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 Stock No.: 132-174Brand: RS PROHSN Code: 85364900

SR 174.29

SR 174.29 Each (ex VAT)

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RS Pro
Current
Single
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150 → 260V ac
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DIN Rail
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RS PRO Liquid Level Monitoring Relay, Single Phase, 150 → 260V ac, DIN Rail
RS Stock No.: 132-171Brand: RS PROHSN Code: 85364900

SR 160.36

SR 160.36 Each (ex VAT)

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RS Pro
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 Stock No.: 122-217Brand: RS PROHSN Code: 85364900

SR 78.22

SR 78.22 Each (ex VAT)

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RS Pro
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 Stock No.: 132-172Brand: RS PROHSN Code: 85364900

SR 105.75

SR 105.75 Each (ex VAT)

Add to basket
RS Pro
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 Stock No.: 132-173Brand: RS PROHSN Code: 85364900

SR 132.93

SR 132.93 Each (ex VAT)

Add to basket
RS Pro
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 Stock No.: 122-216Brand: RS PROHSN Code: 85364900

SR 106.56

SR 106.56 Each (ex VAT)

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RS Pro
Phase
Three
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380V ac
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-
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DIN Rail
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RS PRO Voltage Monitoring Relay, Single Phase, 220V ac, DIN Rail
RS Stock No.: 122-210Brand: RS PROHSN Code: 85364900

SR 121.66

SR 121.66 Each (ex VAT)

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RS Pro
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 Stock No.: 122-215Brand: RS PROHSN Code: 85364900

SR 161.38

SR 161.38 Each (ex VAT)

Add to basket
RS Pro
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, 380V ac, DIN Rail
RS Stock No.: 122-212Brand: RS PROHSN Code: 85364900

SR 142.89

SR 142.89 Each (ex VAT)

Add to basket
RS Pro
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 Stock No.: 102-6130Brand: RS PROHSN Code: 85364900

SR 448.21

SR 448.21 Each (ex VAT)

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RS Pro
Voltage
1
SPDT
12 → 24V dc
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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
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24V dc
12V dc
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-20°C
1
17.5 x 66.5 x 89mm
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66.5mm
17.5mm
+60°C
+60°C
Screw
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-
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89mm
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 102-6136Brand: RS PROHSN Code: 85364900

SR 488.85

SR 488.85 Each (ex VAT)

Add to basket
RS Pro
Phase, Voltage
3
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
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-20°C
1
17.5 x 66.5 x 89mm
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66.5mm
17.5mm
+60°C
+60°C
Screw
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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
89mm
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, Phase Loss, Voltage Assemmetry, DIN Rail
RS Stock No.: 223-7795Brand: RS PROHSN Code: 85364900

SR 806.12

SR 806.12 Each (ex VAT)

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

SR 467.10

SR 467.10 Each (ex VAT)

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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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Phase Failure, Phase Sequence
100ms
48 → 63Hz
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L
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280V
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-20°C
1
17.5 x 66.5 x 89mm
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66.5mm
17.5mm
+60°C
+60°C
Screw
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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
89mm
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 223-7789Brand: RS PROHSN Code: 85364900

SR 925.22

SR 925.22 Each (ex VAT)

Add to basket
RS Pro
Voltage
3
DPDT
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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-10°C
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36 x 90 x 67mm
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66.21mm
36mm
+60°C
-10 → +60°C
Screw
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RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 223-7790Brand: RS PROHSN Code: 85364900

SR 990.79

SR 990.79 Each (ex VAT)

Add to basket
RS Pro
Voltage
3
DPDT
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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-10°C
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36 x 90 x 67mm
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66.21mm
36mm
+60°C
-10 → +60°C
Screw
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90mm
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 223-7788Brand: RS PROHSN Code: 85364900

SR 859.94

SR 859.94 Each (ex VAT)

Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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-
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Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
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65Hz
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-10°C
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36 x 90 x 67mm
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66.21mm
36mm
+60°C
-10 → +60°C
Screw
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45Hz
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RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 223-7791Brand: RS PROHSN Code: 85364900

SR 820.56

SR 820.56 Each (ex VAT)

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

SR 858.54

SR 858.54 Each (ex VAT)

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

SR 858.54

SR 858.54 Each (ex VAT)

Add to basket
RS Pro
Current
1
SPDT
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-
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DIN Rail
1A
10A
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Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
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L
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-20°C
1
66.5 x 17.5 x 89mm
1 → 10A
66.5mm
17.5mm
+60°C
+60°C
Screw
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Green LED Indication for Supply Status
89mm
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 102-6137Brand: RS PROHSN Code: 85364900

SR 630.95

SR 630.95 Each (ex VAT)

Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
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Overvoltage, 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
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-20°C
1
17.5 x 66.5 x 89mm
-
66.5mm
17.5mm
+60°C
+60°C
Screw
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-
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
89mm

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