Shengdao successfully won the bid for the 2018 Ningbo BYD pure electric bus and CRRC electric bus and other charging facilities construction projects, providing reliable support in the field of electricity, achieving a strong alliance, mutual benefit and win-win.

CRRC Co., Ltd. is an A+H-share listed company established by the merger of China South Locomotive Co., Ltd. and China North Locomotive Co., Ltd. in accordance with the principle of reciprocity with the approval of the State Council and the State-owned Assets Supervision and Administration Commission of the State Council. On July 19, 2018, the global synchronization "Fortune" Fortune 500 list was released, and CRRC ranked 385.

BYD is a Chinese automobile brand, founded in 1995, mainly produces business cars and family cars and batteries. Starting from a scale of more than 20 people, it grew into the world's second largest rechargeable battery manufacturer in 2003, and BYD Auto was established in the same year. In the commercial vehicle market, BYD has a rich product line of pure electric buses, pure electric trucks and pure electric forklifts. In 2012, BYD released the “Urban Bus Electrification” solution, which was subsequently elevated to China's national strategy.

Product introduction:

VSD2-12 indoor high voltage vacuum circuit breaker

VSD2-12 indoor high-voltage vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 12kV, three-phase AC 50Hz, and is carefully designed and independently developed to adapt to the Chinese market on the basis of absorbing the advanced technology of the same type of products at home and abroad. The high-performance high-voltage vacuum circuit breaker complies with the latest relevant standards of GB, DL and IEC. It has a complete range of specifications and a solid-sealed pole that can operate stably in harsh environments. The vacuum interrupter has extraordinary breaking performance and can have a mechanical life. Up to 30,000 times, the new panel is beautiful and exquisite.

The VSD2-12 vacuum circuit breaker has passed strict type tests (assessment of insulation, temperature rise, dynamic thermal stability and short-circuit breaking and closing under various conditions), and has also withstood high and low temperature tests (-40°C). ～70℃) and 9-intensity seismic test.

Each VSD2-12 vacuum circuit breaker undergoes 300 opening and closing running-in tests before leaving the factory, which further improves the reliability of the whole machine. Special testing instruments are also used to test the mechanical characteristics to determine the opening and closing movement curve. Whether it is smooth and smooth, minimize the amplitude of opening overshoot and rebound and the time of closing bounce, to ensure the synchronization of three-phase opening and closing, and to ensure that the products shipped out of the factory are flawless.

Operation interface of high-voltage circuit breaker mechanical characteristic test system

Technical Parameters:

1. Rated voltage: 12kV

2. Power frequency withstand voltage (1min): 42kV between phases and ground, 48kV fracture

3. Lightning impact (full wave): 75kV between phases and ground, 85kV fracture

4. Rated current: 630A, 1250A, 2000A, 2500A, 3150A, 4000A

5. Rated short-circuit breaking current: 20kA, 25kA, 31.5kA, 40kA

Applications:

VSD2-12 indoor high voltage vacuum circuit breaker is used to connect and disconnect the circuit under normal conditions, and to cut off short-circuit fault current. It also undertakes the dual tasks of control and protection. It is the core equipment of the power grid and can be equipped with KYN28A. -12 mid-mounted cabinets, can also be equipped with XGN66A-12 fixed cabinets, which are widely used in the protection and control of medium-voltage power distribution systems in the fields of energy, infrastructure, industry, commerce and civil buildings, as well as switching various loads of different natures. Frequent operation occasions, used in power plants, substations, commercial complexes, data centers, high-rise buildings, residential quarters, etc., for receiving and distributing electrical energy, and has the functions of controlling, protecting and monitoring circuits.

Product production site: