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 1300 products
RS Stock No.: 434-506Brand: RS PRO
€ 57.35
€ 57.35 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
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100A
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0.1 → 20s
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-20°C
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84.5mm
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Error Delay Time Adjustable
75mm
-20 to 55°C
44mm
55°C
44 x 84.5 x 75mm
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CE
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40 → 100A
RS Stock No.: 434-521Brand: RS PRO
€ 52.27
€ 52.27 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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Single
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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°C
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67.5mm
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Built-In Current Transformer, Built-In Contactor
90.3mm
-20 to 55°C
52.9mm
55°C
52.9 x 67.5 x 90.3mm
300V
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120V
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CE
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RS Stock No.: 434-520Brand: RS PRO
€ 41.62
€ 41.62 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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Three
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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°C
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84.5mm
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Phase Sequence Control, With PTC, Non-Neutral
75mm
-20 to 55°C
44mm
55°C
44 x 84.5 x 75mm
460V
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230V
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CE
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RS Stock No.: 132-174Brand: RS PRO
€ 28.92
€ 28.92 Each (Exc. Vat)
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1
RS Stock No.: 132-171Brand: RS PRO
€ 26.50
€ 26.50 Each (Exc. Vat)
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1
RS Stock No.: 122-217Brand: RS PRO
€ 13.07
€ 13.07 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-216Brand: RS PRO
€ 18.03
€ 18.03 Each (Exc. Vat)
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1
RS Stock No.: 132-172Brand: RS PRO
€ 17.91
€ 17.91 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-173Brand: RS PRO
€ 22.38
€ 22.38 Each (Exc. Vat)
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1
RS Stock No.: 122-215Brand: RS PRO
€ 27.47
€ 27.47 Each (Exc. Vat)
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1
RS Stock No.: 122-210Brand: RS PRO
€ 20.57
€ 20.57 Each (Exc. Vat)
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1
RS Stock No.: 122-212Brand: RS PRO
€ 24.08
€ 24.08 Each (Exc. Vat)
Check stock
1
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
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Undervoltage
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DIN Rail
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0 → 30s
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L
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-20°C
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17.5mm
1
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89mm
+60°C
66.5mm
+60°C
17.5 x 66.5 x 89mm
24V dc
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12V dc
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Screw
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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
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-20°C
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17.5mm
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
89mm
+60°C
66.5mm
+60°C
17.5 x 66.5 x 89mm
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Screw
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RS Stock No.: 223-7795Brand: RS PRO
€ 139.15
€ 139.15 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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90mm
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-20 → +60°C
66.5mm
+60°C
17.5 x 90 x 66.5mm
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Screw
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RS Stock No.: 102-6135Brand: RS PRO
€ 80.46
€ 80.46 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
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3
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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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-20°C
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17.5mm
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
89mm
+60°C
66.5mm
+60°C
17.5 x 66.5 x 89mm
280V
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Screw
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RS Stock No.: 223-7789Brand: RS PRO
€ 159.72
€ 159.72 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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36mm
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-10 → +60°C
66.21mm
+60°C
36 x 90 x 67mm
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Screw
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RS Stock No.: 223-7790Brand: RS PRO
€ 170.61
€ 170.61 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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-
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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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36mm
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90mm
-10 → +60°C
66.21mm
+60°C
36 x 90 x 67mm
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Screw
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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
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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
45Hz
36mm
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-10 → +60°C
66.21mm
+60°C
36 x 90 x 67mm
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65Hz
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Screw
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RS Stock No.: 223-7791Brand: RS PRO
€ 141.57
€ 141.57 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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90mm
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-20 → +60°C
66.5mm
+60°C
17.5 x 90 x 66.5mm
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Screw
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