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 PROHSN Code: 85364900

SR 179.24

SR 179.24 Each (ex VAT)

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1

Available in multiples of 1
1SR 179.24
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RS Pro
Current
Single
-
150 → 260V ac
-
-
-
DIN Rail
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-
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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 PROHSN Code: 85364900

SR 164.98

SR 164.98 Each (ex VAT)

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1

Available in multiples of 1
1SR 164.98
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RS Pro
Liquid Level
Single
-
150 → 260V ac
-
-
-
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 PROHSN Code: 85364900

SR 80.49

SR 80.49 Each (ex VAT)

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1

Available in multiples of 1
1SR 80.49
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RS Pro
Phase
Three
-
150 → 260V 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 PROHSN Code: 85364900

SR 108.87

SR 108.87 Each (ex VAT)

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1

Available in multiples of 1
1SR 108.87
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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 PROHSN Code: 85364900

SR 136.79

SR 136.79 Each (ex VAT)

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1

Available in multiples of 1
1SR 136.79
Add to basket
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 PROHSN Code: 85364900

SR 109.66

SR 109.66 Each (ex VAT)

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1

Available in multiples of 1
1SR 109.66
Add to basket
RS Pro
Phase
Three
-
380V 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.: 122-215Brand: RS PROHSN Code: 85364900

SR 166.08

SR 166.08 Each (ex VAT)

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1

Available in multiples of 1
1SR 166.08
Add to basket
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
Add to parts list
RS Stock No.: 122-210Brand: RS PROHSN Code: 85364900

SR 125.18

SR 125.18 Each (ex VAT)

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1

Available in multiples of 1
1SR 125.18
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 PROHSN Code: 85364900

SR 147.08

SR 147.08 Each (ex VAT)

Check stock

1

Available in multiples of 1
1SR 147.08
Add to basket
RS Pro
Voltage
Three
-
380V ac
-
-
-
DIN Rail
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-
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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 PROHSN Code: 85364900

SR 461.56

SR 461.56 Each (ex VAT)

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1

Available in multiples of 1
1SR 461.56
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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
-
+60°C
-
89mm
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12V dc
24V dc
-
-
-
17.5mm
Screw
-20°C
1
17.5 x 66.5 x 89mm
+60°C
66.5mm
-
-
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 PROHSN Code: 85364900

SR 503.47

SR 503.47 Each (ex VAT)

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1

Available in multiples of 1
1SR 503.47
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RS Pro
Phase, Voltage
3
SPDT
-
Undervoltage
-
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
+60°C
-
89mm
-
-
-
-
-
-
17.5mm
Screw
-20°C
1
17.5 x 66.5 x 89mm
+60°C
66.5mm
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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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 PROHSN Code: 85364900

SR 830.22

SR 830.22 Each (ex VAT)

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1

Available in multiples of 1
1SR 830.22
Add to basket
RS Pro
Phase
3
SPDT
Phase Loss, Voltage Assemmetry
-
-
-
DIN Rail
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-
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+60°C
-
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90mm
Screw
-20°C
-
17.5 x 90 x 66.5mm
-20 → +60°C
66.5mm
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-
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, Maximum of 280 V, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, Maximum of 280 V, DIN Rail
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RS Stock No.: 102-6135Brand: RS PROHSN Code: 85364900

SR 481.04

SR 481.04 Each (ex VAT)

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1

Available in multiples of 1
1SR 481.04
Add to basket
RS Pro
Phase, Voltage
3
SPDT
Maximum of 280 V
Undervoltage
-
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
-
+60°C
-
89mm
-
-
280V
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-
-
17.5mm
Screw
-20°C
1
17.5 x 66.5 x 89mm
+60°C
66.5mm
2 LEDs for the Indication of Operational States, Detects Incorrect Phase Sequence & Phase Loss, Fixed Time Delay, Fixed Undervoltage Trip Level, 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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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 PROHSN Code: 85364900

SR 952.86

SR 952.86 Each (ex VAT)

Check stock

1

Available in multiples of 1
1SR 952.86
Add to basket
RS Pro
Voltage
3
DPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
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-
-
-
-
2 → 999s
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-
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+60°C
-
-
-
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-
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36mm
Screw
-10°C
-
36 x 90 x 67mm
-10 → +60°C
66.21mm
-
-
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 PROHSN Code: 85364900

SR 1,020.36

SR 1,020.36 Each (ex VAT)

Check stock

1

Available in multiples of 1
1SR 1,020.36
Add to basket
RS Pro
Voltage
3
DPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
-
+60°C
-
90mm
-
-
-
-
-
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36mm
Screw
-10°C
-
36 x 90 x 67mm
-10 → +60°C
66.21mm
-
-
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 PROHSN Code: 85364900

SR 885.55

SR 885.55 Each (ex VAT)

Check stock

1

Available in multiples of 1
1SR 885.55
Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
-
-
-
-
-
+60°C
-
-
-
-
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65Hz
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-
36mm
Screw
-10°C
-
36 x 90 x 67mm
-10 → +60°C
66.21mm
-
45Hz
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 PROHSN Code: 85364900

SR 845.08

SR 845.08 Each (ex VAT)

Check stock

1

Available in multiples of 1
1SR 845.08
Add to basket
RS Pro
Phase
3
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
-
-
-
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+60°C
-
-
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90mm
Screw
-20°C
-
17.5 x 90 x 66.5mm
-20 → +60°C
66.5mm
-
-
RS PRO Voltage Monitoring Relay, 1 Phase, SPDT, Maximum of 500 V, DIN Rail
RS PRO Voltage Monitoring Relay, 1 Phase, SPDT, Maximum of 500 V, DIN Rail
Add to parts list
RS Stock No.: 102-6133Brand: RS PROHSN Code: 85364900

SR 884.25

SR 884.25 Each (ex VAT)

Check stock

1

Available in multiples of 1
1SR 884.25
Add to basket
RS Pro
Voltage
1
SPDT
Maximum of 500 V
Overvoltage, Undervoltage
-
-
DIN Rail
-
-
-
-
-
0.1 → 30s
48 → 63Hz
-
-
L
-
+60°C
-
89mm
-
-
500V
-
-
-
17.5mm
Screw
-20°C
1
17.5 x 66.5 x 89mm
+60°C
66.5mm
-
-
RS PRO Current Monitoring Relay, 1 Phase, SPDT, DIN Rail
RS PRO Current Monitoring Relay, 1 Phase, SPDT, DIN Rail
Add to parts list
RS Stock No.: 102-6134Brand: RS PROHSN Code: 85364900

SR 884.25

SR 884.25 Each (ex VAT)

Check stock

1

Available in multiples of 1
1SR 884.25
Add to basket
RS Pro
Current
1
SPDT
-
-
-
-
DIN Rail
1A
-
10A
Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
-
-
L
-
+60°C
-
89mm
-
-
-
-
-
1 → 10A
17.5mm
Screw
-20°C
1
66.5 x 17.5 x 89mm
+60°C
66.5mm
Green LED Indication for Supply Status
-
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.: 102-6137Brand: RS PROHSN Code: 85364900

SR 649.76

SR 649.76 Each (ex VAT)

Check stock

1

Available in multiples of 1
1SR 649.76
Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
Overvoltage, Undervoltage
-
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
+60°C
-
89mm
-
-
-
-
-
-
17.5mm
Screw
-20°C
1
17.5 x 66.5 x 89mm
+60°C
66.5mm
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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