protection for metering pump motor_40Watt, 240V, 1-phase
protection for metering pump motor_40Watt, 240V, 1-phase
(OP)
The pump is part of water treatment system in the power plant. Could some one please tell me,
Is it necessary to provide protection (other than short circuit protection accorded by fuses) for such a small motor.
What are the options available.
and
what is the industry practice.
Thanks in anticipation.
Is it necessary to provide protection (other than short circuit protection accorded by fuses) for such a small motor.
What are the options available.
and
what is the industry practice.
Thanks in anticipation.





RE: protection for metering pump motor_40Watt, 240V, 1-phase
Regards
Sean
RE: protection for metering pump motor_40Watt, 240V, 1-phase
You are right the motor is to be controlled from PLC and I agree the cost of bi-metal OL relay would not be much.
But availability of OL relay for such small current rating appears to be a problem with some of the vendors.
Any comment.
Thanks once again for the response and I appreciate if you could quote any projects / practice for reference.
RE: protection for metering pump motor_40Watt, 240V, 1-phase
Alternatively you could consider using a din rail mounted single phase VSD, speed control is sometimes a useful facility for metering pumps. So as well as speed control you would get overload protection and a means to interface with your control system. This is the solution I have seen mostly in my experience.