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, 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

€ 23.73

€ 23.73 Each (ex VAT)

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1

Available in multiples of 1
1€ 23.73
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RS Pro
Current
Single
-
150 → 260V ac
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-
DIN Rail
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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

€ 21.79

€ 21.79 Each (ex VAT)

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1

Available in multiples of 1
1€ 21.79
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RS Pro
Liquid Level
Single
-
150 → 260V ac
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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

€ 10.75

€ 10.75 Each (ex VAT)

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1

Available in multiples of 1
1€ 10.75
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RS Pro
Phase
Three
-
150 → 260V ac
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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.: 122-216Brand: RS PRO

€ 14.77

€ 14.77 Each (ex VAT)

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1

Available in multiples of 1
1€ 14.77
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RS Pro
Phase
Three
-
380V ac
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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.: 132-173Brand: RS PRO

€ 18.36

€ 18.36 Each (ex VAT)

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1

Available in multiples of 1
1€ 18.36
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RS Pro
Phase
Three
-
380V 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.: 132-172Brand: RS PRO

€ 14.66

€ 14.66 Each (ex VAT)

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1

Available in multiples of 1
1€ 14.66
Add to basket
RS Pro
Phase
Three
-
380V ac
-
-
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

€ 22.51

€ 22.51 Each (ex VAT)

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1

Available in multiples of 1
1€ 22.51
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RS Pro
Voltage
Single
-
220V ac
-
-
DIN Rail
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-
-
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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

€ 16.85

€ 16.85 Each (ex VAT)

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1

Available in multiples of 1
1€ 16.85
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RS Pro
Voltage
Single
-
220V ac
-
-
DIN Rail
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-
-
-
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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

€ 19.79

€ 19.79 Each (ex VAT)

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1

Available in multiples of 1
1€ 19.79
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RS Pro
Voltage
Three
-
380V ac
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-
DIN Rail
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-
-
-
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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
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RS Stock No.: 223-7795Brand: RS PRO

€ 114.42

€ 114.42 Each (ex VAT)

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1

Available in multiples of 1
1€ 114.42
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RS Pro
Phase
3
SPDT
Phase Loss, Voltage Assemmetry
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DIN Rail
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Screw
90mm
-20 → +60°C
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-20°C
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+60°C
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17.5 x 90 x 66.5mm
66.5mm
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RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
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RS Stock No.: 223-7789Brand: RS PRO

€ 131.13

€ 131.13 Each (ex VAT)

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1

Available in multiples of 1
1€ 131.13
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RS Pro
Voltage
3
DPDT
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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Screw
36mm
-10 → +60°C
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-10°C
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+60°C
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36 x 90 x 67mm
66.21mm
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RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
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RS Stock No.: 223-7790Brand: RS PRO

€ 140.39

€ 140.39 Each (ex VAT)

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1

Available in multiples of 1
1€ 140.39
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RS Pro
Voltage
3
DPDT
-
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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-
-
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2 → 999s
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Screw
36mm
-10 → +60°C
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-10°C
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+60°C
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36 x 90 x 67mm
66.21mm
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90mm
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RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
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RS Stock No.: 223-7788Brand: RS PRO

€ 121.86

€ 121.86 Each (ex VAT)

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1

Available in multiples of 1
1€ 121.86
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RS Pro
Phase, Voltage
3
SPDT
-
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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-
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Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
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Screw
36mm
-10 → +60°C
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-10°C
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+60°C
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36 x 90 x 67mm
66.21mm
45Hz
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65Hz
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RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
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RS Stock No.: 223-7791Brand: RS PRO

€ 116.46

€ 116.46 Each (ex VAT)

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1

Available in multiples of 1
1€ 116.46
Add to basket
RS Pro
Phase
3
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
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-
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Screw
90mm
-20 → +60°C
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-20°C
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+60°C
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17.5 x 90 x 66.5mm
66.5mm
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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
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RS Stock No.: 225-7388Brand: RS PRO

€ 118.46

€ 118.46 Each (ex VAT)

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1

Available in multiples of 1
1€ 118.46
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RS Pro
Phase, Voltage
3
DPDT
243 → 540 V
Undervoltage
-
DIN Rail, Surface Mount
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-
-
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-
Phase Failure, Phase Sequence
0.2 → 10s
-
-
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Screw
17.5mm
-20 → +60°C
Microprocessor Based, Detects Incorrect Phase Sequence, Phase Loss And Neutral Loss, Adjustment For Under Voltage Trip Level, Adjustment For Time Delay
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-20°C
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+60°C
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89 x 17.5 x 66.5mm
89mm
-
66.5mm
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540V
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243 V
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RS PRO Phase Monitoring Relay, 3 Phase, DIN Rail, Surface Mount
RS PRO Phase Monitoring Relay, 3 Phase, DIN Rail, Surface Mount
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RS Stock No.: 225-7384Brand: RS PRO

€ 60.04

€ 60.04 Each (ex VAT)

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1

Available in multiples of 1
1€ 60.04
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RS Pro
Phase
3
-
-
-
-
DIN Rail, Surface Mount
-
-
-
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-
Phase Failure, Phase Sequence
-
-
-
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Screw
17.5mm
-20 → +60°C
3 LEDs for Phase presence status, Sequence Status,
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-20°C
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+60°C
-
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66.5mm
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RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
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RS Stock No.: 225-7387Brand: RS PRO

€ 119.38

€ 119.38 Each (ex VAT)

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1

Available in multiples of 1
1€ 119.38
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RS Pro
Phase, Voltage
3
DPDT
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
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-
Phase Failure, Phase Sequence
-
-
-
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Screw
17.5mm
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RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
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RS Stock No.: 225-7386Brand: RS PRO

€ 107.44

€ 107.44 Each (ex VAT)

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1

Available in multiples of 1
1€ 107.44
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RS Pro
Voltage
3
DPDT
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
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Screw
17.5mm
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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

€ 63.52

€ 63.52 Each (ex VAT)

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1

Available in multiples of 1
1€ 63.52
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RS Pro
Voltage
1
SPDT
12 → 24V dc
Undervoltage
-
DIN Rail
-
-
-
-
-
-
0 → 30s
-
-
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L
Screw
17.5mm
+60°C
-
-
-20°C
1
+60°C
-
17.5 x 66.5 x 89mm
66.5mm
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89mm
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24V dc
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12V dc
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RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
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RS Stock No.: 102-6136Brand: RS PRO

€ 69.29

€ 69.29 Each (ex VAT)

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1

Available in multiples of 1
1€ 69.29
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RS Pro
Phase, Voltage
3
SPDT
-
Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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-
L
Screw
17.5mm
+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
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-20°C
1
+60°C
-
17.5 x 66.5 x 89mm
66.5mm
-
89mm
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