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

€ 53.32

€ 53.32 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 53.32
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RS Pro
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Voltage
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1
150 → 300V ac
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CO
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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

€ 52.95

€ 52.95 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 52.95
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RS Pro
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Voltage
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1
150 → 300V ac
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CO
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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.: 558-897Brand: RS PRO

€ 38.56

€ 38.56 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 38.56
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
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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
Add to parts list
RS Stock No.: 558-892Brand: RS PRO

€ 45.38

€ 45.38 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 45.38
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
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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 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

€ 29.88

€ 29.88 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 29.88
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RS Pro
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Current
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Single
150 → 260V ac
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DIN Rail
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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

€ 27.40

€ 27.40 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 27.40
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RS Pro
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Liquid Level
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Single
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
Add to parts list
RS Stock No.: 122-217Brand: RS PRO

€ 13.52

€ 13.52 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 13.52
Add to basket
RS Pro
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Phase
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Three
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

€ 18.60

€ 18.60 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 18.60
Add to basket
RS Pro
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Phase
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Three
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

€ 18.48

€ 18.48 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 18.48
Add to basket
RS Pro
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Phase
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Three
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

€ 23.06

€ 23.06 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 23.06
Add to basket
RS Pro
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Phase
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Three
380V 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.: 122-210Brand: RS PRO

€ 21.20

€ 21.20 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 21.20
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RS Pro
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Voltage
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Single
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

€ 28.27

€ 28.27 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 28.27
Add to basket
RS Pro
-
Voltage
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Single
220V ac
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DIN Rail
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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
Add to parts list
RS Stock No.: 122-212Brand: RS PRO

€ 24.92

€ 24.92 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 24.92
Add to basket
RS Pro
-
Voltage
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-
Three
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

€ 79.98

€ 79.98 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 79.98
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RS Pro
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Voltage
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-
1
12 → 24V dc
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SPDT
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Undervoltage
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DIN Rail
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0 → 30s
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L
+60°C
Screw
-20°C
17.5mm
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12V dc
24V dc
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17.5 x 66.5 x 89mm
89mm
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66.5mm
+60°C
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1
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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
Add to parts list
RS Stock No.: 102-6136Brand: RS PRO

€ 87.42

€ 87.42 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 87.42
Add to basket
RS Pro
-
Phase, Voltage
-
-
-
3
-
-
SPDT
-
Undervoltage
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DIN Rail
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Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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L
+60°C
Screw
-20°C
17.5mm
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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
17.5 x 66.5 x 89mm
89mm
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66.5mm
+60°C
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1
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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

€ 126.48

€ 126.48 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 126.48
Add to basket
RS Pro
-
Phase
-
-
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3
-
-
SPDT
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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+60°C
Screw
-20°C
90mm
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17.5 x 90 x 66.5mm
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66.5mm
-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
Add to parts list
RS Stock No.: 223-7795Brand: RS PRO

€ 143.84

€ 143.84 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 143.84
Add to basket
RS Pro
-
Phase
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-
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3
Phase Loss, Voltage Assemmetry
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SPDT
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DIN Rail
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+60°C
Screw
-20°C
90mm
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17.5 x 90 x 66.5mm
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66.5mm
-20 → +60°C
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RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, Maximum of 280 V, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, Maximum of 280 V, DIN Rail
Add to parts list
RS Stock No.: 102-6135Brand: RS PRO

€ 83.08

€ 83.08 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 83.08
Add to basket
RS Pro
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Phase, Voltage
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-
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3
Maximum of 280 V
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SPDT
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Undervoltage
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DIN Rail
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Phase Failure, Phase Sequence
100ms
48 → 63Hz
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L
+60°C
Screw
-20°C
17.5mm
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280V
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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
17.5 x 66.5 x 89mm
89mm
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66.5mm
+60°C
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1
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RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
Add to parts list
RS Stock No.: 223-7790Brand: RS PRO

€ 177.32

€ 177.32 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 177.32
Add to basket
RS Pro
-
Voltage
-
-
-
3
-
-
DPDT
-
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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+60°C
Screw
-10°C
36mm
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36 x 90 x 67mm
90mm
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66.21mm
-10 → +60°C
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RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
Add to parts list
RS Stock No.: 223-7789Brand: RS PRO

€ 164.92

€ 164.92 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 164.92
Add to basket
RS Pro
-
Voltage
-
-
-
3
-
-
DPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
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2 → 999s
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+60°C
Screw
-10°C
36mm
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36 x 90 x 67mm
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66.21mm
-10 → +60°C
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