CPF-10 Automatic Capacitance & Tan Delta Tester for HV Electrical Equipment

Core Test Objects

· Power Transformers & Instrument Transformers: Dielectric loss and capacitance measurement of oil-immersed and dry-type transformers, current transformers (CT), and voltage transformers (PT), including transformer winding insulation and bushing testing

· HV Bushings & Insulators: Capacitance and tanδ testing of transformer bushings, wall bushings, and composite/porcelain insulators, detecting insulation aging, moisture ingress, and internal defects

· HV Power Cables & Accessories: Dielectric loss measurement of XLPE power cables, cable joints, and terminations, evaluating insulation aging and water tree degradation

· Capacitors & Surge Arresters: Capacitance and dissipation factor testing of power capacitors, and insulation performance assessment of metal oxide surge arresters

· GIS & HV Switchgear: Insulation dielectric loss testing of gas-insulated switchgear, circuit breakers, and other HV switchgear components

· Rotating Machinery: Stator winding insulation dielectric loss testing of HV generators and motors in power plants and industrial facilities

Industry-Specific Usage

· Electric Power Utilities: Substation equipment commissioning, handover acceptance test, routine preventive maintenance, and fault diagnosis of transmission and distribution assets

· Electrical Equipment Manufacturers: Production line quality control, factory outgoing inspection, and type testing for transformers, bushings, switchgear, and capacitors

· Industrial & Petrochemical: HV power system equipment maintenance and safety verification for high-reliability production facilities and hazardous area electrical equipment

· Rail Transit & Urban Infrastructure: Traction power supply equipment insulation testing for metro, high-speed railway, and urban rail transit systems

· Third-Party Testing & Certification Institutions: Compliance testing, performance verification, and arbitration testing of HV electrical equipment

· HV Research & Academic Institutions: Insulation material research, dielectric performance testing, and high-voltage engineering experimental research

Strict Global Standard Compliance

Fully designed, calibrated, and tested in accordance with IEC 60247 (Insulating liquids – Determination of dielectric dissipation factor), IEC 60076-3 (Power transformers – Insulation levels, dielectric tests and external clearances in air), IEEE C57.12.90 (Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers), and GB/T 3048 international standards. Test data is globally recognized, meeting the requirements of equipment factory certification, international project handover, and third-party testing.

Unmatched On-Site Anti-Interference Performance

The core advantage of the CPF-10 is its industry-leading 45/55Hz automatic dual-frequency variable frequency technology, which effectively suppresses 50/60Hz power frequency electromagnetic interference in harsh substation environments. Combined with advanced digital filtering and phase correction technology, it delivers stable and accurate test results even in strong electromagnetic fields, without the need for a dedicated shielded room, making it ideal for both laboratory and field use.

Ultra-High Precision & Wide Test Range

±0.05% tanδ measurement accuracy and 3pF ~ 60μF ultra-wide capacitance measurement range, adapting to all types of HV electrical equipment, from small instrument transformers and bushings to large-capacity power transformers and long power cables. It delivers stable and accurate measurement performance for all test scenarios, capturing minor insulation degradation at an early stage.

All-In-One Full Test Mode Coverage

Unlike single-function testers, the CPF-10 integrates all mainstream test modes: UST, GST, CVT self-excitation, cable test, and insulation resistance measurement. It replaces multiple separate test instruments, eliminating repeated wiring, cutting test time by 50%, and reducing user equipment investment and on-site operation workload.

Intelligent Fully Automatic Operation

One-click automatic test flow covers voltage ramp-up, timed measurement, data recording, voltage ramp-down, and report generation. Even non-specialist operators can complete standardized, compliant dielectric loss testing with minimal training, greatly reducing the operational threshold and human error in HV testing.

Field-Proven Portable & Rugged Design

All-in-one portable rugged chassis with a net weight of only ~18kg, easy to transport and deploy in remote substations and industrial sites. Wide operating temperature range and industrial-grade components ensure stable performance in harsh outdoor environments, with low failure rate and minimal maintenance costs.

Low Total Cost of Ownership

Integrated multi-functional design eliminates the need to purchase separate test equipment, reducing upfront capital expenditure. High-stability industrial-grade components ensure long service life with minimal maintenance costs, while its ability to detect early insulation defects helps clients avoid costly equipment failures and unplanned downtime.

Q: What international standards does the CPF-10 comply with?

A: The tester is fully designed, calibrated, and tested in accordance with IEC 60247, IEC 60076-3, IEEE C57.12.90, and GB/T 3048 international standards for dielectric loss and capacitance measurement, with globally recognized test results.

Q: What is the tanδ measurement accuracy of the CPF-10?

A: The tanδ measurement accuracy is ±0.05% ±0.00005, with a resolution of 0.001%, enabling it to capture minor insulation degradation at an early stage.

Q: What types of HV equipment can this tester test?

A: It is suitable for all medium and high voltage electrical equipment, including power transformers, instrument transformers (CT/PT), HV bushings, power cables and accessories, power capacitors, surge arresters, GIS, HV switchgear, and HV generators/motors.

Q: Can it perform accurate testing in on-site substation environments with strong electromagnetic interference?

A: Yes. It adopts advanced 45/55Hz automatic dual-frequency variable frequency technology, combined with digital filtering and phase correction, which effectively suppresses 50/60Hz power frequency electromagnetic interference, ensuring stable and accurate test results even in harsh on-site environments.

Q: Can it test capacitive voltage transformers (CVT)?

A: Yes. It has a dedicated CVT self-excitation test mode, with a built-in low-voltage high-current output for self-excitation testing of CVTs, no need for additional booster equipment.

Q: What test modes does the CPF-10 support?

A: It supports all mainstream test modes: UST (Ungrounded Specimen Test / Positive Connection), GST (Grounded Specimen Test / Reverse Connection), CVT Self-Excitation Mode, Cable Dielectric Loss Mode, and Insulation Resistance Measurement Mode.

Q: Can it automatically generate test reports?

A: Yes. The built-in professional test software supports automatic generation of IEC standard compliant test reports in Excel/PDF format, with full test data, parameters, and time stamps included. It also has a built-in thermal printer for on-site real-time report printing.