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. 857-7696
FabrikantnummerDPB01CM48
FabrikantCarlo Gavazzi
€ 233,91
Each
Aantal stuks
Phase, Voltage 380 → 480 V ac SPDT Overvoltage, Undervoltage 3, 3+N 323 → 550 V ac - - - Phase Loss, Phase Sequence 1 s, 6 s - - -
RS-stocknr. 857-7416
FabrikantnummerPPA01CM44
FabrikantCarlo Gavazzi
€ 109,66
Each
Aantal stuks
Phase, Voltage 208 → 480 V ac SPDT - 3 177 → 475 V ac - - - Phase Loss, Phase Sequence - - - -
RS-stocknr. 727-1256
FabrikantnummerPUA01CB23500V
FabrikantCarlo Gavazzi
€ 66,10
Each
Aantal stuks
Current, Voltage 115/230 V ac SPDT Overvoltage - 0.4 → 500 V ac, 2 → 500 V dc Overcurrent - - - <300 ms - - -
RS-stocknr. 857-7075
FabrikantnummerDIA53S72420A
FabrikantCarlo Gavazzi
€ 51,10
Each
Aantal stuks
Current - SPST - 1 - Overcurrent - - - <300 ms - - -
RS-stocknr. 857-7662
FabrikantnummerDPA51CM44
FabrikantCarlo Gavazzi
€ 158,50
Each
Aantal stuks
Phase 208 → 480 V ac SPDT - 3 177 → 550 V ac - - - Phase Loss, Phase Sequence - - - -
RS-stocknr. 857-7426
FabrikantnummerDPC01DM48
FabrikantCarlo Gavazzi
€ 322,34
Each
Aantal stuks
Phase, Voltage 380 → 480 V ac SPDT Overvoltage, Undervoltage 3, 3+N 323 → 550 V ac - - - Asymmetry, Phase Loss, Phase Sequence, Tolerance 1 s, 6 s - - 50 → 60 Hz
RS-stocknr. 857-7182
FabrikantnummerDIB01CB235A
FabrikantCarlo Gavazzi
€ 175,57
Each
Aantal stuks
Current 115/230 V ac SPDT - 1 - Overcurrent, Undercurrent - - - 1 s, 6 s - - -
RS-stocknr. 857-7527
FabrikantnummerDIB01CB23500MA
FabrikantCarlo Gavazzi
€ 175,57
Each
Aantal stuks
Current 115/230 V ac SPDT - 1 - Overcurrent, Undercurrent - - - 1 s, 6 s - - -
RS-stocknr. 857-7680
FabrikantnummerDPA01CM44
FabrikantCarlo Gavazzi
€ 131,07
Each
Aantal stuks
Phase, Voltage 208 → 480 V ac SPDT - 3 177 → 550 V ac - - - Phase Loss, Phase Sequence - - - -
RS-stocknr. 859-3285
FabrikantnummerPPB01CM48
FabrikantCarlo Gavazzi
€ 207,55
Each
Aantal stuks
Phase, Voltage 380 → 415 V ac SPDT Overvoltage, Undervoltage 3, 3+N 323 → 475 V ac - - - Phase Loss, Phase Sequence 1 s, 6 s - - -
RS-stocknr. 859-3027
FabrikantnummerDUA52C724
FabrikantCarlo Gavazzi
€ 114,49
Each
Aantal stuks
Voltage 12 → 24 V dc SPDT Undervoltage - 8 → 28 V dc - - - - <200 ms - - -
RS-stocknr. 857-7700
FabrikantnummerDPC01DM69
FabrikantCarlo Gavazzi
€ 322,34
Each
Aantal stuks
Phase, Voltage 600 → 690 V ac SPDT Overvoltage, Undervoltage 3, 3+N 510 → 793 V ac - - - Asymmetry, Phase Loss, Phase Sequence, Tolerance 1 s, 6 s - - 50 → 60 Hz
RS-stocknr. 857-7167
FabrikantnummerDUA01CB23500V
FabrikantCarlo Gavazzi
€ 118,76
Each
Aantal stuks
Current, Voltage 115/230 V ac SPDT Overvoltage 1 0.4 → 4 V ac, 2 → 20 V ac/dc, 5 → 50 V ac/dc, 20 → 200 V ac/dc, 50 → 500 V ac/dc Overcurrent - - - - - - -
RS-stocknr. 859-3070
FabrikantnummerDIB01CD485A
FabrikantCarlo Gavazzi
€ 176,23
Each
Aantal stuks
Current 24 → 48 V ac/dc SPDT - 1 - Overcurrent, Undercurrent - - - 1 s, 6 s - - -
RS-stocknr. 857-7905
FabrikantnummerDUB01CD48500V
FabrikantCarlo Gavazzi
€ 172,06
Each
Aantal stuks
Voltage 24 → 48 V ac/dc SPDT Overvoltage, Undervoltage 1 2 → 500 V ac/dc - - - - 1 s, 6 s - - -
RS-stocknr. 859-3080
FabrikantnummerDWA01CM485A
FabrikantCarlo Gavazzi
€ 197,44
Each
Aantal stuks
Power Factor Cosf 380 → 480 V ac SPDT - 3 - - - - - 1 s, 2 s, 6 s - - -
RS-stocknr. 859-3077
FabrikantnummerDFB01CM24
FabrikantCarlo Gavazzi
€ 254,72
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 857-7703
FabrikantnummerDIB01CM24100A
FabrikantCarlo Gavazzi
€ 276,02
Each
Aantal stuks
Current 24 V dc, 24 → 240 V ac SPDT - 1 - Overcurrent - - - 1 s, 6 s - - -
RS-stocknr. 165-1484
FabrikantnummerDPD02DM44
FabrikantCarlo Gavazzi
€ 141,59
Each
Aantal stuks
Frequency, Phase, Voltage 166 → 576 V SPDT - 3 102 → 318 V ac, 177 → 552 V ac - - - Phase Loss, Phase Presence, Phase Sequence 60 s - - 45 → 440 Hz
RS-stocknr. 857-7185
FabrikantnummerPIB02CB23150MV
FabrikantCarlo Gavazzi
€ 154,59
Each
Aantal stuks
Current 115/230 V ac SPDT - 1 0.4 → 4 V ac, 6 → 150 mV ac/dc Overcurrent, Undercurrent - - - 1 s, 6 s - - -