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...

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RS PRO Current Monitoring Relay, Single Phase, 150 → 260V ac, DIN Rail
RS PRO Current Monitoring Relay, Single Phase, 150 → 260V ac, DIN Rail
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RS Stock No.: 132-174Brand: RS PRO

€ 23.72

€ 23.72 Each (Exc. VAT)

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1€ 23.72
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RS Pro
Current
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Single
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150 → 260V ac
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DIN Rail
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RS PRO Current Monitoring Relay, Three Phase, 1NO/1NC, DIN Rail Mount
RS PRO Current Monitoring Relay, Three Phase, 1NO/1NC, DIN Rail Mount
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RS Stock No.: 434-506Brand: RS PRO

€ 47.05

€ 47.05 Each (Exc. VAT)

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Available in multiples of 1
1€ 47.05
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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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55°C
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75mm
84.5mm
-20°C
44 x 84.5 x 75mm
CE
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Error Delay Time Adjustable
-20 to 55°C
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40 → 100A
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RS PRO Liquid Level Monitoring Relay, Single Phase, 150 → 260V ac, DIN Rail
RS PRO Liquid Level Monitoring Relay, Single Phase, 150 → 260V ac, DIN Rail
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RS Stock No.: 132-171Brand: RS PRO

€ 21.80

€ 21.80 Each (Exc. VAT)

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1€ 21.80
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RS Pro
Liquid Level
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Single
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150 → 260V ac
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DIN Rail
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RS PRO Phase Monitoring Relay, Three Phase, 150 → 260V ac, DIN Rail
RS PRO Phase Monitoring Relay, Three Phase, 150 → 260V ac, DIN Rail
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RS Stock No.: 122-217Brand: RS PRO

€ 10.75

€ 10.75 Each (Exc. VAT)

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Available in multiples of 1
1€ 10.75
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RS Pro
Phase
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Three
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150 → 260V ac
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DIN Rail
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RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
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RS Stock No.: 122-216Brand: RS PRO

€ 14.77

€ 14.77 Each (Exc. VAT)

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Available in multiples of 1
1€ 14.77
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RS Pro
Phase
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Three
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380V ac
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DIN Rail
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RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
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RS Stock No.: 132-172Brand: RS PRO

€ 14.66

€ 14.66 Each (Exc. VAT)

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Available in multiples of 1
1€ 14.66
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RS Pro
Phase
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Three
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380V ac
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DIN Rail
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RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
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RS Stock No.: 132-173Brand: RS PRO

€ 18.36

€ 18.36 Each (Exc. VAT)

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Available in multiples of 1
1€ 18.36
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RS Pro
Phase
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Three
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380V ac
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DIN Rail
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RS PRO Phase, Voltage Monitoring Relay, Single Phase, CO, 270 → 370, 410 → 510V ac, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, Single Phase, CO, 270 → 370, 410 → 510V ac, DIN Rail
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RS Stock No.: 558-898Brand: RS PRO

€ 42.38

€ 42.38 Each (Exc. VAT)

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Available in multiples of 1
1€ 42.38
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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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RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, 150 → 210, 240 → 300V ac, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, 150 → 210, 240 → 300V ac, DIN Rail
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RS Stock No.: 558-901Brand: RS PRO

€ 42.04

€ 42.04 Each (Exc. VAT)

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Available in multiples of 1
1€ 42.04
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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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RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
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RS Stock No.: 558-892Brand: RS PRO

€ 36.05

€ 36.05 Each (Exc. VAT)

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Available in multiples of 1
1€ 36.05
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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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RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
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RS Stock No.: 558-897Brand: RS PRO

€ 30.64

€ 30.64 Each (Exc. VAT)

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Available in multiples of 1
1€ 30.64
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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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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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RS PRO Voltage Monitoring Relay, Single Phase, 1NO, 120 → 300V ac, DIN Rail Mount
RS PRO Voltage Monitoring Relay, Single Phase, 1NO, 120 → 300V ac, DIN Rail Mount
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RS Stock No.: 434-521Brand: RS PRO

