Resonant test system UHV-300kVA/100kV

for electrical machines and installationsfor cablescompact

Product Overview
The complete set of Variable Frequency Series Resonant Test Equipment is primarily used for AC withstand voltage testing of cross-linked cables, hydraulic generators, main transformers, busbars, GIS, and more. With a wide range of applications, it is an ideal withstand voltage testing solution for local, municipal, and county-level high-voltage test departments, as well as power installation, repair, and commissioning engineering units.
The Variable Frequency Series Resonant Test System mainly consists of a variable frequency control power supply, an excitation transformer, a reactor, a capacitive voltage divider, and an optional compensation capacitor.

Technical parameter

• Rated output voltage: 01000kV and below
• output frequency: 30300Hz
• Resonance voltage waveform: Pure sine wave, waveform distortion rate≤1.0%
• Working time: Full power continuous working time of 60min
• Quality factor: 30~90
• Frequency regulation sensitivity: 0.1Hz
• Instability:
• Working power supply: Single-phase 220V or three-phase 380V±10%
• Power frequency: 50Hz±5%

Product Characteristics

• Reactor Design: The reactor features a smaller volume and lighter weight compared to conventional units of the same voltage rating and capacity. It exhibits low temperature rise under rated load. With dry-type casting, it offers high mechanical strength, excellent electrical insulation, and a reliable, aesthetically pleasing appearance.
• Variable Frequency Control Power Supply: The variable frequency control power box offers a large capacity margin, robust protection functions, good output waveform, and excellent stability. It supports multiple operating modes for ease of use and is compatible with both single-phase 220V and three-phase 380V input power supplies, facilitating convenient on-site power connection.
• Flexible Configuration: The resonant test system supports various types of reactors to meet the testing requirements of different applications, enabling multi-purpose use and delivering high cost-effectiveness.

Composition of Variable Frequency Series Resonant Test Equipment

• The frequency conversion series resonant device mainly consists of the following components:
• 1. Variable frequency power supply: It is the core part of the device that converts a fixed frequency and voltage power supply (such as 220V/380V, 50Hz) into a sine wave AC power supply with adjustable frequency and voltage.
• 2. Excitation transformer: boosts the voltage output from the variable frequency power supply while isolating high and low voltage.
• 3. High voltage reactor: forms a series resonant circuit with the tested capacitor.
• 4. Voltage divider: used to measure the high voltage value on the test sample and transmit the measurement signal to the host for display and control.

Inspection and maintenance of Variable Frequency Series Resonant Test Equipment

• Appearance inspection: Recheck the appearance of each component of the testing device to see if there is any damage or abnormal condition. If there is any damage, it should be repaired or replaced in a timely manner.
• Cleaning and maintenance: Clean and maintain the testing device to remove dust and dirt from the surface of the equipment. Regularly maintain the equipment, such as checking for loose electrical connections, lubricating moving parts, etc., to ensure the performance and reliability of the equipment.