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

€ 30.21

€ 30.21 Each (ex VAT)

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1

Available in multiples of 1
1€ 30.21
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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

€ 27.75

€ 27.75 Each (ex VAT)

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1

Available in multiples of 1
1€ 27.75
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RS Pro
Liquid Level
Single
-
150 → 260V ac
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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

€ 13.71

€ 13.71 Each (ex VAT)

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1

Available in multiples of 1
1€ 13.71
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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.: 132-172Brand: RS PRO

€ 18.68

€ 18.68 Each (ex VAT)

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1

Available in multiples of 1
1€ 18.68
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RS Pro
Phase
Three
-
380V 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.: 132-173Brand: RS PRO

€ 23.38

€ 23.38 Each (ex VAT)

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1

Available in multiples of 1
1€ 23.38
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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.: 122-216Brand: RS PRO

€ 18.80

€ 18.80 Each (ex VAT)

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1

Available in multiples of 1
1€ 18.80
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

€ 21.45

€ 21.45 Each (ex VAT)

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1

Available in multiples of 1
1€ 21.45
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RS Pro
Voltage
Single
-
220V ac
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-
-
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.: 122-215Brand: RS PRO

€ 28.66

€ 28.66 Each (ex VAT)

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1

Available in multiples of 1
1€ 28.66
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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

€ 25.22

€ 25.22 Each (ex VAT)

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1

Available in multiples of 1
1€ 25.22
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RS Pro
Voltage
Three
-
380V ac
-
-
-
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

€ 145.73

€ 145.73 Each (ex VAT)

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1

Available in multiples of 1
1€ 145.73
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RS Pro
Phase
3
SPDT
Phase Loss, Voltage Assemmetry
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DIN Rail
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66.5mm
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+60°C
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Screw
90mm
17.5 x 90 x 66.5mm
-20°C
-20 → +60°C
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

€ 167.02

€ 167.02 Each (ex VAT)

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1

Available in multiples of 1
1€ 167.02
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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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66.21mm
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+60°C
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Screw
36mm
36 x 90 x 67mm
-10°C
-10 → +60°C
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

€ 178.82

€ 178.82 Each (ex VAT)

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1

Available in multiples of 1
1€ 178.82
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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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66.21mm
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90mm
+60°C
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Screw
36mm
36 x 90 x 67mm
-10°C
-10 → +60°C
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

€ 155.19

€ 155.19 Each (ex VAT)

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1

Available in multiples of 1
1€ 155.19
Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
-
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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45Hz
66.21mm
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65Hz
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+60°C
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Screw
36mm
36 x 90 x 67mm
-10°C
-10 → +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

€ 148.31

€ 148.31 Each (ex VAT)

Check stock

1

Available in multiples of 1
1€ 148.31
Add to basket
RS Pro
Phase
3
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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66.5mm
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+60°C
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Screw
90mm
17.5 x 90 x 66.5mm
-20°C
-20 → +60°C
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

€ 150.87

€ 150.87 Each (ex VAT)

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1

Available in multiples of 1
1€ 150.87
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RS Pro
Phase, Voltage
3
DPDT
243 → 540 V
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Undervoltage
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DIN Rail, Surface Mount
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Phase Failure, Phase Sequence
0.2 → 10s
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89mm
540V
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243 V
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66.5mm
+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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Screw
17.5mm
89 x 17.5 x 66.5mm
-20°C
-20 → +60°C
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

€ 76.48

€ 76.48 Each (ex VAT)

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1

Available in multiples of 1
1€ 76.48
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RS Pro
Phase
3
-
-
-
-
-
DIN Rail, Surface Mount
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-
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Phase Failure, Phase Sequence
-
-
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66.5mm
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+60°C
3 LEDs for Phase presence status, Sequence Status,
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Screw
17.5mm
-
-20°C
-20 → +60°C
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

€ 152.04

€ 152.04 Each (ex VAT)

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1

Available in multiples of 1
1€ 152.04
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RS Pro
Phase, Voltage
3
DPDT
-
-
Overvoltage, Undervoltage
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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
Add to parts list
RS Stock No.: 225-7386Brand: RS PRO

€ 136.82

€ 136.82 Each (ex VAT)

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1

Available in multiples of 1
1€ 136.82
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
Add to parts list
RS Stock No.: 102-6130Brand: RS PRO

€ 80.89

€ 80.89 Each (ex VAT)

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1

Available in multiples of 1
1€ 80.89
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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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L
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66.5mm
24V dc
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12V dc
1
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89mm
+60°C
-
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Screw
17.5mm
17.5 x 66.5 x 89mm
-20°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.: 102-6136Brand: RS PRO

€ 88.25

€ 88.25 Each (ex VAT)

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1

Available in multiples of 1
1€ 88.25
Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
-
Undervoltage
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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L
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66.5mm
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1
-
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89mm
+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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Screw
17.5mm
17.5 x 66.5 x 89mm
-20°C
+60°C

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