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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detalji proizvoda Proizvođač Stock 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 Maximum Operating Temperature Minimum Operating Temperature Dimensions Series Maximum Voltage Sensed Minimum Voltage Sensed Current Range Length Width Height Standards Met Special Features Operating Temperature Range Maximum Frequency Sensed Maximum Temperature Sensed Minimum Frequency Sensed Terminal Type Mounting Type Minimum Temperature Sensed Number of Poles Frequency Sensitivity
Broyce Control Phase Monitoring Relay With 2 x SPDT Contacts, 3 Phase Broyce Control 0 Phase - 2 x SPDT - 3 - - - - - - - - - - - - - - - - 17.5mm - - - - - - - - Screw DIN Rail Mount - 1 -
Broyce Control Voltage Monitoring Relay With 1 x SPDT Contacts, 100 → 230 V ac/dc Broyce Control 0 Voltage 100 → 230 V ac/dc 1 x SPDT - - - - - - - - - - 48 → 63 Hz +60°C -20°C 17.5 x 66.5 x 89 mm - - - Maximum of 5 A 17.5mm 66.5mm 89mm - - -20 → +60 °C 63Hz - 48Hz Screw DIN Rail Mount - 1 -
Broyce Control Voltage Monitoring Relay With 2 x SPNO Contacts, 100 → 230 V ac/dc Broyce Control 0 Voltage 100 → 230 V ac/dc 2 x SPNO - - - - - - - 1 s - - 48 → 63 Hz +60°C -20°C 44 x 63.5 x 85 mm - - - Maximum of 5 A 44mm 63.5mm 85mm - - -20 → +60 °C 63Hz - 48Hz Screw DIN Rail Mount - 1 -
Broyce Control Voltage Monitoring Relay With 3 x SPNO Contacts, 100 → 230 V ac/dc Broyce Control 0 Voltage 100 → 230 V ac/dc 3 x SPNO - - - - - - - 1 s - - 48 → 63 Hz +60°C -20°C 44 x 63.5 x 85 mm - - - Maximum of 5 A 44mm 63.5mm 85mm - - -20 → +60 °C 63Hz - 48Hz Screw DIN Rail Mount - 1 -
Broyce Control Voltage Monitoring Relay With 3 x SPNO Contacts, 100 → 230 V ac/dc Broyce Control 0 Voltage 100 → 230 V ac/dc 3 x SPNO - - - - - - - - - - - - - - - - - Maximum of 5 A 44mm - - cULus Listed - - - - - Screw DIN Rail Mount - 1 -
Schneider Electric Frequency, Voltage with NFC Monitoring Relay, 208 → 480 V ac, 3 Phase Schneider Electric 5 Frequency, Voltage with NFC 208 → 480 V ac - - 3 - - - - - - - - - +60°C -20 - - - - - 99mm 22.5 90mm - - - - - - - DIN Rail - 3 -
Eaton EMR6 Insulation Monitoring Relay, 24 → 240 V ac/dc
  • RS kat. broj 179-3538
  • robna marka Eaton
  • Pro. broj EMR6-R250-A-1
Eaton 4 Insulation 24 → 240 V ac/dc - - - 0 → 250 V ac, 0 → 300 V dc - - - - - - - - +60°C -25°C 22.5 x 109.5 x 78 mm EMR6 250 V ac, 300 V dc 0 V ac/dc - 22.5mm 109.5mm 78mm - - -25 → +60 °C - - - Screw DIN Rail - - -
Eaton EMR6 Current Monitoring Relay, 24 → 240 V ac/dc, 1 Phase Eaton 3 Current 24 → 240 V ac/dc - - 1 - - 0.003 A, 0.01 A, 0.1 A 0.03 A, 0.1 A, 1 A - 0.1 → 30 s - - - +60°C -25°C 22.5 x 109.5 x 78 mm EMR6 - - 0.003 → 0.03 A, 0.01 → 0.1 A, 0.1 → 1 A 22.5mm 109.5mm 78mm - - -25 → +60 °C - - - Screw DIN Rail - - -
Phoenix Contact SCK-C-MODBUS Monitoring Relay, 24 V dc Phoenix Contact 3 - 24 V dc - - - - - - - - - - - - +70°C -20°C 22.5 x 102 x 106 mm SCK-C-MODBUS - - 800 mA 22.5mm 102mm 106mm - - -20 → +70 °C - - - Screw Horizontal Mount, Vertical Mount - - -
Schneider Electric Zelio Control Phase Monitoring Relay With DPDT Contacts, 208 → 480 V ac, 3 Phase Schneider Electric 3 Phase 208 → 480 V ac DPDT Overvoltage 3 <100 V ac - - - Phase Failure, Phase Sequence - - - - +50 (60 Hz) °C, +60 (50 Hz) °C -20°C 22.9 x 79.5 x 90 mm Zelio Control 528V ac 183 V ac 10 (DC) mA, 8 (AC) A 22.9mm 79.5mm 90mm - - -20 → +50 (60 Hz) °C, -20 → +60 (50 Hz) °C - - - Screw DIN Rail - - -
