S11/13 10kV, 20kV oil-immersed distribution transformer
SUMMARY
S11, S13 series full-sealed oil-immersed transformers are suitable for power systems with AC 50Hz and rated working voltages of 20kV and below, as distribution transformers for petroleum, metallurgy, chemical, textile, light industry and other dusty places.
DETAILS
Model meaning
Features
● Iron core
The core is made of high permeability magnetic grain oriented cold rolled silicon steel sheet. The iron core is a new type of iron core, and the full oblique jointed iron core has a core section of a multi-stepped step, and the iron yoke and the iron core have equal sections.
● Winding
The winding adopts corrugated oil passage, no immersion paint process, and the tightening belt is tied; the windings are concentric coils: the high-voltage winding has taps corresponding to the tapping voltage requirements, and is led to the tap changer, the switch is mounted on the box cover, and needs to be cut off. The tap voltage can be changed after the power supply.
● Safety protection device
The 30~2000kVA transformer is equipped with a pressure relief valve;
A gas relay with an alarm and trip terminal can be installed according to user requirements;
● Oil temperature measuring device
The transformer is equipped with a tube holder of a glass thermometer, and the tube seat is arranged at the top of the oil tank and protrudes into the oil by 120±10 mm;
The 1000~2000kVA transformer is equipped with an outdoor signal thermometer;
● Transformer tank
The transformer tank is composed of corrugated walls with dust on the surface.
Spray and paint film is firm. The corrugated fins not only have a cooling function, but also have a "breathing" function. The elasticity of the corrugated fins can compensate for the change in the volume of the transformer oil caused by the temperature rise and fall. Therefore, the fully sealed transformer has no oil storage cabinet, which reduces the overall height of the transformer;
The transformer is vacuum-filled during packaging, completely removing the moisture in the transformer, and the transformer oil is not in contact with the air. Effectively prevent oxygen and moisture from intruding into the transformer, resulting in a decrease in the insulation performance of the transformer and the possibility of aging of the transformer oil, so the oil sample test is performed irregularly.
