Non-intrusive partial discharge detection provides a fast and simple method to identify potential insulation faults that may cause power outages or personal injury. Partial discharge is an electrical discharge that does not completely short-circuit the electrodes. The amplitude of such discharges is usually very small. However, they do cause continuous degradation of insulation performance, ultimately leading to failure of electrical equipment.
Partial discharge radiates energy in the following ways:
Electromagnetic energy: radio waves, light, heat. Acoustic energy: sound waves, ultrasonic waves.
Gases: ozone, nitrogen oxides.
The most practical non-intrusive detection techniques are based on detecting the high-frequency part of the electromagnetic spectrum and ultrasonic signals. The ZD9100G portable partial discharge detector is a specially developed instrument that is easy to operate for detecting electromagnetic waves and ultrasonic activity. The ZD9100G portable partial discharge detector is suitable for partial discharge measurement of various high-voltage electrical equipment, representing the advanced technology of domestic digital partial discharge detectors.
ZD9100Gportable partial discharge detector is a new type of instrument that has a very wide range of applications in power testing. What are the applications of partial discharge testers?
1. Fault finding in GIS switch drive mechanisms to prevent switch refusal and maloperation accidents
High-voltage GIS switch operations are mostly driven by hydraulic or compressed air. To ensure the normal operation of the hydraulic and pneumatic drive systems, the motor must be started regularly to pressurize and verify the reliability of the system performance. However, accidents caused by external factors that slow down or fail the drive are increasing, seriously threatening the stable operation of the power grid and affecting people's lives and production.
The partial discharge detector uses advanced ultrasonic principles and exquisite sensing technology to vividly detect internal leaks in hydraulic and pneumatic systems, identify drive faults in advance, and notify operation and maintenance personnel digitally and audibly to eliminate defects, ensuring the safe operation of GIS.
2. Insulator pollution flashover and internal crack detection, cable joint partial discharge detection
Various types of insulator internal crack faults and external pollution faults also urgently need effective methods to detect. When the air around insulators is ionized, chemical reactions occur, corroding metal parts and weakening the insulation capability of the insulating material. The high energy generated by corona discharge can cause severe damage to mechanical components, resulting in unplanned outages, and in severe cases, fire and explosion. The partial discharge detector can accurately perform partial discharge detection and is an effective detection method.
3. Internal partial discharge fault detection in GIS/GCB and switchgear, power cabinets, and communication cabinets
Internal partial discharge faults in GIS/GCB and switchgear in control rooms of power plants and substations are increasing, and there is an urgent need for appropriate detection methods for predictive maintenance and alarm. The partial discharge patrol detector comes at the right time. The insulation media of GIS/GCB are different, and the propagation speed of internal and external partial discharges also differs. Electrical operation and maintenance personnel urgently need a detection method that is simple to operate, reasonably priced, and safe for spring and autumn inspections as well as routine predictive maintenance. The partial discharge detector can fully meet these needs.
4. Partial discharge detection for transformers, bushing, CT/PT, capacitors, and reactors
Transformers, bushing, CT/PT, capacitors, and reactors in substations, due to problems during manufacturing, transportation, and installation, are increasingly causing internal partial discharge and even accidents, urgently requiring appropriate detection methods. The partial discharge patrol detector overcomes the shortcomings of infrared technology, which can only measure surface thermal faults and cannot detect internal faults and their causes, making it the best choice for electrical operation and maintenance personnel in various countries.
5. SF6 gas leak detection
The partial discharge detector is suitable for leak location in SF6 transformers, switches, and circuit breakers in substations and power plants, ensuring the safe operation of SF6 equipment.
