HGTS 750kV/375kVA SF6 Gas Insulated Test Transformer

This industrial-grade test transformer combines 750kV ultra-high voltage with dual-frequency capability (50Hz/200Hz), delivering exceptional flexibility for high-voltage testing across multiple standards and applications.

Core Specifications

• Rated Capacity: 375kVA

• Frequency Range: 50Hz/200Hz operation

• Dual Voltage Output: 375kV/0.5A (serial) or 750kV/0.5A (parallel)

• Partial Discharge: ≤2pC @ 750kV (≤1pC @ 550kV)

• Impedance Voltage: ≤20% @ 50Hz

Dual-Frequency Operation

50Hz Mode

• Standard power frequency testing

• IEC/IEEE compliance

• Impedance voltage ≤20%

200Hz Mode

• Specialized high-frequency testing

• Reduced test time for certain applications

• Ideal for research applications

Performance Specifications

Advanced Operational Capabilities

Standard Operation

• 1 hour @ 100% rating (750kV/0.5A)

• 24-hour cooldown required

• Winding ΔT <75K

Intermediate Operation

• 120 minutes @ 550kV

• 12-hour cooldown required

• For extended partial discharge tests

Premium Insulation System

• SF6 gas insulation (maintenance-free)

• Winding-to-ground insulation >2000MΩ

• Surge arrestor protection system

• 5/5 CT current monitoring

Industrial Applications

• Ultra-HV cable testing

• GIS (Gas Insulated Switchgear) qualification

• Power transformer factory testing

• High-voltage research laboratories

• Renewable energy component testing

Technical Advantages

1. Dual-Frequency Flexibility: 50Hz/200Hz operation

2. Unmatched PD Performance: ≤2pC at full voltage

3. Extended Operation: 1-hour continuous rating

4. Safety Assurance: Integrated CT monitoring

5. Robust Design: Withstands 800kV overvoltage

Operational Guidelines

• Strictly adhere to cooling periods

• Monitor SF6 pressure before operation

• Verify CT system functionality

• Use proper HV safety protocols