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 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 311.62

SR 311.62 Each (ex VAT)

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1

Available in multiples of 1
1SR 311.62
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RS Pro
Voltage
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-
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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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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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 310.26

SR 310.26 Each (ex VAT)

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1

Available in multiples of 1
1SR 310.26
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RS Pro
Voltage
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-
1
-
-
CO
150 → 300V ac
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-
Overvoltage, Undervoltage
-
DIN Rail
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-
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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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
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RS Stock No.: 558-897Brand: RS PROHSN Code: 85364900

SR 227.87

SR 227.87 Each (ex VAT)

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1

Available in multiples of 1
1SR 227.87
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RS Pro
Voltage
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3
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-
CO
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-
Voltage Asymmetry
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DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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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
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RS Stock No.: 558-892Brand: RS PROHSN Code: 85364900

SR 260.43

SR 260.43 Each (ex VAT)

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1

Available in multiples of 1
1SR 260.43
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RS Pro
Voltage
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-
3
-
-
CO
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-
Voltage Asymmetry
-
DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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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 171.41

SR 171.41 Each (ex VAT)

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1

Available in multiples of 1
1SR 171.41
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RS Pro
Current
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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 339.96

SR 339.96 Each (ex VAT)

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1

Available in multiples of 1
1SR 339.96
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RS Pro
Current
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-
Three
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-
1NO/1NC
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DIN Rail Mount
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40A
-
100A
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-
0.1 → 20s
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-20°C
44mm
40 → 100A
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-
75mm
CE
55°C
Error Delay Time Adjustable
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-
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-
44 x 84.5 x 75mm
-20 to 55°C
84.5mm
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 157.47

SR 157.47 Each (ex VAT)

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1

Available in multiples of 1
1SR 157.47
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RS Pro
Liquid Level
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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 PROHSN Code: 85364900

SR 81.42

SR 81.42 Each (ex VAT)

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1

Available in multiples of 1
1SR 81.42
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RS Pro
Phase
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-
Three
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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, 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 110.66

SR 110.66 Each (ex VAT)

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1

Available in multiples of 1
1SR 110.66
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RS Pro
Phase
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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
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RS Stock No.: 132-172Brand: RS PROHSN Code: 85364900

SR 109.86

SR 109.86 Each (ex VAT)

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1

Available in multiples of 1
1SR 109.86
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RS Pro
Phase
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-
Three
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-
380V ac
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-
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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 PROHSN Code: 85364900

SR 138.18

SR 138.18 Each (ex VAT)

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1

Available in multiples of 1
1SR 138.18
Add to basket
RS Pro
Phase
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Three
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380V ac
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DIN Rail
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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
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RS Stock No.: 434-521Brand: RS PROHSN Code: 85364900

SR 310.06

SR 310.06 Each (ex VAT)

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1

Available in multiples of 1
1SR 310.06
Add to basket
RS Pro
Voltage
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-
Single
-
-
1NO
120 → 300V ac
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-
Overvoltage
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DIN Rail Mount
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-
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-
0.1 → 600s
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-
-20°C
52.9mm
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-
90.3mm
CE
55°C
Built-In Current Transformer, Built-In Contactor
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-
-
300V
120V
52.9 x 67.5 x 90.3mm
-20 to 55°C
67.5mm
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 126.35

SR 126.35 Each (ex VAT)

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1

Available in multiples of 1
1SR 126.35
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RS Pro
Voltage
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-
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.: 122-215Brand: RS PROHSN Code: 85364900

SR 167.24

SR 167.24 Each (ex VAT)

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1

Available in multiples of 1
1SR 167.24
Add to basket
RS Pro
Voltage
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-
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
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RS Stock No.: 434-520Brand: RS PROHSN Code: 85364900

SR 258.08

SR 258.08 Each (ex VAT)

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1

Available in multiples of 1
1SR 258.08
Add to basket
RS Pro
Voltage
-
-
Three
-
-
1NO/1NC
230 → 460V ac
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-
Overvoltage
-
DIN Rail or Panel
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-
-
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Phase Loss
0.1 → 10s
-
-
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-
-20°C
44mm
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-
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-
75mm
CE
55°C
Phase Sequence Control, With PTC, Non-Neutral
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-
460V
230V
44 x 84.5 x 75mm
-20 to 55°C
84.5mm
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 148.44

SR 148.44 Each (ex VAT)

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1

Available in multiples of 1
1SR 148.44
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
Add to parts list
RS Stock No.: 102-6130Brand: RS PROHSN Code: 85364900

SR 462.48

SR 462.48 Each (ex VAT)

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1

Available in multiples of 1
1SR 462.48
Add to basket
RS Pro
Voltage
-
-
1
-
-
SPDT
12 → 24V dc
-
-
Undervoltage
-
DIN Rail
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-
-
-
-
-
0 → 30s
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-
-
L
-20°C
66.5mm
-
-
Screw
1
89mm
-
+60°C
-
-
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-
24V dc
12V dc
17.5 x 66.5 x 89mm
+60°C
17.5mm
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 504.44

SR 504.44 Each (ex VAT)

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1

Available in multiples of 1
1SR 504.44
Add to basket
RS Pro
Phase, Voltage
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-
3
-
-
SPDT
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-
-
Undervoltage
-
DIN Rail
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-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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-
L
-20°C
66.5mm
-
-
Screw
1
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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17.5 x 66.5 x 89mm
+60°C
17.5mm
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 831.44

SR 831.44 Each (ex VAT)

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1

Available in multiples of 1
1SR 831.44
Add to basket
RS Pro
Phase
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-
3
-
-
SPDT
Phase Loss, Voltage Assemmetry
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-
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DIN Rail
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-20°C
66.5mm
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Screw
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+60°C
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17.5 x 90 x 66.5mm
-20 → +60°C
90mm
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 482.05

SR 482.05 Each (ex VAT)

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1

Available in multiples of 1
1SR 482.05
Add to basket
RS Pro
Phase, Voltage
-
-
3
-
-
SPDT
Maximum of 280 V
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-
Undervoltage
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DIN Rail
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-
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Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
-20°C
66.5mm
-
-
Screw
1
89mm
-
+60°C
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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280V
-
17.5 x 66.5 x 89mm
+60°C
17.5mm

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