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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Omschrijving Prijs 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-stocknr. 837-7490
Fabrikantnummer84873029
FabrikantCrouzet
€ 74,85
Each
Aantal stuks
Phase, Voltage - SPDT Overvoltage 3 183 → 528V ac - - - Phase Failure, Phase Sequence ≤650ms - - -
RS-stocknr. 261-909
Fabrikantnummer84873021
FabrikantCrouzet
€ 83,93
Each
Aantal stuks
Phase - DPDT - 3 - - - - Phase Failure, Phase Sequence 500ms - - -
RS-stocknr. 261-959
Fabrikantnummer84871122
FabrikantCrouzet
€ 101,27
Each
Aantal stuks
Current - SP-NO/NC - - - Overcurrent, Undercurrent 2A 20A - 500ms - - -
RS-stocknr. 614-9432
Fabrikantnummer84872141
FabrikantCrouzet
€ 100,93
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage 1 20 → 80V ac/dc - - - - 0.1 → 10s - - -
RS-stocknr. 262-003
Fabrikantnummer84873026
FabrikantCrouzet
€ 159,88
Each
Aantal stuks
Phase, Voltage - DPDT Overvoltage, Undervoltage 3 - - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 → 10s - - -
RS-stocknr. 261-993
Fabrikantnummer84874320
FabrikantCrouzet
€ 140,76
Each
Aantal stuks
Speed - SP-NO/NC - - - - - - - 15ms - - -
RS-stocknr. 614-9404
Fabrikantnummer84872120
FabrikantCrouzet
€ 113,78
Each
Aantal stuks
Voltage - DPDT Overvoltage, Undervoltage - - - - - - 0.1 → 3s - - -
RS-stocknr. 614-9347
Fabrikantnummer84870700
FabrikantCrouzet
€ 77,74
Each
Aantal stuks
Level Control - DPDT - - 24 → 240V ac - 10mA 5A - 0.1 → 5s - - 50 → 60Hz
RS-stocknr. 837-7496
Fabrikantnummer84870200
FabrikantCrouzet
€ 65,46
Each
Aantal stuks
Level Control - SPDT - - - - - - - 0.1 → 5s - - -
RS-stocknr. 261-915
Fabrikantnummer84873022
FabrikantCrouzet
€ 83,93
Each
Aantal stuks
Phase - SPDT - 3 - - - - Phase Failure, Phase Sequence 0.1 → 10s - - -
RS-stocknr. 614-9397
Fabrikantnummer84871130
FabrikantCrouzet
€ 119,65
Each
Aantal stuks
Current - DPDT - 3 - Overcurrent, Undercurrent 0.1A 10A - 0.1 → 3s - - -
RS-stocknr. 262-126
Fabrikantnummer84873222
FabrikantCrouzet
€ 121,55
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage 3 183 → 528V ac - - - - 0.3 → 30s - - -
RS-stocknr. 614-9410
Fabrikantnummer84872130
FabrikantCrouzet
€ 116,71
Each
Aantal stuks
Voltage - DPDT Overvoltage, Undervoltage - - - - - - 0.1 → 3s - - -
RS-stocknr. 614-9375
Fabrikantnummer84871120
FabrikantCrouzet
€ 119,65
Each
Aantal stuks
Current - 2NO/2NC - 3 - Overcurrent, Undercurrent 2mA 500mA - 0.1 → 3s - - -
RS-stocknr. 463-3402
Fabrikantnummer84871030
FabrikantCrouzet
€ 144,44
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent, Undercurrent 0.1A 10A - 0.1 → 3s - - -
RS-stocknr. 262-211
Fabrikantnummer84872152
FabrikantCrouzet
€ 104,42
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage 1 65 → 260V ac/dc - - - - 0.1 → 10s - - -
RS-stocknr. 463-3418
Fabrikantnummer84871033
FabrikantCrouzet
€ 158,86
Each
Aantal stuks
Current 120 V ac SPDT - - - Overcurrent, Undercurrent 0.1A 10A - 0.1 → 3 s - - -
RS-stocknr. 614-9454
Fabrikantnummer84872151
FabrikantCrouzet
€ 106,38
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage 1 20 → 80V ac/dc - - - - 0.1 → 10s - - -
RS-stocknr. 463-3468
Fabrikantnummer84872023
FabrikantCrouzet
€ 147,86
Each
Aantal stuks
Voltage - SPDT - 1 - - - - - 0.1 → 3s - - -
RS-stocknr. 463-3474
Fabrikantnummer84872030
FabrikantCrouzet
€ 140,56
Each
Aantal stuks
Voltage - SPDT - 1 - - - - - 0.1 → 3s - - -