Main Power Cables; Auxiliary Terminal Box - ABB AMA Manual

4.2.6 Main power cables

4.2.7 Auxiliary terminal box

3BFP 000 063 R0101 REV D
the shortest distance through air between two points with different electrical potential (voltage).
The surface creepage distance is the shortest distance along surfaces next to each other between
two points with different electrical potential (voltage).
The size of the input cables has to be adequate for the maximum load current and in accordance
with local standards. The cable terminals have to be of appropriate type and of correct size. The
connection to all devices has to be checked.
The main power cable connections should be tightened correctly to ensure reliable operation.
For details, see Appendix Typical main power cable connections.
NOTE: For Ex-machines, cable glands or cable bushings for supply cables must be Ex
certified. Glands or bushings are not included in the manufacturer's delivery.
NOTE: Prior to installation work, it is important to check that the incoming cables are
separated from the supply network, and that the cables are connected to protective
earth.
The stator terminals are marked with letters U, V and W according to IEC 60034-8 or T1, T2,
and T3 according to NEMA MG-1. The neutral terminal is marked with N (IEC) or with T0
(NEMA). Stripping, splicing and insulating of the high-voltage cables must be performed in
accordance with instructions by the cable manufacturer.
The cables must be supported so that no stress is applied to the bus bars in the terminal box.
NOTE: Check the phase sequence from the connection diagram.
Auxiliary terminal boxes are attached to the frame of the machine according to accessories and
customer needs, and their positions are shown on the dimensional drawing of the machine.
The auxiliary terminal boxes are equipped with terminal blocks and cable glands, see
Figure 4-1 Typical auxiliary terminal box. The maximum size of the conductors is normally
limited to 2.5 mm² (0.004 sq. in.), and the voltage is limited to 750 V. The cable glands are
suitable for cables of 10 – 16 mm (0.4"– 0.6") diameter.
NOTE: For Ex-machines, cable glands or cable bushings for supply cables must be Ex
certified. Glands or bushings are not included in manufacturer's delivery.
Manual for High Voltage Process Performance Motors
Mechanical and Electrical Connections - 33