Howard Medium Power Substation - Manual (Page 4)

Document 2.4.06, Revision 4
June 2013 Medium Power Substation Transformers
RECEIvINg INSPECTION
These instructions apply to medium power transformers
manufactured by Howard Industries. It is important to
read the safety information on Page 2 before attempting
any installation, operation, or maintenance activities.
Although all transformers, components, and accessories
are carefully inspected and tested prior to shipment,
a thorough receiving inspection should be conducted
to detect any damage or loss that might have occurred
during shipment. The receiving inspection should be
done upon receipt and before unloading from the truck
or rail car. Note any damage or discrepancies on the
bill of lading and file a claim with the carrier, and notify
the Howard Substation Transformer Division prior to
unloading the transformer.
Impact Recorder
Impact recorders are provided on all rail shipments
and on some truck shipments. An impact recorder is
a mechanical recording accelerometer that can record
shock and impact from all directions. The impact
recorder records on pressure sensitive chart paper each
impact that has occurred, its magnitude, direction, and
time of occurrence. These impacts are recorded through
three independently operating styli in each of three
separate axes: longitudinal, lateral, and vertical.
The impact recorder should be checked for evidence
of possible damage to the transformer due to impacts
during shipment. This check should be performed prior
to unloading the transformer. A representative of the
shipper should be present when the recorder is checked.
Any evidence of damage should be noted on the bill of
lading and signed by the shipper’s representative before
the transformer is accepted. Consult with the Howard
Substation Transformer Division if shipping damage is
found or suspected.
Refer to the operating manual accompanying the impact
recorder for instructions explaining how to turn off the
recorder and to interpret the chart. If it appears the
chart recorder stopped running before arrival at the final
destination, the shutdown time should be noted and this
fact should be brought to the attention of the shipper
representative and to the Howard Industries Substation
Transformer Division.
Impacts in any axis of less than 4 G’s are considered
acceptable. Impacts in any axis of 4 G’s or greater
indicate rough handling that could potentially have
caused damage to the equipment. If rough handling
is indicated, this fact should be noted on the shipping
documents and brought to the attention of the shipper
representative and the Howard Industries Substation
Transformer Division before proceeding with inspection
of the transformer.
Drawings and Documents
locate all shipping papers, packing lists, outline
drawings, and other pertinent information. Use these
documents and this instruction manual during the
inspection.
The transformer outline drawing indicates the locations
of nameplates and warning labels, and provides physical
dimensions and weights. The nameplate provides
electrical characteristics, winding connections, and
weights. The wiring diagram provides details of control,
fan and alarm wiring.
DO NOT REMOvE OR OBSCURE ANY WARNING lABElS
OR NAMEPlATES.
External Inspection
The following external inspections should be made at a
minimum.
1. Ensure that all equipment, accessories, and
components listed on the bill of lading are
present.
2. Ensure that there are no signs of external
damage.
3. Ensure that the paint finish has not been
damaged.
4. Ensure that fittings, conduit, wiring, and other
attachments are tight and undamaged.
5. Check for evidence of fluid leakage on the tank,
valves, or cooling assemblies.
6. Check for damage to bushings.
7. Check for damage to shipping crates, packages,
or other materials shipped separately from the
transformer.
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