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. 102-6130
FabrikantRS PRO
47,34 €
Each
Aantal stuks
Voltage - SPDT Undervoltage - 12 → 24V dc - - - - 0 → 30s - - -
RS-stocknr. 102-6133
FabrikantRS PRO
93,50 €
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage - - - - - - 0.1 → 30s - - 48 → 63Hz
RS-stocknr. 102-6131
FabrikantRS PRO
53,30 €
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage - - - - - - 0.2 → 10s - - 48 → 63Hz
RS-stocknr. 102-6134
FabrikantRS PRO
93,50 €
Each
Aantal stuks
Current - SPDT - - - Overcurrent, Undercurrent 1A 10A - 0.1 → 30s - - 48 → 63Hz
RS-stocknr. 102-6135
FabrikantRS PRO
50,69 €
Each
Aantal stuks
Phase, Voltage - SPDT Undervoltage - - - - - Phase Failure, Phase Sequence 100ms - - 48 → 63Hz
RS-stocknr. 102-6137
FabrikantRS PRO
68,59 €
Each
Aantal stuks
Phase, Voltage - SPDT Overvoltage, Undervoltage - - - - - Phase Failure, Phase Sequence 0.2 → 10s - - 48 → 63Hz
RS-stocknr. 102-6136
FabrikantRS PRO
53,30 €
Each
Aantal stuks
Phase, Voltage - SPDT Undervoltage - - - - - Phase Failure, Phase Sequence 0.2 → 10s - - 48 → 63Hz
RS-stocknr. 131-791
Fabrikantnummer265574 & Z-TN230/SS
FabrikantEaton
52,71 €
Each
Aantal stuks
- - DPST - - - - - - - - - - 50Hz
RS-stocknr. 298-9416
Fabrikantnummer45175 230VAC
FabrikantBroyce Control
72,09 €
Each
Aantal stuks
Speed - SPDT - - - - - - - 0.5 → 30 min, 0.5 → 30s - - -
RS-stocknr. 124-0193
FabrikantnummerRM35LM33MW
56,52 €
Each
Aantal stuks
Level - DPDT - - - - - - - 0.1 → 5s - - -
RS-stocknr. 240-9320
FabrikantnummerBA9053/410 AC1A/5A/10A AC230V 0-20S
FabrikantDold
226,24 €
Each
Aantal stuks
Current 230 V ac SPDT - - - - 0.1A 10A - 0.5 → 5 s - - -
RS-stocknr. 240-8939
FabrikantnummerBA9043 3AC50-400Hz 230/400V
FabrikantDold
218,42 €
Each
Aantal stuks
Voltage - DPDT Undervoltage - - - - - - - - - -
RS-stocknr. 857-7662
FabrikantnummerDPA51CM44
FabrikantCarlo Gavazzi
161,67 €
Each
Aantal stuks
Phase - SPDT - - 177 → 550V ac - - - Phase Loss, Phase Sequence - - - -
RS-stocknr. 857-7075
FabrikantnummerDIA53S72420A
FabrikantCarlo Gavazzi
52,12 €
Each
Aantal stuks
Current - SPST - - - Overcurrent - - - <300ms - - -
RS-stocknr. 518-7174
Fabrikantnummer3UG4615-1CR20
FabrikantSiemens
190,80 €
Each
Aantal stuks
Phase, Voltage - DPDT Overvoltage, Undervoltage - 160 → 690V ac - - - Phase Failure, Phase Sequence 0.1 → 20s - - -
RS-stocknr. 518-7297
Fabrikantnummer3UG4513-1BR20
FabrikantSiemens
131,40 €
Each
Aantal stuks
Phase, Voltage - DPDT Undervoltage - 160 → 690V ac - - - Phase Failure, Phase Imbalance, Phase Sequence 0.1 → 20s - - -
RS-stocknr. 857-7905
FabrikantnummerDUB01CD48500V
FabrikantCarlo Gavazzi
175,50 €
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage - 2 → 500V ac/dc - - - - 1 s, 6s - - -
RS-stocknr. 850-5411
FabrikantnummerLBVR/A 12-24VDC
FabrikantBroyce Control
59,48 €
Each
Aantal stuks
Voltage - SPDT Undervoltage - 12 → 24V dc - - - - 0 → 30s - - -
RS-stocknr. 146-480
FabrikantnummerRM35TF30
130,86 €
Each
Aantal stuks
Phase, Voltage - DPDT Overvoltage, Undervoltage - 194 → 528V ac - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 → 10s - - -
RS-stocknr. 819-3254
FabrikantnummerK8AKPH1200500VAC
FabrikantOmron
51,39 €
Each
Aantal stuks
Phase - DPDT - - - - - - Phase Loss, Phase Sequence 0.1s - - -