I have recently been looking at some motor protection relay curves and noticed some curves that were set below both the the Hot and Cold locked rotor safe stall times, and other curves that were set inbetween the two points.
I have heard that setting the overload curve between the two curves somtimes helped with acheiving more starts, which in most cases is 2Cold, 1Hot start.
I was wondering typically where the relay curve should be set in relation to the two curves and if setting it between the two curves was risking damage to the motor?
I have heard that setting the overload curve between the two curves somtimes helped with acheiving more starts, which in most cases is 2Cold, 1Hot start.
I was wondering typically where the relay curve should be set in relation to the two curves and if setting it between the two curves was risking damage to the motor?