€ 42.92

€ 42.92 Each (Exc. VAT)

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Available in multiples of 1
1€ 42.92
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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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55°C
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90.3mm
67.5mm
-20°C
52.9 x 67.5 x 90.3mm
CE
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Built-In Current Transformer, Built-In Contactor
-20 to 55°C
300V
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120V
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RS PRO Voltage Monitoring Relay, Single Phase, 220V ac, DIN Rail
RS PRO Voltage Monitoring Relay, Single Phase, 220V ac, DIN Rail
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RS Stock No.: 122-210Brand: RS PRO

€ 16.84

€ 16.84 Each (Exc. VAT)

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Available in multiples of 1
1€ 16.84
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RS Pro
Voltage
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Single
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220V ac
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DIN Rail
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RS PRO Voltage Monitoring Relay, Single Phase, 220V ac, DIN Rail
RS PRO Voltage Monitoring Relay, Single Phase, 220V ac, DIN Rail
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RS Stock No.: 122-215Brand: RS PRO

€ 22.50

€ 22.50 Each (Exc. VAT)

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1€ 22.50
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RS Pro
Voltage
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Single
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220V ac
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DIN Rail
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RS PRO Voltage Monitoring Relay, Three Phase, 1NO/1NC, 230 → 460V ac, DIN Rail or Panel
RS PRO Voltage Monitoring Relay, Three Phase, 1NO/1NC, 230 → 460V ac, DIN Rail or Panel
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RS Stock No.: 434-520Brand: RS PRO

€ 34.14

€ 34.14 Each (Exc. VAT)

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Available in multiples of 1
1€ 34.14
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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
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0.1 → 10s
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55°C
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75mm
84.5mm
-20°C
44 x 84.5 x 75mm
CE
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Phase Sequence Control, With PTC, Non-Neutral
-20 to 55°C
460V
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230V
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RS PRO Voltage Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS PRO Voltage Monitoring Relay, Three Phase, 380V ac, DIN Rail
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RS Stock No.: 122-212Brand: RS PRO

€ 19.80

€ 19.80 Each (Exc. VAT)

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Available in multiples of 1
1€ 19.80
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RS Pro
Voltage
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Three
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380V ac
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DIN Rail
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RS PRO Voltage Monitoring Relay, 1 Phase, SPDT, 12 → 24V dc, DIN Rail
RS PRO Voltage Monitoring Relay, 1 Phase, SPDT, 12 → 24V dc, DIN Rail
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RS Stock No.: 102-6130Brand: RS PRO

€ 63.51

€ 63.51 Each (Exc. VAT)

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1€ 63.51
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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
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+60°C
Screw
89mm
17.5mm
-20°C
17.5 x 66.5 x 89mm
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1
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+60°C
24V dc
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12V dc
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RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
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RS Stock No.: 102-6136Brand: RS PRO

€ 69.28

€ 69.28 Each (Exc. VAT)

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1€ 69.28
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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
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0.2 → 10s
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48 → 63Hz
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L
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+60°C
Screw
89mm
17.5mm
-20°C
17.5 x 66.5 x 89mm
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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
+60°C
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RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
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RS Stock No.: 223-7792Brand: RS PRO

€ 99.98

€ 99.98 Each (Exc. VAT)

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1€ 99.98
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RS Pro
Phase
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3
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SPDT
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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+60°C
Screw
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90mm
-20°C
17.5 x 90 x 66.5mm
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-20 → +60°C
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RS PRO Phase Monitoring Relay, 3 Phase, SPDT, Phase Loss, Voltage Assemmetry, DIN Rail
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, Phase Loss, Voltage Assemmetry, DIN Rail
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RS Stock No.: 223-7795Brand: RS PRO

€ 114.40

€ 114.40 Each (Exc. VAT)

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Available in multiples of 1
1€ 114.40
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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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+60°C
Screw
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90mm
-20°C
17.5 x 90 x 66.5mm
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-20 → +60°C
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