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. 819-3305
FabrikantnummerK8AK-VW3 100-240VAC
FabrikantOmron
€ 96,85
Each
Aantal stuks
Voltage 100 → 240 V ac SPDT Overvoltage, Undervoltage 1 20 → 200 V ac/dc, 30 → 300 V ac/dc, 60 → 600 V ac/dc - - - - 0.1 → 30 s - - -
RS-stocknr. 819-3245
FabrikantnummerK8AK-LS1 100-240VAC
FabrikantOmron
€ 51,40
Each
Aantal stuks
Level Control 100 → 240 V ac SPDT - - - - - - - - - - -
RS-stocknr. 111-3124
FabrikantnummerK8DT-LS1CD
FabrikantOmron
€ 53,05
Each
Aantal stuks
Resistance 24 V ac/dc SPDT - 3 - - - - - 0.1 → 10 s - - -
RS-stocknr. 111-3092
FabrikantnummerK8DT-AS2CD
FabrikantOmron
€ 83,70
Each
Aantal stuks
Current 24 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 0.1 A, 0.5 A 1 A, 5 A - 250 ms - - -
RS-stocknr. 819-3254
FabrikantnummerK8AKPH1200500VAC
FabrikantOmron
€ 56,90
Each
Aantal stuks
Phase 200 → 480 V ac DPDT - 3 - - - - Phase Loss, Phase Sequence 0.1 s - - -
RS-stocknr. 819-3204
FabrikantnummerK8AK-AS1 24VAC/DC
FabrikantOmron
€ 79,70
Each
Aantal stuks
Current 24 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 2 500mA - - - - -
RS-stocknr. 819-3298
FabrikantnummerK8AK-VS3 24VAC/DC
FabrikantOmron
€ 68,35
Each
Aantal stuks
Voltage 24 V ac/dc SPDT Overvoltage, Undervoltage 1 20 → 200 V ac/dc, 30 → 300 V ac/dc, 60 → 600 V ac/dc - - - - 0.1 → 30 s - - -
RS-stocknr. 819-3248
FabrikantnummerK8AK-LS1 24VAC/DC
FabrikantOmron
€ 51,40
Each
Aantal stuks
Level Control 24 V ac/dc SPDT - - - - - - - - - - -
RS-stocknr. 819-3286
FabrikantnummerK8AK-VS2 24VAC/DC
FabrikantOmron
€ 68,35
Each
Aantal stuks
Voltage 24 V ac/dc SPDT Overvoltage, Undervoltage 1 1 → 10 V ac/dc, 3 → 30 V ac/dc, 15 → 150 V ac/dc - - - - 0.1 → 30 s - - -
RS-stocknr. 111-3091
FabrikantnummerK8DT-AS2CA
FabrikantOmron
€ 83,70
Each
Aantal stuks
Current 100 → 240 V ac SPDT - 1 - Overcurrent, Undercurrent 0.1 A, 0.5 A 1 A, 5 A - 250 ms - - -
RS-stocknr. 819-3267
FabrikantnummerK8AKPM2380480VAC
FabrikantOmron
€ 131,40
Each
Aantal stuks
Phase 220 → 480 V ac SPDT - 3 - - - - Overvoltage, Phase Loss, Phase Sequence, Undervoltage 0.1 → 30 s - - -
RS-stocknr. 819-3232
FabrikantnummerK8AK-AW3 100-240VAC
FabrikantOmron
€ 108,90
Each
Aantal stuks
Current 100 → 240 V ac SPDT - 1 - Overcurrent, Undercurrent 10 200A - - - - -
RS-stocknr. 819-3208
FabrikantnummerK8AK-AS2 100-240VAC
FabrikantOmron
€ 79,70
Each
Aantal stuks
Current 100 → 240 V ac SPDT - 1 - Overcurrent, Undercurrent 0.1 8A - - - - -
RS-stocknr. 819-3273
FabrikantnummerK8AK-TH11S 100-240VAC
FabrikantOmron
€ 114,20
Each
Aantal stuks
Temperature 100 → 240 V ac SPDT - - - - - - - 100 ms Overtemperature 0 → 999 -
RS-stocknr. 111-3135
FabrikantnummerK8DT-PH1CN
FabrikantOmron
€ 50,35
Each
Aantal stuks
Phase 200 → 480 V ac SPDT - 3 - - - - Phase Loss, Phase Sequence - - - -
RS-stocknr. 111-3128
FabrikantnummerK8DT-TH1CD
FabrikantOmron
€ 117,50
Each
Aantal stuks
Temperature 24 V ac/dc SPDT - - - - - - - - Overtemperature 0 → +999 -
RS-stocknr. 111-3096
FabrikantnummerK8DT-AS3CD
FabrikantOmron
€ 79,70
Each
Aantal stuks
Current 24 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 10 A, 20 A 100 A, 200 A - 250 ms - - -
RS-stocknr. 111-3129
FabrikantnummerK8DT-TH1TA
FabrikantOmron
€ 109,70
Each
Aantal stuks
Temperature 100 → 240 V ac SPST - - - - - - - - Overtemperature 0 → +999 -
RS-stocknr. 819-3217
FabrikantnummerK8AK-AS2 24VAC/DC
FabrikantOmron
€ 79,70
Each
Aantal stuks
Current 24 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 0.1 8A - - - - -
RS-stocknr. 819-3302
FabrikantnummerK8AK-VW2 24VAC/DC
FabrikantOmron
€ 96,85
Each
Aantal stuks
Voltage 24 V ac/dc SPDT Overvoltage, Undervoltage 1 1 → 10 V ac/dc, 3 → 30 V ac/dc, 15 → 150 V ac/dc - - - - 0.1 → 30 s - - -