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6/2011
RECEIVING
Upon receipt of the transformer, inspect as follows:
1. Review the shipping papers to ensure the shipment is complete.
List any noticeable damage on the receiving papers, file a
claim with the carrier at once, and notify the
nearest transformer representative.
2. Inspect the transformer for any obvious external damage that
may have occurred during shipment, including any evidence that
water or other contaminants have entered the transformer
during transit. The transformer should arrive from the factory
covered by a tarp. An internal inspection of the enclosure is not
usually required unless possible external damage has been
observed. If an internal inspection is required, carefully inspect
the leads, bolted mechanical and electrical joints, the core and
coils, and accessory equipment such as fans, controls, heater
strips, control power transformers, or current transformers.
3. Tighten any parts, which may have worked loose during
shipment.
4. Accumulated dirt or dust should be wiped off inside and outside
surfaces and any visible dirt or dust on the windings or in the air
ducts should be removed as explained under “Maintenance”.
5. Remove shipping braces from the unit. (Shipping braces will be
tagged to indicate they are for shipping only)
6. Do not leave the installation manual or any other foreign objects
inside transformer enclosure.
HANDLING
The transformer case and base are designed to allow the unit to be
moved by lifting, skidding, or jacking.
NOTE: In the event the transformer is supplied with Super Waffle
pads and/or springs and snubber plates please refer to our separate
instructions ESP-660 & ESP-661 respectively.
1. Lifting can be accomplished by the following means:
a) The preferable method for moving the complete transformer
assembly is by forklift truck under the base assembly.
b) To lift the entire transformer using jack pads, add properly
sized eye bolts to the jack pads and lift vertically using four
cables. Each cable angle with respect to the vertical must
not exceed 30°. If this limit cannot be met or if there is
danger of damaging the transformer during lifting, suitable
spreader bars should be used. Check to make sure no
cables are putting pressure on the transformer panels.
Note: If the transformer has an outdoor enclosure, then it is
advisable to remove the front and back panels to avoid eye
bolts hitting the louvers.
c) To lift the entire transformer from overhead, remove the top
cover and use the lifting eyes or lugs provided on the top of
the core and coil structure. Lift vertically using four cables.
Each cable angle with respect to the vertical must not
exceed 30°. If this limit cannot be met or if there is danger
of damaging the transformer during lifting, suitable spreader
bars should be used. Check to make sure no cables
are putting pressure on the termination bus.
d) To remove the core and coil assembly from the case,
remove the bolts holding the core and coil assembly to the
base assembly. Remove any other case panels or
parts that will prevent the core and coil assembly
from being removed from the case. All high voltage
and low voltage line connections must be removed
and any accessory wiring disconnected. If a winding
temperature indicator or electronic temperature monitor
is present, the temperature sensing bulbs must be
removed from the tubular wells on the transformer
coils. Raise the core and coil assembly about 12
inches from the base. Use a forklift under the core and
coil assembly to move it out t hrough the front or rear
opening of the case. The unit can be moved in either
direction by using rollers under the base.
2. Pulling eyes are incorporated in the bolted on jacking pads for
use when skidding as well as when using rollers on horizontal
surfaces.
3. The unit can be jacked under the jacking pads located on the
front and back of the unit.
4. The transformer, complete with its enclosure, may be moved
without disturbing high voltage and low voltage equipment.
To do this, open the high voltage and low voltage bolted line
connections, remove all the bolts that attach the high voltage
and low voltage equipment enclosures to the transformer
enclosure, remove external ground connections to the
transformer ground pads, and remove any conduit
connections. With all these connections open it will be
possible to move the transformer in a direction at 90°
with respect to the long axis of the substation.
VIBRATION ISOLATION PADS
Rubber vibration isolation pads are an integral part of
the transformer and are placed between the core and coil
assembly and the transformer base to minimize vibration and
noise. The bolts used to secure the pads are over tightened at
the factory to reduce possibility of damage during shipping.
Before operating transformer, each bolt securing the vibration
pads should be loosened one full turn to reduce
transformer noise during operation.
NOTE: IN SEISMIC 4 LOCATIONS IT IS BEST TO KEEP THIS
BOLT FULLY TIGHTENED.
STORING
If storage becomes necessary, the transformer should be placed in
a clean, dry room in which a uniform temperature is
maintained. Air circulation through the transformer enclosure
should be permitted. The relative humidity to which the
insulating materials are exposed should be kept as low as
practical. The floor on which the transformer is stored should
be impervious to the upward migration of water vapor.
Precautions should be taken to guard against entrance of water
from any source such as roof leaks, broken water or steam
lines, windows, etc.
Electric resistance heaters should be used inside the enclosure in
cases where the relative humidity during storage is either high or
unknown. These heaters should be located under the windings on
both sides of the core. If heaters are used, air circulation through
the enclosure must be permitted. Generic furnace filters may be
mounted temporarily over the inlet and ventilation openings to
minimize dust accumulation within the enclosure. These
filters must be removed before the transformer is put in service.
Before placing the unit in service, check for dryness as
outlined under “Operation”.
MIT100-15A
