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

€ 49.36

€ 49.36 Each (Exc. VAT)

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Available in multiples of 1
1€ 49.36
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RS Pro
Current
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Single
-
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 PRO

€ 97.87

€ 97.87 Each (Exc. VAT)

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Available in multiples of 1
1€ 97.87
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RS Pro
Current
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Three
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 to 55°C
-20°C
55°C
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-
84.5mm
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CE
44 x 84.5 x 75mm
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40 → 100A
75mm
Error Delay Time Adjustable
44mm
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

€ 45.35

€ 45.35 Each (Exc. VAT)

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1€ 45.35
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RS Pro
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 PRO

€ 22.36

€ 22.36 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 22.36
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RS Pro
Phase
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-
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.: 122-216Brand: RS PRO

€ 30.73

€ 30.73 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 30.73
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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 PRO

€ 30.50

€ 30.50 Each (Exc. VAT)

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Available in multiples of 1
1€ 30.50
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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.: 132-173Brand: RS PRO

€ 38.16

€ 38.16 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 38.16
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RS Pro
Phase
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Three
-
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 PRO

€ 88.16

€ 88.16 Each (Exc. VAT)

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Available in multiples of 1
1€ 88.16
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RS Pro
Voltage
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1
CO
150 → 300V ac
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-
Overvoltage, Undervoltage
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DIN Rail
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Screw
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 PRO

€ 87.46

€ 87.46 Each (Exc. VAT)

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Available in multiples of 1
1€ 87.46
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RS Pro
Voltage
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1
CO
150 → 300V ac
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Overvoltage, Undervoltage
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DIN Rail
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Screw
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 PRO

€ 74.99

€ 74.99 Each (Exc. VAT)

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Available in multiples of 1
1€ 74.99
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RS Pro
Voltage
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3
CO
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Voltage Asymmetry
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DIN Rail
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Screw
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 PRO

€ 63.72

€ 63.72 Each (Exc. VAT)

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Available in multiples of 1
1€ 63.72
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RS Pro
Voltage
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3
CO
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Voltage Asymmetry
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DIN Rail
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Screw
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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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 PRO

€ 89.28

€ 89.28 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 89.28
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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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0.1 → 600s
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-20 to 55°C
-20°C
55°C
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67.5mm
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CE
52.9 x 67.5 x 90.3mm
300V
120V
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90.3mm
Built-In Current Transformer, Built-In Contactor
52.9mm
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

€ 35.05

€ 35.05 Each (Exc. VAT)

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Available in multiples of 1
1€ 35.05
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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
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RS Stock No.: 122-215Brand: RS PRO

€ 46.80

€ 46.80 Each (Exc. VAT)

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1

Available in multiples of 1
1€ 46.80
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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, 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 PRO

€ 71.01

€ 71.01 Each (Exc. VAT)

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1€ 71.01
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RS Pro
Voltage
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-
Three
1NO/1NC
230 → 460V ac
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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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-20 to 55°C
-20°C
55°C
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84.5mm
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CE
44 x 84.5 x 75mm
460V
230V
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75mm
Phase Sequence Control, With PTC, Non-Neutral
44mm
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

€ 41.18

€ 41.18 Each (Exc. VAT)

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Available in multiples of 1
1€ 41.18
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RS Pro
Voltage
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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, 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

€ 132.10

€ 132.10 Each (Exc. VAT)

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1€ 132.10
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RS Pro
Voltage
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1
SPDT
12 → 24V dc
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-
Undervoltage
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DIN Rail
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0 → 30s
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L
+60°C
-20°C
+60°C
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1
17.5mm
Screw
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17.5 x 66.5 x 89mm
24V dc
12V dc
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89mm
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66.5mm
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 PRO

€ 144.11

€ 144.11 Each (Exc. VAT)

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1€ 144.11
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RS Pro
Phase, Voltage
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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
+60°C
-20°C
+60°C
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1
17.5mm
Screw
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17.5 x 66.5 x 89mm
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89mm
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
66.5mm
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.: 223-7792Brand: RS PRO

€ 207.99

€ 207.99 Each (Exc. VAT)

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1€ 207.99
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RS Pro
Phase
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3
SPDT
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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-20 → +60°C
-20°C
+60°C
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90mm
Screw
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17.5 x 90 x 66.5mm
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66.5mm
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 PRO

€ 237.97

€ 237.97 Each (Exc. VAT)

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1€ 237.97
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RS Pro
Phase
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3
SPDT
Phase Loss, Voltage Assemmetry
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-
DIN Rail
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-20 → +60°C
-20°C
+60°C
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90mm
Screw
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17.5 x 90 x 66.5mm
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66.5mm

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