We have changed out incandescent lamps with two-lamp T-8 with electronic ballasts in several buildings. Now the fire alarm system keeps sounding false messages. We get nearly all messages. The fire system sensors are connected via a twisted pair and are directly addressable ("smart...
I have a 1500 ton water chiller at 480 VAC. It is an open transition wye start, delta run motor. Each of the three phases is replicated to produce six phases which are connected across the motor coils in such a way that each coil (in the run state) will have a set of conductors that brings the...
