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

€ 57.60

€ 57.60 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 57.60
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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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84.5mm
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Error Delay Time Adjustable
-20°C
55°C
44 x 84.5 x 75mm
CE
-
75mm
44mm
-20 to 55°C
40 → 100A
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

€ 51.91

€ 51.91 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 51.91
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RS Pro
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-
Voltage
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-
1
-
CO
150 → 300V ac
-
Overvoltage, Undervoltage
-
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, 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

€ 51.42

€ 51.42 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 51.42
Add to basket
RS Pro
-
-
Voltage
-
-
1
-
CO
150 → 300V ac
-
Overvoltage, Undervoltage
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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.: 558-892Brand: RS PRO

€ 44.16

€ 44.16 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 44.16
Add to basket
RS Pro
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-
Voltage
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-
3
-
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
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RS Stock No.: 558-897Brand: RS PRO

€ 37.51

€ 37.51 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 37.51
Add to basket
RS Pro
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-
Voltage
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-
3
-
CO
-
-
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 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

€ 52.51

€ 52.51 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 52.51
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RS Pro
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-
Voltage
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-
Single
-
1NO
120 → 300V ac
-
Overvoltage
-
DIN Rail Mount
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-
-
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0.1 → 600s
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120V
300V
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67.5mm
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Built-In Current Transformer, Built-In Contactor
-20°C
55°C
52.9 x 67.5 x 90.3mm
CE
-
90.3mm
52.9mm
-20 to 55°C
-
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

€ 41.74

€ 41.74 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 41.74
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RS Pro
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-
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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230V
460V
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84.5mm
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Phase Sequence Control, With PTC, Non-Neutral
-20°C
55°C
44 x 84.5 x 75mm
CE
-
75mm
44mm
-20 to 55°C
-
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

€ 29.04

€ 29.04 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 29.04
Add to basket
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

€ 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
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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
-
-
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.: 132-172Brand: RS PRO

€ 17.91

€ 17.91 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 17.91
Add to basket
RS Pro
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-
Phase
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-
Three
-
-
380V ac
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-
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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
-
-
380V ac
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-
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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

€ 18.03

€ 18.03 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 18.03
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
Add to parts list
RS Stock No.: 122-215Brand: RS PRO

€ 27.59

€ 27.59 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 27.59
Add to basket
RS Pro
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-
Voltage
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-
Single
-
-
220V ac
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-
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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.: 122-210Brand: RS PRO

€ 20.57

€ 20.57 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 20.57
Add to basket
RS Pro
-
-
Voltage
-
-
Single
-
-
220V ac
-
-
-
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

€ 24.20

€ 24.20 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 24.20
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

€ 77.44

€ 77.44 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 77.44
Add to basket
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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-
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L
Screw
12V dc
24V dc
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-
-
17.5mm
1
-
-20°C
+60°C
17.5 x 66.5 x 89mm
-
-
89mm
66.5mm
+60°C
-
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

€ 84.70

€ 84.70 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 84.70
Add to basket
RS Pro
-
-
Phase, Voltage
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-
3
-
SPDT
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-
Undervoltage
-
DIN Rail
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-
-
-
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Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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L
Screw
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-
-
-
-
17.5mm
1
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
+60°C
17.5 x 66.5 x 89mm
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-
89mm
66.5mm
+60°C
-
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

€ 122.21

€ 122.21 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 122.21
Add to basket
RS Pro
-
-
Phase
-
-
3
-
SPDT
-
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Overvoltage Protection, Undervoltage Protection
-
DIN Rail
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-
-
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Screw
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90mm
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-
-20°C
+60°C
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

€ 140.36

€ 140.36 Each (Exc. Vat)

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1

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

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