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 172.50

SR 172.50 Each (ex VAT)

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1

Available in multiples of 1
1SR 172.50
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RS Pro
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Current
Single
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150 → 260V ac
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DIN Rail
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RS PRO Current Monitoring Relay, Three Phase, 1NO/1NC, DIN Rail Mount
RS PRO Current Monitoring Relay, Three Phase, 1NO/1NC, DIN Rail Mount
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RS Stock No.: 434-506Brand: RS PROHSN Code: 85364900

SR 362.25

SR 362.25 Each (ex VAT)

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1

Available in multiples of 1
1SR 362.25
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RS Pro
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Current
Three
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1NO/1NC
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DIN Rail Mount
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40A
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100A
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0.1 → 20s
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55°C
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84.5mm
75mm
Error Delay Time Adjustable
CE
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-20 to 55°C
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44 x 84.5 x 75mm
44mm
40 → 100A
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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 166.75

SR 166.75 Each (ex VAT)

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1

Available in multiples of 1
1SR 166.75
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RS Pro
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Liquid Level
Single
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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 PROHSN Code: 85364900

SR 81.65

SR 81.65 Each (ex VAT)

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1

Available in multiples of 1
1SR 81.65
Add to basket
RS Pro
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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 PROHSN Code: 85364900

SR 110.40

SR 110.40 Each (ex VAT)

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1

Available in multiples of 1
1SR 110.40
Add to basket
RS Pro
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Phase
Three
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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
Add to parts list
RS Stock No.: 132-172Brand: RS PROHSN Code: 85364900

SR 110.40

SR 110.40 Each (ex VAT)

Check stock

1

Available in multiples of 1
1SR 110.40
Add to basket
RS Pro
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Phase
Three
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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
Add to parts list
RS Stock No.: 132-173Brand: RS PROHSN Code: 85364900

SR 138.00

SR 138.00 Each (ex VAT)

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1

Available in multiples of 1
1SR 138.00
Add to basket
RS Pro
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Phase
Three
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380V ac
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DIN Rail
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RS PRO Phase, Voltage Monitoring Relay, Single Phase, CO, 270 → 370, 410 → 510V ac, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, Single Phase, CO, 270 → 370, 410 → 510V ac, DIN Rail
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RS Stock No.: 558-898Brand: RS PROHSN Code: 85364900

SR 311.65

SR 311.65 Each (ex VAT)

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1

Available in multiples of 1
1SR 311.65
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RS Pro
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Voltage
1
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CO
150 → 300V ac
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Overvoltage, Undervoltage
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DIN Rail
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
Screw
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RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, 150 → 210, 240 → 300V ac, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, 150 → 210, 240 → 300V ac, DIN Rail
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RS Stock No.: 558-901Brand: RS PROHSN Code: 85364900

SR 310.50

SR 310.50 Each (ex VAT)

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1

Available in multiples of 1
1SR 310.50
Add to basket
RS Pro
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Voltage
1
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CO
150 → 300V ac
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Overvoltage, Undervoltage
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DIN Rail
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
Screw
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RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
Add to parts list
RS Stock No.: 558-892Brand: RS PROHSN Code: 85364900

SR 261.05

SR 261.05 Each (ex VAT)

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1

Available in multiples of 1
1SR 261.05
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RS Pro
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Voltage
3
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CO
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Voltage Asymmetry
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DIN Rail
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
Screw
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RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, Three Phase, CO, DIN Rail
Add to parts list
RS Stock No.: 558-897Brand: RS PROHSN Code: 85364900

SR 227.70

SR 227.70 Each (ex VAT)

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1

Available in multiples of 1
1SR 227.70
Add to basket
RS Pro
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Voltage
3
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CO
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Voltage Asymmetry
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DIN Rail
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
Screw
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RS PRO Voltage Monitoring Relay, Single Phase, 1NO, 120 → 300V ac, DIN Rail Mount
RS PRO Voltage Monitoring Relay, Single Phase, 1NO, 120 → 300V ac, DIN Rail Mount
Add to parts list
RS Stock No.: 434-521Brand: RS PROHSN Code: 85364900

