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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Nombre de résultats par page
Description Prix 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
N° de stock RS 131-791
Référence fabricant265574 & Z-TN230/SS
MarqueEaton
52,71 €
Each
Unité
- - DPST - - - - - - - - - - 50Hz
N° de stock RS 298-9416
Référence fabricant45175 230VAC
73,17 €
Each
Unité
Speed - SPDT - - - - - - - 0.5 → 30 min, 0.5 → 30s - - -
N° de stock RS 124-0193
Référence fabricantRM35LM33MW
56,52 €
Each
Unité
Level - DPDT - 1 - - - - - 0.1 → 5s - - -
N° de stock RS 240-9320
Référence fabricantBA9053/410 AC1A/5A/10A AC230V 0-20S
MarqueDold
226,24 €
Each
Unité
Current 230 V ac SPDT - - - - 0.1A 10A - 0.5 → 5 s - - -
N° de stock RS 240-8939
Référence fabricantBA9043 3AC50-400Hz 230/400V
MarqueDold
218,42 €
Each
Unité
Voltage - DPDT Undervoltage - - - - - - - - - -
N° de stock RS 857-7075
Référence fabricantDIA53S72420A
51,53 €
Each
Unité
Current - SPST - 1 - Overcurrent - - - <300ms - - -
N° de stock RS 518-7174
Référence fabricant3UG4615-1CR20
MarqueSiemens
190,80 €
Each
Unité
Phase, Voltage - DPDT Overvoltage, Undervoltage 3 160 → 690V ac - - - Phase Failure, Phase Sequence 0.1 → 20s - - -
N° de stock RS 857-7905
Référence fabricantDUB01CD48500V
175,50 €
Each
Unité
Voltage - SPDT Overvoltage, Undervoltage 1 2 → 500V ac/dc - - - - 1 s, 6s - - -
N° de stock RS 146-480
Référence fabricantRM35TF30
130,86 €
Each
Unité
Phase, Voltage - DPDT Overvoltage, Undervoltage 3 194 → 528V ac - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 → 10s - - -
N° de stock RS 850-5411
Référence fabricantLBVR/A 12-24VDC
60,37 €
Each
Unité
Voltage - SPDT Undervoltage - 12 → 24V dc - - - - 0 → 30s - - -
N° de stock RS 518-7297
Référence fabricant3UG4513-1BR20
MarqueSiemens
131,40 €
Each
Unité
Phase, Voltage - DPDT Undervoltage 3 160 → 690V ac - - - Phase Failure, Phase Imbalance, Phase Sequence 0.1 → 20s - - -
N° de stock RS 857-7662
Référence fabricantDPA51CM44
164,10 €
Each
Unité
Phase - SPDT - 3 177 → 550V ac - - - Phase Loss, Phase Sequence - - - -
N° de stock RS 819-3254
Référence fabricantK8AKPH1200500VAC
MarqueOmron
51,39 €
Each
Unité
Phase - DPDT - 3 - - - - Phase Loss, Phase Sequence 0.1s - - -
N° de stock RS 727-1256
Référence fabricantPUA01CB23500V
68,43 €
Each
Unité
Current, Voltage - SPDT Overvoltage - 0.4 → 500 V ac, 2 → 500V dc Overcurrent - - - <300ms - - -
N° de stock RS 758-6930
Référence fabricant3UG4622-2AW30
MarqueSiemens
158,40 €
Each
Unité
Current - SPDT - - - Overcurrent, Undercurrent 50mA 15A - 0.1 → 20s - - -
N° de stock RS 463-3654
Référence fabricant84871034
MarqueCrouzet
143,85 €
Each
Unité
Current - SPDT - 1 - Overcurrent, Undercurrent 0.1A 10A - 0.1 → 3s - - -
N° de stock RS 857-7696
Référence fabricantDPB01CM48
242,17 €
Each
Unité
Phase, Voltage - SPDT Overvoltage, Undervoltage 3, 3+N 323 → 550V ac - - - Phase Loss, Phase Sequence 1 s, 6s - - -
N° de stock RS 518-7168
Référence fabricant3UG4622-1AW30
MarqueSiemens
149,40 €
Each
Unité
Current - SPDT - 1 - Overcurrent, Undercurrent 50mA 10A - 0.1 → 20s - - -
N° de stock RS 614-9347
Référence fabricant84870700
MarqueCrouzet
77,74 €
Each
Unité
Level Control - DPDT - - 24 → 240V ac - 10mA 5A - 0.1 → 5s - - 50 → 60Hz
N° de stock RS 146-452
Référence fabricantRM17UB310
125,01 €
Each
Unité
Voltage - SPDT Absence of Neutral, Overvoltage and Undervoltage Between Neutral, Overvoltage and Undervoltage Between Phase 3 183 → 528V ac - - - - 0.3 → 30s - - -