Schneider Electric Zelio Control Phase Monitoring Relay With DPDT Contacts, 380 → 480 V ac, 3 Phase Schneider Electric 3 Phase 380 → 480 V ac DPDT Overvoltage 3 <100 V ac - - - - 30 s - - - +50 (60 Hz) °C, +60 (50 Hz) °C -20°C 22.9 x 79.5 x 90 mm Zelio Control 480V ac 380 V ac 10 (DC) mA, 8 (AC) A 22.9mm 79.5mm 90mm - - -20 → +50 (60 Hz) °C, -20 → +60 (50 Hz) °C - - - Screw DIN Rail - - -
Eaton EMR6 Current Monitoring Relay, 24 → 240 V ac/dc, 1 Phase Eaton 2 Current 24 → 240 V ac/dc - - 1 - - 0.003 A, 0.01 A, 0.1 A 0.03 A, 0.1 A, 1 A - 0.1 → 30 s - - - +60°C -25°C 22.5 x 109.5 x 78 mm EMR6 - - 0.003 → 0.03 A, 0.01 → 0.1 A, 0.1 → 1 A 22.5mm 109.5mm 78mm - - -25 → +60 °C - - - Screw DIN Rail - - -
Eaton EMR6 Current Monitoring Relay, 24 → 240 V ac/dc, 1 Phase
  • RS kat. broj 179-3552
  • robna marka Eaton
  • Pro. broj EMR6-IF15-A-1
Eaton 2 Current 24 → 240 V ac/dc - - 1 - - 0.3 A, 1 A, 3 A 1.5 A, 5 A, 15 A - 0.1 → 30 s - - - +60°C -25°C 22.5 x 109.5 x 78 mm EMR6 - - 0.3 → 1.5 A, 1 → 5 A, 3 → 15 A 22.5mm 109.5mm 78mm - - -25 → +60 °C - - - Screw DIN Rail - - -
Eaton EMR6 Current Monitoring Relay, 24 → 240 V ac/dc, 1 Phase
  • RS kat. broj 179-3549
  • robna marka Eaton
  • Pro. broj EMR6-IM15-A-1
Eaton 2 Current 24 → 240 V ac/dc - - 1 - - 0.003 A, 0.01 A, 0.1 A 0.03 A, 0.1 A, 1 A - 0.1 → 30 s - - - +60°C -25°C 22.5 x 109.5 x 78 mm EMR6 - - 0.003 → 0.03 A, 0.01 → 0.1 A, 0.1 → 1 A 22.5mm 109.5mm 78mm - - -25 → +60 °C - - - Screw DIN Rail - - -
Eaton EMR6 Level Monitoring Relay, 110 → 130 V ac, 220 → 240 V ac
  • RS kat. broj 179-3524
  • robna marka Eaton
  • Pro. broj EMR6-N100-N-1
Eaton 2 Level 110 → 130 V ac, 220 → 240 V ac - - - - - - - - - - - - +60°C -25°C 23 x 110 x 85 mm EMR6 - - - 23mm 110mm 85mm - - -25 → +60 °C - - - Screw DIN Rail - - -
Eaton EMR6 Monitoring Relay Eaton 2 - - - - - - - - - - - - - - - - - EMR6 - - - - 22.5mm - - - - - - - - - - - -
Eaton EMR6 Phase, Voltage Monitoring Relay, 160 → 300 V ac
  • RS kat. broj 179-3529
  • robna marka Eaton
  • Pro. broj EMR6-AW300-C-1
Eaton 2 Phase, Voltage 160 → 300 V ac - - - 160 → 300 V ac - - - - 0.1 → 30 s - - 50 → 60 Hz +60°C -25°C 22.5 x 109.5 x 78 mm EMR6 300V ac 160 V ac - 22.5mm 109.5mm 78mm - - -25 → +60 °C 60Hz - 50Hz Screw DIN Rail - - -
Eaton EMR6 Phase, Voltage Monitoring Relay, 160 → 300 V ac
  • RS kat. broj 179-3527
  • robna marka Eaton
  • Pro. broj EMR6-A300-C-1
Eaton 2 Phase, Voltage 160 → 300 V ac - - - 160 → 300 V ac - - - - 0.1 → 30 s - - 50 → 60 Hz +60°C -25°C 22.5 x 109.5 x 78 mm EMR6 300V ac 160 V ac - 22.5mm 109.5mm 78mm - - -25 → +60 °C 60Hz - 50Hz Screw DIN Rail - - -
Eaton EMR6 Phase, Voltage Monitoring Relay, 180 → 280 V ac
  • RS kat. broj 179-3535
  • robna marka Eaton
  • Pro. broj EMR6-AWN280-K-1
Eaton 2 Phase, Voltage 180 → 280 V ac - - - 180 → 280 V ac - - - - 0.1 → 30 s - - 50 → 60 Hz +60°C -25°C 22.5 x 109.5 x 78 mm EMR6 280 180 V ac - 22.5mm 109.5mm 78mm - - -25 → +60 °C 60 - 50Hz Screw DIN Rail - - -
Eaton EMR6 Phase, Voltage Monitoring Relay, 180 → 280 V ac
  • RS kat. broj 179-3536
  • robna marka Eaton
  • Pro. broj EMR6-AWN280-D-1
Eaton 2 Phase, Voltage 180 → 280 V ac - - - 180 → 280 V ac - - - - 0.1 → 30 s - - 50 → 60 Hz +60°C -25°C 22.5 x 109.5 x 78 mm EMR6 280 180 V ac - 22.5mm 109.5mm 78mm - - -25 → +60 °C 60 - 50Hz Screw DIN Rail - - -
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