MOEORW-PB260 220kV Partial Discharge-Free AC Withstand Voltage Test System Send email to us

1.Partial Discharge-Free Design: The total partial discharge level of the entire system and all core components at rated voltage is ≤10 pC, meeting the stringent requirements of transformer partial discharge testing. Electrostatic shielding is installed between windings, providing excellent resistance to electric field interference and magnetic shielding, with low spatial radiation.

2.High- and Low-Voltage Fiber-Optic Isolation: The frequency converter, voltage divider, and control cabinet communicate via fiber-optic links to isolate high- and low-voltage circuits, preventing damage to the control unit caused by breakdown flashovers and resulting overvoltages, thereby enhancing operational safety. The control and display unit features an aluminum alloy enclosure for easy on-site handling.

3.Flexible Tuning Modes: Supports both manual and automatic tuning for resonance testing, adapting to various test conditions; Reactors support individual, series, and parallel configurations without the need for stacking, accommodating a wide range of test specimen parameters.

4.Integrated Containerized Vehicle-Mounted Design: The equipment is integrated into a shipping container and equipped with a vehicle-mounted eddy current base, allowing reactors to be used directly on the vehicle without unloading; container doors are configured to open and close according to test requirements, and the unit features built-in lifting points for convenient on-site transport and hoisting, suitable for both indoor and outdoor use.

5.Multifunctional Testing Capabilities: A single unit can perform multiple tests on transformers, including partial discharge, induced withstand voltage, and series-resonant AC withstand voltage; the excitation transformer serves both excitation and electrical isolation functions, and all high-voltage bushings are equipped with equalizing rings to reduce corona interference.

6.Reliable Protection and Durability: Forced air cooling or oil-immersed natural cooling ensures the ability to operate continuously for extended periods under rated load; comprehensive protection mechanisms allow the system to adapt to complex on-site testing environments, and components have clearly defined maintenance requirements, facilitating on-site operation and maintenance.

1.Input Power: Three-phase 380 V ±10%, 50 Hz, rated input power 260 kW; Output: Single-phase 0–350 V, frequency 20–300 Hz, frequency resolution 0.1 Hz, waveform distortion rate ≤1.0%, system partial discharge ≤10 pC.
2.Environmental Conditions: Altitude ≤ 1,000 m, ambient temperature –10°C to 45°C, relative humidity ≤ 90% RH (at 20°C); the installation site must be level, with the reactor’s tilt not exceeding 5°; reliable grounding is required on-site.
3.Core Component Parameters
·Frequency-conversion power supply: Capacity 260 kW, forced air cooling, continuous full-load operation ≥180 min, fiber-optic isolated communication, ·partial discharge ≤10 pC;
·Excitation transformer: 260 kVA, 20–300 Hz, oil-immersed self-cooling, partial discharge ≤10 pC;
·Compensation reactor: Single unit 20 kV/5 A/6 H, supports series and parallel combinations;
4.Capacitive Voltage Divider: Rated 60 kV, capacitance 300 pF, measurement error ±1.0%, partial discharge ≤10 pC.
Operating Duration: Continuous operation for 180 minutes during transformer partial discharge testing; continuous operation for 90 minutes at the reactor’s rated current; insulation withstand voltage of 1.1 times the rated voltage for 1 minute.