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 1274 products
RS Stock No.: 434-506Brand: RS PRO
€ 57.60
€ 57.60 Each (Exc. Vat)
Check stock
1
RS Pro
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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-20°C
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Error Delay Time Adjustable
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40 → 100A
44 x 84.5 x 75mm
84.5mm
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55°C
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75mm
CE
-20 to 55°C
44mm
RS Stock No.: 558-898Brand: RS PRO
€ 51.91
€ 51.91 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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1
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CO
150 → 300V ac
Overvoltage, Undervoltage
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DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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RS Stock No.: 558-901Brand: RS PRO
€ 51.42
€ 51.42 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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1
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CO
150 → 300V ac
Overvoltage, Undervoltage
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DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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RS Stock No.: 558-892Brand: RS PRO
€ 44.16
€ 44.16 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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3
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CO
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Voltage Asymmetry
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DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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RS Stock No.: 558-897Brand: RS PRO
€ 37.51
€ 37.51 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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3
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CO
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Voltage Asymmetry
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DIN Rail
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Screw
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CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
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RS Stock No.: 434-521Brand: RS PRO
€ 52.51
€ 52.51 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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Single
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1NO
120 → 300V ac
Overvoltage
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DIN Rail Mount
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0.1 → 600s
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-20°C
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Built-In Current Transformer, Built-In Contactor
300V
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120V
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52.9 x 67.5 x 90.3mm
67.5mm
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55°C
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90.3mm
CE
-20 to 55°C
52.9mm
RS Stock No.: 434-520Brand: RS PRO
€ 41.74
€ 41.74 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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Three
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1NO/1NC
230 → 460V ac
Overvoltage
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DIN Rail or Panel
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Phase Loss
0.1 → 10s
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-20°C
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Phase Sequence Control, With PTC, Non-Neutral
460V
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230V
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44 x 84.5 x 75mm
84.5mm
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55°C
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75mm
CE
-20 to 55°C
44mm
RS Stock No.: 102-6130Brand: RS PRO
€ 77.44
€ 77.44 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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1
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SPDT
12 → 24V dc
Undervoltage
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DIN Rail
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0 → 30s
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L
-20°C
1
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24V dc
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12V dc
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17.5 x 66.5 x 89mm
17.5mm
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+60°C
Screw
89mm
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+60°C
66.5mm
RS Stock No.: 102-6136Brand: RS PRO
€ 84.70
€ 84.70 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
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3
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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
-20°C
1
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
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17.5 x 66.5 x 89mm
17.5mm
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+60°C
Screw
89mm
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+60°C
66.5mm
RS Stock No.: 223-7792Brand: RS PRO
€ 122.21
€ 122.21 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
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3
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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
90mm
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+60°C
Screw
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-20 → +60°C
66.5mm
RS Stock No.: 223-7795Brand: RS PRO
€ 140.36
€ 140.36 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
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3
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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
90mm
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+60°C
Screw
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-20 → +60°C
66.5mm
RS Stock No.: 102-6135Brand: RS PRO
€ 81.07
€ 81.07 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
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3
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SPDT
Maximum of 280 V
Undervoltage
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DIN Rail
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Phase Failure, Phase Sequence
100ms
48 → 63Hz
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L
-20°C
1
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
280V
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17.5 x 66.5 x 89mm
17.5mm
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+60°C
Screw
89mm
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+60°C
66.5mm
RS Stock No.: 223-7789Brand: RS PRO
€ 160.93
€ 160.93 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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3
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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
36mm
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+60°C
Screw
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-10 → +60°C
66.21mm
RS Stock No.: 223-7790Brand: RS PRO
€ 171.82
€ 171.82 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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3
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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
36mm
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+60°C
Screw
90mm
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-10 → +60°C
66.21mm
RS Stock No.: 223-7788Brand: RS PRO
€ 148.83
€ 148.83 Each (Exc. Vat)
Check stock
1
RS Pro
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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-10°C
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65Hz
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36 x 90 x 67mm
36mm
45Hz
+60°C
Screw
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-
-10 → +60°C
66.21mm
RS Stock No.: 223-7791Brand: RS PRO
€ 142.78
€ 142.78 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
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3
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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
90mm
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+60°C
Screw
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-20 → +60°C
66.5mm
RS Stock No.: 102-6133Brand: RS PRO
€ 148.83
€ 148.83 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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1
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SPDT
Maximum of 500 V
Overvoltage, Undervoltage
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DIN Rail
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0.1 → 30s
48 → 63Hz
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L
-20°C
1
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500V
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17.5 x 66.5 x 89mm
17.5mm
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+60°C
Screw
89mm
-
+60°C
66.5mm
RS Stock No.: 102-6134Brand: RS PRO
€ 148.83
€ 148.83 Each (Exc. Vat)
Check stock
1
RS Pro
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
-20°C
1
Green LED Indication for Supply Status
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1 → 10A
66.5 x 17.5 x 89mm
17.5mm
-
+60°C
Screw
89mm
-
+60°C
66.5mm
RS Stock No.: 102-6137Brand: RS PRO
€ 109.50
€ 109.50 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
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3
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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
-20°C
1
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
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17.5 x 66.5 x 89mm
17.5mm
-
+60°C
Screw
89mm
-
+60°C
66.5mm
RS Stock No.: 225-7388Brand: RS PRO
€ 145.20
€ 145.20 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
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-
3
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DPDT
243 → 540 V
Undervoltage
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DIN Rail, Surface Mount
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Phase Failure, Phase Sequence
0.2 → 10s
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-20°C
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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
540V
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243 V
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89 x 17.5 x 66.5mm
17.5mm
-
+60°C
Screw
66.5mm
-
-20 → +60°C
89mm
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