Drive cabinet housing
The same precautions relating to the integration of high powered IBGT or thyris- tor controlled d.c. drives covered in Chapter 10 relate to those fitted to chassis dynamometers.
The drive and control cabinet for high power chassis dynamometers may be over 6 m long, 2.2 m high and, although only 600–800 mm deep, will require space for front and sometimes rear access. These units are heavy with high centres of gravity and vulnerable to damage through damp or dirty atmosphere; if positioned before the building is clean and heated then adequate provision for protection should be made.