Howard HI-102 Overhead Transformer - Manual (Page 6)

Document 2.4.95, Revision 0
May. 2013
6
Fluid-Filled Overhead Distribution Transformers
Drawings and Documents
Locate all shipping papers, packing lists,
specifications, and other pertinent information for
use during inspection. Verify that the transformer is
supplied with a nameplate, required warning labels,
and terminal designation markings. Verify that the
terminal designation markings are consistent with
those on the nameplate. The transformer nameplate
provides electrical characteristics, winding
connections, and weights. Check the nameplate for
verification of specification compliance, including
voltage and kVA ratings, percent impedance, and
other design characteristics. The transformer wiring
diagram provides details of any control, fan and
alarm wiring that may have been provided.
Lifting and Handling
Overhead transformers may be lifted by crane or
hoist. Properly palletized transformers may also be
lifted by a forklift truck. Refer to the transformer
nameplate to determine the total weight of the
assembled transformer and make sure that the
lifting equipment, hooks, cables, slings and spreader
bars are adequate to perform a safe lift. Do not use
transformer bushings as handles, otherwise undue
stress may damage the bushing and cause a fluid
leak. Be aware that cooling radiators, if present,
are made of relatively thin metal and can be easily
damaged. Special care must be taken when handling
transformers, if the ambient temperature is below
minus 20°C (minus 4°F); otherwise, permanent
damage to the transformer may result.
Lifting the transformer by crane or hoist is
accomplished using the provided lifting lugs. Do not
lift from any points other than the provided lifting
lugs. Do not use holes in the lifting lugs for lifting.
These holes are for tie-down purposes only and are
not suitable for lifting. A spreader bar should be used
to keep the lifting cables or slings nearly vertical,
enabling a safe lift and reducing the likelihood of
tank deformation or damage to painted surfaces.
Transformers should be lifted in an upright position,
allowing the transformer to tilt no more than 15
degrees from vertical. Lifting cables or straps should
be no more than 20 degrees from vertical.
A forklift truck may also be used to lift overhead
transformers that are securely mounted on a
shipping pallet. Lifting forks must be of sufficient
length to extend completely under the pallet. Do not
attempt to lift an un-palletized transformer with a
forklift truck.
▲
! WARNING
FAILURE TO FOLLOW THE INSTRUCTIONS
BELOW COULD RESULT IN DEATH OR SERIOUS
PERSONAL INJURY, AND COULD ALSO RESULT
IN DAMAGE TO THE EQUIPMENT.
• Lifting equipment, including forklift trucks,
cranes, hoists, cables, straps, lifting bolts,
hoist rings and spreader bars, must be of
adequate capacity to safely lift the completely
assembled transformer.
• Keep unnecessary personnel clear while
unloading and moving the transformer.
Initial Inspection
Although all transformers are carefully inspected and
tested at the factory, a thorough receiving inspection
should be conducted to detect any damage or loss
that might have occurred during shipment. The
receiving inspection should be completed upon
receipt and before unloading from the truck. Note
any damage or discrepancies on the bill of lading,
file a claim with the carrier, and notify the Howard
Industries Transformer Division prior to unloading the
transformer and before attempting any repair.
The following checks should be performed:
1. Read the serial number on the transformer
nameplate and make sure it matches
the serial number listed on the shipping
documents. Also, check the transformer
nameplate for kVA rating, high-voltage rating,
low-voltage rating, impedance and other
design characteristics, and make sure they
comply with the specifications.
2. Check shipping documents to make sure
the shipment is complete, including all listed
accessories and hardware. Be aware that
SECTION 2: RECEIVING, HANDLING, AND STORAGE