Howard Medium Power Substation - Manual (Page 7)

Medium Power Substation Transformers
Document 2.4.06, Revision 4
June 2013
7
lifting
lifting hooks are provided near the top of the
transformer tank for lifting. All four lifting hooks must be
used simultaneously. The transformer must not be lifted
from any points other than the provided lifting hooks. It
is recommended that spreader bars be used to keep
the lifting cables nearly vertical, reducing the likelihood
of tank deformation or damage to painted surfaces.
Transformers should be lifted in an upright position,
allowing no more than 15 degrees of tilt from vertical.
Jacking, Skidding, and Rolling
Jacking pads are provided at all four corners of the
transformer base for use in jacking. Do not use cooling
fins or pipes, valves, or sheet metal surfaces for jacking.
Jacking must be done from two adjacent corners
simultaneously to prevent warping of the tank bottom.
When rolling, use an adequate number of rollers to
distribute the transformer’s weight evenly. Refer to the
transformer outline drawing for the location of jacking
pads on the transformer tank.
HANDlINg