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 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

€ 53.96

€ 53.96 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 53.96
Add to basket
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 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

€ 53.59

€ 53.59 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 53.59
Add to basket
RS Pro
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-
Voltage
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1
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-
CO
150 → 300V ac
-
Overvoltage, Undervoltage
DIN Rail
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Screw
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

€ 45.93

€ 45.93 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 45.93
Add to basket
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 Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
Add to parts list
RS Stock No.: 558-897Brand: RS PRO

€ 39.03

€ 39.03 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 39.03
Add to basket
RS Pro
-
-
Voltage
-
3
-
-
CO
-
-
Voltage Asymmetry
DIN Rail
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Screw
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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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

€ 30.25

€ 30.25 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 30.25
Add to basket
RS Pro
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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

€ 59.99

€ 59.99 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 59.99
Add to basket
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 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

€ 27.74

€ 27.74 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 27.74
Add to basket
RS Pro
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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

€ 13.68

€ 13.68 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 13.68
Add to basket
RS Pro
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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

€ 18.82

€ 18.82 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 18.82
Add to basket
RS Pro
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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
Add to parts list
RS Stock No.: 132-172Brand: RS PRO

€ 18.70

€ 18.70 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 18.70
Add to basket
RS Pro
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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
Add to parts list
RS Stock No.: 132-173Brand: RS PRO

€ 23.34

€ 23.34 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 23.34
Add to basket
RS Pro
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Phase
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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, Single Phase, 1NO, 120 → 300V ac, DIN Rail Mount
RS PRO Voltage Monitoring Relay, Single Phase, 1NO, 120 → 300V ac, DIN Rail Mount
Add to parts list
RS Stock No.: 434-521Brand: RS PRO

€ 54.72

€ 54.72 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 54.72
Add to basket
RS Pro
-
-
Voltage
-
Single
-
-
1NO
120 → 300V ac
-
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 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

€ 21.46

€ 21.46 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 21.46
Add to basket
RS Pro
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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
Add to parts list
RS Stock No.: 122-215Brand: RS PRO

€ 28.61

€ 28.61 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 28.61
Add to basket
RS Pro
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-
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
Add to parts list
RS Stock No.: 434-520Brand: RS PRO

€ 43.55

€ 43.55 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 43.55
Add to basket
RS Pro
-
-
Voltage
-
Three
-
-
1NO/1NC
230 → 460V ac
-
Overvoltage
DIN Rail or Panel
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-
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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 Voltage Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS PRO Voltage Monitoring Relay, Three Phase, 380V ac, DIN Rail
Add to parts list
RS Stock No.: 122-212Brand: RS PRO

€ 25.23

€ 25.23 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 25.23
Add to basket
RS Pro
-
-
Voltage
-
Three
-
-
-
380V ac
-
-
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
Add to parts list
RS Stock No.: 102-6130Brand: RS PRO

€ 80.95

€ 80.95 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 80.95
Add to basket
RS Pro
-
-
Voltage
-
1
-
-
SPDT
12 → 24V dc
-
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
-
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
Add to parts list
RS Stock No.: 102-6136Brand: RS PRO

€ 88.48

€ 88.48 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 88.48
Add to basket
RS Pro
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-
Phase, Voltage
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3
-
-
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
-
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 Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
Add to parts list
RS Stock No.: 223-7792Brand: RS PRO

€ 128.01

€ 128.01 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 128.01
Add to basket
RS Pro
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-
Phase
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3
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-
SPDT
-
-
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
-
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
Add to parts list
RS Stock No.: 223-7795Brand: RS PRO

€ 145.58

€ 145.58 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 145.58
Add to basket
RS Pro
-
-
Phase
-
3
-
-
SPDT
Phase Loss, Voltage Assemmetry
-
-
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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