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

€ 52.03

€ 52.03 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 52.03
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RS Pro
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Voltage
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1
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150 → 300V ac
CO
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Overvoltage, Undervoltage
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DIN Rail
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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Screw
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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

€ 51.67

€ 51.67 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 51.67
Add to basket
RS Pro
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Voltage
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1
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-
150 → 300V ac
CO
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Overvoltage, Undervoltage
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DIN Rail
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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Screw
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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

€ 37.63

€ 37.63 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 37.63
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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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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Screw
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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

€ 44.29

€ 44.29 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 44.29
Add to basket
RS Pro
-
Voltage
-
3
-
-
-
CO
-
Voltage Asymmetry
-
-
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DIN Rail
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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Screw
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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

€ 29.16

€ 29.16 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 29.16
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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 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

€ 26.74

€ 26.74 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 26.74
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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
Add to parts list
RS Stock No.: 122-217Brand: RS PRO

€ 13.19

€ 13.19 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 13.19
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.: 132-172Brand: RS PRO

€ 18.03

€ 18.03 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 18.03
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

€ 22.51

€ 22.51 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 22.51
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.: 122-216Brand: RS PRO

€ 18.15

€ 18.15 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 18.15
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, 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

€ 20.69

€ 20.69 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 20.69
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

€ 27.59

€ 27.59 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 27.59
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, 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

€ 24.32

€ 24.32 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 24.32
Add to basket
RS Pro
-
Voltage
-
Three
-
-
380V ac
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-
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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

€ 78.04

€ 78.04 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 78.04
Add to basket
RS Pro
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Voltage
-
1
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-
12 → 24V dc
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
17.5mm
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66.5mm
1
Screw
17.5 x 66.5 x 89mm
+60°C
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-20°C
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12V dc
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24V dc
89mm
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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

€ 85.30

€ 85.30 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 85.30
Add to basket
RS Pro
-
Phase, Voltage
-
3
-
-
-
SPDT
-
Undervoltage
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-
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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
17.5mm
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66.5mm
1
Screw
17.5 x 66.5 x 89mm
+60°C
-
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
-20°C
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89mm
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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

€ 123.42

€ 123.42 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 123.42
Add to basket
RS Pro
-
Phase
-
3
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-
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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+60°C
90mm
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66.5mm
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Screw
17.5 x 90 x 66.5mm
-20 → +60°C
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-20°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

€ 140.36

€ 140.36 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 140.36
Add to basket
RS Pro
-
Phase
-
3
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-
Phase Loss, Voltage Assemmetry
SPDT
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-
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DIN Rail
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+60°C
90mm
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66.5mm
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Screw
17.5 x 90 x 66.5mm
-20 → +60°C
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-20°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

€ 81.07

€ 81.07 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 81.07
Add to basket
RS Pro
-
Phase, Voltage
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3
-
-
Maximum of 280 V
SPDT
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Undervoltage
-
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DIN Rail
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-
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Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
+60°C
17.5mm
-
66.5mm
1
Screw
17.5 x 66.5 x 89mm
+60°C
-
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
-20°C
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280V
89mm
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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

€ 160.93

€ 160.93 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 160.93
Add to basket
RS Pro
-
Voltage
-
3
-
-
-
DPDT
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Overvoltage Protection, Undervoltage Protection
-
-
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DIN Rail
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2 → 999s
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+60°C
36mm
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66.21mm
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Screw
36 x 90 x 67mm
-10 → +60°C
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-10°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.: 223-7790Brand: RS PRO

€ 173.03

€ 173.03 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 173.03
Add to basket
RS Pro
-
Voltage
-
3
-
-
-
DPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
-
DIN Rail
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-
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2 → 999s
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+60°C
36mm
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66.21mm
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Screw
36 x 90 x 67mm
-10 → +60°C
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-10°C
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90mm
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