Monitoring Relays
What are Monitoring Relays?
Monitoring relays are electrical devices that are used to monitor various parameters in a power system, such as voltage, current, temperature, and frequency, and trigger an alarm or action if the values go beyond a preset threshold. They are designed to detect abnormal operating conditions in a system and alert operators or take corrective action to pre...
Showing 1-20 of 1261 products
RS Pro
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Voltage
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1
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CO
150 → 300V ac
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Overvoltage, Undervoltage
DIN Rail
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Screw
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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RS Pro
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Voltage
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1
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CO
150 → 300V ac
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Overvoltage, Undervoltage
DIN Rail
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Screw
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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RS Pro
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Voltage
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3
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CO
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Voltage Asymmetry
DIN Rail
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Screw
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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RS Pro
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Voltage
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3
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CO
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Voltage Asymmetry
DIN Rail
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Screw
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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RS Pro
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Current
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Three
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1NO/1NC
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DIN Rail Mount
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40A
100A
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0.1 → 20s
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-20°C
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CE
84.5mm
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44 x 84.5 x 75mm
40 → 100A
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55°C
-20 to 55°C
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75mm
44mm
Error Delay Time Adjustable
RS Pro
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Voltage
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Single
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1NO
120 → 300V ac
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Overvoltage
DIN Rail Mount
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0.1 → 600s
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-20°C
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CE
67.5mm
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120V
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300V
52.9 x 67.5 x 90.3mm
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55°C
-20 to 55°C
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90.3mm
52.9mm
Built-In Current Transformer, Built-In Contactor
RS Pro
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Voltage
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Three
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1NO/1NC
230 → 460V ac
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Overvoltage
DIN Rail or Panel
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Phase Loss
0.1 → 10s
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-20°C
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CE
84.5mm
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230V
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460V
44 x 84.5 x 75mm
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55°C
-20 to 55°C
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75mm
44mm
Phase Sequence Control, With PTC, Non-Neutral
RS Pro
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Voltage
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1
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SPDT
12 → 24V dc
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Undervoltage
DIN Rail
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0 → 30s
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L
-20°C
Screw
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17.5mm
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12V dc
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24V dc
17.5 x 66.5 x 89mm
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+60°C
+60°C
1
89mm
66.5mm
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RS Pro
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Phase, Voltage
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3
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SPDT
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Undervoltage
DIN Rail
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Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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L
-20°C
Screw
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17.5mm
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17.5 x 66.5 x 89mm
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+60°C
+60°C
1
89mm
66.5mm
2 LEDs for the Indication of Operational States, Adjustment for Time Delay, Adjustment for Undervoltage Trip Level, Detects Incorrect Phase Sequence & Phase Loss, Measures Phase to Phase Voltages, Microprocessor Based Relay, Monitors Own Supply & Detects an Undervoltage Condition on One or more Phases, True RMS Monitoring
RS Pro
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Phase
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3
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SPDT
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Overvoltage Protection, Undervoltage Protection
DIN Rail
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-20°C
Screw
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90mm
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17.5 x 90 x 66.5mm
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+60°C
-20 → +60°C
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66.5mm
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RS Pro
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Phase
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3
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SPDT
Phase Loss, Voltage Assemmetry
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DIN Rail
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-20°C
Screw
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90mm
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17.5 x 90 x 66.5mm
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+60°C
-20 → +60°C
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66.5mm
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