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 1301 products
RS Stock No.: 434-506Brand: RS PRO
€ 58.78
€ 58.78 Each (Exc. Vat)
Check stock
1
RS Pro
Current
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-
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Three
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1NO/1NC
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-
-
-
-
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DIN Rail Mount
40A
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100A
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-
0.1 → 20s
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-
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75mm
84.5mm
40 → 100A
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-
-
-
-
CE
Error Delay Time Adjustable
44mm
-
44 x 84.5 x 75mm
-20 to 55°C
55°C
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-20°C
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RS Stock No.: 434-521Brand: RS PRO
€ 53.57
€ 53.57 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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-
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Single
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1NO
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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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90.3mm
67.5mm
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-
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120V
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300V
CE
Built-In Current Transformer, Built-In Contactor
52.9mm
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52.9 x 67.5 x 90.3mm
-20 to 55°C
55°C
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-20°C
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RS Stock No.: 434-520Brand: RS PRO
€ 42.66
€ 42.66 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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-
-
Three
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1NO/1NC
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230 → 460V ac
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Overvoltage
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DIN Rail or Panel
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-
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Phase Loss
0.1 → 10s
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75mm
84.5mm
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-
-
230V
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460V
CE
Phase Sequence Control, With PTC, Non-Neutral
44mm
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44 x 84.5 x 75mm
-20 to 55°C
55°C
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-20°C
-
RS Stock No.: 132-174Brand: RS PRO
€ 29.64
€ 29.64 Each (Exc. Vat)
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1
RS Stock No.: 132-171Brand: RS PRO
€ 27.16
€ 27.16 Each (Exc. Vat)
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1
RS Stock No.: 122-217Brand: RS PRO
€ 13.39
€ 13.39 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-216Brand: RS PRO
€ 18.48
€ 18.48 Each (Exc. Vat)
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1
RS Stock No.: 132-172Brand: RS PRO
€ 18.35
€ 18.35 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-173Brand: RS PRO
€ 22.94
€ 22.94 Each (Exc. Vat)
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1
RS Stock No.: 122-215Brand: RS PRO
€ 28.15
€ 28.15 Each (Exc. Vat)
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1
RS Stock No.: 122-210Brand: RS PRO
€ 21.08
€ 21.08 Each (Exc. Vat)
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1
RS Stock No.: 122-212Brand: RS PRO
€ 24.68
€ 24.68 Each (Exc. Vat)
Check stock
1
RS Stock No.: 102-6130Brand: RS PRO
€ 79.36
€ 79.36 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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-
1
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SPDT
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12 → 24V dc
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Undervoltage
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DIN Rail
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-
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0 → 30s
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L
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89mm
17.5mm
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12V dc
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24V dc
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-
66.5mm
Screw
17.5 x 66.5 x 89mm
+60°C
+60°C
-
-20°C
1
RS Stock No.: 102-6136Brand: RS PRO
€ 86.80
€ 86.80 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
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-
-
3
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SPDT
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-
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Undervoltage
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DIN Rail
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-
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Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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L
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89mm
17.5mm
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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
66.5mm
Screw
17.5 x 66.5 x 89mm
+60°C
+60°C
-
-20°C
1
RS Stock No.: 223-7795Brand: RS PRO
€ 142.60
€ 142.60 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
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-
-
3
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SPDT
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Phase Loss, Voltage Assemmetry
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DIN Rail
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90mm
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66.5mm
Screw
17.5 x 90 x 66.5mm
-20 → +60°C
+60°C
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-20°C
-
RS Stock No.: 102-6135Brand: RS PRO
€ 82.46
€ 82.46 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
-
-
-
3
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SPDT
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Maximum of 280 V
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Undervoltage
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DIN Rail
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-
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Phase Failure, Phase Sequence
100ms
48 → 63Hz
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L
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89mm
17.5mm
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280V
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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
66.5mm
Screw
17.5 x 66.5 x 89mm
+60°C
+60°C
-
-20°C
1
RS Stock No.: 223-7789Brand: RS PRO
€ 163.68
€ 163.68 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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-
-
3
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DPDT
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-
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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36mm
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66.21mm
Screw
36 x 90 x 67mm
-10 → +60°C
+60°C
-
-10°C
-
RS Stock No.: 223-7790Brand: RS PRO
€ 174.84
€ 174.84 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
-
3
-
DPDT
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-
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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90mm
36mm
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-
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-
66.21mm
Screw
36 x 90 x 67mm
-10 → +60°C
+60°C
-
-10°C
-
RS Stock No.: 223-7788Brand: RS PRO
€ 152.52
€ 152.52 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
-
-
-
3
-
SPDT
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-
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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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36mm
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65Hz
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66.21mm
Screw
36 x 90 x 67mm
-10 → +60°C
+60°C
45Hz
-10°C
-
RS Stock No.: 223-7791Brand: RS PRO
€ 145.08
€ 145.08 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
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-
-
3
-
SPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
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-
DIN Rail
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90mm
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66.5mm
Screw
17.5 x 90 x 66.5mm
-20 → +60°C
+60°C
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-20°C
-
...