Current Sensed Maximum Current Sensed Phase Sensitivity Time Delay Temperature Sensitivity Temperature Sensing Range Frequency Sensing Range
RS-artikelnummer 146-165
Tillv. art.nrRM17UAS14
VarumärkeSchneider Electric
1 151,40 kr
Each
Enheter
Voltage 12 V SPDT Overvoltage, Self Powered, Undervoltage 1 9 → 15 V dc - - - - 0.1 → 10 s - - -
RS-artikelnummer 124-0189
Tillv. art.nrRM22UA33MT
VarumärkeSchneider Electric
1 727,60 kr
Each
Enheter
Voltage 323 → 456.5 V ac DPDT Overvoltage, Undervoltage 3 15 → 500 V ac/dc - - - - 0.1 → 30 s - - -
RS-artikelnummer 146-446
Tillv. art.nrRM35TM50MW
VarumärkeSchneider Electric
1 739,88 kr
Each
Enheter
Phase, Temperature, Voltage 24 → 240 V ac/dc DPST Motor Voltage 3 208 → 480 V ac - - - Phase Failure, Phase Sequence 0.3 s Overtemperature, Undertemperature - -
RS-artikelnummer 146-238
Tillv. art.nrRM17TG20
VarumärkeSchneider Electric
673,16 kr
Each
Enheter
Phase 208 440 V ac DPDT - 3 - - - - Phase Asymmetry, Phase Failure, Phase Sequence <100 ms - - -
RS-artikelnummer 124-0184
Tillv. art.nrRM22TR33
VarumärkeSchneider Electric
1 153,30 kr
Each
Enheter
Phase, Voltage 304 → 576 V ac DPDT Overvoltage, Undervoltage 3 380 → 480 V ac - - - Phase Failure, Phase Sequence 0.1 → 30 s - - -
RS-artikelnummer 776-3648
Tillv. art.nrA9E16065
VarumärkeSchneider Electric
2 181,05 kr
Each
Enheter
Time Delay 24 V dc, 24 → 240 V ac SPDT - - 24 → 240 V ac - - - - - - - -
RS-artikelnummer 124-0193
Tillv. art.nrRM35LM33MW
VarumärkeSchneider Electric
650,30 kr
Each
Enheter
Level 20.4 → 264 V ac/dc DPDT - 1 - - - - - 0.1 → 5 s - - -
RS-artikelnummer 146-200
Tillv. art.nrRM35JA31MW
VarumärkeSchneider Electric
1 499,85 kr
Each
Enheter
Current 24 → 240 V ac/dc DPDT - - - Overcurrent, Undercurrent 2mA 500mA - 0.3 → 30 s - - -
RS-artikelnummer 776-3657
Tillv. art.nrA9E16066
VarumärkeSchneider Electric
2 181,05 kr
Each
Enheter
Time Delay 24 V dc, 24 → 240 V ac SPDT - - 24 → 240 V ac - - - - - - - -
RS-artikelnummer 146-250
Tillv. art.nrRM17TG00
VarumärkeSchneider Electric
752,70 kr
Each
Enheter
Phase 208 480 V ac SPDT - 3 - - - - Phase Asymmetry, Phase Failure, Phase Sequence <100 ms - - -
RS-artikelnummer 145-976
Tillv. art.nrRM35JA32MW
VarumärkeSchneider Electric
1 169,58 kr
Each
Enheter
Current 24 → 240 V ac/dc DPDT - - - Overcurrent, Undercurrent 0.15A 15A - 0.3 → 30 s - - -
RS-artikelnummer 124-0191
Tillv. art.nrRM35JA32MR
VarumärkeSchneider Electric
1 290,30 kr
Each
Enheter
Current 20.4 → 264 V ac/dc DPDT - 1 - Overcurrent, Undercurrent 150mA 15A - 0.1 → 30 s - - -
RS-artikelnummer 146-452
Tillv. art.nrRM17UB310
VarumärkeSchneider Electric
1 267,55 kr
Each
Enheter
Voltage 208 → 480 V ac SPDT Absence of Neutral, Overvoltage and Undervoltage Between Neutral, Overvoltage and Undervoltage Between Phase 3 183 → 528 V ac - - - - 0.3 → 30 s - - -
RS-artikelnummer 179-0019
Tillv. art.nrRMNF22TB30
VarumärkeSchneider Electric
1 238,40 kr
Each
Enheter
Frequency, Voltage with NFC 208 → 480 V ac - - 3 - - - - - - - - -
RS-artikelnummer 146-531
Tillv. art.nrRM17UBE16
VarumärkeSchneider Electric
1 383,70 kr
Each
Enheter
Voltage 24 → 48 V ac/dc SPDT Overvoltage, Self Powered, Undervoltage 1 20 → 80 V ac/dc - - - - 0.1 → 10 s - - -
RS-artikelnummer 146-143
Tillv. art.nrRM35UA12MW
VarumärkeSchneider Electric
2 184,34 kr
Each
Enheter
Voltage 24 → 240 V ac/dc DPDT Overvoltage, Undervoltage - 1 → 100 V - - - - 0.3 → 30 s - - -
RS-artikelnummer 146-070
Tillv. art.nrRM35S0MW
VarumärkeSchneider Electric
1 677,82 kr
Each
Enheter
Speed 24 → 240 V ac/dc SPDT - - - - - - - 0.6 → 60 s - - -
RS-artikelnummer 146-474
Tillv. art.nrRM35UB330
VarumärkeSchneider Electric
1 589,74 kr
Each
Enheter
Voltage 220 → 480 V ac DPDT Absence of Neutral, Overvoltage and Undervoltage Between Neutral, Overvoltage and Undervoltage Between Phase 3 194 → 528 V ac - - - - 0.3 → 30 s - - -
RS-artikelnummer 146-159
Tillv. art.nrRM17UAS16
VarumärkeSchneider Electric
1 151,40 kr
Each
Enheter
Voltage 24 → 48 V ac/dc SPDT Overvoltage, Self Powered, Undervoltage 1 20 → 80 V ac/dc - - - - 0.1 → 10 s - - -
RS-artikelnummer 146-480
Tillv. art.nrRM35TF30
VarumärkeSchneider Electric
1 392,79 kr
Each
Enheter
Phase, Voltage 220 → 480 V ac DPDT Overvoltage, Undervoltage 3 194 → 528 V ac - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 → 10 s - - -