The core insulation between the
aged deterioration of insulation aging <br> <br> silicon, or the clamping
Bolt iron core casing damage, so that the core have a great vortex, the temperature rise caused by heat generation, will accelerate the insulating Aging.
Transformer core should be tested regularly dielectric strength (test method and requirements for the same coil), found that dielectric strength lower than the standard, to be replaced on the core bolt or bushing insulate.
A connection point between <br> <br>
bad wire coil terminals inside the coil and lead to high, the low pressure of the porcelain bushing contacts and the contacts of the tap, such as poor contact will produce local overheating, coil insulation damage, A short circuit or open circuit occurred.
. Poor oily, too little oil <br> <br> transformer insulating oil after the water accidentally, oil and other impurities or other mixed with oil during storage, transport or operation and maintenance, will significantly reduce the dielectric strength . A short circuit occurs when the dielectric strength drops to a certain value. Thus a longer standing time put into operation before the insulating oil must be carried out tests, such as moisture, impurities, viscosity, breakdown strength, dielectric loss angle, permittivity other items. During operation, the oil quality should also be tested regularly. When problems are found, appropriate measures should be taken in time.
Shim Washer
Washers are generally flat metal rings used to protect the surface of the connected parts from being scratched by the nuts, dispersing the pressure of the nuts on the connected parts. The gasket is a mechanical seal between two objects, which is usually used to prevent the impact of pressure, corrosion and pipeline natural thermal expansion and contraction leakage between two objects. The materials of rubber gaskets usually include Nitrile rubber, styrene butadiene rubber, hydrogenated Nitrile rubber, EPDM, silica gel, fluorine rubber, neoprene, perfluorocarbon, etc. Gaskets are usually made of sheet materials, such as pad paper, rubber, silicone rubber, metal, cork, felt, Neoprene, Nitrile rubber, glass fiber or plastic polymer.
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