Composition of RDYDTW-30kVA/100kV Complete Set
| No. | Equipment Name | Model / Specification | Quantity |
|---|---|---|---|
| 1 | Power Frequency Partial Discharge-Free Test Transformer | RDYDTW-30kVA/100kV | 1 set |
| 2 | Isolation Transformer | GLB-30/0.38/0.38 | 1 set |
| 3 | Column Voltage Regulator | TEDGC-30/0.38/0～0.42 | 1 set |
| 4 | Capacitive Voltage Divider & Coupling Capacitor | TAWF-100/400 | 1 set |
| 5 | Power Frequency Protective Resistor | GR100-0.3/5 | 1 piece |
| 6 | Control Unit | AC-2020 | 1 set |
| 7 | Noise Filter | LBQ-30/0.4 | 1 set |
| 8 | Triple Frequency Generator | SBP-30/0.38/0.4 | 1 set |
| 9 | Partial Discharge Detector | — | 1 set |
| 10 | Cables and Accessories | — | 1 set |
Set Features
The test system is illustrated in the circuit diagram below. It consists mainly of a partial discharge-free test transformer (B1), a voltage regulator (TY), a protective resistor (R), and a capacitive voltage divider (C1, C2). Together, these components provide stable voltage regulation and ensure precise partial discharge measurement.
High-voltage low-current transformers are built with thick insulation to handle high voltage levels, while heat generated by winding losses is more difficult to dissipate. To enhance performance and reduce load losses, the current density of the winding conductors is kept below 2.2 A/mm².
The high-voltage winding adopts a cylindrical “pagoda” structure, which helps maintain mechanical stability after vacuum drying and discharge testing. The iron core is designed with low magnetic flux density (below 1.5 T) to minimize waveform distortion. It is manufactured using high-quality grain-oriented silicon steel with precise lamination and epoxy reinforcement for improved structural strength.
The transformer adopts a fully insulated enclosure structure, using high-density insulating cylinders that provide excellent moisture resistance and low leakage current. It is filled with No.25 transformer oil and sealed with high-performance fluororubber gaskets, which offer strong resistance to wear, heat, and electrical stress.
All raw materials undergo strict inspection before production. Copper conductors are controlled to ensure consistent resistance, while winding parameters such as turns, conductor diameter, insulation paper, and dimensional accuracy are strictly managed to guarantee stable performance and long-term reliability.
