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. 819-3254
FabrikantnummerK8AKPH1200500VAC
FabrikantOmron
56,90 €
Each
Aantal stuks
Phase 200 → 480 V ac DPDT - 3 - - - - Phase Loss, Phase Sequence 0.1 s - - -
RS-stocknr. 111-3136
FabrikantnummerK8DT-PH1TN
FabrikantOmron
47,00 €
Each
Aantal stuks
Phase 200 → 480 V ac SPST - 3 - - - - Phase Loss, Phase Sequence - - - -
RS-stocknr. 819-3264
FabrikantnummerK8AKPW2380480VAC
FabrikantOmron
131,40 €
Each
Aantal stuks
Voltage 220 → 480 V ac SPDT Overvoltage, Undervoltage 3 - - - - - 0.1 → 30 s - - -
RS-stocknr. 819-3210
FabrikantnummerK8AK-AS3 100-240VAC
FabrikantOmron
79,70 €
Each
Aantal stuks
Current 100 → 240 V ac SPDT - 1 - Overcurrent, Undercurrent 10 200A - - - - -
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. 819-3208
FabrikantnummerK8AK-AS2 100-240VAC
FabrikantOmron
79,70 €
Each
Aantal stuks
Current 100 → 240 V ac SPDT - 1 - Overcurrent, Undercurrent 0.1 8A - - - - -
RS-stocknr. 111-3123
FabrikantnummerK8DT-LS1CA
FabrikantOmron
53,05 €
Each
Aantal stuks
Resistance 100 → 240 V ac SPDT - 3 - - - - - 0.1 → 10 s - - -
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. 819-3214
FabrikantnummerK8AK-AS3 24VAC/DC
FabrikantOmron
79,70 €
Each
Aantal stuks
Current 24 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 10 200A - - - - -
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. 111-3126
FabrikantnummerK8DT-LS1TD
FabrikantOmron
53,05 €
Each
Aantal stuks
Resistance 24 V ac/dc SPST - 3 - - - - - 0.1 → 10 s - - -
RS-stocknr. 819-3251
FabrikantnummerK8AKPA2380480VAC
FabrikantOmron
96,85 €
Each
Aantal stuks
Phase 220 → 480 V ac SPDT - 3 - - - - Phase Asymmetry, Phase Loss, Phase Sequence 0.1 → 30 s - - -
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. 111-3103
FabrikantnummerK8DT-AW2CA
FabrikantOmron
107,00 €
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. 111-3099
FabrikantnummerK8DT-AW1CA
FabrikantOmron
106,38 €
Each
Aantal stuks
Current 100 → 240 V ac SPDT - 1 - Overcurrent, Undercurrent 2 mA, 10 mA, 20 mA 20 mA, 100 mA, 500 mA - 250 ms - - -
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. 111-3106
FabrikantnummerK8DT-AW2TD
FabrikantOmron
104,90 €
Each
Aantal stuks
Current 24 V ac/dc SPST - 1 - Overcurrent, Undercurrent 0.1 A, 0.5 A 1 A, 5 A - 250 ms - - -
RS-stocknr. 111-3101
FabrikantnummerK8DT-AW1TA
FabrikantOmron
104,90 €
Each
Aantal stuks
Current 100 → 240 V ac SPST - 1 - Overcurrent, Undercurrent 2 mA, 10 mA, 20 mA 20 mA, 100 mA, 500 mA - 250 ms - - -
RS-stocknr. 111-3097
FabrikantnummerK8DT-AS3TA
FabrikantOmron
78,10 €
Each
Aantal stuks
Current 100 → 240 V ac SPST - 1 - Overcurrent, Undercurrent 10 A, 20 A 100 A, 200 A - 250 ms - - -