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 1294 products
RS Pro
Current
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Three
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1NO/1NC
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DIN Rail Mount
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40A
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100A
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0.1 → 20s
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55°C
75mm
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CE
84.5mm
Error Delay Time Adjustable
44mm
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-20°C
-20 to 55°C
44 x 84.5 x 75mm
40 → 100A
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RS Pro
Voltage
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Single
120 → 300V ac
1NO
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Overvoltage
DIN Rail Mount
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0.1 → 600s
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55°C
90.3mm
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CE
67.5mm
Built-In Current Transformer, Built-In Contactor
52.9mm
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120V
300V
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-20°C
-20 to 55°C
52.9 x 67.5 x 90.3mm
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RS Pro
Voltage
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Three
230 → 460V ac
1NO/1NC
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Overvoltage
DIN Rail or Panel
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Phase Loss
0.1 → 10s
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55°C
75mm
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CE
84.5mm
Phase Sequence Control, With PTC, Non-Neutral
44mm
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230V
460V
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-20°C
-20 to 55°C
44 x 84.5 x 75mm
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RS Pro
Voltage
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1
12 → 24V dc
SPDT
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Undervoltage
DIN Rail
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0 → 30s
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L
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+60°C
89mm
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17.5mm
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66.5mm
Screw
1
12V dc
24V dc
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-20°C
+60°C
17.5 x 66.5 x 89mm
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RS Pro
Phase, Voltage
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3
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SPDT
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Undervoltage
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
89mm
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17.5mm
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
1
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-20°C
+60°C
17.5 x 66.5 x 89mm
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RS Pro
Phase
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3
Phase Loss, Voltage Assemmetry
SPDT
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DIN Rail
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+60°C
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90mm
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66.5mm
Screw
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-20°C
-20 → +60°C
17.5 x 90 x 66.5mm
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RS Pro
Phase, Voltage
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3
Maximum of 280 V
SPDT
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Undervoltage
DIN Rail
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Phase Failure, Phase Sequence
100ms
48 → 63Hz
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L
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+60°C
89mm
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17.5mm
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
1
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280V
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-20°C
+60°C
17.5 x 66.5 x 89mm
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RS Pro
Voltage
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3
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DPDT
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Overvoltage Protection, Undervoltage Protection
DIN Rail
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2 → 999s
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+60°C
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36mm
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66.21mm
Screw
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-10°C
-10 → +60°C
36 x 90 x 67mm
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RS Pro
Voltage
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3
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DPDT
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Overvoltage Protection, Undervoltage Protection
DIN Rail
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2 → 999s
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+60°C
90mm
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36mm
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66.21mm
Screw
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-10°C
-10 → +60°C
36 x 90 x 67mm
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RS Pro
Phase, Voltage
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3
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SPDT
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Overvoltage Protection, Undervoltage Protection
DIN Rail
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Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
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+60°C
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45Hz
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36mm
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66.21mm
Screw
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65Hz
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-10°C
-10 → +60°C
36 x 90 x 67mm
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RS Pro
Phase
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3
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SPDT
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Overvoltage Protection, Undervoltage Protection
DIN Rail
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+60°C
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90mm
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66.5mm
Screw
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-20°C
-20 → +60°C
17.5 x 90 x 66.5mm
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