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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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 102-6130
MarqueRS PRO
45,96 €
Each
Unité
Voltage 12 → 24 V dc SPDT Undervoltage 1 12 → 24 V dc - - - - 0 → 30 s - - -
N° de stock RS 102-6136
MarqueRS PRO
51,75 €
Each
Unité
Phase, Voltage 280 → 520 V ac SPDT Undervoltage 3 300 → 500 (Undervoltage) V - - - Phase Failure, Phase Sequence 0.2 → 10 s - - 48 → 63 Hz
N° de stock RS 102-6134
MarqueRS PRO
90,78 €
Each
Unité
Current 24 → 230 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 1A 10A - 0.1 → 30 s - - 48 → 63 Hz
N° de stock RS 102-6137
MarqueRS PRO
66,59 €
Each
Unité
Phase, Voltage 400 V ac SPDT Overvoltage, Undervoltage 3 300 → 380 (Undervoltage) V, 420 → 500 (Overvoltage) V - - - Phase Failure, Phase Sequence 0.2 → 10 s - - 48 → 63 Hz
N° de stock RS 102-6131
MarqueRS PRO
51,75 €
Each
Unité
Voltage 230 V ac SPDT Overvoltage, Undervoltage 1 173 → 218 (Undervoltage) V, 242 → 288 (Overvoltage) V - - - - 0.2 → 10 s - - 48 → 63 Hz
N° de stock RS 102-6133
MarqueRS PRO
90,78 €
Each
Unité
Voltage 24 → 230 V ac/dc SPDT Overvoltage, Undervoltage 1 50 → 500 V - - - - 0.1 → 30 s - - 48 → 63 Hz
N° de stock RS 102-6135
MarqueRS PRO
49,21 €
Each
Unité
Phase, Voltage 280 → 520 V ac SPDT Undervoltage 3 Maximum of 280 V - - - Phase Failure, Phase Sequence 100 ms - - 48 → 63 Hz
N° de stock RS 131-791
Référence fabricantZ-TN230/SS
MarqueEaton
50,36 €
Each
Unité
- 230 V ac DPST - - - - - - - - - - 50 Hz
N° de stock RS 298-9416
Référence fabricant45175 230VAC
72,09 €
Each
Unité
Speed 230 V ac SPDT - - - - - - - 0.5 → 30 min, 0.5 → 30 s - - -
N° de stock RS 124-0193
Référence fabricantRM35LM33MW
56,52 €
Each
Unité
Level 20.4 → 264 V ac/dc DPDT - 1 - - - - - 0.1 → 5 s - - -
N° de stock RS 240-9320
Référence fabricantBA9053/410 AC1A/5A/10A AC230V 0-20S
MarqueDold
221,80 €
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
214,14 €
Each
Unité
Voltage 230/400 V ac DPDT Undervoltage - - - - - - - - - -
N° de stock RS 857-7905
Référence fabricantDUB01CD48500V
172,06 €
Each
Unité
Voltage 24 → 48 V ac/dc SPDT Overvoltage, Undervoltage 1 2 → 500 V ac/dc - - - - 1 s, 6 s - - -
N° de stock RS 518-7297
Référence fabricant3UG4513-1BR20
MarqueSiemens
131,40 €
Each
Unité
Phase, Voltage 160 → 690 V ac DPDT Undervoltage 3 160 → 690 V ac - - - Phase Failure, Phase Imbalance, Phase Sequence 0.1 → 20 s - - -
N° de stock RS 518-7174
Référence fabricant3UG4615-1CR20
MarqueSiemens
190,80 €
Each
Unité
Phase, Voltage 160 → 690 V ac DPDT Overvoltage, Undervoltage 3 160 → 690 V ac - - - Phase Failure, Phase Sequence 0.1 → 20 s - - -
N° de stock RS 857-7075
Référence fabricantDIA53S72420A
51,10 €
Each
Unité
Current - SPST - 1 - Overcurrent - - - <300 ms - - -
N° de stock RS 146-480
Référence fabricantRM35TF30
130,86 €
Each
Unité
Phase, Voltage 220 → 480 V ac DPDT Overvoltage, Undervoltage 3 194 → 528 V ac - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 → 10 s - - -
N° de stock RS 857-7662
Référence fabricantDPA51CM44
158,50 €
Each
Unité
Phase 208 → 480 V ac SPDT - 3 177 → 550 V ac - - - Phase Loss, Phase Sequence - - - -
N° de stock RS 850-5411
Référence fabricantLBVR/A 12-24VDC
59,48 €
Each
Unité
Voltage 8 → 30 V dc SPDT Undervoltage - 12 → 24 V dc - - - - 0 → 30 s - - -
N° de stock RS 727-1256
Référence fabricantPUA01CB23500V
66,10 €
Each
Unité
Current, Voltage 115/230 V ac SPDT Overvoltage - 0.4 → 500 V ac, 2 → 500 V dc Overcurrent - - - <300 ms - - -