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Jiangsu Dingxin Electric Co., Ltd.
Jiangsu Dingxin Electric Co., Ltd. is located in the Industrial Park of Haian Development Zone, a development zone in Jiangsu Province. It is a high-tech enterprise in Jiangsu Province specializing in the production of power equipment, with an annual production capacity of 50 million KVA. It mainly produces 110KV, 220KV and 500KV ultra-high voltage transformers, various dry-type transformers, oil-immersed transformers, amorphous alloy transformers, wind and solar energy storage transformers, prefabricated substations and reactors of various specifications with voltage levels of 35KV and below. , electric furnace transformer, rectifier transformer, mining transformer, split transformer, phase shift transformer and other special transformer. As China Wholesale 110KV-220KAV Power Transformer Suppliers and ODM 110KV-220KAV Power Transformer Company, companies have successively passed IS09001, ISO14001, ISO45001, ISO19011 system certification. Among the customers we cooperate with are many urban and rural power grids, as well as petrochemical, metallurgical, textile enterprises, mines, ports, residential communities, etc. We have long-term cooperation with many well-known companies, and we are also qualified suppliers for many listed companies in the electrical industry. Product sales cover the national market and are exported to Europe, the United States, Australia, Indonesia, Russia, Africa, Vietnam and other countries.
Certificate Of Honor
  • Business Licence
  • S22-M-250/10-Nx1 And Energy Efficiency Report
  • SCB18-800/10-NX1 And Energy Efficiency Report
  • SCB18-500/10-NX1 And Energy Efficiency Report
  • SCB18-2500/10-NX1 And Energy Efficiency Report
  • S13-M-1000/10KV Type Test Report
  • S13-M-1000/20KV Type Test Report
  • S13-M.RL-630/10KV Type Test Report
Industry knowledge
How does 110KV-220KAV Power Transformer cope with surge current during power-on?
Power transformers, including those rated at 110 kV to 220 kV, are subjected to surge currents during power-on or energization. These surge currents, often referred to as inrush currents, occur due to the sudden energization of the transformer's winding. Coping with surge currents is crucial to prevent excessive stresses on the 110KV-220KAV Power Transformer and associated electrical equipment. Here's how a power transformer copes with surge currents during power-on:
Transformer Design:
Transformers are designed with specific characteristics to handle inrush currents. The design includes factors such as the core material, winding configuration, and the choice of insulation materials.
The core is designed to have low magnetic reluctance, which helps minimize the impedance during inrush conditions.
Saturation of Core:
During the initial moments of energization, the magnetic core of the 110KV-220KAV Power Transformer may saturate. Saturation reduces the inductive reactance and allows the inrush current to flow more easily, limiting the voltage rise across the windings.
Core Restraint Systems:
Transformers may incorporate core restraint systems, such as restraining bars or shunt reactors, to prevent excessive movement of the core during inrush conditions. This helps maintain stability and reduce the impact of inrush currents.
Flux Limiting Devices:
Some transformers use devices like flux-limiting reactors or series reactors in the winding to control the rate of rise of inrush current and prevent saturation.
Use of Pre-insertion Resistors:
In some high-voltage applications, pre-insertion resistors may be used to limit the rate of rise of the inrush current and control the transient phenomena during power-on.
Damping Circuits:
Damping circuits can be included in the transformer design to reduce the oscillations caused by inrush currents, preventing overvoltage conditions.
Tap Changers:
Transformer tap changers may be used to adjust the transformer turns ratio during energization, reducing the magnitude of the inrush current.
Bypass Reactors:
Bypass reactors connected in series with the transformer winding can help control inrush currents and limit the rate of rise of the voltage.
Advanced Protection Relays:
Advanced protection relays with inrush detection algorithms can be employed to differentiate between inrush currents and actual faults. These relays can issue commands to limit the impact of inrush.
Delayed Energization:
Some systems implement delayed energization schemes to stagger the startup of multiple transformers or loads, reducing the simultaneous occurrence of inrush currents.
Transformer Saturation Modeling:
Sophisticated modeling and simulation tools are used to analyze the transformer's response to inrush currents during the design phase, ensuring that the transformer can handle the anticipated surges.