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. 146-092
FabrikantnummerRM17JC00MW
115,29 €
Each
Aantal stuks
Current - SPDT - - - Overcurrent 2A 20A - 0.5s - - -
RS-stocknr. 806-5932
Fabrikantnummer1SVR750669R9400 CM-IVN.S
FabrikantABB
332,00 €
Each
Aantal stuks
Insulation - - - - 0 → 1000 V dc, 0 → 690V ac - - - - - - - -
RS-stocknr. 146-159
FabrikantnummerRM17UAS16
88,65 €
Each
Aantal stuks
Voltage - SPDT Overvoltage, Self Powered, Undervoltage 1 20 → 80V ac/dc - - - - 0.1 → 10s - - -
RS-stocknr. 890-3884
Fabrikantnummer2902065
FabrikantPhoenix Contact
118,13 €
Each
Aantal stuks
Current, Voltage - - - - 1.25 → 10V dc Overcurrent 2.5mA 20mA - - - - -
RS-stocknr. 609-8075
FabrikantnummerLT3SM00ED
235,29 €
Each
Aantal stuks
Temperature - SPDT - - - - - - - - Overtemperature, Undertemperature - -
RS-stocknr. 819-3267
FabrikantnummerK8AKPM2380480VAC
FabrikantOmron
118,62 €
Each
Aantal stuks
Phase - SPDT - 3 - - - - Overvoltage, Phase Loss, Phase Sequence, Undervoltage 0.1 → 30s - - -
RS-stocknr. 261-959
Fabrikantnummer84871122
FabrikantCrouzet
101,27 €
Each
Aantal stuks
Current - SP-NO/NC - - - Overcurrent, Undercurrent 2A 20A - 500ms - - -
RS-stocknr. 298-9400
Fabrikantnummer45050 230VAC
FabrikantBroyce Control
91,64 €
Each
Aantal stuks
Voltage - SPDT Overvoltage 1 0.5 → 10 V ac/dc, 3 → 60 V ac/dc, 30 → 600V ac/dc - - - - 0.1 → 3s - - -
RS-stocknr. 240-9049
FabrikantnummerAI898 DC24V 6kOhm UH=AC45-400Hz 230V
FabrikantDold
335,08 €
Each
Aantal stuks
Voltage - SPDT - - 0.8 → 1.1 - - - - 0.4s - - -
RS-stocknr. 890-3875
Fabrikantnummer2902035
FabrikantPhoenix Contact
173,08 €
Each
Aantal stuks
Current, Voltage - SPDT - - - Overcurrent 0mA 24mA - - - - -
RS-stocknr. 124-0182
FabrikantnummerRM22LG11MR
41,79 €
Each
Aantal stuks
Level - SPDT - 1 - - - - - - - - -
RS-stocknr. 321-6848
Fabrikantnummer45175 110VAC
FabrikantBroyce Control
73,17 €
Each
Aantal stuks
Speed - SPDT - - - - - - - 0.5 → 30 min, 0.5 → 30s - - -
RS-stocknr. 609-8069
FabrikantnummerLT3SE00BD
103,83 €
Each
Aantal stuks
Temperature - SPST - - - - - - - - Overtemperature, Undertemperature - -
RS-stocknr. 800-2928
Fabrikantnummer70.62.8.400.0000
FabrikantFinder
75,18 €
Each
Aantal stuks
Voltage - DPDT - 3 208 → 480V ac - - - Phase Loss, Phase Rotation - - - 50 → 60Hz
RS-stocknr. 145-976
FabrikantnummerRM35JA32MW
108,36 €
Each
Aantal stuks
Current - DPDT - - - Overcurrent, Undercurrent 0.15A 15A - 0.3 → 30s - - -
RS-stocknr. 291-3144
FabrikantnummerIL9077.12 3/NAC 400/230V 0.1-20S
FabrikantDold
230,04 €
Each
Aantal stuks
Voltage - DPDT Overvoltage, Undervoltage 3 - - - - - 0.1 → 20s - - -
RS-stocknr. 857-7072
FabrikantnummerDIA53S72450A
FabrikantCarlo Gavazzi
138,33 €
Each
Aantal stuks
Current - SPST - 1 - Overcurrent - - - <300ms - - -
RS-stocknr. 776-1581
Fabrikantnummer72.01.8.240.0000
FabrikantFinder
67,61 €
Each
Aantal stuks
Level - SPDT - 1 - - - - - 0.5 → 7s - - -
RS-stocknr. 614-9432
Fabrikantnummer84872141
FabrikantCrouzet
100,93 €
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage 1 20 → 80V ac/dc - - - - 0.1 → 10s - - -
RS-stocknr. 102-6130
FabrikantRS PRO
49,96 €
Each
Aantal stuks
Voltage - SPDT Undervoltage 1 12 → 24V dc - - - - 0 → 30s - - -