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 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 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 850-5405
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 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 850-5409
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 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 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 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 298-9365
Tillv. art.nr45080 230/400VAC
VarumärkeBroyce Control
666,14 kr
Each
Enheter
Phase, Voltage 230 V ac, 400 V ac SPDT Undervoltage 3 Maximum of 400 V ac - - - Phase Loss, Phase Sequence 0.1 → 10 s - - -
RS-artikelnummer 850-5402
Tillv. art.nrLMCCR-2A 24-230VAC/DC
VarumärkeBroyce Control
948,37 kr
Each
Enheter
Current 24 → 230 V ac/dc SPDT - - - Overcurrent, Undercurrent 20mA 2A - 0.1 → 30 s - - -
RS-artikelnummer 135-6184
Tillv. art.nrLPRD/2 400V
VarumärkeBroyce Control
982,67 kr
Each
Enheter
Voltage 400 V DPDT - 3 243 → 540 V - - - Phase Failure, Phase Sequence 0.2 → 10 s - - -
RS-artikelnummer 298-9371
Tillv. art.nr45PTR 230VAC
VarumärkeBroyce Control
765,86 kr
Each
Enheter
Phase, Temperature 230 V ac DPST - 3 - - - - Phase Loss, Phase Sequence 15 ms Overtemperature - -
RS-artikelnummer 321-6781
Tillv. art.nr45050 110VAC
VarumärkeBroyce Control
678,88 kr
Each
Enheter
Voltage 110 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 321-6832
Tillv. art.nr45200 24VAC
VarumärkeBroyce Control
593,93 kr
Each
Enheter
Temperature 24 V ac SPDT - - - - - - - 50 ms Overtemperature - -
RS-artikelnummer 135-6187
Tillv. art.nrLCVR/2 230V
VarumärkeBroyce Control
943,95 kr
Each
Enheter
Voltage 230 V SPDT - 1 140 → 315 V - - - - 0.2 → 10 s - - -
Nytt
RS-artikelnummer 188-3543
Tillv. art.nrLTMR 100-230V AC/DC
VarumärkeBroyce Control
589,89 kr
Each
Enheter
Voltage 100 → 230 V ac/dc 1 x SPDT - - - - - - - - - - 48 → 63 Hz
RS-artikelnummer 397-9145
Tillv. art.nr70POCR 400VAC
VarumärkeBroyce Control
1 443,40 kr
Each
Enheter
Current 400 V ac DPDT - 3 - Overcurrent - 5A - 0.2 → 10 s - - -
RS-artikelnummer 538-3827
Tillv. art.nrP48TR 200-10,000 115/230VAC
VarumärkeBroyce Control
950,11 kr
Each
Enheter
Speed 115 V ac, 230 V ac SPDT - - - - - - - - - - -