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

EGP 2,370.00

EGP 2,370.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 2,370.00
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

EGP 4,806.00

EGP 4,806.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 4,806.00
Add to basket
RS Pro
Current
-
-
-
-
Three
-
1NO/1NC
-
-
-
-
-
-
DIN Rail Mount
40A
100A
-
-
-
-
0.1 → 20s
-
-
-
-
-
-
-
-
-
-
-
55°C
-
75mm
84.5mm
-20°C
44 x 84.5 x 75mm
CE
-
Error Delay Time Adjustable
-20 to 55°C
-
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

EGP 2,188.00

EGP 2,188.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 2,188.00
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

EGP 1,049.00

EGP 1,049.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,049.00
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

EGP 1,412.00

EGP 1,412.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,412.00
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

EGP 1,405.00

EGP 1,405.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,405.00
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

EGP 1,772.00

EGP 1,772.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,772.00
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

EGP 3,908.00

EGP 3,908.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 3,908.00
Add to basket
RS Pro
Voltage
-
-
-
-
1
-
CO
150 → 300V ac
Overvoltage, Undervoltage
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-
-
-
-
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

EGP 3,905.00

EGP 3,905.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 3,905.00
Add to basket
RS Pro
Voltage
-
-
-
-
1
-
CO
150 → 300V ac
Overvoltage, Undervoltage
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-
-
-
-
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

EGP 3,211.00

EGP 3,211.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 3,211.00
Add to basket
RS Pro
Voltage
-
-
-
-
3
-
CO
-
Voltage Asymmetry
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-
-
-
-
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

EGP 2,889.00

EGP 2,889.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 2,889.00
Add to basket
RS Pro
Voltage
-
-
-
-
3
-
CO
-
Voltage Asymmetry
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-
-
-
-
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

EGP 4,142.00

EGP 4,142.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 4,142.00
Add to basket
RS Pro
Voltage
-
-
-
-
Single
-
1NO
120 → 300V ac
Overvoltage
-
-
-
-
DIN Rail Mount
-
-
-
-
-
-
0.1 → 600s
-
-
-
-
-
-
-
-
-
-
-
55°C
-
90.3mm
67.5mm
-20°C
52.9 x 67.5 x 90.3mm
CE
-
Built-In Current Transformer, Built-In Contactor
-20 to 55°C
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.: 122-210Brand: RS PRO

EGP 1,615.00

EGP 1,615.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,615.00
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.: 122-215Brand: RS PRO

EGP 2,119.00

EGP 2,119.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 2,119.00
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

EGP 3,334.00

EGP 3,334.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 3,334.00
Add to basket
RS Pro
Voltage
-
-
-
-
Three
-
1NO/1NC
230 → 460V ac
Overvoltage
-
-
-
-
DIN Rail or Panel
-
-
-
-
Phase Loss
-
0.1 → 10s
-
-
-
-
-
-
-
-
-
-
-
55°C
-
75mm
84.5mm
-20°C
44 x 84.5 x 75mm
CE
-
Phase Sequence Control, With PTC, Non-Neutral
-20 to 55°C
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

EGP 1,897.00

EGP 1,897.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,897.00
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

EGP 5,747.00

EGP 5,747.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 5,747.00
Add to basket
RS Pro
Voltage
-
-
-
-
1
-
SPDT
12 → 24V dc
Undervoltage
-
-
-
-
DIN Rail
-
-
-
-
-
-
0 → 30s
-
-
-
-
-
-
-
L
-
-
-
+60°C
Screw
89mm
17.5mm
-20°C
17.5 x 66.5 x 89mm
-
1
-
+60°C
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

EGP 6,267.00

EGP 6,267.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 6,267.00
Add to basket
RS Pro
Phase, Voltage
-
-
-
-
3
-
SPDT
-
Undervoltage
-
-
-
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
-
0.2 → 10s
-
-
48 → 63Hz
-
-
-
-
L
-
-
-
+60°C
Screw
89mm
17.5mm
-20°C
17.5 x 66.5 x 89mm
-
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
+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

EGP 9,029.00

EGP 9,029.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 9,029.00
Add to basket
RS Pro
Phase
-
-
-
-
3
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+60°C
Screw
-
90mm
-20°C
17.5 x 90 x 66.5mm
-
-
-
-20 → +60°C
-
-
-
-
-
-
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

EGP 10,310.00

EGP 10,310.00 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 10,310.00
Add to basket
RS Pro
Phase
-
-
-
-
3
-
SPDT
Phase Loss, Voltage Assemmetry
-
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+60°C
Screw
-
90mm
-20°C
17.5 x 90 x 66.5mm
-
-
-
-20 → +60°C
-
-
-
-
-
-

...