The design concept of () is used for reference by the convenient fixture for current differential test of EMU.

The convenient fixture for current differential test of EMU draws lessons from the design concept of convenience, humanization and practicality.

EMU, also known as "EMU train", is a new term of transportation in China and a type of modern train, which consists of several powered vehicles (bullet trains) and unpowered vehicles (trailers).

Trains run in a fixed grouping mode within the normal service life. Article 208th of Railway Technical Management Regulations stipulates that EMU trains are self-propelled fixed marshalling trains.

The simplest EMU is a car with its own power, such as Guangzhou Metro APM train. Power decentralized emus are composed of multiple emus and non-emus, such as harmony series emus.

There are also cases where the whole vehicle is powered, such as maglev trains. Power-concentrated EMUs consist of one or two EMUs located at the rear of the train and several non-power cars located in the middle, such as China Star Electric EMUs.

Compared with traditional trains, EMU has the characteristics of not changing the marshalling at will, turning back and not picking up trains. Among them, the multi-power distributed EMU has the advantages of light axle load, good acceleration performance and flexible operation, which is suitable for small groups and high-density passenger transport organizations and is widely used in intercity rapid transit and urban rail transit trains.

D series high-speed trains refer to "(ordinary) EMU passenger trains" in China's national railway transportation system, and the number of trains starts with "D", which is referred to as "D-prefix train" for short.

Its comprehensive grade is higher than express passenger trains and other ordinary trains, and lower than "high-speed EMU passenger trains (G prefix trains)" and "intercity EMU passenger trains (C prefix trains)".

In June, 2020, 5438+ 10 and June, 2020, 265438+ 10, the transnational interconnected high-speed EMU with a speed of 400 kilometers per hour independently developed by China rolled off the assembly line at CRRC Changke Railway Passenger Car Co., Ltd., and the trains can run between international railways with different climatic conditions, different track gauges and different power supply standards, making international and intercontinental travel more convenient.