Regarding the distance between the motor remote start/stop cabinet room and the power distribution room
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There is a renovation project in which the existing pump set is to be equipped with remote start/stop functionality. The cabinet room where the pumps are located is more than 500 meters away from the power distribution room. Since the control cables for start/stop operations run from the contactors in the power distribution room to the corresponding connectors in the cabinet room, does this distance require consideration of voltage drop in the control cables? The voltage of the control circuit is 220V. Could there be a voltage drop due to excessive distance, resulting in the contactor coil failing to engage? I would appreciate it if experts could help answer this question. Thank you.
Calculate it and check the coil resistance of the contactor, the circuit resistance, as well as the voltage division It’s not possible to have too many connected wires; generally, when the length exceeds 300 meters, this needs to be taken into consideration
We once conducted an experiment, and it turned out that increasing the cross-sectional area can be effective. However, it is recommended that you conduct an experiment directly with the cable you intend to use, as this will be more informative.
Using a 2.5 gauge for the control cable should be fine,,,
A distance of 2 kilometers, stopping is no problem. The control cable is 2.5 square millimeters
Stopping is no problem; it’s just a matter of cutting off the control power supply. The key issue is that when starting up, the contactor coil needs to be energized, and this isn’t always guaranteed.