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. 131-791
Fabrikantnummer265574 & Z-TN230/SS
FabrikantEaton
€ 52,71
Each
Aantal stuks
- - DPST - - - - - - - - - - 50Hz
RS-stocknr. 102-6140
Fabrikantnummer106944
FabrikantEaton
€ 196,52
Each
Aantal stuks
Current - DPDT - 1 - Overcurrent, Undercurrent - - - 0.1 → 30s - - -
RS-stocknr. 179-3527
Fabrikantnummer184761 & EMR6-A300-C-1
FabrikantEaton
€ 161,50
Each
Aantal stuks
Phase, Voltage - - - - 160 → 300V ac - - - - 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 179-3528
Fabrikantnummer184762 & EMR6-A500-D-1
FabrikantEaton
€ 143,65
Each
Aantal stuks
Phase, Voltage - - - - 300 → 500V ac - - - - 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 179-3544
Fabrikantnummer184777 & EMR6-W380-L-1
FabrikantEaton
€ 140,25
Each
Aantal stuks
Phase, Voltage - - - - - - - - - 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 179-3537
Fabrikantnummer184771 & EMR6-AWN500-D-1
FabrikantEaton
€ 204,00
Each
Aantal stuks
Phase, Voltage - - - - 300 → 500V ac - - - - 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 179-3529
Fabrikantnummer184763 & EMR6-AW300-C-1
FabrikantEaton
€ 175,10
Each
Aantal stuks
Phase, Voltage - - - - 160 → 300V ac - - - - 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 179-3541
Fabrikantnummer184774 & EMR6-R400-A-2
FabrikantEaton
€ 469,20
Each
Aantal stuks
Insulation - - - - 0 → 400V ac - - - - - - - -
RS-stocknr. 179-3518
Fabrikantnummer184790 & EMR6-I1-A-1
FabrikantEaton
€ 183,60
Each
Aantal stuks
Current - - - 1 - - 0.003 A, 0.01 A, 0.1A 0.03 A, 0.1 A, 1A - 0.1 → 30s - - -
RS-stocknr. 179-3516
Fabrikantnummer184789 & EMR6-F500-G-1
FabrikantEaton
€ 90,95
Each
Aantal stuks
Phase, Voltage - - - - 200 → 500V ac - - - - - - - 50 → 60Hz
RS-stocknr. 179-3533
Fabrikantnummer184767 & EMR6-AWM820-J-1
FabrikantEaton
€ 228,65
Each
Aantal stuks
Phase, Voltage - - - - 530 → 820V ac - - - - 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 179-3520
Fabrikantnummer184755 & EMR6-I15-B-1
FabrikantEaton
€ 153,00
Each
Aantal stuks
Current - - - 1 - - 0.3 → 1.5 A, 1 → 5 A, 3 → 15A 1.5 A, 5 A, 15A - 0.1 → 30s - - -
RS-stocknr. 179-3546
Fabrikantnummer184778 & EMR6-W400-M-1
FabrikantEaton
€ 140,25
Each
Aantal stuks
Phase, Voltage - - - - - - - - - 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 179-3535
Fabrikantnummer184769 & EMR6-AWN280-K-1
FabrikantEaton
€ 208,25
Each
Aantal stuks
Phase, Voltage - - - - 180 → 280V ac - - - - 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 179-3538
Fabrikantnummer184772 & EMR6-R250-A-1
FabrikantEaton
€ 223,55
Each
Aantal stuks
Insulation - - - - 0 → 250 V ac, 0 → 300V dc - - - - - - - -
RS-stocknr. 179-3542
Fabrikantnummer184775 & EMR6-RC690
FabrikantEaton
€ 249,90
Each
Aantal stuks
Insulation - - - - 0 → 690V ac - - - - - - - -
RS-stocknr. 179-3519
Fabrikantnummer184754 & EMR6-I15-A-1
FabrikantEaton
€ 183,60
Each
Aantal stuks
Current - - - 1 - - 0.3 A, 1 A, 3A 1.5 A, 5 A, 15A - 0.1 → 30s - - -
RS-stocknr. 179-3534
Fabrikantnummer184768 & EMR6-AWN170-E-1
FabrikantEaton
€ 182,75
Each
Aantal stuks
Phase, Voltage - - - - 90 → 170V ac - - - - 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 179-3524
Fabrikantnummer184758 & EMR6-N100-N-1
FabrikantEaton
€ 91,80
Each
Aantal stuks
Level - - - - - - - - - - - - -
RS-stocknr. 179-3531
Fabrikantnummer184765 & EMR6-AWM580-H-1
FabrikantEaton
€ 228,65
Each
Aantal stuks
Phase, Voltage - - - - 350 → 580V ac - - - - 0.1 → 30s - - 50 → 60Hz