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. 240-9320
FabrikantnummerBA9053/410 AC1A/5A/10A AC230V 0-20S
FabrikantDold
226,24 €
Each
Aantal stuks
Current 230 V ac SPDT - - - - 0.1A 10A - 0.5 → 5 s - - -
RS-stocknr. 240-8939
FabrikantnummerBA9043 3AC50-400Hz 230/400V
FabrikantDold
218,42 €
Each
Aantal stuks
Voltage - DPDT Undervoltage - - - - - - - - - -
RS-stocknr. 445-9068
FabrikantnummerIL5880.12 AC50-400Hz 220-240V 5-100kOHM
FabrikantDold
205,65 €
Each
Aantal stuks
Voltage - DPDT - 1, 3 0 → 500V ac - - - - <1.3s - - -
RS-stocknr. 240-8923
FabrikantnummerBA9041 3AC50Hz 400V
FabrikantDold
161,42 €
Each
Aantal stuks
Phase 400 V ac DPDT - 3 - - - - Phase Sequence <50 ms - - -
RS-stocknr. 410-5963
FabrikantnummerIK9094.11 AC/DC24V 0-150°C
FabrikantDold
104,84 €
Each
Aantal stuks
Temperature - SPDT - - - - - - - - Overtemperature 0 → +150°C -
RS-stocknr. 240-8844
FabrikantnummerBD5936.17 AC50/60Hz 230V
FabrikantDold
302,99 €
Each
Aantal stuks
Standstill 230 V DPDT - - - - - - - - - - -
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. 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. 445-9046
FabrikantnummerIL5882.38 AC/DC24V-230V Tv=5S
FabrikantDold
256,54 €
Each
Aantal stuks
Current - DPDT - - - - 10mA 10A - 0 → 5s - - -
RS-stocknr. 327-7641
FabrikantnummerIL9151.12 2-450kOHM AC230V 0.2-20S
FabrikantDold
161,53 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 445-9074
FabrikantnummerBH9097.38/001 3AC400V AC40A
FabrikantDold
398,42 €
Each
Aantal stuks
Phase 400 V ac DPDT - 3 - - - - - 0 → 10 s - - -
RS-stocknr. 240-9033
FabrikantnummerAI897 AC45-400Hz230V 10-80kOhm
FabrikantDold
227,82 €
Each
Aantal stuks
Voltage - SPDT - 1, 3 0.8 → 1.1 - - - - <4.2s - - -
RS-stocknr. 656-6180
FabrikantnummerIN9017/100 0-10V AC230V 300W
FabrikantDold
258,54 €
Each
Aantal stuks
Phase - - - - - - - - - 200ms - - -
RS-stocknr. 465-0687
FabrikantnummerIK8702.01 AC50/60Hz 230V
FabrikantDold
52,89 €
Each
Aantal stuks
Current - SPST - - - - - - - >=30ms - - -
RS-stocknr. 291-3150
FabrikantnummerIL9079.12/002 3AC230/400V 0.55-1.05UN 0.2-2S
FabrikantDold
229,93 €
Each
Aantal stuks
Voltage - DPDT Undervoltage 3 - - - - - 0.2 → 2s - - -
RS-stocknr. 358-6951
FabrikantnummerIK9178 3AC50/60Hz 400V
FabrikantDold
54,48 €
Each
Aantal stuks
Phase - - - - - - - - Phase Sequence - - - -
RS-stocknr. 181-2768
FabrikantnummerRN5883.12/61 AC/DC24-80V 10-3000mA 0-10s
FabrikantDold
475,17 €
Each
Aantal stuks
Residual Current - DPDT - 2 - - 10mA 3000mA - 0 → 10s - - -
RS-stocknr. 358-6917
FabrikantnummerIK9168 3AC50/60Hz 230/400V
FabrikantDold
52,47 €
Each
Aantal stuks
Phase - - - - - - - - Phase Sequence - - - -
RS-stocknr. 181-2783
FabrikantnummerLH5946.48/61 20-400mV UH=AC230V 0,2-6s
FabrikantDold
570,08 €
Each
Aantal stuks
Standstill - 3NO/NC - - - - - - - 0.2 → 6s - - -
RS-stocknr. 240-8967
FabrikantnummerBD9080.12 3AC400V UH=AC230V
FabrikantDold
322,73 €
Each
Aantal stuks
Phase, Voltage 400 V ac DPDT Overvoltage, Undervoltage 3 - - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 → 5 s - - -