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 1190 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

€ 23.86

€ 23.86 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 23.86
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

€ 21.92

€ 21.92 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 21.92
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

€ 10.81

€ 10.81 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 10.81
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

€ 14.84

€ 14.84 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 14.84
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

€ 14.74

€ 14.74 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 14.74
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

€ 18.46

€ 18.46 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 18.46
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

€ 16.94

€ 16.94 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 16.94
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

€ 22.63

€ 22.63 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 22.63
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

€ 19.90

€ 19.90 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 19.90
Add to basket
RS Pro
Voltage
Three
-
380V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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

€ 115.03

€ 115.03 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 115.03
Add to basket
RS Pro
Phase
3
SPDT
Phase Loss, Voltage Assemmetry
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
90mm
-
-
66.5mm
Screw
-
-20°C
+60°C
-
-
-
-
-
-20 → +60°C
-
-
17.5 x 90 x 66.5mm
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

€ 131.83

€ 131.83 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 131.83
Add to basket
RS Pro
Voltage
3
DPDT
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
-
-
36mm
-
-
66.21mm
Screw
-
-10°C
+60°C
-
-
-
-
-
-10 → +60°C
-
-
36 x 90 x 67mm
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

€ 141.14

€ 141.14 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 141.14
Add to basket
RS Pro
Voltage
3
DPDT
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
-
-
36mm
-
90mm
66.21mm
Screw
-
-10°C
+60°C
-
-
-
-
-
-10 → +60°C
-
-
36 x 90 x 67mm
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

€ 122.50

€ 122.50 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 122.50
Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
-
-
-
-
-
-
36mm
-
-
66.21mm
Screw
45Hz
-10°C
+60°C
-
65Hz
-
-
-
-10 → +60°C
-
-
36 x 90 x 67mm
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

€ 117.08

€ 117.08 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 117.08
Add to basket
RS Pro
Phase
3
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
90mm
-
-
66.5mm
Screw
-
-20°C
+60°C
-
-
-
-
-
-20 → +60°C
-
-
17.5 x 90 x 66.5mm
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 243 → 540 V, DIN Rail, Surface Mount
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 243 → 540 V, DIN Rail, Surface Mount
Add to parts list
RS Stock No.: 225-7388Brand: RS PRO

€ 119.09

€ 119.09 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 119.09
Add to basket
RS Pro
Phase, Voltage
3
DPDT
243 → 540 V
-
Undervoltage
-
DIN Rail, Surface Mount
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
-
-
-
-
-
-
17.5mm
-
66.5mm
89mm
Screw
-
-20°C
+60°C
540V
-
-
243 V
-
-20 → +60°C
Microprocessor Based, Detects Incorrect Phase Sequence, Phase Loss And Neutral Loss, Adjustment For Under Voltage Trip Level, Adjustment For Time Delay
-
89 x 17.5 x 66.5mm
RS PRO Phase Monitoring Relay, 3 Phase, DIN Rail, Surface Mount
RS PRO Phase Monitoring Relay, 3 Phase, DIN Rail, Surface Mount
Add to parts list
RS Stock No.: 225-7384Brand: RS PRO

€ 60.36

€ 60.36 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 60.36
Add to basket
RS Pro
Phase
3
-
-
-
-
-
DIN Rail, Surface Mount
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
-
-
17.5mm
-
-
66.5mm
Screw
-
-20°C
+60°C
-
-
-
-
-
-20 → +60°C
3 LEDs for Phase presence status, Sequence Status,
-
-
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
Add to parts list
RS Stock No.: 225-7387Brand: RS PRO

€ 120.01

€ 120.01 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 120.01
Add to basket
RS Pro
Phase, Voltage
3
DPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
-
-
17.5mm
-
-
-
Screw
-
-
-
-
-
-
-
-
-
-
-
-
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.: 225-7386Brand: RS PRO

€ 108.01

€ 108.01 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 108.01
Add to basket
RS Pro
Voltage
3
DPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
17.5mm
-
-
-
Screw
-
-
-
-
-
-
-
-
-
-
-
-
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

€ 63.85

€ 63.85 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 63.85
Add to basket
RS Pro
Voltage
1
SPDT
12 → 24V dc
-
Undervoltage
-
DIN Rail
-
-
-
-
-
0 → 30s
-
-
-
L
-
-
17.5mm
1
89mm
66.5mm
Screw
-
-20°C
+60°C
24V dc
-
-
12V dc
-
+60°C
-
-
17.5 x 66.5 x 89mm
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

€ 69.66

€ 69.66 Each (Exc. VAT)

Check stock

1

Available in multiples of 1
1€ 69.66
Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
-
Undervoltage
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
-
17.5mm
1
89mm
66.5mm
Screw
-
-20°C
+60°C
-
-
-
-
-
+60°C
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

...