High-voltage cable L type connector for motor train unit

Abstract

The invention relates to a high-voltage cable L type connector for a motor train unit. The connector comprises a protection unit and a pair of joint unit arranged in the L shape in the protection unit; the joint units are connected with an L-shaped connecting piece, and the L-shaped connecting piece comprises an L-shaped center conductor and an L shaped insulating sleeve which sleeves the center conductor; each joint unit comprises a contact, a stress cone, compression hardware and protection hardware arranged successively; and grooves cooperated with the corresponding contacts and stress cones are arranged in the two ends of the L-shaped center conductor respectively. The high-voltage cable L type connector for the motor train unit is simple in structure, pluggable, convenient to installand maintain, high in stability and flame resistance, and capable of handling cable arrangement in a high voltage jumper wire system of the motor train unit, and can be popularized widely.

Description

technical field [0001] The invention relates to an L-shaped connector for a high-voltage cable for an EMU, and belongs to the technical field of electric equipment for an EMU. Background technique [0002] With the continuous improvement of my country's transportation industry, China's EMUs have ushered in a golden age of construction and development. The 27.5kV L-shaped connector is an important part of the EMU traction power supply system, and its reliability directly affects the safe operation of the EMU. Among them, the L-shaped connector is installed on the top of the EMU train and connects the cables between the carriages. Its function is the same as that of the middle joint connecting two sections of cables in the power system, but the two ends of the cable connected by the middle joint in the power system are in the same straight line. On the EMU train, the two connecting cables are respectively located in the middle of the top of the train and in the dark pipe on th...

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the continuous development of the rail transit industry, the country has higher and higher performance requirements for 27.5kV L-type connectors for EMUs. At present, the products are imported from abroad, and the products are monopolized by companies such as Tyco in the United States, Nexans in France, and Hitachi in Japan. Its supply price is expensive and its performance cannot fully meet the requirements of use, which seriously restricts the development of my country's EMU industry

[0004] Moreover, foreign imported products cannot fully meet the use requirements in the following performance aspects: cannot effectively cope with the cable arrangement in the high-voltage jumper system of the EMU; cannot fully meet the electrical performance requirements specified in GB / T 28427-2012 (AC withstand voltage 124kV* No flashover or breakdown for 5 minutes, no breakdown or flashover for impulse voltage ±250kV*10 times); cannot fully meet the pluggable functions, and is inconvenient for product installation and later maintenance; cannot fully meet the flame retardant requirements ( DIN 5510-2 combustion grade S4, smoke grade SR2, dripping object grade ST2; EN44545-2 oxygen index R22 / R23, smoke density R22 / R23, toxicity test R22 / R23); cannot fully meet the pressure stability within 30 years sexual demands

At present, the performance of 27.5kV L-shaped connector seriously restricts the development of my country's railway transportation

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