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 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
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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
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Current
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Three
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1NO/1NC
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-
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DIN Rail Mount
40A
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100A
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0.1 → 20s
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44 x 84.5 x 75mm
44mm
CE
-
84.5mm
55°C
-20°C
-20 to 55°C
Error Delay Time Adjustable
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75mm
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40 → 100A
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
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Liquid Level
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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 80.95

SR 80.95 Each (ex VAT)

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1

Available in multiples of 1
1SR 80.95
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RS Pro
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Phase
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Three
-
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.: 132-172Brand: RS PROHSN Code: 85364900

SR 109.36

SR 109.36 Each (ex VAT)

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1

Available in multiples of 1
1SR 109.36
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RS Pro
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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.: 132-173Brand: RS PROHSN Code: 85364900

SR 137.48

SR 137.48 Each (ex VAT)

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1

Available in multiples of 1
1SR 137.48
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RS Pro
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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.: 122-216Brand: RS PROHSN Code: 85364900

SR 110.16

SR 110.16 Each (ex VAT)

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1

Available in multiples of 1
1SR 110.16
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RS Pro
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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, 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 310.94

SR 310.94 Each (ex VAT)

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1

Available in multiples of 1
1SR 310.94
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RS Pro
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Voltage
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1
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150 → 300V ac
CO
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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 303.77

SR 303.77 Each (ex VAT)

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1

Available in multiples of 1
1SR 303.77
Add to basket
RS Pro
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Voltage
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1
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150 → 300V ac
CO
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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
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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
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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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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
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RS Stock No.: 558-897Brand: RS PROHSN Code: 85364900

SR 221.39

SR 221.39 Each (ex VAT)

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1

Available in multiples of 1
1SR 221.39
Add to basket
RS Pro
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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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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 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
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Voltage
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Single
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120 → 300V ac
1NO
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Overvoltage
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DIN Rail Mount
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0.1 → 600s
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52.9 x 67.5 x 90.3mm
52.9mm
CE
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67.5mm
55°C
-20°C
-20 to 55°C
Built-In Current Transformer, Built-In Contactor
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90.3mm
300V
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
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RS Stock No.: 122-210Brand: RS PROHSN Code: 85364900

SR 121.69

SR 121.69 Each (ex VAT)

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1

Available in multiples of 1
1SR 121.69
Add to basket
RS Pro
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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 166.67

SR 166.67 Each (ex VAT)

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1

Available in multiples of 1
1SR 166.67
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RS Pro
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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 246.66

SR 246.66 Each (ex VAT)

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1

Available in multiples of 1
1SR 246.66
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RS Pro
-
Voltage
-
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Three
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230 → 460V ac
1NO/1NC
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Overvoltage
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DIN Rail or Panel
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Phase Loss
0.1 → 10s
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44 x 84.5 x 75mm
44mm
CE
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84.5mm
55°C
-20°C
-20 to 55°C
Phase Sequence Control, With PTC, Non-Neutral
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75mm
460V
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 147.76

SR 147.76 Each (ex VAT)

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1

Available in multiples of 1
1SR 147.76
Add to basket
RS Pro
-
Voltage
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-
Three
-
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 462.02

SR 462.02 Each (ex VAT)

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1

Available in multiples of 1
1SR 462.02
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RS Pro
-
Voltage
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-
1
-
12 → 24V dc
SPDT
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Undervoltage
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-
DIN Rail
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-
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0 → 30s
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L
17.5 x 66.5 x 89mm
66.5mm
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Screw
17.5mm
+60°C
-20°C
+60°C
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1
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89mm
24V dc
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 503.95

SR 503.95 Each (ex VAT)

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Available in multiples of 1
1SR 503.95
Add to basket
RS Pro
-
Phase, Voltage
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-
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
0.2 → 10s
48 → 63Hz
-
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L
17.5 x 66.5 x 89mm
66.5mm
-
Screw
17.5mm
+60°C
-20°C
+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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89mm
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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 830.83

SR 830.83 Each (ex VAT)

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Available in multiples of 1
1SR 830.83
Add to basket
RS Pro
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Phase
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3
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Phase Loss, Voltage Assemmetry
SPDT
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DIN Rail
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17.5 x 90 x 66.5mm
66.5mm
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Screw
90mm
+60°C
-20°C
-20 → +60°C
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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 481.54

SR 481.54 Each (ex VAT)

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Available in multiples of 1
1SR 481.54
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RS Pro
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Phase, Voltage
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3
-
Maximum of 280 V
SPDT
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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
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L
17.5 x 66.5 x 89mm
66.5mm
-
Screw
17.5mm
+60°C
-20°C
+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
1
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89mm
280V
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