Separation of terminal box from motor
Separation of terminal box from motor
(OP)
This is a question to European specialists. We design for EU customer a large piece of equipment based on MV induction motor (about 4 MW power range). The motor has a side mounted terminal box which represents a huge packaging challenge. Is this permitted (as per EU standards - IEC, EN, etc.) to separate the terminal box from the MV motor? We know that here in US the NEC allows a terminal box separation from the motor for a distance not exceeding 6 ft of cable length (though for motors up to 600V).





RE: Separation of terminal box from motor
Once we ordered an IDF motor of 11 kV 4MW and I specified NEMA dimensions for the terminal box. The Manufacturer supplied the motor with his usual terminal box where was no room to connect our 2 parallel 3*240 15 kV cables and refuse to replace it, but agreed to pay the expenses for a new box. I ordered a new terminal box -as in attached sketch. The maximum distance was dictated by motor leads length only.
RE: Separation of terminal box from motor
RE: Separation of terminal box from motor
Regards,
Matt