66kV Oil-Immersed Transformer Three-phase Dual-winding Voltage

Regulating Power Transformer without Excitation

Product Introduction

220kv,110kv and 66kv low loss series transformer if our independently developed new generation of

transformer on the basis of absorption of domestic and foreign advanced technology,which features

low local discharge ,low loss,low noise,high reliability ,strong protection against abrupt short circuit,its

excellent performence has been recognized ny wide users and high appeaised by experts.the full sealed

suspending cover free product sell well nationwide.

Amount of local discharge :the apparent discharge amount under 1.5 times if rated voltage is less than 80pc.

Noise:product of 63mva and below is lower than 58db(an)

Power loss:no-load loss is 30% lower than that of IEC stanard.

Reliability:all in service product have no damage or oil leakage occurred;

Short circuit withstanding :model SFZ11-50000/132 smoothly passed the short circuit withstanding test of

the national transformer quality supervision and inspection center and also passed holland KEMA quality

control systom.

Structure

1,Iron core
1. The iron core adopts cold-rolled crystal-oriented silicon steel plate 30Z140 with high quality,

low-loss, and notime effect, sheared by Geroge line and with no burr. 1.2 Iron core adopts pulling

board structure, the upperand down yoke is clamped by board, to form the frame structure. The

iron core adopts advanced laminationprocess, which effectively controls the no-load loss and

electro-magnetic noise.
2 Winding
2.1 Winding adopts mature structure, which ensure the reliability of transformer operation.
2.2 The insulation power field intensity between turns shall be controlled no greater than 1.6kV/mm.

3,Body
3.1 Body adopts mature insulation structure, and strictly guarantee the main axial insulation margin.
3.2 Body mostly adopt multi-coil whole assembly, processed in constant voltage and evaporation, which made
coil shrink evenly and with less rebounce, and enhance the electric strength and mechanical strength.
3.3 Adopt laminating wood board or thermal shaped insulation cardboard. Pressed tightly with pin, which ensure
the winding is constantly pressed tightly.