Low-voltage Exciting Transformers

Applications：

Low voltage exciting transformer is mainly used in hydropower low-voltage excitation system. It provides three-phase AC excitation power supply for generator. The excitation system converts the three-phase power into generator rotor DC power through silicon-controlled rectifier, and form generator excitation magnetic field. The trigger angle of silicon-controlled rectifier is adjusted through excitation system for reactive power and to adjust terminal voltage of electric machinery.

Features：

●Vacuum Pressure impregnation (V.P.I) is used to enhance insulation property;

●Silicon steel of high permeability is exploited, Low no-load losses, Small no-load current, less noise;

●High operational efficiency, strong overload capacity;

●Effectively suppress the harmonic wave;

●Superior protection against humidity, can operate in high humidity environment;

●Low temperature rise; can operate at high ambient temperature.

Technical Specifications：

●Standards: GB, IEC

●Type: ZSG

●Capacity: 15～200KVA

●Rated Primary Voltage: 400V

●Rated Secondary Voltage: Based on excitation voltage

●Frequency: 50Hz

●Number Of Phase: Three phase

●Transformer Connection Section: Dy11/Yd11

●Insulation Class: Above class F

●Dielectric Strength: 3500V/1min

●Impedance: 4%～6%