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. 916-0094
FabrikantnummerPMV20A600
FabrikantLovato
115,58 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 60ms - - -
RS-stocknr. 916-0114
FabrikantnummerPMV50A575
FabrikantLovato
224,83 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 0.1 → 20s - - -
RS-stocknr. 916-0108
FabrikantnummerPMV40A575
FabrikantLovato
170,32 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 0.1 → 20s - - -
RS-stocknr. 916-0192
FabrikantnummerPMA50A480
FabrikantLovato
219,33 €
Each
Aantal stuks
Current - SPDT - 1, 3 - Overcurrent, Undercurrent 0.1A 16A - 0.1 → 10s - - -
RS-stocknr. 916-0170
FabrikantnummerPMV80NA600
FabrikantLovato
566,77 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 0.1 → 20s - - -
RS-stocknr. 916-0110
FabrikantnummerPMV50A240
FabrikantLovato
224,83 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 0.1 → 20s - - -
RS-stocknr. 916-0136
FabrikantnummerPMV55A440
FabrikantLovato
174,36 €
Each
Aantal stuks
Voltage - SPDT Self Powered 1 Maximum of 400V ac - - - - 0.1 → 20s - - -
RS-stocknr. 916-0088
FabrikantnummerPMV10A440
FabrikantLovato
88,58 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 60ms - - -
RS-stocknr. 916-0195
FabrikantnummerPMA50A240
FabrikantLovato
212,93 €
Each
Aantal stuks
Current - SPDT - 1, 3 - Overcurrent, Undercurrent 0.1A 16A - 0.1 → 10s - - -
RS-stocknr. 916-0182
FabrikantnummerPMA30240
FabrikantLovato
193,69 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent 0.25A 16A - 0.1 → 30s - - -
RS-stocknr. 916-0189
FabrikantnummerPMA20240
FabrikantLovato
168,14 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent 0.25A 16A - 0.1 → 30s - - -
RS-stocknr. 916-0164
FabrikantnummerPMV70NA600
FabrikantLovato
327,65 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 0.1 → 20s - - -
RS-stocknr. 916-0081
FabrikantnummerPMV20A240
FabrikantLovato
115,58 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 60ms - - -
RS-stocknr. 916-0132
FabrikantnummerPMV55A240
FabrikantLovato
174,36 €
Each
Aantal stuks
Voltage - SPDT Self Powered 1 Maximum of 400V ac - - - - 0.1 → 20s - - -
RS-stocknr. 916-0085
FabrikantnummerPMV20A575
FabrikantLovato
115,58 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 60ms - - -
RS-stocknr. 916-0120
FabrikantnummerPMV50NA440
FabrikantLovato
250,47 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 0.1 → 20s - - -
RS-stocknr. 916-0218
FabrikantnummerPMF20A240
FabrikantLovato
357,23 €
Each
Aantal stuks
Frequency - SPDT - 1, 3 - - - - - 0.1 → 20s - - 40 → 70Hz
RS-stocknr. 916-0091
FabrikantnummerPMV30A575
FabrikantLovato
142,94 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 0.1 → 20s - - -
RS-stocknr. 916-0186
FabrikantnummerPMA40240
FabrikantLovato
232,09 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent 1mA 16A - 0.1 → 30s - - -
RS-stocknr. 916-0126
FabrikantnummerPMV50NA240
FabrikantLovato
250,47 €
Each
Aantal stuks
Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 0.1 → 20s - - -