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...
Showing 1-20 of 1304 products
RS Stock No.: 434-506Brand: RS PRO
€ 57.35
€ 57.35 Each (Exc. Vat)
Check stock
1
RS Pro
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Current
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Three
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1NO/1NC
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DIN Rail Mount
40A
100A
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0.1 → 20s
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55°C
44mm
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CE
Error Delay Time Adjustable
-20°C
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40 → 100A
84.5mm
44 x 84.5 x 75mm
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-
-
-
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-
-20 to 55°C
75mm
RS Stock No.: 434-521Brand: RS PRO
€ 52.27
€ 52.27 Each (Exc. Vat)
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1
RS Pro
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Voltage
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Single
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120 → 300V ac
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1NO
Overvoltage
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DIN Rail Mount
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0.1 → 600s
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55°C
52.9mm
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CE
Built-In Current Transformer, Built-In Contactor
-20°C
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-
67.5mm
52.9 x 67.5 x 90.3mm
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120V
300V
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-
-
-20 to 55°C
90.3mm
RS Stock No.: 434-520Brand: RS PRO
€ 41.62
€ 41.62 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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Three
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230 → 460V ac
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1NO/1NC
Overvoltage
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DIN Rail or Panel
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Phase Loss
0.1 → 10s
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-
55°C
44mm
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CE
Phase Sequence Control, With PTC, Non-Neutral
-20°C
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-
84.5mm
44 x 84.5 x 75mm
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230V
460V
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-
-20 to 55°C
75mm
RS Stock No.: 102-6130Brand: RS PRO
€ 77.44
€ 77.44 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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1
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12 → 24V dc
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SPDT
Undervoltage
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DIN Rail
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-
-
-
-
0 → 30s
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L
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+60°C
66.5mm
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-20°C
1
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17.5mm
17.5 x 66.5 x 89mm
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12V dc
24V dc
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Screw
+60°C
89mm
RS Stock No.: 102-6136Brand: RS PRO
€ 84.70
€ 84.70 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase, Voltage
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3
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SPDT
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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+60°C
66.5mm
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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
-20°C
1
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17.5mm
17.5 x 66.5 x 89mm
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-
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Screw
+60°C
89mm
RS Stock No.: 223-7795Brand: RS PRO
€ 139.15
€ 139.15 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase
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3
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Phase Loss, Voltage Assemmetry
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SPDT
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DIN Rail
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+60°C
66.5mm
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-20°C
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90mm
17.5 x 90 x 66.5mm
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Screw
-20 → +60°C
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RS Stock No.: 102-6135Brand: RS PRO
€ 80.46
€ 80.46 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase, Voltage
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3
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Maximum of 280 V
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SPDT
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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+60°C
66.5mm
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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
-20°C
1
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17.5mm
17.5 x 66.5 x 89mm
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280V
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Screw
+60°C
89mm
RS Stock No.: 223-7789Brand: RS PRO
€ 159.72
€ 159.72 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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3
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DPDT
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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+60°C
66.21mm
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-10°C
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36mm
36 x 90 x 67mm
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Screw
-10 → +60°C
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RS Stock No.: 223-7790Brand: RS PRO
€ 170.61
€ 170.61 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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3
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DPDT
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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+60°C
66.21mm
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-10°C
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36mm
36 x 90 x 67mm
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Screw
-10 → +60°C
90mm
RS Stock No.: 223-7788Brand: RS PRO
€ 148.83
€ 148.83 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase, Voltage
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3
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SPDT
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
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+60°C
66.21mm
45Hz
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-10°C
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36mm
36 x 90 x 67mm
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65Hz
Screw
-10 → +60°C
-
RS Stock No.: 223-7791Brand: RS PRO
€ 141.57
€ 141.57 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase
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3
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SPDT
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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+60°C
66.5mm
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-20°C
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90mm
17.5 x 90 x 66.5mm
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Screw
-20 → +60°C
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RS Stock No.: 102-6133Brand: RS PRO
€ 148.83
€ 148.83 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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1
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Maximum of 500 V
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SPDT
Overvoltage, Undervoltage
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DIN Rail
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0.1 → 30s
48 → 63Hz
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L
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+60°C
66.5mm
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-20°C
1
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17.5mm
17.5 x 66.5 x 89mm
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500V
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Screw
+60°C
89mm
RS Stock No.: 102-6134Brand: RS PRO
€ 148.83
€ 148.83 Each (Exc. Vat)
Check stock
1
RS Pro
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Current
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1
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SPDT
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DIN Rail
1A
10A
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Overcurrent, Undercurrent
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0.1 → 30s
48 → 63Hz
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L
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+60°C
66.5mm
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Green LED Indication for Supply Status
-20°C
1
1 → 10A
17.5mm
66.5 x 17.5 x 89mm
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Screw
+60°C
89mm
RS Stock No.: 102-6137Brand: RS PRO
€ 108.90
€ 108.90 Each (Exc. Vat)
Check stock
1
RS Pro
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-
Phase, Voltage
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3
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SPDT
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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+60°C
66.5mm
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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
-20°C
1
-
17.5mm
17.5 x 66.5 x 89mm
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-
-
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Screw
+60°C
89mm
RS Stock No.: 225-7388Brand: RS PRO
€ 143.99
€ 143.99 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase, Voltage
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3
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243 → 540 V
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DPDT
Undervoltage
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DIN Rail, Surface Mount
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Phase Failure, Phase Sequence
0.2 → 10s
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+60°C
89mm
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Microprocessor Based, Detects Incorrect Phase Sequence, Phase Loss And Neutral Loss, Adjustment For Under Voltage Trip Level, Adjustment For Time Delay
-20°C
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17.5mm
89 x 17.5 x 66.5mm
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243 V
540V
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Screw
-20 → +60°C
66.5mm
RS Stock No.: 225-7384Brand: RS PRO
€ 73.20
€ 73.20 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase
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3
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DIN Rail, Surface Mount
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Phase Failure, Phase Sequence
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+60°C
66.5mm
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3 LEDs for Phase presence status, Sequence Status,
-20°C
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17.5mm
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Screw
-20 → +60°C
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RS Stock No.: 225-7387Brand: RS PRO
€ 145.20
€ 145.20 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase, Voltage
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3
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DPDT
Overvoltage, Undervoltage
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DIN Rail
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Phase Failure, Phase Sequence
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17.5mm
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Screw
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RS Stock No.: 102-6131Brand: RS PRO
€ 84.10
€ 84.10 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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1
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SPDT
Overvoltage, Undervoltage
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DIN Rail
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-
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0.2 → 10s
48 → 63Hz
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L
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+60°C
66.5mm
63Hz
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2 LEDs for the Indication of Operational States, Adjustment for Time Delay, Adjustment for Undervoltage Trip Level, Microprocessor Based Relay, Monitors Own Supply & Detects if The Supply Exceeds The Set Under or Over Voltage Trip Levels, True RMS Monitoring
-20°C
1
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17.5mm
17.5 x 66.5 x 89mm
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-
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48Hz
Screw
+60°C
89mm
RS Stock No.: 225-7386Brand: RS PRO
€ 130.68
€ 130.68 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-174Brand: RS PRO
€ 28.92
€ 28.92 Each (Exc. Vat)
Check stock
1
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