SR 322.00

SR 322.00 Each (ex VAT)

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1

Available in multiples of 1
1SR 322.00
Add to basket
RS Pro
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Voltage
Single
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1NO
120 → 300V ac
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Overvoltage
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DIN Rail Mount
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0.1 → 600s
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55°C
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67.5mm
90.3mm
Built-In Current Transformer, Built-In Contactor
CE
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-20 to 55°C
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52.9 x 67.5 x 90.3mm
52.9mm
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300V
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120V
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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.: 122-215Brand: RS PROHSN Code: 85364900

SR 166.75

SR 166.75 Each (ex VAT)

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1

Available in multiples of 1
1SR 166.75
Add to basket
RS Pro
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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
Add to parts list
RS Stock No.: 122-210Brand: RS PROHSN Code: 85364900

SR 126.50

SR 126.50 Each (ex VAT)

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1

Available in multiples of 1
1SR 126.50
Add to basket
RS Pro
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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, 1NO/1NC, 230 → 460V ac, DIN Rail or Panel
RS PRO Voltage Monitoring Relay, Three Phase, 1NO/1NC, 230 → 460V ac, DIN Rail or Panel
Add to parts list
RS Stock No.: 434-520Brand: RS PROHSN Code: 85364900

SR 257.60

SR 257.60 Each (ex VAT)

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1

Available in multiples of 1
1SR 257.60
Add to basket
RS Pro
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Voltage
Three
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1NO/1NC
230 → 460V ac
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Overvoltage
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DIN Rail or Panel
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Phase Loss
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0.1 → 10s
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55°C
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84.5mm
75mm
Phase Sequence Control, With PTC, Non-Neutral
CE
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-20 to 55°C
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44 x 84.5 x 75mm
44mm
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460V
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230V
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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
Add to parts list
RS Stock No.: 122-212Brand: RS PROHSN Code: 85364900

SR 148.35

SR 148.35 Each (ex VAT)

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1

Available in multiples of 1
1SR 148.35
Add to basket
RS Pro
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Voltage
Three
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380V ac
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DIN Rail
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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 PROHSN Code: 85364900

SR 462.30

SR 462.30 Each (ex VAT)

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1

Available in multiples of 1
1SR 462.30
Add to basket
RS Pro
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Voltage
1
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SPDT
12 → 24V dc
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Undervoltage
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DIN Rail
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0 → 30s
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L
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+60°C
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17.5mm
89mm
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Screw
+60°C
1
17.5 x 66.5 x 89mm
66.5mm
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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 PROHSN Code: 85364900

SR 504.85

SR 504.85 Each (ex VAT)

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1

Available in multiples of 1
1SR 504.85
Add to basket
RS Pro
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Phase, Voltage
3
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SPDT
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Undervoltage
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DIN Rail
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Phase Failure, Phase Sequence
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0.2 → 10s
48 → 63Hz
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L
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+60°C
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17.5mm
89mm
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
+60°C
1
17.5 x 66.5 x 89mm
66.5mm
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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.: 223-7792Brand: RS PROHSN Code: 85364900

SR 726.80

SR 726.80 Each (ex VAT)

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1

Available in multiples of 1
1SR 726.80
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RS Pro
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Phase
3
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SPDT
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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+60°C
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90mm
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Screw
-20 → +60°C
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17.5 x 90 x 66.5mm
66.5mm
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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
Add to parts list
RS Stock No.: 223-7795Brand: RS PROHSN Code: 85364900

SR 831.45

SR 831.45 Each (ex VAT)

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1

Available in multiples of 1
1SR 831.45
Add to basket
RS Pro
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Phase
3
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SPDT
Phase Loss, Voltage Assemmetry
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DIN Rail
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+60°C
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90mm
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Screw
-20 → +60°C
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17.5 x 90 x 66.5mm
66.5mm
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