EN
GD6900 Multi-Function Variable Frequency Dielectric Loss Tester
GD6900 Digital Intelligent Multi-Function Variable Frequency Dielectric Loss Tester (0.5-10kV Output) with 6 Frequency Combinations, Built-in SF6 Standard Capacitor, Integrated Insulation Resistance (IR/DAR/PI), LCR, CVT Ratio & Angle Difference Test, Thermal Printer, for Power Equipment On-Site Comprehensive Insulation Test.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GD6900 is a professional, all-in-one field-optimized dielectric loss test instrumentexclusively designed for comprehensive insulation condition assessment of high-voltage power equipment. It fully complies with DL/T 474.3-2018 and IEC 60247:2004 standards, adopting advanced digital frequency conversion technology and full-digitized sampling to effectively eliminate 50/60Hz power frequency interference, ensuring stable and reliable test results even in strong electromagnetic environments such as 500kV substations.
The instrument features an integrated all-in-one design with a built-in high-power variable frequency power supply, step-up transformer, SF6 high-stability standard capacitor (temperature coefficient <1ppm/℃), insulation resistance test module, LCR measurement module and thermal printer. Equipped with a 7-inch high-resolution color touch screen and intuitive graphical interface, it supports six test frequency combinations and multiple test modes. It can automatically measure dielectric loss factor (tanδ), capacitance (Cx), power factor (PF), insulation resistance (IR), absorption ratio (DAR), polarization index (PI), inductance (L), resistance (R), CVT transformation ratio and voltage angle difference. With comprehensive safety protection and portable design, it is the ideal all-in-one solution for on-site insulation testing. Ideal for factory acceptance tests, on-site commissioning tests and preventive maintenance tests of power transformers, bushings, instrument transformers, capacitors, CVTs and surge arresters.
Specifications
| Parameter | Specification |
|---|---|
| High-Voltage Output | 0.5kV – 10kV AC (RMS), continuous adjustable, 0.1kV step (12kV optional) |
| Output Capacity | 2000VA |
| Test Frequencies | 50Hz, 47.5Hz/52.5Hz, 45Hz/55Hz, 60Hz, 57.5Hz/62.5Hz, 55Hz/65Hz |
| Frequency Accuracy | ±0.01Hz |
| Output Waveform Distortion | <1% (THD) |
| Dielectric Loss (tanδ) Accuracy | ±(1.0% of reading + 0.04%) |
| Capacitance (Cx) Accuracy | ±(1.0% of reading + 1.0pF) |
| Measurement Range | tanδ: 0 – 100% Cx: 15pF – 300nF (10kV: <60nF, 5kV: <150nF, 1kV: <300nF) |
| Resolution | tanδ: 0.001%, Cx: 0.001pF |
| Built-in Standard Capacitor | SF6 gas-insulated, 100pF, temperature coefficient <1ppm/℃, stability <0.01%/year |
| Insulation Resistance Test | DC 5kV/10kV output, measures IR, DAR, PI Range: 100kΩ – 1000GΩ Accuracy: <5% (100kΩ-100GΩ), 10% (100GΩ-1000GΩ) |
| LCR Measurement | Measures L, C, R, phase angle Range: L>20H (2kV), R>10kΩ (2kV) Accuracy: 0.1% |
| CVT Test | C1/C2 tanδ & capacitance, transformation ratio, angle difference Ratio range: 10 – 10000 Ratio accuracy: 0.1% Angle difference resolution: 0.01° |
| Test Modes | Forward connection, Reverse connection, CVT self-excitation, External voltage, Inner standard, External standard, GST/UST |
| Display | 7-inch high-resolution color touch screen |
| Printer | Built-in thermal printer |
| Data Storage | 200 groups (with time stamp, power-off protection) |
| Data Export | USB interface, PDF/Excel report generation |
| Language Support | Chinese/English bilingual |
| Power Supply | AC 220V±10%, 50/60Hz (supports generator power supply) |
| Protection Functions | Over-voltage, Over-current, Short-circuit, Automatic discharge, Ground detection, Input voltage fluctuation protection |
| Dimensions (mm) | Main unit: 350(L)×270(W)×270(H) Accessory box: 350(L)×270(W)×160(H) |
