Partial discharge tester YDQW series

Overview
SF6 gas is used as the insulation medium, providing high dielectric strength and a rated local discharge capacity ≤ 5PC. The series is compact, lightweight and designed for laboratory and production high-voltage testing, with technical indicators compliant with JB3570-98.

Application
Intended for manufacturers and testing facilities to perform partial discharge and power-frequency withstand voltage tests:

• Manufacturers of electrical appliances, cables, motors, transformers and mutual inductors
• Producers of insulation materials and high-voltage components
• High-voltage test laboratories in utilities, research centers and universities

Technical parameters

• Models and matching KVA: YDQW-2 — 1.5 kVA; YDQW-3 — 3 kVA; YDQW-5 — 5 kVA; YDQW-10 — 10 kVA; YDQW-20 — 20 kVA; YDQW-30 — 30 kVA; YDQW-50 — 50 kVA
• Rated voltage local discharge capacity: ≤ 5PC
• No-load current: 4–9% (depends on transformer voltage level)
• Impedance voltage: 4–10%
• Standards: complies with JB3570-98
• Control functions: overcurrent automatic tripping, zero-position interlock, autotransformer regulation
• Customization: configurations available on request

Features

• New design and manufacturing process resulting in reduced size and weight while meeting required technical indicators
• Dielectric insulation material and process engineered to prevent partial discharge during testing

Working principle
The input voltage is regulated by an autotransformer and fed into a non-partial-discharge filter isolation transformer. The control panel provides overcurrent automatic tripping and a zero-position interlock to prevent sudden pressurization. The high-voltage secondary winding generates the required power-frequency test voltage by electromagnetic induction based on the turns ratio relative to the primary winding.