Description: The
problems of system grounding, that is, connection to ground of neutral,
of the corner of the delta, or of the midtap of one phase, are covered.
The advantages and disadvantages of grounded vs. ungrounded systems are
discussed. Information is given on how to ground the system, where the
system should be grounded, and how to select equipment for the ground of
the neutral circuits. Connecting the frames and enclosures of electric
apparatus, such as motors, switchgear, transformers, buses, cables,
conduits, building frames, and portable equipment, to a ground system is
addressed. The fundamentals of making the interconnection of a ground
conductor system between electric equipment and the ground rods, water
pipes, etc., are outlined. The problems of static electricity— how it is
generated, what processes may produce it, how it is measured, and what
should be done to prevent its generation or to drain the static charges
to earth to prevent sparking—are treated. Methods of protecting
structures against the effects of lightning are also covered. Obtaining a
low-resistance connection to earth, use of ground rods, connections to
water pipes, etc., are discussed. A separate chapter on electronic
equipment is included.
Download
No comments:
Post a Comment