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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Beskrivning Pris 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-artikelnummer 102-6136
VarumärkeRS PRO
561,97 kr
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Phase, Voltage - SPDT Undervoltage 3 - - - - Phase Failure, Phase Sequence 0.2 → 10s - - 48 → 63Hz
RS-artikelnummer 102-6133
VarumärkeRS PRO
923,44 kr
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Voltage - SPDT Overvoltage, Undervoltage 1 - - - - - 0.1 → 30s - - 48 → 63Hz
RS-artikelnummer 102-6130
VarumärkeRS PRO
574,75 kr
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Voltage - SPDT Undervoltage 1 12 → 24V dc - - - - 0 → 30s - - -
RS-artikelnummer 102-6134
VarumärkeRS PRO
923,44 kr
Each
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Current - SPDT - 1 - Overcurrent, Undercurrent 1A 10A - 0.1 → 30s - - 48 → 63Hz
RS-artikelnummer 102-6131
VarumärkeRS PRO
565,92 kr
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Voltage - SPDT Overvoltage, Undervoltage 1 - - - - - 0.2 → 10s - - 48 → 63Hz
RS-artikelnummer 102-6135
VarumärkeRS PRO
536,51 kr
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Phase, Voltage - SPDT Undervoltage 3 - - - - Phase Failure, Phase Sequence 100ms - - 48 → 63Hz
RS-artikelnummer 102-6137
VarumärkeRS PRO
711,90 kr
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Phase, Voltage - SPDT Overvoltage, Undervoltage 3 - - - - Phase Failure, Phase Sequence 0.2 → 10s - - 48 → 63Hz
RS-artikelnummer 884-2473
Tillv. art.nrMAC04D0100
VarumärkeGIC
487,72 kr
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Phase, Voltage - DPDT Overvoltage Protection, Undervoltage Protection 3 - - - - Neutral Loss, Phase Failure, Phase Reversal, Phase Sequence, Phase Symmetry - - - 47 → 53Hz
RS-artikelnummer 146-165
Tillv. art.nrRM17UAS14
VarumärkeSchneider Electric
1 254,14 kr
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Voltage - SPDT Overvoltage, Self Powered, Undervoltage 1 9 → 15V dc - - - - 0.1 → 10s - - -
RS-artikelnummer 518-7297
Tillv. art.nr3UG4513-1BR20
VarumärkeSiemens
1 599,60 kr
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Phase, Voltage - DPDT Undervoltage 3 160 → 690V ac - - - Phase Failure, Phase Imbalance, Phase Sequence 0.1 → 20s - - -
RS-artikelnummer 794-3945
Tillv. art.nrMI81BL
VarumärkeGIC
407,84 kr
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Frequency - SPDT - 1 - - - 6A - 100 ms, 500ms - - -
RS-artikelnummer 916-0088
Tillv. art.nrPMV10A440
VarumärkeLovato
985,19 kr
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Voltage - SPDT Self Powered 3 Maximum of 400V ac - - - - 60ms - - -
RS-artikelnummer 614-9397
Tillv. art.nr84871130
VarumärkeCrouzet
1 275,95 kr
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Current - DPDT - 3 - Overcurrent, Undercurrent 0.1A 10A - 0.1 → 3s - - -
RS-artikelnummer 859-3027
Tillv. art.nrDUA52C724
VarumärkeCarlo Gavazzi
1 264,00 kr
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Voltage - SPDT Undervoltage - 8 → 28V dc - - - - <200ms - - -
RS-artikelnummer 857-7662
Tillv. art.nrDPA51CM44
VarumärkeCarlo Gavazzi
1 749,96 kr
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Phase - SPDT - 3 177 → 550V ac - - - Phase Loss, Phase Sequence - - - -
RS-artikelnummer 850-5360
Tillv. art.nrLXPRC/S 400V
VarumärkeBroyce Control
839,04 kr
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Phase, Voltage - SPDT Overvoltage, Undervoltage - - - - - Phase Failure, Phase Sequence 0.2 → 10s - - -
RS-artikelnummer 347-696
Tillv. art.nrFSRST30SLP-110/230VAC
VarumärkeTempatron
812,16 kr
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Shaft Rotation Sensor - SPDT - - Maximum of 30V dc - - - - 1 → 30s - - 50 → 60Hz
RS-artikelnummer 857-7416
Tillv. art.nrPPA01CM44
VarumärkeCarlo Gavazzi
1 210,68 kr
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Phase, Voltage - SPDT - 3 177 → 475V ac - - - Phase Loss, Phase Sequence - - - -
RS-artikelnummer 775-8015
Tillv. art.nr1SVR730841R1400 CM-SRS.21S
VarumärkeABB
1 781,64 kr
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Current - DPDT - 1 - Overcurrent, Undercurrent 0.1 A, 3 mA, 10mA 1 A, 30 mA, 100mA - 0 s, 0.1 → 30s - - 50 → 60Hz
RS-artikelnummer 358-6901
Tillv. art.nrIK9271.11 AC220-240V 0.1-15A Tv=0.1-20S
VarumärkeDold
1 747,64 kr
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Current - SPDT - 1 - Undercurrent 0.1A 15A - 0.1 → 20s - - -