Shengdao (China) Electric Escorts BYD's Pure Electric Charging Facilities

Shengdao successfully won the bid for the construction of charging facilities such as BYD pure electric bus in Ningbo and electric bus in China in 2018, providing reliable support in terms of electricity and realizing strong alliance and mutual benefit and win-win situation.

CRRC Co., Ltd. is an A and H-share listed company formed by the merger of CSR and CNR in accordance with the principle of reciprocity with the consent of the State Council and the approval of the State-owned assets Supervision and Administration Commission of the State Council. On July 19, 2018, the global synchronization of the Fortune Global 500 list was released, and CRRC ranked 385.

BYD is a Chinese car brand, founded in 1995, which 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 manufacturer of rechargeable batteries in 2003 and established BYD Auto 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 subsequently rose to China's national strategy.

Product Introduction:

VSD2-12 indoor high voltage vacuum circuit breaker

VSD2-12 indoor high-voltage vacuum circuit breaker is indoor high-voltage switchgear with rated voltage of 12kV three-phase AC 50Hz. It is a high-performance high-voltage vacuum circuit breaker carefully designed and independently developed to adapt to the Chinese market on the basis of absorbing advanced technologies of similar products at home and abroad. It meets the latest relevant standards of GB, DL and IEC. It has complete specifications and series. It can operate stably in harsh environments with solid-sealed poles, the vacuum interrupter has extraordinary breaking performance, the mechanical life can reach 30000 times, and the new panel is beautiful and exquisite.

VSD2-12 vacuum circuit breakers have passed strict type tests (insulation, temperature rise, dynamic thermal stability and short-circuit breaking and closing under various conditions), and have also withstood high and low temperature tests (-40 ℃ ~ 70 ℃) and 9-intensity seismic tests.

Each VSD2-12 vacuum circuit breaker has to undergo 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 carry out mechanical characteristics tests to judge whether the opening and closing movement curve is smooth and smooth, reduce the amplitude of opening overshoot and rebound and the closing bounce time as much as possible, ensure the contemporarity of three-phase opening and closing, and ensure the perfection of the products leaving the factory.

High-voltage circuit breaker mechanical characteristics test system operation interface

Technical parameters:

1. Rated voltage: 12kV

2. Power frequency withstand voltage (1min): phase-to-ground 42kV, fracture 48kV

3. Lightning impulse (full wave): phase-to-ground 75kV, fracture 85kV

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

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

Applicable occasions:

VSD2-12 indoor high-voltage vacuum circuit breaker is not only used to connect and disconnect the circuit under normal conditions, but also used to cut off the short-circuit fault current. At the same time, it undertakes the dual tasks of control and protection. It is the core equipment of the power grid. It can be equipped with KYN28A-12 middle cabinet or XGN66A-12 fixed cabinet, it is widely used in the protection and control of medium voltage power distribution systems in the fields of energy, infrastructure, industry, commerce and civil buildings, and in the occasions of various loads and frequent operations. It is used in power plants, substations, commercial complexes, Data centers, high-rise buildings, residential quarters, etc., as the purpose of receiving and distributing electric energy, and has the functions of controlling, protecting and monitoring circuits.

Product production site: