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 850-5360
Tillv. art.nrLXPRC/S 400V
VarumärkeBroyce Control
755,28 kr
Each
Enheter
Phase, Voltage 400 V ac SPDT Overvoltage, Undervoltage - 300 380 (Under) V, 420 500 (Over) V - - - Phase Failure, Phase Sequence 0.2 10 s - - -
RS-artikelnummer 629-386
Tillv. art.nrM3PPI 300-500vAC
VarumärkeBroyce Control
505,10 kr
Each
Enheter
Phase 300 500 V ac - - 3 - - - - Phase Loss, Phase Sequence - - - -
RS-artikelnummer 397-9139
Tillv. art.nr45TCR 24/230VAC
VarumärkeBroyce Control
1 268,91 kr
Each
Enheter
Temperature 24/230 V ac - - - - - - - - 200 ms - -50 +300°C -50 50 °C, 0 100 °C, 0 50 °C, 100 200 °C, 200 300 °C
RS-artikelnummer 850-5411
Tillv. art.nrLBVR/A 12-24VDC
VarumärkeBroyce Control
538,69 kr
Each
Enheter
Voltage 8 30 V dc SPDT Undervoltage - 12 24 V dc - - - - 0 30 s - - -
RS-artikelnummer 299-1914
Tillv. art.nr45150 230VAC
VarumärkeBroyce Control
825,55 kr
Each
Enheter
Current 230 V ac SPDT - 1 - Overcurrent 5mA 1A - 0.1 3 s - - -
RS-artikelnummer 321-6797
Tillv. art.nr45050 24VAC
VarumärkeBroyce Control
770,22 kr
Each
Enheter
Voltage 24 V ac SPDT Overvoltage 1 0.5 10 V ac/dc, 3 60 V ac/dc, 30 600 V ac/dc - - - - 0.1 3 s - - -
RS-artikelnummer 850-5405
Tillv. art.nrLMCVR-500V 24-230VAC/DC
VarumärkeBroyce Control
948,37 kr
Each
Enheter
Voltage 24 230 V ac/dc SPDT Overvoltage, Undervoltage - 2 20 V, 5 50 V, 10 100 V, 20 200 V, 50 500 V - - - - 0.1 30 s - - -
RS-artikelnummer 361-1619
Tillv. art.nr45051 24/115/230VAC
VarumärkeBroyce Control
750,98 kr
Each
Enheter
Voltage 24 V ac, 115 V ac, 230 V ac SPDT Overvoltage, Undervoltage 1 Maximum of 230 V ac - - - - 0.1 10 s - - -
RS-artikelnummer 850-5409
Tillv. art.nrLMCVR-20V 24-230VAC/DC
VarumärkeBroyce Control
948,37 kr
Each
Enheter
Voltage 24 230 V ac/dc SPDT Overvoltage, Undervoltage - 0.1 1 V, 0.2 2 V, 0.5 5 V, 1 10 V, 2 20 V - - - - 0.1 30 s - - -
RS-artikelnummer 850-5382
Tillv. art.nrLXPRF 280-520VAC
VarumärkeBroyce Control
601,53 kr
Each
Enheter
Phase, Voltage 280 520 V ac SPDT Undervoltage - Maximum of 520 V - - - Phase Failure 100 ms - - -
RS-artikelnummer 135-6181
Tillv. art.nrLPRC/2 400V
VarumärkeBroyce Control
982,67 kr
Each
Enheter
Voltage 400 V SPDT - 3 243 → 540 V - - - Phase Failure, Phase Sequence 0.2 → 10 s - - -
RS-artikelnummer 135-6182
Tillv. art.nrLPMP/2 400V
VarumärkeBroyce Control
982,67 kr
Each
Enheter
Phase, Voltage 400 V DPDT - 3 243 540 V - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.2 10 s - - -
RS-artikelnummer 850-5364
Tillv. art.nrLXPRC/S-4W 230V (400V)
VarumärkeBroyce Control
825,33 kr
Each
Enheter
Phase, Voltage 230 V ac SPDT Overvoltage, Undervoltage - 173 218 (Under) V, 242 288 (Over) V - - - Phase Failure, Phase Sequence 0.2 10 s - - -
RS-artikelnummer 321-6775
Tillv. art.nr45150 24VAC
VarumärkeBroyce Control
825,55 kr
Each
Enheter
Current 24 V ac SPDT - 1 - Overcurrent 5mA 10A - 0.1 3 s - - -
RS-artikelnummer 397-9202
Tillv. art.nr45PUVR-4W 400VAC
VarumärkeBroyce Control
759,19 kr
Each
Enheter
Phase, Voltage 400 V ac DPDT Undervoltage 3 Maximum of 400 V ac - - - Neutral Loss, Phase Loss 200 ms - - -
RS-artikelnummer 850-5418
Tillv. art.nrLMWVR 12-240V AC/DC
VarumärkeBroyce Control
948,37 kr
Each
Enheter
Voltage 24 230 V ac/dc SPDT Overvoltage, Undervoltage - 12 240 V - - - - 0.1 30 s - - -
RS-artikelnummer 188-3544
Tillv. art.nrLR44/3 100-230V AC/DC
VarumärkeBroyce Control
626,06 kr
Each
Enheter
Voltage 100 230 V ac/dc 3 x SPNO - - - - - - - 1 s - - 48 63 Hz
RS-artikelnummer 321-6810
Tillv. art.nr45PTR 400VAC
VarumärkeBroyce Control
765,86 kr
Each
Enheter
Phase, Temperature 400 V ac DPST - 3 - - - - Phase Loss, Phase Sequence 15 ms Overtemperature - -
RS-artikelnummer 188-3545
Tillv. art.nrLR44/2 100-230V AC/DC
VarumärkeBroyce Control
589,89 kr
Each
Enheter
Voltage 100 230 V ac/dc 2 x SPNO - - - - - - - 1 s - - 48 63 Hz
RS-artikelnummer 850-5389
Tillv. art.nrLXPRT-4W 230V (400V)
VarumärkeBroyce Control
604,23 kr
Each
Enheter
Phase, Voltage 230 V ac SPDT Undervoltage - Maximum of 300 V - - - Phase Failure, Phase Sequence 0.2 10 s - - -