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
€ 59.49
€ 59.49 Each (Exc. Vat)
Check stock
1
RS Pro
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Current
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Three
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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75mm
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CE
Error Delay Time Adjustable
44 x 84.5 x 75mm
-20 to 55°C
84.5mm
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44mm
55°C
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40 → 100A
-20°C
RS Stock No.: 434-521Brand: RS PRO
€ 54.22
€ 54.22 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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Single
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
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CE
Built-In Current Transformer, Built-In Contactor
52.9 x 67.5 x 90.3mm
-20 to 55°C
67.5mm
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52.9mm
55°C
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120V
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300V
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-
-20°C
RS Stock No.: 434-520Brand: RS PRO
€ 43.17
€ 43.17 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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Three
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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Phase Loss
0.1 → 10s
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75mm
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CE
Phase Sequence Control, With PTC, Non-Neutral
44 x 84.5 x 75mm
-20 to 55°C
84.5mm
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44mm
55°C
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230V
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460V
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-20°C
RS Stock No.: 132-174Brand: RS PRO
€ 29.99
€ 29.99 Each (Exc. Vat)
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1
RS Stock No.: 132-171Brand: RS PRO
€ 27.48
€ 27.48 Each (Exc. Vat)
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1
RS Stock No.: 122-217Brand: RS PRO
€ 13.55
€ 13.55 Each (Exc. Vat)
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1
RS Stock No.: 122-216Brand: RS PRO
€ 18.70
€ 18.70 Each (Exc. Vat)
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1
RS Stock No.: 132-172Brand: RS PRO
€ 18.57
€ 18.57 Each (Exc. Vat)
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1
RS Stock No.: 132-173Brand: RS PRO
€ 23.22
€ 23.22 Each (Exc. Vat)
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1
RS Stock No.: 122-215Brand: RS PRO
€ 28.49
€ 28.49 Each (Exc. Vat)
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1
RS Stock No.: 122-210Brand: RS PRO
€ 21.34
€ 21.34 Each (Exc. Vat)
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1
RS Stock No.: 122-212Brand: RS PRO
€ 24.97
€ 24.97 Each (Exc. Vat)
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1
RS Stock No.: 102-6130Brand: RS PRO
€ 80.32
€ 80.32 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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1
SPDT
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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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89mm
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17.5 x 66.5 x 89mm
+60°C
17.5mm
Screw
1
66.5mm
+60°C
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12V dc
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24V dc
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-20°C
RS Stock No.: 102-6136Brand: RS PRO
€ 87.85
€ 87.85 Each (Exc. Vat)
Check stock
1
RS Pro
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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
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89mm
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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
17.5 x 66.5 x 89mm
+60°C
17.5mm
Screw
1
66.5mm
+60°C
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-20°C
RS Stock No.: 223-7795Brand: RS PRO
€ 144.32
€ 144.32 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase
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3
SPDT
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Phase Loss, Voltage Assemmetry
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DIN Rail
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17.5 x 90 x 66.5mm
-20 → +60°C
90mm
Screw
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66.5mm
+60°C
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-20°C
RS Stock No.: 102-6135Brand: RS PRO
€ 83.46
€ 83.46 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase, Voltage
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3
SPDT
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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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89mm
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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
17.5 x 66.5 x 89mm
+60°C
17.5mm
Screw
1
66.5mm
+60°C
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280V
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-20°C
RS Stock No.: 223-7789Brand: RS PRO
€ 165.66
€ 165.66 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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3
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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36 x 90 x 67mm
-10 → +60°C
36mm
Screw
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66.21mm
+60°C
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-10°C
RS Stock No.: 223-7790Brand: RS PRO
€ 176.96
€ 176.96 Each (Exc. Vat)
Check stock
1
RS Pro
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Voltage
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3
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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90mm
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36 x 90 x 67mm
-10 → +60°C
36mm
Screw
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66.21mm
+60°C
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-10°C
RS Stock No.: 223-7788Brand: RS PRO
€ 154.36
€ 154.36 Each (Exc. Vat)
Check stock
1
RS Pro
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Phase, Voltage
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3
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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45Hz
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36 x 90 x 67mm
-10 → +60°C
36mm
Screw
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66.21mm
+60°C
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65Hz
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-10°C
RS Stock No.: 223-7791Brand: RS PRO
€ 146.84
€ 146.84 Each (Exc. Vat)
Check stock
1
RS Pro
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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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17.5 x 90 x 66.5mm
-20 → +60°C
90mm
Screw
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66.5mm
+60°C
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-20°C
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