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

€ 59.02

€ 59.02 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 59.02
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RS Pro
Current
-
-
Three
-
-
-
1NO/1NC
-
-
-
-
DIN Rail Mount
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40A
100A
-
-
-
0.1 → 20s
-
-
-
-
-20 to 55°C
55°C
CE
75mm
Error Delay Time Adjustable
-
-20°C
84.5mm
-
-
-
-
-
-
-
44 x 84.5 x 75mm
40 → 100A
44mm
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

€ 53.20

€ 53.20 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 53.20
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RS Pro
Voltage
-
-
1
-
-
-
CO
150 → 300V ac
Overvoltage, Undervoltage
-
-
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

€ 52.70

€ 52.70 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 52.70
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RS Pro
Voltage
-
-
1
-
-
-
CO
150 → 300V ac
Overvoltage, Undervoltage
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
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.: 558-892Brand: RS PRO

€ 45.26

€ 45.26 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 45.26
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RS Pro
Voltage
-
-
3
-
-
-
CO
-
Voltage Asymmetry
-
-
DIN Rail
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-
-
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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-
-
-
-
Screw
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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.: 558-897Brand: RS PRO

€ 38.44

€ 38.44 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 38.44
Add to basket
RS Pro
Voltage
-
-
3
-
-
-
CO
-
Voltage Asymmetry
-
-
DIN Rail
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-
-
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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-
-
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Screw
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-
-
-
-
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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

€ 53.82

€ 53.82 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 53.82
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RS Pro
Voltage
-
-
Single
-
-
-
1NO
120 → 300V ac
Overvoltage
-
-
DIN Rail Mount
-
-
-
-
-
-
0.1 → 600s
-
-
-
-
-20 to 55°C
55°C
CE
90.3mm
Built-In Current Transformer, Built-In Contactor
-
-20°C
67.5mm
-
-
-
-
-
300V
120V
52.9 x 67.5 x 90.3mm
-
52.9mm
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

€ 42.78

€ 42.78 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 42.78
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RS Pro
Voltage
-
-
Three
-
-
-
1NO/1NC
230 → 460V ac
Overvoltage
-
-
DIN Rail or Panel
-
-
-
-
-
Phase Loss
0.1 → 10s
-
-
-
-
-20 to 55°C
55°C
CE
75mm
Phase Sequence Control, With PTC, Non-Neutral
-
-20°C
84.5mm
-
-
-
-
-
460V
230V
44 x 84.5 x 75mm
-
44mm
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

€ 29.76

€ 29.76 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 29.76
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RS Pro
Current
-
-
Single
-
-
-
-
150 → 260V ac
-
-
-
DIN Rail
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-
-
-
-
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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
Liquid Level
-
-
Single
-
-
-
-
150 → 260V ac
-
-
-
DIN Rail
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-
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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

€ 13.52

€ 13.52 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 13.52
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RS Pro
Phase
-
-
Three
-
-
-
-
150 → 260V ac
-
-
-
DIN Rail
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-
-
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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

€ 18.48

€ 18.48 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 18.48
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RS Pro
Phase
-
-
Three
-
-
-
-
380V ac
-
-
-
DIN Rail
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-
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-
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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

€ 18.35

€ 18.35 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 18.35
Add to basket
RS Pro
Phase
-
-
Three
-
-
-
-
380V ac
-
-
-
DIN Rail
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-
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-
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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
Phase
-
-
Three
-
-
-
-
380V 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.: 122-215Brand: RS PRO

€ 28.27

€ 28.27 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 28.27
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RS Pro
Voltage
-
-
Single
-
-
-
-
220V ac
-
-
-
DIN Rail
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-
-
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-
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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

€ 21.08

€ 21.08 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 21.08
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
Add to parts list
RS Stock No.: 122-212Brand: RS PRO

€ 24.80

€ 24.80 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 24.80
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
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RS Stock No.: 102-6130Brand: RS PRO

€ 79.36

€ 79.36 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 79.36
Add to basket
RS Pro
Voltage
-
-
1
-
-
-
SPDT
12 → 24V dc
Undervoltage
-
-
DIN Rail
-
-
-
-
-
-
0 → 30s
-
-
-
L
+60°C
+60°C
-
89mm
-
-
-20°C
17.5mm
Screw
1
-
-
-
24V dc
12V dc
17.5 x 66.5 x 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

€ 86.80

€ 86.80 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 86.80
Add to basket
RS Pro
Phase, Voltage
-
-
3
-
-
-
SPDT
-
Undervoltage
-
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
+60°C
+60°C
-
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
-
-20°C
17.5mm
Screw
1
-
-
-
-
-
17.5 x 66.5 x 89mm
-
66.5mm
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

€ 125.24

€ 125.24 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 125.24
Add to basket
RS Pro
Phase
-
-
3
-
-
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-20 → +60°C
+60°C
-
-
-
-
-20°C
90mm
Screw
-
-
-
-
-
-
17.5 x 90 x 66.5mm
-
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

€ 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
-
-
3
-
-
-
SPDT
Phase Loss, Voltage Assemmetry
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-20 → +60°C
+60°C
-
-
-
-
-20°C
90mm
Screw
-
-
-
-
-
-
17.5 x 90 x 66.5mm
-
66.5mm

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