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 1230 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 2,113.05

EGP 2,113.05 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 2,113.05
Add to basket
RS Pro
-
-
Current
-
-
-
Single
-
150 → 260V ac
-
-
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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 1,941.19

EGP 1,941.19 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,941.19
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 1,049.50

EGP 1,049.50 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,049.50
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 1,413.33

EGP 1,413.33 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,413.33
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 1,402.68

EGP 1,402.68 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,402.68
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 1,771.84

EGP 1,771.84 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,771.84
Add to basket
RS Pro
-
-
Phase
-
-
-
Three
-
380V 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

EGP 1,614.62

EGP 1,614.62 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,614.62
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 2,118.82

EGP 2,118.82 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 2,118.82
Add to basket
RS Pro
-
-
Voltage
-
-
-
Single
-
220V ac
-
-
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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 1,896.23

EGP 1,896.23 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 1,896.23
Add to basket
RS Pro
-
-
Voltage
-
-
-
Three
-
380V ac
-
-
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
RS PRO Voltage Monitoring Relay With SPDT Contacts, Undervoltage
RS PRO Voltage Monitoring Relay With SPDT Contacts, Undervoltage
Add to parts list
RS Stock No.: 102-6130Brand: RS PRO

EGP 5,746.36

EGP 5,746.36 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 5,746.36
Add to basket
RS Pro
-
-
Voltage
-
-
-
1
-
12 → 24V dc
-
SPDT
-
Undervoltage
-
-
DIN Rail
-
-
-
-
-
0 → 30s
-
-
-
L
-
-
66.5mm
1
-
-
-
24V dc
12V dc
89mm
-20°C
17.5mm
-
-
-
17.5 x 66.5 x 89mm
Screw
+60°C
-
+60°C
RS PRO Phase, Voltage Monitoring Relay With SPDT Contacts, Undervoltage
RS PRO Phase, Voltage Monitoring Relay With SPDT Contacts, Undervoltage
Add to parts list
RS Stock No.: 102-6136Brand: RS PRO

EGP 6,266.23

EGP 6,266.23 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 6,266.23
Add to basket
RS Pro
-
-
Phase, Voltage
-
-
-
3
-
-
-
SPDT
-
Undervoltage
-
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
-
66.5mm
1
-
-
-
-
-
89mm
-20°C
17.5mm
-
-
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
17.5 x 66.5 x 89mm
Screw
+60°C
-
+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 10,309.22

EGP 10,309.22 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 10,309.22
Add to basket
RS Pro
-
-
Phase
-
-
-
3
-
Phase Loss, Voltage Assemmetry
-
SPDT
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
66.5mm
-
-
-
-
-
-
-
-20°C
90mm
-
-
-
17.5 x 90 x 66.5mm
Screw
-20 → +60°C
-
+60°C
RS PRO Phase, Voltage Monitoring Relay With SPDT Contacts, Undervoltage
RS PRO Phase, Voltage Monitoring Relay With SPDT Contacts, Undervoltage
Add to parts list
RS Stock No.: 102-6135Brand: RS PRO

EGP 5,991.43

EGP 5,991.43 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 5,991.43
Add to basket
RS Pro
-
-
Phase, Voltage
-
-
-
3
-
Maximum of 280 V
-
SPDT
-
Undervoltage
-
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
-
-
66.5mm
1
-
-
-
280V
-
89mm
-20°C
17.5mm
-
-
2 LEDs for the Indication of Operational States, Detects Incorrect Phase Sequence & Phase Loss, Fixed Time Delay, Fixed Undervoltage Trip Level, Measures Phase to Phase Voltages, Microprocessor Based Relay, Monitors Own Supply & Detects an Undervoltage Condition on One or more Phases, True RMS Monitoring
17.5 x 66.5 x 89mm
Screw
+60°C
-
+60°C
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
Add to parts list
RS Stock No.: 223-7789Brand: RS PRO

