With the development of society, the smooth operation of the power system and the reliability of power supply have become increasingly important. For a long time, most of China's 6-66KV distribution networks have adopted a neutral point ungrounded operation mode. This operating mode allows for short-term fault operation when single-phase grounding, greatly improving the power supply reliability of the system.

The TZY-XHG-6~35KV arc suppression, harmonic suppression, and overvoltage comprehensive device developed by our company has a novel principle, complete functions, and high degree of automation, mainly reflected in installation and maintenance, reliability, control functions, and other aspects. Quickly reduce grounding arc and arc overvoltage, as well as ferromagnetic resonance. This device is suitable for arc suppression, harmonic suppression, and overvoltage protection in neutral point non effectively grounded distribution networks with voltage levels of 6~35KV. It is widely used in substations or power plants of power systems, as well as power supply systems of metallurgical, mining, petrochemical and other enterprises, and has a significant effect on improving the reliability and operation of system power supply.

2.1 All components of the TZY-XHG intelligent arc suppression, harmonic suppression, and overvoltage comprehensive device can be installed inside the switchgear, grouped together with other high-voltage switchgear panels, with small size, low cost, and easy installation.

2.2 Replace the voltage transformer cabinet and provide voltage detection signals.

2.3 It has overvoltage protection function, which can limit atmospheric overvoltage and operating overvoltage to lower voltage levels. The insulation of the power grid and electrical equipment greatly reduces accidents caused by overvoltage.

2.4 Replacing the arc suppression coil can quickly reduce intermittent arc grounding faults, suppress intermittent arc grounding overvoltage, prevent further expansion of accidents, and reduce the accident tripping rate of the line.

2.5 can quickly and effectively limit and reduce various resonant overvoltages, prevent long-term resonant overvoltages from accelerating the aging of the system insulation structure, prevent the impact of resonant overvoltages on lightning arresters and small inductive loads installed in the power grid, increase the reliability of system operation, and extend the service life of equipment in the system.

2.6 The action is accurate and reliable, without any misoperation or linkage, with segment locking function, complete functions, and easy maintenance.

2.7 The communication interface adopts the standard MODBUS communication protocol to transmit voltage signal values and fault information to the background for easy monitoring and control. The external dimensions are consistent with the central cabinet, and it can be installed with the central cabinet screen. The structure is compact and easy to maintain.

2.8 Use components produced by the company, with better components used in the core part. By strictly following the production process and testing, it effectively demonstrates that the quality of the product can reach stable and reliable standards.

3.1 Working environment

Environmental temperature: -25 ℃~+40 ℃

Environmental temperature: 90% (25 ℃), 50% (40 ℃)

Altitude: ≤ 2000 meters

Places without pollutants or explosive media that seriously affect the insulation performance of this device.

3.2 Performance indicators

3.2.1TZY-XHG intelligent arc suppression, harmonic suppression, and overvoltage comprehensive device rated parameters:

Rated frequency: 50HZ

Rated voltage: 6KV, 10KV, 35KV

3.2.2 Rated parameters of controller:

Working voltage: AC/DC 220V

Voltage measurement accuracy: 0.5%

Communication interface: RS-485