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. 102-6140
Fabrikantnummer106944
FabrikantEaton
€ 201,88
Each
Aantal stuks
Current 220 → 240 V ac DPDT - 1 - Overcurrent, Undercurrent 0.3 (B1) A, 1 (B2) A, 3 (B3) A 1.5 (B1) A, 15 (B3) A, 5 (B2) A - 0.1 → 30 s - - -
RS-stocknr. 131-791
FabrikantnummerZ-TN230/SS
FabrikantEaton
€ 50,36
Each
Aantal stuks
- 230 V ac DPST - - - - - - - - - - 50 Hz
RS-stocknr. 179-3518
FabrikantnummerEMR6-I1-A-1
FabrikantEaton
€ 190,10
Each
Aantal stuks
Current 24 → 240 V ac/dc - - 1 - - 0.003 A, 0.01 A, 0.1 A 0.03 A, 0.1 A, 1 A - 0.1 → 30 s - - -
RS-stocknr. 179-3519
FabrikantnummerEMR6-I15-A-1
FabrikantEaton
€ 190,10
Each
Aantal stuks
Current 24 → 240 V ac/dc - - 1 - - 0.3 A, 1 A, 3 A 1.5 A, 5 A, 15 A - 0.1 → 30 s - - -
RS-stocknr. 179-3529
FabrikantnummerEMR6-AW300-C-1
FabrikantEaton
€ 181,30
Each
Aantal stuks
Phase, Voltage 160 → 300 V ac - - - 160 → 300 V ac - - - - 0.1 → 30 s - - 50 → 60 Hz
RS-stocknr. 179-3520
FabrikantnummerEMR6-I15-B-1
FabrikantEaton
€ 158,40
Each
Aantal stuks
Current 220 → 240 V ac - - 1 - - 0.3 → 1.5 A, 1 → 5 A, 3 → 15 A 1.5 A, 5 A, 15 A - 0.1 → 30 s - - -
RS-stocknr. 179-3530
FabrikantnummerEMR6-AW500-D-1
FabrikantEaton
€ 181,30
Each
Aantal stuks
Phase, Voltage 300 → 500 V ac - - - 300 → 500 V ac - - - - 0.1 → 30 s - - 50 → 60 Hz
RS-stocknr. 179-3555
FabrikantnummerEMR6-T50-A-1
FabrikantEaton
€ 206,90
Each
Aantal stuks
Temperature 24 → 240 V ac/dc - - - - - - - - - - -50 → +50°C -
RS-stocknr. 179-3547
FabrikantnummerEMR6-W500-D-1
FabrikantEaton
€ 178,70
Each
Aantal stuks
Phase, Voltage 300 → 500 V ac - - - 300 → 500 V ac - - - - 0.1 → 30 s - - 50 → 60 Hz
RS-stocknr. 179-3521
FabrikantnummerEMR6-N1000-N-1
FabrikantEaton
€ 97,70
Each
Aantal stuks
Level 110 → 130 V ac, 220 → 240 V ac - - - - - - - - - - - -
RS-stocknr. 179-3544
FabrikantnummerEMR6-W380-L-1
FabrikantEaton
€ 145,30
Each
Aantal stuks
Phase, Voltage 380 V - - - - - - - - 0.1 → 30 s - - 50 → 60 Hz
RS-stocknr. 179-3556
FabrikantnummerEMR6-T100-A-1
FabrikantEaton
€ 206,90
Each
Aantal stuks
Temperature 24 → 240 V ac/dc - - - - - - - - - - 0 → +100°C -
RS-stocknr. 179-3548
FabrikantnummerEMR6-IM1-A-1
FabrikantEaton
€ 201,50
Each
Aantal stuks
Current 24 → 240 V ac/dc - - 1 - - 0.003 A, 0.01 A, 0.1 A 0.03 A, 0.1 A, 1 A - 0.1 → 30 s - - -
RS-stocknr. 179-3541
FabrikantnummerEMR6-R400-A-2
FabrikantEaton
€ 485,90
Each
Aantal stuks
Insulation 24 → 240 V ac/dc - - - 0 → 400 V ac - - - - - - - -
RS-stocknr. 179-3522
FabrikantnummerEMR6-N1000-A-1
FabrikantEaton
€ 139,10
Each
Aantal stuks
Level 24 → 240 V ac/dc - - - - - - - - 0.1 → 30 s - - -
RS-stocknr. 179-3531
FabrikantnummerEMR6-AWM580-H-1
FabrikantEaton
€ 236,70
Each
Aantal stuks
Phase, Voltage 350 → 580 V ac - - - 350 → 580 V ac - - - - 0.1 → 30 s - - 50 → 60 Hz
RS-stocknr. 179-3554
FabrikantnummerEMR6-VF600-A-1
FabrikantEaton
€ 201,50
Each
Aantal stuks
Voltage 24 → 240 V ac/dc - - 1 24 → 240 V ac/dc - - - - 0.1 → 30 s - - -
RS-stocknr. 179-3546
FabrikantnummerEMR6-W400-M-1
FabrikantEaton
€ 145,30
Each
Aantal stuks
Phase, Voltage 400 V ac - - - - - - - - 0.1 → 30 s - - 50 → 60 Hz
RS-stocknr. 179-3538
FabrikantnummerEMR6-R250-A-1
FabrikantEaton
€ 231,50
Each
Aantal stuks
Insulation 24 → 240 V ac/dc - - - 0 → 250 V ac, 0 → 300 V dc - - - - - - - -
RS-stocknr. 179-3543
FabrikantnummerEMR6-W300-C-1
FabrikantEaton
€ 178,70
Each
Aantal stuks
Phase, Voltage 160 → 300 V ac - - - 160 → 300 V ac - - - - 0.1 → 30 s - - 50 → 60 Hz