Dry Type Transformers

Listing ID #981949

We offer Dry type transformer are non-explosive fire resistant, air insulated, and are cooled by natural circulation of air through ducts provide in the windings. High temperature and high dielectric insulating materials like glass fiber reinforced, nomex insulating tapes are used in such a way that the entire assembly is capable of withstanding high electrical and mechanical stresses with good dissipation of heat causing low temperature rise within the prescribed limit of insulation class. Standard The Dry Type transformer are manufactured to comply with National International Standards BIS, IS 11171, IEC 76. Description The winding are made up of electrolytic Grade, Soft and bright annealed copper conductors covered with nomex insulating tapes. The wound coils are preheating and impregnated with silicon varnish under vacuum pressure and undergo a curing cycle. The low voltage coils are wound over glass fiber reinforced cylinder having high mechanical strength. The high voltage coils are supported over yoke on glazed porcelain or resin insulators. The core is made of CRGO silicon steel laminations duly annealed after shearing and assembled in mitred construction for low â��NO LOADâ�� LOSS. The yoke frame has adjustable pressure plates to clamp & secure the coils adequately. Lifting arrangements is provide on the top yoke frame so that the core and coil assembly is lifted. OFF-CIRCUIT TAMPING if required are provided on HV winding and terminated on fiber glass terminal board for changing the transformer ratio in â��OFF CKTâ�� position. Applications Fire safety and environmental aspects are of increasing importance especially in respect of energy supply. The substitution of oil-filled transformers by dry type transformers is one of the most important step towards it. Dry Type transformer is used when it has to be located near load center and in a fire hazardous place. As there is no oil used in the transformer and special type of fire resistant insulation are used for the windings the fire risk is considerably reduced. TOP Standard Specifications Capacity Up to 2500 KVA No. Of Phases 3 Phase Frequency 50 Hz. Voltage Range 11 KV Tapping On Load Tap Changer to provide +5% to -15% Taps in steps of 1.25% on the H.T. Side. Else, Off Circuit Tap Links for ± 5% Taps on H.T. Side in steps of 2.5% each. Insulation Class 'F' (for Dry Type Trf.) Vector Group Dyn 11 Duty Cycle Continuous Winding Copper Wound Terminals As per required. Dry type Transformers has the following advantage More efficient Non toxic Highly safe Non flammable Space saving by placing near the load end Low Noise Low Maintenance Can be supplied with off circuit links.