Partial discharge tester UHVQW

automatic

Product overview
The UHVQW Series inflatable no-partial-discharge test transformer is developed for insulation withstand and partial-discharge measurement of high-voltage, large-capacity power equipment such as GIS, GIL and power transformers. The instrument supports on-site installation and testing under running conditions. High-speed AD conversion and digital signal processing with adaptive filtering provide reliable detection data and strong interference suppression.

Product parameters
Designed for dielectric withstand testing, partial discharge measurement and precision testing of high-voltage power equipment. Available in multiple output ratings to match GIS/GIL and transformer testing requirements. Suitable for laboratory and field use where inflatable insulation enables compact transport and site deployment.

Technical parameters

• Available output voltages (kV): 50, 100, 150, 200, 250, 300
• Input voltage (V): 200 or 400 (model dependent)
• Impedance voltage (%): ≤8 / ≤6 / ≤5 (model dependent)
• No-load current (%): ≤6 / ≤5 (model dependent)
• Waveform distortion: <3%
• Rated capacity: 50 kVA
• Low-voltage current: 0–116.3 A
• Low voltage range: 0–430 V
• High voltage range: 0–100 kV (models available up to 300 kV output)
• High-voltage current: 0–0.5 A
• Instrument voltage: 0–100 V
• Voltage/current meter accuracy: 0.5% FS ± 3 digits
• Overall measurement accuracy: 4%
• Timing length: 0–999.9 M (special long-term mode available)
• Supply voltage: AC 380 V ±10%; 50 Hz ±2 Hz
• Operating temperature: 0–50 °C
• Relative humidity: ≤85% RH

Features

• 10-inch LCD displays voltage, current, timing, status and prompts with clear readings
• User interface localized (Chinese) with touch operation for simple configuration and control
• Touch-based pre-setting of test sequences to increase operational safety and repeatability
• Status guidance and audible alarm for abnormal acquisition (buzzer)
• Emergency stop to halt boosting or lowering during automatic control
• Automatic timing: timing starts when voltage reaches set value; equipment steps down at end of timing
• Manual control mode with automatic upper/lower limit detection and protections (overvoltage, overcurrent)
• Hardware and software anti-interference measures for stable performance in noisy environments
• Support for single-operation or multi-unit coordinated operation

Safety precautions

• Install test site per applicable regulations; ensure control panel and transformer are grounded to the same grounding grid
• Verify power supply voltage before startup and connect power cord correctly
• Use the emergency stop when approaching the test specimen or connected equipment
• After power-on, system will return to zero position if not at zero
• Do not place unrelated items on or around the equipment panel during tests
• When replacing fuses or accessories, use the same model specified for the instrument
• Maintain the instrument moisture- and oil-proof as required
• Ensure the unit under test is de-energized and isolated from other live circuits when required

Technical specifications

• Model series: UHVQW Series
• Rated capacity: 50 kVA
• Output range: up to 300 kV (common range 0–100 kV per model)
• Input range: 200 V / 400 V depending on model
• Voltage/current meter accuracy: 0.5% FS ± 3 digits
• Overall accuracy: 4%
• Timing: 0–999.9 M; long-term mode available
• Supply: AC 380 V ±10%; 50 Hz ±2 Hz
• Operating temperature: 0–50 °C; relative humidity ≤85% RH