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

€ 33.38

€ 33.38 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 33.38
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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

€ 30.75

€ 30.75 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 30.75
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RS Pro
Liquid Level
Single
-
150 → 260V ac
-
-
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

€ 15.19

€ 15.19 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 15.19
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RS Pro
Phase
Three
-
150 → 260V ac
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-
DIN Rail
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-
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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

€ 20.83

€ 20.83 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 20.83
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RS Pro
Phase
Three
-
380V ac
-
-
DIN Rail
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-
-
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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

€ 25.85

€ 25.85 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 25.85
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RS Pro
Phase
Three
-
380V ac
-
-
DIN Rail
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-
-
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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

€ 20.71

€ 20.71 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 20.71
Add to basket
RS Pro
Phase
Three
-
380V ac
-
-
DIN Rail
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-
-
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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.: 122-215Brand: RS PRO

€ 31.75

€ 31.75 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 31.75
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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

€ 23.72

€ 23.72 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 23.72
Add to basket
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

€ 27.86

€ 27.86 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 27.86
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RS Pro
Voltage
Three
-
380V ac
-
-
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

€ 160.64

€ 160.64 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 160.64
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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

€ 184.48

€ 184.48 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 184.48
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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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-
-
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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

€ 198.29

€ 198.29 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 198.29
Add to basket
RS Pro
Voltage
3
DPDT
-
Overvoltage Protection, Undervoltage Protection
-
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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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

€ 171.94

€ 171.94 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 171.94
Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
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Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
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-
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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

€ 164.40

€ 164.40 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 164.40
Add to basket
RS Pro
Phase
3
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
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 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

€ 166.92

€ 166.92 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 166.92
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RS Pro
Phase, Voltage
3
DPDT
243 → 540 V
Undervoltage
-
DIN Rail, Surface Mount
-
-
-
-
-
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
-
89 x 17.5 x 66.5mm
89mm
-
66.5mm
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540V
-
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

€ 84.71

€ 84.71 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 84.71
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RS Pro
Phase
3
-
-
-
-
DIN Rail, Surface Mount
-
-
-
-
-
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
-
+60°C
-
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66.5mm
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-
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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

€ 168.17

€ 168.17 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 168.17
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RS Pro
Phase, Voltage
3
DPDT
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
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-
Screw
17.5mm
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-
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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

€ 151.86

€ 151.86 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 151.86
Add to basket
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

€ 89.73

€ 89.73 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 89.73
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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
-
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
Add to parts list
RS Stock No.: 102-6136Brand: RS PRO

€ 97.89

€ 97.89 Each (Exc. Vat)

Check stock

1

Available in multiples of 1
1€ 97.89
Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
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
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89mm
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-
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