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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 PRO

€ 41.69

€ 41.69 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 41.69
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RS Pro
Current
Single
-
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 PRO Liquid Level Monitoring Relay, Single Phase, 150 → 260V ac, DIN Rail
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RS Stock No.: 132-171Brand: RS PRO

€ 38.29

€ 38.29 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 38.29
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RS Pro
Liquid Level
Single
-
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 PRO

€ 18.90

€ 18.90 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 18.90
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RS Pro
Phase
Three
-
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.: 132-173Brand: RS PRO

€ 32.24

€ 32.24 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 32.24
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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.: 132-172Brand: RS PRO

€ 25.77

€ 25.77 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 25.77
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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.: 122-216Brand: RS PRO

€ 25.95

€ 25.95 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 25.95
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RS Pro
Phase
Three
-
380V 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.: 122-215Brand: RS PRO

€ 39.56

€ 39.56 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 39.56
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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 PRO

€ 29.61

€ 29.61 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 29.61
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RS Pro
Voltage
Single
-
220V ac
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-
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 PRO

€ 34.76

€ 34.76 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 34.76
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RS Pro
Voltage
Three
-
380V ac
-
-
DIN Rail
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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
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RS Stock No.: 223-7795Brand: RS PRO

€ 201.04

€ 201.04 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 201.04
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RS Pro
Phase
3
SPDT
Phase Loss, Voltage Assemmetry
-
-
DIN Rail
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Screw
-20°C
66.5mm
90mm
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-20 → +60°C
+60°C
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17.5 x 90 x 66.5mm
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RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
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RS Stock No.: 223-7789Brand: RS PRO

€ 230.39

€ 230.39 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 230.39
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RS Pro
Voltage
3
DPDT
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-
Overvoltage Protection, Undervoltage Protection
DIN Rail
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2 → 999s
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Screw
-10°C
66.21mm
36mm
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-10 → +60°C
+60°C
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36 x 90 x 67mm
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RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
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RS Stock No.: 223-7790Brand: RS PRO

€ 246.67

€ 246.67 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 246.67
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RS Pro
Voltage
3
DPDT
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
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2 → 999s
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Screw
-10°C
66.21mm
36mm
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-10 → +60°C
+60°C
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36 x 90 x 67mm
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90mm
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.: 223-7788Brand: RS PRO

€ 214.09

€ 214.09 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 214.09
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RS Pro
Phase, Voltage
3
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
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-
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Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
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Screw
-10°C
66.21mm
36mm
45Hz
-10 → +60°C
+60°C
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36 x 90 x 67mm
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65Hz
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RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
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RS Stock No.: 223-7791Brand: RS PRO

€ 204.60

€ 204.60 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 204.60
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RS Pro
Phase
3
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
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-
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Screw
-20°C
66.5mm
90mm
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-20 → +60°C
+60°C
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17.5 x 90 x 66.5mm
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RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 243 → 540 V, DIN Rail, Surface Mount
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 243 → 540 V, DIN Rail, Surface Mount
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RS Stock No.: 225-7388Brand: RS PRO

€ 208.12

€ 208.12 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 208.12
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RS Pro
Phase, Voltage
3
DPDT
243 → 540 V
-
Undervoltage
DIN Rail, Surface Mount
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-
-
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Phase Failure, Phase Sequence
0.2 → 10s
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-
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Screw
-20°C
89mm
17.5mm
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-20 → +60°C
+60°C
-
Microprocessor Based, Detects Incorrect Phase Sequence, Phase Loss And Neutral Loss, Adjustment For Under Voltage Trip Level, Adjustment For Time Delay
89 x 17.5 x 66.5mm
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540V
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243 V
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-
-
66.5mm
RS PRO Phase Monitoring Relay, 3 Phase, DIN Rail, Surface Mount
RS PRO Phase Monitoring Relay, 3 Phase, DIN Rail, Surface Mount
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RS Stock No.: 225-7384Brand: RS PRO

€ 105.49

€ 105.49 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 105.49
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RS Pro
Phase
3
-
-
-
-
DIN Rail, Surface Mount
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-
-
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-
Phase Failure, Phase Sequence
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Screw
-20°C
66.5mm
17.5mm
-
-20 → +60°C
+60°C
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3 LEDs for Phase presence status, Sequence Status,
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RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
Add to parts list
RS Stock No.: 225-7387Brand: RS PRO

€ 209.75

€ 209.75 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 209.75
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RS Pro
Phase, Voltage
3
DPDT
-
-
Overvoltage, Undervoltage
DIN Rail
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-
-
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-
Phase Failure, Phase Sequence
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Screw
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17.5mm
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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.: 225-7386Brand: RS PRO

€ 188.77

€ 188.77 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 188.77
Add to basket
RS Pro
Voltage
3
DPDT
-
-
Overvoltage, Undervoltage
DIN Rail
-
-
-
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Screw
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17.5mm
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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 PRO

€ 111.60

€ 111.60 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 111.60
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RS Pro
Voltage
1
SPDT
12 → 24V dc
-
Undervoltage
DIN Rail
-
-
-
-
-
-
0 → 30s
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L
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Screw
-20°C
66.5mm
17.5mm
-
+60°C
+60°C
-
-
17.5 x 66.5 x 89mm
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24V dc
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12V dc
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-
1
89mm
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 PRO

€ 121.73

€ 121.73 Each (Exc. Vat)

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1

Available in multiples of 1
1€ 121.73
Add to basket
RS Pro
Phase, Voltage
3
SPDT
-
-
Undervoltage
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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L
-
Screw
-20°C
66.5mm
17.5mm
-
+60°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
17.5 x 66.5 x 89mm
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1
89mm

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