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

€ 46.22

€ 46.22 Each (Exc. VAT)

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Available in multiples of 1
1€ 46.22
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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
40A
100A
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-
-
0.1 → 20s
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-
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40 → 100A
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CE
44mm
-20 to 55°C
-20°C
-
-
-
-
-
Error Delay Time Adjustable
75mm
44 x 84.5 x 75mm
55°C
-
-
84.5mm
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

€ 41.63

€ 41.63 Each (Exc. VAT)

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Available in multiples of 1
1€ 41.63
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RS Pro
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Voltage
-
-
1
-
CO
-
150 → 300V ac
-
Overvoltage, Undervoltage
-
-
DIN Rail
-
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-
-
-
-
-
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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

€ 41.30

€ 41.30 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 41.30
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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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-
-
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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.: 558-892Brand: RS PRO

€ 35.41

€ 35.41 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 35.41
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RS Pro
-
Voltage
-
-
3
-
CO
-
-
-
Voltage Asymmetry
-
-
DIN Rail
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-
-
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-
-
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-
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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

€ 30.10

€ 30.10 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 30.10
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RS Pro
-
Voltage
-
-
3
-
CO
-
-
-
Voltage Asymmetry
-
-
DIN Rail
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-
-
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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Screw
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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

€ 42.16

€ 42.16 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 42.16
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RS Pro
-
Voltage
-
-
Single
-
1NO
-
120 → 300V ac
-
Overvoltage
-
-
DIN Rail Mount
-
-
-
-
-
0.1 → 600s
-
-
-
-
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CE
52.9mm
-20 to 55°C
-20°C
-
-
120V
-
300V
Built-In Current Transformer, Built-In Contactor
90.3mm
52.9 x 67.5 x 90.3mm
55°C
-
-
67.5mm
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

€ 33.53

€ 33.53 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 33.53
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RS Pro
-
Voltage
-
-
Three
-
1NO/1NC
-
230 → 460V ac
-
Overvoltage
-
-
DIN Rail or Panel
-
-
-
-
Phase Loss
0.1 → 10s
-
-
-
-
-
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CE
44mm
-20 to 55°C
-20°C
-
-
230V
-
460V
Phase Sequence Control, With PTC, Non-Neutral
75mm
44 x 84.5 x 75mm
55°C
-
-
84.5mm
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

€ 23.30

€ 23.30 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 23.30
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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

€ 21.41

€ 21.41 Each (Exc. VAT)

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Available in multiples of 1
1€ 21.41
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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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-
-
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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

€ 10.56

€ 10.56 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 10.56
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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

€ 14.50

€ 14.50 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 14.50
Add to basket
RS Pro
-
Phase
-
-
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
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RS Stock No.: 132-172Brand: RS PRO

€ 14.40

€ 14.40 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 14.40
Add to basket
RS Pro
-
Phase
-
-
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

€ 18.03

€ 18.03 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 18.03
Add to basket
RS Pro
-
Phase
-
-
Three
-
-
-
380V 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
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RS Stock No.: 122-215Brand: RS PRO

€ 22.11

€ 22.11 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 22.11
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RS Pro
-
Voltage
-
-
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
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RS Stock No.: 122-210Brand: RS PRO

€ 16.54

€ 16.54 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 16.54
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
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RS Stock No.: 122-212Brand: RS PRO

€ 19.44

€ 19.44 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 19.44
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

€ 62.38

€ 62.38 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 62.38
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RS Pro
-
Voltage
-
-
1
-
SPDT
-
12 → 24V dc
-
Undervoltage
-
-
DIN Rail
-
-
-
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0 → 30s
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L
-
1
-
66.5mm
+60°C
-20°C
-
-
12V dc
-
24V dc
-
89mm
17.5 x 66.5 x 89mm
+60°C
-
Screw
17.5mm
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

€ 68.05

€ 68.05 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 68.05
Add to basket
RS Pro
-
Phase, Voltage
-
-
3
-
SPDT
-
-
-
Undervoltage
-
-
DIN Rail
-
-
-
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Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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-
L
-
1
-
66.5mm
+60°C
-20°C
-
-
-
-
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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
89mm
17.5 x 66.5 x 89mm
+60°C
-
Screw
17.5mm
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

€ 98.21

€ 98.21 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 98.21
Add to basket
RS Pro
-
Phase
-
-
3
-
SPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
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-
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66.5mm
-20 → +60°C
-20°C
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17.5 x 90 x 66.5mm
+60°C
-
Screw
90mm
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

€ 112.38

€ 112.38 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 112.38
Add to basket
RS Pro
-
Phase
-
-
3
-
SPDT
-
Phase Loss, Voltage Assemmetry
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
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-
66.5mm
-20 → +60°C
-20°C
-
-
-
-
-
-
-
17.5 x 90 x 66.5mm
+60°C
-
Screw
90mm

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