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

€ 23.86

€ 23.86 Each (ex VAT)

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1

Available in multiples of 1
1€ 23.86
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RS Pro
Current
Single
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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

€ 21.92

€ 21.92 Each (ex VAT)

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1

Available in multiples of 1
1€ 21.92
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RS Pro
Liquid Level
Single
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150 → 260V ac
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-
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DIN Rail
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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

€ 10.81

€ 10.81 Each (ex VAT)

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1

Available in multiples of 1
1€ 10.81
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RS Pro
Phase
Three
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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

€ 14.84

€ 14.84 Each (ex VAT)

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1

Available in multiples of 1
1€ 14.84
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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.: 132-172Brand: RS PRO

€ 14.74

€ 14.74 Each (ex VAT)

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1

Available in multiples of 1
1€ 14.74
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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

€ 18.46

€ 18.46 Each (ex VAT)

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1

Available in multiples of 1
1€ 18.46
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.: 122-210Brand: RS PRO

€ 16.94

€ 16.94 Each (ex VAT)

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1

Available in multiples of 1
1€ 16.94
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RS Pro
Voltage
Single
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220V ac
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-
-
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

€ 22.63

€ 22.63 Each (ex VAT)

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1

Available in multiples of 1
1€ 22.63
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RS Pro
Voltage
Single
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220V ac
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-
-
DIN Rail
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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

€ 19.90

€ 19.90 Each (ex VAT)

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1

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

€ 115.03

€ 115.03 Each (ex VAT)

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1

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

€ 131.83

€ 131.83 Each (ex VAT)

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1

Available in multiples of 1
1€ 131.83
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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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+60°C
-10°C
36mm
-10 → +60°C
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66.21mm
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36 x 90 x 67mm
Screw
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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

€ 141.14

€ 141.14 Each (ex VAT)

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1

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

€ 122.50

€ 122.50 Each (ex VAT)

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1

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

Check stock

1

Available in multiples of 1
1€ 117.08
Add to basket
RS Pro
Phase
3
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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+60°C
-20°C
90mm
-20 → +60°C
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66.5mm
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17.5 x 90 x 66.5mm
Screw
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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

€ 119.09

€ 119.09 Each (ex VAT)

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1

Available in multiples of 1
1€ 119.09
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RS Pro
Phase, Voltage
3
DPDT
243 → 540 V
-
Undervoltage
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DIN Rail, Surface Mount
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Phase Failure, Phase Sequence
0.2 → 10s
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+60°C
-20°C
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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540V
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243 V
89mm
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89 x 17.5 x 66.5mm
Screw
66.5mm
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

€ 60.36

€ 60.36 Each (ex VAT)

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1

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

€ 120.01

€ 120.01 Each (ex VAT)

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1

Available in multiples of 1
1€ 120.01
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RS Pro
Phase, Voltage
3
DPDT
-
-
Overvoltage, Undervoltage
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DIN Rail
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-
-
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Phase Failure, Phase Sequence
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17.5mm
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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 (ex VAT)

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1

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

€ 63.85

€ 63.85 Each (ex VAT)

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1

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

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1

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

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