Engineering Qualification
License for Installation (Repair, Testing) of Power Facilities
Safety Production License
Construction Enterprise Qualification Certificate
Service Content
Preventive electrical testing is a critical measure for determining whether power equipment can continue to be put into service, preventing equipment damage, and ensuring the safe operation of the power system; it is also an effective and optimal method for obtaining comprehensive “intelligence” on electrical equipment. Therefore, China’s regulations stipulate that all equipment in the power system must undergo preventive testing in accordance with the requirements of the Power Industry’s “Regulations on Preventive Testing of Power Equipment,” so as to identify and address potential problems before they occur.
The main categories include: transformers, switches, surge arresters, power cables, insulated conductors, relay protection, grounding systems, instrument transformers, capacitors, reactors and arc-suppression coils, as well as disconnect switches and high-voltage fuses.
1. For power equipment at the user end and distribution rooms/substation-type packaged substations with voltage levels of 220 kV and below, perform handover and preventive tests on high- and low-voltage equipment, relay protection tests, and cleaning and maintenance of all types of equipment. Through these tests and cleaning activities, gain a thorough understanding of the equipment’s operating condition, promptly identify operational defects, and propose reasonable recommendations for defect elimination.
2. Emergency repair of distribution equipment and lines: The primary task of the emergency repair team is to promptly address sudden faults in customers’ power supply systems—including distribution rooms and lines—so as to resolve issues efficiently in the shortest possible time and restore power supply without delay.
3. The primary task of the intelligent transformation and upgrade team is to carry out intelligent upgrades of distribution rooms (including packaged substations), enabling smart data acquisition, online digital management, equipment lifecycle management, fault early warning, and energy management. Meanwhile, the on-site specialist team provides professional power-use services, delivering more reliable, energy-efficient, and secure power supply solutions for customers.
4. Outsourced maintenance and operation of distribution rooms primarily involve acting on behalf of the user to provide on-duty staffing or conduct regular inspections of the distribution room.
| Test Object |
Testing Items |
| Transformer |
Infrared thermography inspection |
| Dissolved Gas Analysis in Oil |
|
| High-Frequency Partial Discharge Detection |
|
| Core Ground Current Measurement |
|
| Bushings, CT/PT, coupling capacitors |
Infrared Thermal Imaging Inspection |
| High-Frequency Partial Discharge Detection |
|
| Relative dielectric loss factor |
|
| Relative capacitance ratio |
|
| Surge arrester |
Infrared Thermal Imaging Inspection |
| High-Frequency Partial Discharge Detection |
|
| Continuous Current Monitoring During Operation |
|
| GIS Ontology |
Infrared thermography inspection |
| Ultra-High Frequency Partial Discharge Detection |
|
| Ultrasonic Partial Discharge Detection |
|
| SF6 gas humidity |
|
| SF6 gas purity |
|
| SF6 gas decomposition products |
|
| SF6 Gas Leak Imaging Detection |
|
| Switchgear |
Infrared Thermal Imaging Inspection |
| Ultrasonic Partial Discharge |
|
| Transient Voltage Detection |
|
| High-voltage cable |
Infrared Thermal Imaging Inspection |
| Outer Sheath Grounding Current |
|
| High-frequency partial discharge, ultra-high-frequency partial discharge, and ultrasonic partial discharge detection for cable terminations and intermediate joints |
Project Cases
Contact Us
National Service Hotline: 400-027-8938
Mobile (Manager Chen): +86 133-9714-9829
Address: Building 5, Donghu High-tech Industrial Innovation Base, No. 9 Miaoshan Avenue, Miaoshan Development Zone, Jiangxia District, Wuhan City
Scan it
Follow the official mobile website