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. 876-5023
Fabrikantnummer1SVR730712R1400 CM-MSS.31S
FabrikantABB
158,00 €
Each
Aantal stuks
Temperature - SPDT - - - - - - - <100ms Overtemperature, Winding Temperature - -
RS-stocknr. 819-3251
FabrikantnummerK8AKPA2380480VAC
FabrikantOmron
87,43 €
Each
Aantal stuks
Phase - SPDT - 3 - - - - Phase Asymmetry, Phase Loss, Phase Sequence 0.1 → 30s - - -
RS-stocknr. 819-3214
FabrikantnummerK8AK-AS3 24VAC/DC
FabrikantOmron
71,94 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent, Undercurrent 10A 200A - - - - -
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. 859-3080
FabrikantnummerDWA01CM485A
FabrikantCarlo Gavazzi
201,39 €
Each
Aantal stuks
Power Factor Cosf - SPDT - 3 - - - - - 1 s, 2 s, 6s - - -
RS-stocknr. 859-3070
FabrikantnummerDIB01CD485A
FabrikantCarlo Gavazzi
179,75 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent, Undercurrent - - - 1 s, 6s - - -
RS-stocknr. 299-1914
Fabrikantnummer45150 230VAC
FabrikantBroyce Control
98,21 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent 5mA 1A - 0.1 → 3s - - -
RS-stocknr. 614-9397
Fabrikantnummer84871130
FabrikantCrouzet
119,65 €
Each
Aantal stuks
Current - DPDT - 3 - Overcurrent, Undercurrent 0.1A 10A - 0.1 → 3s - - -
RS-stocknr. 123-9721
FabrikantnummerV2TF01
FabrikantTele
51,78 €
Each
Aantal stuks
Temperature - SPST - 1 - - - - - 50ms Overtemperature - -
RS-stocknr. 876-5768
Fabrikantnummer1SVR730740R0300 CM-TCS.13S
FabrikantABB
287,00 €
Each
Aantal stuks
Temperature - SPDT - 3 - - - - - 20ms Overtemperature, Temperature Window Monitoring, Undertemperature 0 → +200°C 13.5 → 440Hz
RS-stocknr. 819-3273
FabrikantnummerK8AK-TH11S 100-240VAC
FabrikantOmron
103,14 €
Each
Aantal stuks
Temperature - SPDT - - - - - - - 100ms Overtemperature 0 → 999°C -
RS-stocknr. 876-5033
Fabrikantnummer1SVR730712R2200 CM-MSS.33S
FabrikantABB
94,90 €
Each
Aantal stuks
Temperature - DPDT - 1 - - - - - <100ms Overtemperature, Winding Temperature - -
RS-stocknr. 656-6180
FabrikantnummerIN9017/100 0-10V AC230V 300W
FabrikantDold
258,54 €
Each
Aantal stuks
Phase - - - - - - - - - 200ms - - -
RS-stocknr. 123-9723
FabrikantnummerV2IM10AL10
FabrikantTele
104,63 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent, Undercurrent - - - 0.1 → 10 s, 300ms - - -
RS-stocknr. 146-474
FabrikantnummerRM35UB330
149,90 €
Each
Aantal stuks
Voltage - DPDT Absence of Neutral, Overvoltage and Undervoltage Between Neutral, Overvoltage and Undervoltage Between Phase 3 194 → 528V ac - - - - 0.3 → 30s - - -
RS-stocknr. 146-597
FabrikantnummerRM17TU00
70,25 €
Each
Aantal stuks
Phase, Voltage - SPDT Undervoltage 3 183 → 528V ac - - - Phase Failure, Phase Sequence 0.1 → 10s - - -
RS-stocknr. 123-9722
FabrikantnummerV2UM230V10
FabrikantTele
91,42 €
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage 1 Maximum of 230 V ac/dc, Maximum of 24V dc - - - - 0.1 → 10s, 300 ms - - -
RS-stocknr. 123-9719
FabrikantnummerE3PF400VSY02
FabrikantTele
116,62 €
Each
Aantal stuks
Phase, Voltage - DPDT Self Powered 3 - - - - Phase Failure, Phase Sequence 100ms - - -
RS-stocknr. 776-3650
FabrikantnummerA9E16068
152,49 €
Each
Aantal stuks
Time Delay - SPDT - - 24 → 240V ac - - - - - - - -
RS-stocknr. 876-5109
Fabrikantnummer716408
FabrikantF Lutze Ltd
59,12 €
Each
Aantal stuks
- - - - - - Overcurrent 1A 5A - - - - -