EGP 11,860.84

EGP 11,860.84 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 11,860.84
Add to basket
RS Pro
-
-
Voltage
-
-
-
3
-
-
-
DPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
-
-
66.21mm
-
-
-
-
-
-
-
-10°C
36mm
-
-
-
36 x 90 x 67mm
Screw
-10 → +60°C
-
+60°C
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
Add to parts list
RS Stock No.: 223-7790Brand: RS PRO

EGP 12,704.61

EGP 12,704.61 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 12,704.61
Add to basket
RS Pro
-
-
Voltage
-
-
-
3
-
-
-
DPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
-
-
66.21mm
-
-
-
-
-
-
90mm
-10°C
36mm
-
-
-
36 x 90 x 67mm
Screw
-10 → +60°C
-
+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.: 223-7788Brand: RS PRO

EGP 11,025.35

EGP 11,025.35 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 11,025.35
Add to basket
RS Pro
-
-
Phase, Voltage
-
-
-
3
-
-
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
-
-
-
-
-
-
66.21mm
-
-
65Hz
-
-
-
-
-10°C
36mm
-
-
-
36 x 90 x 67mm
Screw
-10 → +60°C
45Hz
+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.: 223-7791Brand: RS PRO

EGP 10,495.72

EGP 10,495.72 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 10,495.72
Add to basket
RS Pro
-
-
Phase
-
-
-
3
-
-
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
66.5mm
-
-
-
-
-
-
-
-20°C
90mm
-
-
-
17.5 x 90 x 66.5mm
Screw
-20 → +60°C
-
+60°C
RS PRO Voltage Monitoring Relay With SPDT Contacts, Overvoltage, Undervoltage
RS PRO Voltage Monitoring Relay With SPDT Contacts, Overvoltage, Undervoltage
Add to parts list
RS Stock No.: 102-6133Brand: RS PRO

EGP 10,963.53

EGP 10,963.53 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 10,963.53
Add to basket
RS Pro
-
-
Voltage
-
-
-
1
-
Maximum of 500 V
-
SPDT
-
Overvoltage, Undervoltage
-
-
DIN Rail
-
-
-
-
-
0.1 → 30s
48 → 63Hz
-
-
L
-
-
66.5mm
1
-
-
-
500V
-
89mm
-20°C
17.5mm
-
-
-
17.5 x 66.5 x 89mm
Screw
+60°C
-
+60°C
RS PRO Current Monitoring Relay With SPDT Contacts
RS PRO Current Monitoring Relay With SPDT Contacts
Add to parts list
RS Stock No.: 102-6134Brand: RS PRO

EGP 10,963.53

EGP 10,963.53 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 10,963.53
Add to basket
RS Pro
-
-
Current
-
-
-
1
-
-
-
SPDT
-
-
-
-
DIN Rail
1A
-
10A
Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
-
-
L
-
1 → 10A
66.5mm
1
-
-
-
-
-
89mm
-20°C
17.5mm
-
-
Green LED Indication for Supply Status
66.5 x 17.5 x 89mm
Screw
+60°C
-
+60°C
RS PRO Phase, Voltage Monitoring Relay With SPDT Contacts, Overvoltage, Undervoltage
RS PRO Phase, Voltage Monitoring Relay With SPDT Contacts, Overvoltage, Undervoltage
Add to parts list
RS Stock No.: 102-6137Brand: RS PRO

EGP 8,071.35

EGP 8,071.35 Each (ex VAT)

Check stock

1

Available in multiples of 1
1EGP 8,071.35
Add to basket
RS Pro
-
-
Phase, Voltage
-
-
-
3
-
-
-
SPDT
-
Overvoltage, Undervoltage
-
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
-
66.5mm
1
-
-
-
-
-
89mm
-20°C
17.5mm
-
-
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
17.5 x 66.5 x 89mm
Screw
+60°C
-
+60°C

...