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, 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

€ 59.74

€ 59.74 Each (Exc. Vat)

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Available in multiples of 1
1€ 59.74
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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
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40A
100A
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-
-
0.1 → 20s
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-
-
-
-
-20°C
55°C
44mm
75mm
Error Delay Time Adjustable
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-
-
-
-
-20 to 55°C
CE
84.5mm
40 → 100A
44 x 84.5 x 75mm
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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

€ 53.84

€ 53.84 Each (Exc. Vat)

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Available in multiples of 1
1€ 53.84
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RS Pro
Voltage
-
-
1
-
-
-
CO
150 → 300V ac
Overvoltage, Undervoltage
-
-
DIN Rail
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-
-
-
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-
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-
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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

€ 53.34

€ 53.34 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 53.34
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RS Pro
Voltage
-
-
1
-
-
-
CO
150 → 300V ac
Overvoltage, Undervoltage
-
-
DIN Rail
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-
-
-
-
-
-
-
-
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-
Screw
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-
-
-
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-
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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-
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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

€ 45.81

€ 45.81 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 45.81
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RS Pro
Voltage
-
-
3
-
-
-
CO
-
Voltage Asymmetry
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-
DIN Rail
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-
-
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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

€ 38.90

€ 38.90 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 38.90
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RS Pro
Voltage
-
-
3
-
-
-
CO
-
Voltage Asymmetry
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-
DIN Rail
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-
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-
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Screw
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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

€ 54.47

€ 54.47 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 54.47
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RS Pro
Voltage
-
-
Single
-
-
-
1NO
120 → 300V ac
Overvoltage
-
-
DIN Rail Mount
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-
-
-
-
-
0.1 → 600s
-
-
-
-
-
-20°C
55°C
52.9mm
90.3mm
Built-In Current Transformer, Built-In Contactor
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-
120V
300V
-
-20 to 55°C
CE
67.5mm
-
52.9 x 67.5 x 90.3mm
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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

€ 43.30

€ 43.30 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 43.30
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RS Pro
Voltage
-
-
Three
-
-
-
1NO/1NC
230 → 460V ac
Overvoltage
-
-
DIN Rail or Panel
-
-
-
-
-
Phase Loss
0.1 → 10s
-
-
-
-
-
-20°C
55°C
44mm
75mm
Phase Sequence Control, With PTC, Non-Neutral
-
-
230V
460V
-
-20 to 55°C
CE
84.5mm
-
44 x 84.5 x 75mm
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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

€ 30.12

€ 30.12 Each (Exc. Vat)

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Available in multiples of 1
1€ 30.12
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RS Pro
Current
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-
Single
-
-
-
-
150 → 260V ac
-
-
-
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

€ 27.74

€ 27.74 Each (Exc. Vat)

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Available in multiples of 1
1€ 27.74
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RS Pro
Liquid Level
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-
Single
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-
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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)

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Available in multiples of 1
1€ 13.68
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RS Pro
Phase
-
-
Three
-
-
-
-
150 → 260V ac
-
-
-
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

€ 18.70

€ 18.70 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 18.70
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RS Pro
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

€ 18.57

€ 18.57 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 18.57
Add to basket
RS Pro
Phase
-
-
Three
-
-
-
-
380V ac
-
-
-
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

€ 23.34

€ 23.34 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 23.34
Add to basket
RS Pro
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.: 122-215Brand: RS PRO

€ 28.61

€ 28.61 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 28.61
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RS Pro
Voltage
-
-
Single
-
-
-
-
220V ac
-
-
-
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

€ 21.34

€ 21.34 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 21.34
Add to basket
RS Pro
Voltage
-
-
Single
-
-
-
-
220V ac
-
-
-
DIN Rail
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-
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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

€ 25.10

€ 25.10 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 25.10
Add to basket
RS Pro
Voltage
-
-
Three
-
-
-
-
380V ac
-
-
-
DIN Rail
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-
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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

€ 80.32

€ 80.32 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 80.32
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RS Pro
Voltage
-
-
1
-
-
-
SPDT
12 → 24V dc
Undervoltage
-
-
DIN Rail
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-
-
-
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-
0 → 30s
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L
Screw
-20°C
+60°C
66.5mm
89mm
-
-
-
12V dc
24V dc
-
+60°C
-
17.5mm
-
17.5 x 66.5 x 89mm
1
-
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

€ 87.85

€ 87.85 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 87.85
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RS Pro
Phase, Voltage
-
-
3
-
-
-
SPDT
-
Undervoltage
-
-
DIN Rail
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-
-
-
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Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
Screw
-20°C
+60°C
66.5mm
89mm
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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-
-
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+60°C
-
17.5mm
-
17.5 x 66.5 x 89mm
1
-
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

€ 126.76

€ 126.76 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 126.76
Add to basket
RS Pro
Phase
-
-
3
-
-
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
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-
-
-
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-
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-
-
-
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Screw
-20°C
+60°C
66.5mm
-
-
-
-
-
-
-
-20 → +60°C
-
90mm
-
17.5 x 90 x 66.5mm
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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

€ 145.58

€ 145.58 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 145.58
Add to basket
RS Pro
Phase
-
-
3
-
-
-
SPDT
Phase Loss, Voltage Assemmetry
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
Screw
-20°C
+60°C
66.5mm
-
-
-
-
-
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-
-20 → +60°C
-
90mm
-
17.5 x 90 x 66.5mm
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-

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