| Weight | Main unit: ~22.75kg Accessory box: ~5.25kg |
| Operating Temperature | -15℃ ~ +40℃ |
| Operating Humidity | ≤80%RH (non-condensing) |
| Altitude | ≤2000m |
| Compliance | DL/T 474.3-2018, IEC 60247:2004, GB/T 5654-2007, IEC 60076-1:2022 |
Applications
Core Test Objects
- Power transformers: winding dielectric loss, capacitance and insulation resistance test
- Transformer bushings: oil-impregnated paper bushings, epoxy resin bushings
- Instrument transformers: current transformers (CT) and voltage transformers (VT)
- Capacitor voltage transformers (CVT): C1/C2 tanδ & capacitance, transformation ratio and angle difference test (self-excitation method)
- Power capacitors: shunt capacitors, series capacitors
- Surge arresters: metal oxide surge arresters
- Cables: high-voltage power cables
- Insulating oil: dielectric loss test of transformer oil (with optional oil cup and heating controller)
Typical Usage Scenarios
- Power companies: on-site preventive maintenance tests of substation equipment
- Transformer manufacturing plants: factory acceptance tests (FAT) of transformers and bushings
- Third-party testing institutions: compliance testing and certification
- Power plants: generator transformer and auxiliary equipment insulation tests
- Research institutes: insulation material performance research and development
- Mining and industrial enterprises: high-voltage equipment inspection and maintenance
Advantages
Compliance with International Standards
Fully meets DL/T 474.3-2018, IEC 60247:2004 and GB/T 5654-2007 standards → test results are globally recognized
All-In-One Multi-Function Design
Integrates dielectric loss, capacitance, insulation resistance, LCR and CVT comprehensive test → one instrument completes all on-site insulation tests, reduces equipment weight by 70%
6 Frequency Combinations
Supports 50/60Hz and multiple dual-frequency combinations → adapts to global power grid frequencies, provides superior anti-interference performance
Built-in Thermal Printer
Directly prints test reports on-site → eliminates manual recording errors, improves work efficiency
CVT Comprehensive Test
One-time wiring completes C1/C2 tanδ, capacitance, transformation ratio and angle difference test → no need to change leads, test time reduced by 60%
Insulation Resistance Test Module
Built-in 5kV/10kV DC power supply, measures IR, DAR and PI → no need for additional insulation resistance tester
Rugged Field Design
Waterproof and dustproof case, wide operating temperature range → suitable for harsh field environments
Comprehensive Safety Protection
Multiple protection layers + ground detection + automatic discharge → maximum safety for operators and expensive test equipment
FAQ
Q: Can GD6900 test CVT transformation ratio and angle difference?
A: Yes. It has a dedicated CVT comprehensive test mode. One-time wiring can complete C1/C2 tanδ & capacitance, CVT transformation ratio and voltage angle difference test simultaneously, without changing leads or disassembling the CVT.
Q: Does it support insulation resistance test?
A: Yes. It has a built-in 5kV/10kV DC power supply, which can measure insulation resistance (IR), absorption ratio (DAR) and polarization index (PI), eliminating the need for an additional insulation resistance tester.
Q: Does it have a built-in printer?
A: Yes. It has a built-in thermal printer that can directly print test reports on-site, including test curves, data and diagnosis results, which is very convenient for field testing.
Q: Can it test insulating oil dielectric loss?
A: Yes. With an optional standard oil cup and heating controller, it can perform dielectric loss test of transformer oil and other insulating liquids, meeting the requirements of IEC 60247 and GB/T 5654 standards.
