Certified Instrument for Power Equipment Testing

The LQHVF 300kV/500pF meets stringent international and Chinese standards including IEC 358, GB50150, and DL/T specifications. Engineered for power equipment commissioning and maintenance, this dual-function solution provides:

• Full compliance with hand-over test requirements (GB50150-2006)

• Precision measurement for resonance testing (DL/T 849.6-2004)

• Preventive test capability per DL/T596-1996

• Dual functionality as voltage divider and coupling capacitor

Industry-Leading Stability

Temperature coefficient of 5×10⁻⁵ %/°C ensures consistent performance across environmental variations per IEC 358 requirements.

Technical Specifications

Insulation Levels

HV Arm

330kV/1min

110% rated voltage

LV Arm

3kV/1min

IEC 358 Clause 5.3

Compliance with Industry Standards

GB50150-2006

Hand-over Test of Electric Equipment Installation Engineering

• Sec 10.3: HV test requirements

• Annex B: Measurement accuracy

• Clause 7.3: Test duration

DL/T 849.6-2004

High-voltage Resonance Test Unit Specifications

• Sec 5.2: Capacitance requirements

• Annex A: Partial discharge limits

• Clause 6.3: Temperature stability

DL/T596-1996

Preventive Test Code for Electric Power Equipment

• Clause 9: Dielectric loss requirements

• Sec 11.4: Insulation test procedures

• Annex C: Test equipment specifications

IEC 358 (1990)

Coupling Capacitors and Capacitor Dividers

• Clause 4.1: Rated voltage

• Sec 5.3: Insulation levels

• Clause 8.2: Temperature coefficient

Dual-Function Operation

As Precision Voltage Divider

Compliant with GB50150 hand-over test requirements for:

• Transformer commissioning tests

• Cable withstand voltage verification

• GIS insulation integrity testing

As Coupling Capacitor

IEC 358-compliant signal coupling for:

• Protection relay communication

• Power line carrier (PLC) systems

• SCADA data transmission

Design Features for Standardized Testing

Oil-Immersed Construction

Meets IEC 358 Clause 6.1 for dielectric fluid insulation and thermal stability.

Removable Component System

DL/T596-compliant design for field maintenance and calibration.

Dual Insulation System

Separate HV (330kV) and LV (3kV) insulation meets GB50150 Annex B requirements.

Testing Protocol Compliance

Preventive Maintenance Testing (DL/T596)

1. Measure capacitance and tanδ at 20°C

2. Perform 3kV/1min test on LV arm

3. Verify PD level

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4. Record temperature coefficient validation

Commissioning Tests (GB50150)

1. 330kV/1min withstand test on HV arm

2. Accuracy verification at multiple voltage points

3. 60-minute continuous operation test

4. Dielectric loss measurement at 20°C

Operational Benefits

• Regulatory Compliance: Meets all Chinese and international testing standards

• Certification Ready: Includes standard-compliant test reports

• Thermal Stability: 5×10⁻⁵ %/°C coefficient ensures consistent results

• Dual-Function Efficiency: Single instrument for measurement and communication

"The comprehensive standards compliance eliminated certification delays - we passed GB50150 hand-over tests 30% faster than with conventional equipment."
               - Chief Engineer, Power Grid Construction Project

Installation & Certification Protocol

1. Documentation Review: Verify standard-compliant test certificates

2. Site Assembly: Install removable components per DL/T849.6

3. Insulation Verification:

• HV arm: 330kV/1min test per GB50150

• LV arm: 3kV/1min test per IEC 358

4. Performance Validation:

• Dielectric loss measurement at 20°C

• Accuracy verification at 50%, 80%, 100% Un

• PD test at 300kV and 240kV

5. Continuous Operation Test: 60-minute run at 300kV

6. Certification: Issue GB50150-compliant hand-over report

Certification & Documentation

Each unit includes standard-compliant test reports:

• GB50150-2006 Annex B test certificate

• IEC 358 Clause 8 compliance report

• DL/T596-1996 preventive test record

• Temperature coefficient validation data

Third-party certified by CEPRI (China Electric Power Research Institute).