Page 18

PACKING AND DESPATCH

Packing

Transformer are generally dispatched oil filled and ready for the service. Occasionally, in case of large units. It is necessary to dismantle certain fittings and pack them separately to meet the transport limitations and avoid any transit damage. In such case oil is lowered below the top tank cover and space between the oil and tank cover is filled with dry air at normal atmospheric pressure. The oil required for topping up conservator, radiators etc. is supplied separately in sealed drums.

Parts generally detached for transport are as follows :-

a) Conservator with oil gauge.

b) Detachable cooling radiators, when provided. In case of corrugation, they are fixed type.

c) Other accessories such as Buchholz relay, Explosion vent, silica gel breather, Magnetic oil gauge, Pipe connection.

INSPECTION

The transformer may get damaged during transit, hence on the receipt of unit at site, it is necessary to examine main unit and components very carefully with packing list sent with each transformer. Damages and shortages, if any, should be reported to the Kotsons Private Limited, Agra. With the photograph and other useful evidence wherever possible. Open delivery certificate should be obtained from the carriers. Particular attention should be given to the damages of :

a) Main tank

b) Protruded fittings on the tank, such as valves conservator, brackets, welded / bolts, radiators if applicable, corrugations etc.

c) Porcelain bushings : Porcelain parts and current carrying stems.

d) Accessories :

i) Magnetic oil gauge Dial glass, float and mercury switches

ii) Dial type thermometer Dial glass, pointers, capillary tube, stem, protection caps of operating keys for maximum indication pointer and contacts.

iii) Buchholz relay Winding glasses, operating floats and mercury switches.

iv) Explosion vent Glass and bakelite diaphragm for cracks and puncture

v) Marshalling / Junction boxes

Window glasses, inside instruments (if any) and cable glands.

e) Corrugated fins.