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...

Showing 1-20 of 1256 products

Filter

Sort

Filter

Sort

Relevance
Price (high-low)
Price (low-high)
RS PRO Current Monitoring Relay, Single Phase, 150 → 260V ac, DIN Rail
RS PRO Current Monitoring Relay, Single Phase, 150 → 260V ac, DIN Rail
Add to parts list
RS Stock No.: 132-174Brand: RS PRO

AED 128.81

AED 128.81 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 128.81
Add to basket
RS Pro
-
-
-
Current
Single
-
-
-
150 → 260V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
RS PRO Current Monitoring Relay, Three Phase, 1NO/1NC, DIN Rail Mount
RS PRO Current Monitoring Relay, Three Phase, 1NO/1NC, DIN Rail Mount
Add to parts list
RS Stock No.: 434-506Brand: RS PRO

AED 261.16

AED 261.16 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 261.16
Add to basket
RS Pro
-
-
-
Current
Three
-
-
1NO/1NC
-
-
-
-
DIN Rail Mount
-
-
40A
-
100A
-
-
-
0.1 → 20s
-
-
-
-
-
-
-
-
-
-
-
55°C
-
84.5mm
75mm
Error Delay Time Adjustable
CE
-
-20 to 55°C
-
44 x 84.5 x 75mm
44mm
40 → 100A
-
-
-
-
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
Add to parts list
RS Stock No.: 132-171Brand: RS PRO

AED 119.43

AED 119.43 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 119.43
Add to basket
RS Pro
-
-
-
Liquid Level
Single
-
-
-
150 → 260V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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

AED 58.20

AED 58.20 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 58.20
Add to basket
RS Pro
-
-
-
Phase
Three
-
-
-
150 → 260V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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

AED 79.88

AED 79.88 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 79.88
Add to basket
RS Pro
-
-
-
Phase
Three
-
-
-
380V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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.: 132-172Brand: RS PRO

AED 79.32

AED 79.32 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 79.32
Add to basket
RS Pro
-
-
-
Phase
Three
-
-
-
380V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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

AED 99.32

AED 99.32 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 99.32
Add to basket
RS Pro
-
-
-
Phase
Three
-
-
-
380V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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
Add to parts list
RS Stock No.: 558-898Brand: RS PRO

AED 229.41

AED 229.41 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 229.41
Add to basket
RS Pro
-
-
-
Voltage
1
-
-
CO
150 → 300V ac
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
Screw
-
-
-
-
-
-
-
-
-
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
Add to parts list
RS Stock No.: 558-901Brand: RS PRO

AED 227.57

AED 227.57 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 227.57
Add to basket
RS Pro
-
-
-
Voltage
1
-
-
CO
150 → 300V ac
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
Screw
-
-
-
-
-
-
-
-
-
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

AED 195.10

AED 195.10 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 195.10
Add to basket
RS Pro
-
-
-
Voltage
3
-
-
CO
-
-
Voltage Asymmetry
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
Screw
-
-
-
-
-
-
-
-
-
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.: 558-897Brand: RS PRO

AED 165.83

AED 165.83 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 165.83
Add to basket
RS Pro
-
-
-
Voltage
3
-
-
CO
-
-
Voltage Asymmetry
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
Screw
-
-
-
-
-
-
-
-
-
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
Add to parts list
RS Stock No.: 434-521Brand: RS PRO

AED 232.28

AED 232.28 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 232.28
Add to basket
RS Pro
-
-
-
Voltage
Single
-
-
1NO
120 → 300V ac
-
Overvoltage
-
DIN Rail Mount
-
-
-
-
-
-
-
-
0.1 → 600s
-
-
-
-
-
-
-
-
-
-
-
55°C
-
67.5mm
90.3mm
Built-In Current Transformer, Built-In Contactor
CE
-
-20 to 55°C
-
52.9 x 67.5 x 90.3mm
52.9mm
-
300V
-
120V
-
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

AED 121.79

AED 121.79 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 121.79
Add to basket
RS Pro
-
-
-
Voltage
Single
-
-
-
220V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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

AED 91.17

AED 91.17 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 91.17
Add to basket
RS Pro
-
-
-
Voltage
Single
-
-
-
220V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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
Add to parts list
RS Stock No.: 434-520Brand: RS PRO

AED 184.76

AED 184.76 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 184.76
Add to basket
RS Pro
-
-
-
Voltage
Three
-
-
1NO/1NC
230 → 460V ac
-
Overvoltage
-
DIN Rail or Panel
-
-
-
-
-
-
Phase Loss
-
0.1 → 10s
-
-
-
-
-
-
-
-
-
-
-
55°C
-
84.5mm
75mm
Phase Sequence Control, With PTC, Non-Neutral
CE
-
-20 to 55°C
-
44 x 84.5 x 75mm
44mm
-
460V
-
230V
-
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

AED 107.12

AED 107.12 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 107.12
Add to basket
RS Pro
-
-
-
Voltage
Three
-
-
-
380V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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

AED 343.74

AED 343.74 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 343.74
Add to basket
RS Pro
-
-
-
Voltage
1
-
-
SPDT
12 → 24V dc
-
Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
0 → 30s
-
-
-
-
-
-
-
L
-
-
-
+60°C
-
17.5mm
89mm
-
-
Screw
+60°C
1
17.5 x 66.5 x 89mm
66.5mm
-
24V dc
-
12V dc
-
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

AED 374.97

AED 374.97 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 374.97
Add to basket
RS Pro
-
-
-
Phase, Voltage
3
-
-
SPDT
-
-
Undervoltage
-
DIN Rail
-
-
-
-
-
-
Phase Failure, Phase Sequence
-
0.2 → 10s
48 → 63Hz
-
-
-
-
-
-
L
-
-
-
+60°C
-
17.5mm
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
-
Screw
+60°C
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

AED 541.14

AED 541.14 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 541.14
Add to basket
RS Pro
-
-
-
Phase
3
-
-
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+60°C
-
90mm
-
-
-
Screw
-20 → +60°C
-
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

AED 619.22

AED 619.22 Each (ex VAT)

Check stock

1

Available in multiples of 1
1AED 619.22
Add to basket
RS Pro
-
-
-
Phase
3
-
-
SPDT
Phase Loss, Voltage Assemmetry
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+60°C
-
90mm
-
-
-
Screw
-20 → +60°C
-
17.5 x 90 x 66.5mm
66.5mm
-
-
-
-
-

...