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 1274 products
P.O.A.
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RS Pro
Current
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Three
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1NO/1NC
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DIN Rail Mount
40A
100A
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0.1 → 20s
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-20°C
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Error Delay Time Adjustable
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40 → 100A
44 x 84.5 x 75mm
84.5mm
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55°C
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75mm
CE
-20 to 55°C
44mm
P.O.A.
Check stock
1
RS Pro
Voltage
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1
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CO
150 → 300V ac
Overvoltage, Undervoltage
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DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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P.O.A.
Check stock
1
RS Pro
Voltage
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1
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CO
150 → 300V ac
Overvoltage, Undervoltage
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DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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P.O.A.
Check stock
1
RS Pro
Voltage
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3
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CO
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Voltage Asymmetry
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DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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P.O.A.
Check stock
1
RS Pro
Voltage
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3
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CO
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Voltage Asymmetry
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DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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P.O.A.
Check stock
1
RS Pro
Voltage
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Single
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1NO
120 → 300V ac
Overvoltage
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DIN Rail Mount
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0.1 → 600s
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-20°C
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Built-In Current Transformer, Built-In Contactor
300V
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120V
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52.9 x 67.5 x 90.3mm
67.5mm
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55°C
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90.3mm
CE
-20 to 55°C
52.9mm
P.O.A.
Check stock
1
RS Pro
Voltage
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Three
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1NO/1NC
230 → 460V ac
Overvoltage
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DIN Rail or Panel
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Phase Loss
0.1 → 10s
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-20°C
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Phase Sequence Control, With PTC, Non-Neutral
460V
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230V
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44 x 84.5 x 75mm
84.5mm
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55°C
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75mm
CE
-20 to 55°C
44mm
SR 171.41
SR 171.41 Each (ex VAT)
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1
SR 157.47
SR 157.47 Each (ex VAT)
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1
SR 80.49
SR 80.49 Each (ex VAT)
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1
SR 108.87
SR 108.87 Each (ex VAT)
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1
SR 136.79
SR 136.79 Each (ex VAT)
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1
SR 109.66
SR 109.66 Each (ex VAT)
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1
SR 166.08
SR 166.08 Each (ex VAT)
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1
SR 125.18
SR 125.18 Each (ex VAT)
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1
SR 147.08
SR 147.08 Each (ex VAT)
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1
SR 461.56
SR 461.56 Each (ex VAT)
Check stock
1
RS Pro
Voltage
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1
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SPDT
12 → 24V dc
Undervoltage
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DIN Rail
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0 → 30s
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L
-20°C
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24V dc
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12V dc
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17.5 x 66.5 x 89mm
17.5mm
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+60°C
Screw
89mm
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+60°C
66.5mm
SR 503.47
SR 503.47 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
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3
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SPDT
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Undervoltage
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DIN Rail
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Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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-20°C
1
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
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17.5 x 66.5 x 89mm
17.5mm
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+60°C
Screw
89mm
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+60°C
66.5mm
SR 830.22
SR 830.22 Each (ex VAT)
Check stock
1
RS Pro
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
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17.5 x 90 x 66.5mm
90mm
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+60°C
Screw
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-20 → +60°C
66.5mm
SR 481.04
SR 481.04 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
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3
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SPDT
Maximum of 280 V
Undervoltage
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DIN Rail
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Phase Failure, Phase Sequence
100ms
48 → 63Hz
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-20°C
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2 LEDs for the Indication of Operational States, Detects Incorrect Phase Sequence & Phase Loss, Fixed Time Delay, Fixed Undervoltage Trip Level, Measures Phase to Phase Voltages, Microprocessor Based Relay, Monitors Own Supply & Detects an Undervoltage Condition on One or more Phases, True RMS Monitoring
280V
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17.5 x 66.5 x 89mm
17.5mm
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+60°C
Screw
89mm
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+60°C
66.5mm
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