Gas-Insulated Tank Type PD-Free Power Frequency Tester

MOEORW-WPi60 tank-type SF6 gas insulated power frequency partial discharge-free test device (GTU series gas-insulated test transformer system, also matching MEXB-132kVA/66kV variable frequency resonance withstand voltage complete set) is a dedicated high-voltage test equipment developed for factory offline testing and on-site inspection of metal-enclosed power equipment.

The core component GTU non-partial discharge test transformer is fully sealed inside an SF6 gas insulated metal tank. All high-voltage components are enclosed in a closed gas chamber, with built-in capacitive high voltage divider and coupling capacitor. The system supports partial discharge test and power frequency withstand voltage test simultaneously. After installing an external SF6 high voltage bushing, it can also carry out withstand voltage tests on conventional power equipment.

The whole system complies with ISO9001 quality system, national electrical standards and VDE0104 safety specification. It is equipped with digital integrated control console, compensation reactor, isolation transformer and voltage regulator, realizing automatic pressure regulation, timing withstand test and multi-protection interlock functions. It can realize multi-channel test interface switching through built-in high-voltage isolating switch, and can be made into fixed workshop type or vehicle-mounted mobile test system.

Core GTU Non-Partial Discharge Test Transformer

ZST Column Voltage Regulator

GLB Power Isolation Transformer

Capacity matches the voltage regulator; main function is to filter power grid interference and control partial discharge background ≤1Pc.

BCL Compensation Reactor

High Voltage Measuring System

1.Built-in capacitive high voltage divider: ratio 10000:1, capacitance 50pF, measurement accuracy ±1% (10%–100% rated voltage), partial discharge ≤1.5Pc at rated voltage
2.Coupling capacitor: capacitance 100pF, partial discharge ≤1.5Pc at rated voltage, SF6 tank sealed structure

SF6 High Voltage Bushing

Universal Adjustment Docking Platform

Working Environment

• Ambient temperature: -10℃ ~ 40℃
• Grounding resistance: ≤0.5Ω
• Power supply waveform distortion ≤3%
• No limit on altitude and air humidity for high voltage tank part

Structural Advantages
1.Compact size & light overall weight, integrated frame design for convenient long-distance transportation
2.All high-voltage components fully sealed in SF6 metal tank, zero exposed live parts, guarantee operator safety
3.Built-in high voltage divider, coupling capacitor, partial discharge standard injection port, multi-channel high voltage isolating switch
4.Direct flange connection with GIS test pieces, equipped with universal docking platform for easy alignment

Test Performance Advantages
1.Ultra-low partial discharge background: the system can be adjusted to background ≤1Pc, meets high-precision PD test requirements
2.Equipped with compensation reactor to compensate capacitive current of test object, greatly reduce power supply capacity demand
3.Multi-scenario compatible: install SF6 bushing to realize conventional power equipment withstand voltage test; multi-test interfaces support simultaneous switching of multiple test pieces
4.Three-phase conversion switch optional, convenient for three-phase coaxial GIS equipment test

Control & Safety Features
1.Digital integrated control console with large screen system diagram visualization operation
2.Zero-voltage interlock startup, 3 adjustable boosting speeds, preset voltage and withstand time, automatic step-down & power-off after timing ends
3.Complete multi-protection: overvoltage, overcurrent, SF6 gas chamber overpressure/undervoltage, over-temperature automatic shutdown
4.Independent gas pressure & temperature real-time monitoring for each SF6 tank, remote monitoring via console
5.Comply with ISO9001, national standards and VDE0104, minimal damage to equipment under fault state

Expandable Configuration
Rich optional modules: partial discharge tester, three-phase conversion switch, insulator test tank, peak voltmeter, vehicle-mounted mobile chassis, standard voltage transformer for PT test

Factory Routine Offline Test
1.GIS metal-enclosed combined electrical equipment factory withstand voltage & partial discharge test
2.GIS components test: disc insulator, insulating structural parts, voltage/current transformers
3.High voltage power cable factory partial discharge and power frequency withstand voltage test
4.Single/three-phase voltage transformer special inspection (support multi-test interface system with 6 test ports)
 

On-site Power Grid Inspection
1.Mobile vehicle-mounted system for on-site GIS equipment partial discharge diagnosis
2.After-installation withstand voltage test of high voltage cable and GIS on substation site
3.Routine inspection of power transformer, lightning arrester and other conventional HV equipment (with SF6 bushing)
 

Third-party High Voltage Laboratory
Professional partial discharge test platform for power equipment detection institutions, supporting continuous long-time withstand voltage test and high-sensitivity PD detection

Standard Delivery Modules
1.Core GTU SF6 insulated non-partial discharge test transformer tank
2.ZST column voltage regulator + GLB isolation transformer + BCL compensation reactor integrated frame
3.Built-in capacitive high voltage divider & SF6 sealed coupling capacitor
4.Digital operation control console with complete monitoring & protection functions
5.Basic single-channel test flange interface, SF6 inflation/vacuum quick connector, pressure gauge, pressure relief valve, temperature & pressure sensors
6.Main connecting pipelines, grounding copper bar, operation tools
 

Optional Expansion Modules
1.Measuring equipment: partial discharge tester, peak voltmeter, partial discharge standard injection port
2.Test connection accessories: SF6 high voltage bushing, multi-channel isolating switch, three-phase conversion switch, insulator test tank
3.Auxiliary platform: universal adjustment docking platform for GIS switch
4.Special test parts: standard voltage transformer (for PT test system)
5.Mobile solution: vehicle-mounted integrated chassis, overall transportation bracket
 

Non-included Supplies
SF6 gas recycling treatment equipment, SF6 insulating gas (purchased separately by customer)