GE Industrial Solutions Seconday Substation Transformer - Manual (Page 2)

2
SHIPPING
Distribution transformers are shipped
completely sealed. Core and coils are
assembled in a tank with the insulating liquid
covering the coils.
This method of construction preserves the
quality of insulation, the cooling and
insulating liquid by preventing contamination
from external sources.
INSPECTION ON RECEIPT
When a transformer is received, a thorough
external inspection should be made before
the unit is removed from the railroad car or
truck. If there is evidence of damage and/or
indication of rough handing in transit, and
inspector representing the carrier should be
requested and the manufacturer immediately
notified.
NOTE: An internal inspection is necessary
only if internal damage is suspected because
of external indications of rough handling.
If the delivering carrier is willing to permit
internal inspection of the transformer on the
railroad car or truck prior to unloading, without
requiring consignee’s signature on the
delivery slip, a representative of the
manufacturer should be called and an internal
inspection made as outlined in “Internal
Inspection”.
If the delivering carrier will not permit internal
inspection of the transformer on the railroad
car or truck, note on the acceptance slip for
the shipment that there are “possible internal
and/or hidden damages”, and file a claim
immediately for possible hidden damage.
When the transformer has been removed to
the installation site or some other convenient
location to permit inspection of the internal
assembly for damage in transit, proceed as
outlined in “Internal inspection”. Request that
a representative of the carrier be present
during the inspection.
HANDLING
A. COMPLETE TRANSFORMER
The transformer should always be handled in
the normal upright position unless information
from the manufacturer indicates that it can be
handled otherwise. Where a transformer
cannot be handled by a crane, it may be
skidded or moved on rollers into place,
depending upon compatibility of transformer
base design and the type of surface over
which it is to be moved. During the handling
operation, care must be taken to prevent
overturning.
When a transformer is shipped it is usually
ready to be set in place after the crating and
shipping braces are removed. Bushings and
accessories which are shipped separately
should be thoroughly protected against
moisture until they are installed. Proper
precaution must be taken during installation
of these parts to protect the transformer
against moisture.
B. LIFTING WITH SLINGS
Lifting lugs and eyes are designed to be lifted
with a maximum sling angle of 30° from the
vertical. For lift angles of greater than 30°
from the vertical, spreader bars must be used
to provide a vertical lift on the lugs.
C. RAISING WITH JACKS
Jack bosses are provided on most
transformers so that the transformer can be
raised by means of jacks. On those
transformers not equipped with bosses, the
jacks may be placed under the transformer
bottom plate at designated points. The
manufacturer’s drawings should be consulted.
Do not attempt to raise the transformer by
placing the jacks under drain valves, pipe
connections or other attachments. It is also
recommended that these appendages are not
subjected to a man’s weight.
INTERNAL INSPECTION
WARNING: Avoid any accident. Be sure to
relieve tank pressure or vacuum before