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. 111-3123
FabrikantnummerK8DT-LS1CA
FabrikantOmron
47,87 €
Each
Aantal stuks
Resistance - SPDT - 3 - - - - - 0.1 → 10s - - -
RS-stocknr. 146-200
FabrikantnummerRM35JA31MW
141,71 €
Each
Aantal stuks
Current - DPDT - - - Overcurrent, Undercurrent 2mA 500mA - 0.3 → 30s - - -
RS-stocknr. 819-3273
FabrikantnummerK8AK-TH11S 100-240VAC
FabrikantOmron
103,14 €
Each
Aantal stuks
Temperature - SPDT - - - - - - - 100ms Overtemperature 0 → 999°C -
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. 358-6951
FabrikantnummerIK9178 3AC50/60Hz 400V
FabrikantDold
54,48 €
Each
Aantal stuks
Phase - - - - - - - - Phase Sequence - - - -
RS-stocknr. 614-9397
Fabrikantnummer84871130
FabrikantCrouzet
119,65 €
Each
Aantal stuks
Current - DPDT - 3 - Overcurrent, Undercurrent 0.1A 10A - 0.1 → 3s - - -
RS-stocknr. 857-7280
FabrikantnummerDWB01CM4810A
FabrikantCarlo Gavazzi
250,35 €
Each
Aantal stuks
Power Factor - SPDT - 3 - - - 5 A, 10A - 1 → 30s - - -
RS-stocknr. 776-3663
FabrikantnummerA9E16070
246,87 €
Each
Aantal stuks
Time Delay - SPDT - - 24 → 240V ac - - - - - - - -
RS-stocknr. 859-3070
FabrikantnummerDIB01CD485A
FabrikantCarlo Gavazzi
179,75 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent, Undercurrent - - - 1 s, 6s - - -
RS-stocknr. 146-591
FabrikantnummerRM17TA00
136,08 €
Each
Aantal stuks
Phase - SPDT - 3 - - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 → 10s - - -
RS-stocknr. 609-8081
FabrikantnummerLT3SM00MW
223,90 €
Each
Aantal stuks
Temperature - DPDT - - - - - - - - Overtemperature, Undertemperature - -
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. 876-5023
Fabrikantnummer1SVR730712R1400 CM-MSS.31S
FabrikantABB
158,00 €
Each
Aantal stuks
Temperature - SPDT - - - - - - - <100ms Overtemperature, Winding Temperature - -
RS-stocknr. 758-6920
Fabrikantnummer3UG4511-1AN20
FabrikantSiemens
89,73 €
Each
Aantal stuks
Phase - SPDT - - 160 → 260V ac - - - Phase Sequence - - - -
RS-stocknr. 876-5033
Fabrikantnummer1SVR730712R2200 CM-MSS.33S
FabrikantABB
94,90 €
Each
Aantal stuks
Temperature - DPDT - 1 - - - - - <100ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-5109
Fabrikantnummer716408
FabrikantF Lutze Ltd
59,12 €
Each
Aantal stuks
- - - - - - Overcurrent 1A 5A - - - - -
RS-stocknr. 123-9723
FabrikantnummerV2IM10AL10
FabrikantTele
104,63 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent, Undercurrent - - - 0.1 → 10 s, 300ms - - -
RS-stocknr. 123-9721
FabrikantnummerV2TF01
FabrikantTele
51,78 €
Each
Aantal stuks
Temperature - SPST - 1 - - - - - 50ms Overtemperature - -
RS-stocknr. 758-6927
Fabrikantnummer3UG4501-1AW30
FabrikantSiemens
101,70 €
Each
Aantal stuks
- - SPDT - - - - - - - 0.3 → 10s - - -
RS-stocknr. 111-3135
FabrikantnummerK8DT-PH1CN
FabrikantOmron
45,50 €
Each
Aantal stuks
Phase - SPDT - 3 - - - - Phase Loss, Phase Sequence - - - -