Monitoring Relays

pMonitoring 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. /p pbr/p pMonitoring 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. /p pbr/p pstrongWhat are monitoring relays used for?/strong/p pMonitoring 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./p pbr/p pstrongTypes of monitoring relay/strong/p pThe main way in which monitoring relays differ is the function that they measure. This can be a number of things, including:/p ul livoltage/li licurrent/li litemperature/li lifrequency/li /ul pThe factor that you need to measure will decide which monitoring relay you choose./p

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Description Price 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 Stock No. 102-6137
BrandRS PRO
MYR379.36
Each
units
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
RS Stock No. 102-6130
BrandRS PRO
MYR185.02
Each
units
Voltage 12 → 24 V dc SPDT Undervoltage 1 12 → 24 V dc - - - - 0 → 30 s - - -
RS Stock No. 102-6131
BrandRS PRO
MYR294.82
Each
units
Voltage 230 V ac SPDT Overvoltage, Undervoltage 1 173 → 218 (Undervoltage) V, 242 → 288 (Overvoltage) V - - - - 0.2 → 10 s - - 48 → 63 Hz
RS Stock No. 102-6136
BrandRS PRO
MYR286.23
Each
units
Phase, Voltage 280 → 520 V ac SPDT Undervoltage 3 300 → 500 (Undervoltage) V - - - Phase Failure, Phase Sequence 0.2 → 10 s - - 48 → 63 Hz
RS Stock No. 102-6133
BrandRS PRO
MYR502.10
Each
units
Voltage 24 → 230 V ac/dc SPDT Overvoltage, Undervoltage 1 50 → 500 V - - - - 0.1 → 30 s - - 48 → 63 Hz
RS Stock No. 102-6135
BrandRS PRO
MYR280.39
Each
units
Phase, Voltage 280 → 520 V ac SPDT Undervoltage 3 Maximum of 280 V - - - Phase Failure, Phase Sequence 100 ms - - 48 → 63 Hz
RS Stock No. 102-6134
BrandRS PRO
MYR446.92
Each
units
Current 24 → 230 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 1A 10A - 0.1 → 30 s - - 48 → 63 Hz