Semi-Enveloped Dry Type Transformer

The core employs 30ZH120 high permeability cold rolling grain-oriented silicon-iron sheet and complete feed seam and is free from punched hole, this leads to the decrease of technological loss. The no-load loss decreases by 20 % or more compared with the standard value required by GB /T10228-1997.

The low-voltage coil is of foil winding structure, its layer insulation and overhang insulation adopt NOMEX insulation material. Moreover, the copper bar and copper foil of leads are shaped by VPI vacuum pressure impregnation, high temperature baking and solidification upon the overall baking of coil by the way of argon-arc welding with special equipment. Compared with SG10, SGRB10 features higher mechanical strength, less axial stress, more beautiful figure, less fabrication work-hour and is free from helix angle.

The high-voltage coil is of multi-layer cylinder type of longitudinal multi-gas passage structure, it uses NOMEX paper wrapping with oxygen-free flat copper wire for conductor and NOMEX for layer insulation, and uses grade-H molded insulation material for overhang insulation. Its surface is wrapped with multi-layer NOMEX paper, upon the overall baking, the coil is shaped through VPI vacuum pressure impregnation, high temperature baking and solidification. Comparing with SG10, it has higher mechanical strength, equivalent heat radiation effect and better dustproof capability.
The transformer body adopts square-tube clamping pieces, stainless steel drawplate press-nail structure, whereas the high voltage lead is of 10KV crosslinking cable coupling, and the whole transformer surface is coated with special water-proof material forming a dustproof, damp proof and antifouling overcoating. Compared with SG10, SGRB10 has more reliable overall stress, better humidity resistance capability and safer power utilization.

Rating:
phase:3
frequency:50HZ/60HZ
primary voltage:10kV
secondary voltage:0.4kV
tap voltage:+/-2x2.5%
vector:Yyn0/Dyn11

Characteristics:
high capacity to endure heat impulsion
high capacity of over-load
low noise
no-fired,non-inflamming,fireproofing,low partial discharge
no poisonous gas,easy maintenance,easy recycle after
life-age