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, 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

P.O.A.

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1P.O.A.
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RS Pro
-
Current
-
Three
-
-
1NO/1NC
-
-
-
-
-
DIN Rail Mount
-
40A
-
100A
-
-
0.1 → 20s
-
-
-
-
-
40 → 100A
-
-20°C
75mm
-
-
-
-
-20 to 55°C
84.5mm
-
44mm
CE
Error Delay Time Adjustable
55°C
-
-
44 x 84.5 x 75mm
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

P.O.A.

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1P.O.A.
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RS Pro
-
Voltage
-
Single
-
-
1NO
-
120 → 300V ac
-
Overvoltage
-
DIN Rail Mount
-
-
-
-
-
-
0.1 → 600s
-
-
-
-
-
-
-
-20°C
90.3mm
300V
120V
-
-
-20 to 55°C
67.5mm
-
52.9mm
CE
Built-In Current Transformer, Built-In Contactor
55°C
-
-
52.9 x 67.5 x 90.3mm
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

P.O.A.

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1P.O.A.
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RS Pro
-
Voltage
-
Three
-
-
1NO/1NC
-
230 → 460V ac
-
Overvoltage
-
DIN Rail or Panel
-
-
-
-
-
Phase Loss
0.1 → 10s
-
-
-
-
-
-
-
-20°C
75mm
460V
230V
-
-
-20 to 55°C
84.5mm
-
44mm
CE
Phase Sequence Control, With PTC, Non-Neutral
55°C
-
-
44 x 84.5 x 75mm
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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1SR 171.41
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RS Pro
-
Current
-
Single
-
-
-
-
150 → 260V ac
-
-
-
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 PROHSN Code: 85364900

SR 157.47

SR 157.47 Each (ex VAT)

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1SR 157.47
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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.: 122-216Brand: RS PROHSN Code: 85364900

SR 109.66

SR 109.66 Each (ex VAT)

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Available in multiples of 1
1SR 109.66
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RS Pro
-
Phase
-
Three
-
-
-
-
380V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
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-
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-
-
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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
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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.: 122-215Brand: RS PROHSN Code: 85364900

SR 166.08

SR 166.08 Each (ex VAT)

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Available in multiples of 1
1SR 166.08
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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, 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 125.18

SR 125.18 Each (ex VAT)

Check stock

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
Add to basket
RS Pro
-
Voltage
-
1
-
-
SPDT
-
12 → 24V dc
-
Undervoltage
-
DIN Rail
-
-
-
-
-
-
0 → 30s
-
-
-
L
-
-
-
-20°C
89mm
24V dc
12V dc
-
-
+60°C
17.5mm
-
66.5mm
-
-
+60°C
1
Screw
17.5 x 66.5 x 89mm
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.: 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
Add to basket
RS Pro
-
Phase, Voltage
-
3
-
-
SPDT
-
-
-
Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
-
-
-20°C
89mm
-
-
-
-
+60°C
17.5mm
-
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
+60°C
1
Screw
17.5 x 66.5 x 89mm
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
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-20°C
-
-
-
-
-
-20 → +60°C
90mm
-
66.5mm
-
-
+60°C
-
Screw
17.5 x 90 x 66.5mm
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
-
-
-
-20°C
89mm
280V
-
-
-
+60°C
17.5mm
-
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
+60°C
1
Screw
17.5 x 66.5 x 89mm
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.: 223-7789Brand: 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
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
-
-
-10°C
-
-
-
-
-
-10 → +60°C
36mm
-
66.21mm
-
-
+60°C
-
Screw
36 x 90 x 67mm
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
-
-
-
-
-
-
-
-10°C
90mm
-
-
-
-
-10 → +60°C
36mm
-
66.21mm
-
-
+60°C
-
Screw
36 x 90 x 67mm
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
-
-
-
-
-
-
-
-10°C
-
-
-
65Hz
-
-10 → +60°C
36mm
45Hz
66.21mm
-
-
+60°C
-
Screw
36 x 90 x 67mm
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
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-20°C
-
-
-
-
-
-20 → +60°C
90mm
-
66.5mm
-
-
+60°C
-
Screw
17.5 x 90 x 66.5mm

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