Secondary Cables For Slip Ring Connections; Auxiliary Terminal Box - ABB AMA Series Manual

***Following note for protection type: All hazardous areas
***Following paragraph for rotor type: Permanent magnet rotor
***Following paragraph for rotor type: Slip rings

4.3.7 Secondary cables for slip ring connections

4.3.8 Auxiliary terminal box

***Following note for protection type: All machines for hazardous areas
3BFP 000 050 R0101 REV E
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.
NOTE: Permanent magnet synchronous machines must be cabled by using shielded
symmetrical cables and cable glands providing 360° bonding (also called EMC
glands).
The slip ring housing at the non-drive end of the machine serves as a terminal box for the
secondary cables, and it has the same degree of protection as the machine.
The cables can be connected from either side. The connection is made to the rotor terminals on
the termination plate, which is designed to fit up to six cable lugs per phase. The terminals are
marked K, L and M in accordance with IEC Publications 60034-8.
NOTE: Study the connection diagram delivered with the machine carefully before connecting
any cables.
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 Induction Motors and Generators
Mechanical and Electrical Connections - 41