The grounding device is composed of a grounding body and a grounding wire. The metal conductor that is buried in the ground and directly contacts the ground is called the grounding body. The metal conductor that must be connected to the grounding body in the electrical device is called the grounding wire. Several grounding bodies are connected to each other in the ground by a conductor. It is a grounding grid.

The grounding body is a metal body buried in the soil, such as steel pipe, angle steel, flat steel, etc., with a length of about 2.5 meters. The grounding body can be buried horizontally or vertically. When horizontally buried, flat steel is generally used to make the grounding body, and the depth of the buried level should not be less than 0.6 meters. Generally, steel pipes and angle steels with a wall thickness of 3.5 mm or more are used for vertical burial.

Use flat steel welded on the grounding body as the lead conductor, and weld the bolt on the lead conductor to connect with the ground wire. The grounding wire generally uses insulated copper wire or bare copper wire. The minimum cross-sectional area of ​​the grounding wire is 1.5 square millimeters for insulated copper wires and 4 square millimeters for bare copper wires.

The grounding device can provide simple, effective and economical protection for the bearing, and prevent the bearing damage caused by the working current or the system fault current and the lightning current passing through the bearing. Its working principle is: the current on the car body is directly transmitted to the axle through the grounding device by the grounding wire, and then the ground loop is formed through the wheels and the rail, as shown in the figure.

At present, the common axle-end grounding device structure in subway, passenger car and EMU vehicles is: the grounding body provides a conducting circuit for the bearing current and realizes the insulation with the axle box; the axle box cover realizes the installation of the grounding body and the axle box; friction The disc and the carbon brush located on the grounding body provide a reliable conduction circuit for the bearing current and realize low wear; the bearing pressure plate realizes bearing positioning and friction disc installation.

The axle box cover for the grounding device of subway and passenger car has a metal labyrinth structure to realize bearing sealing. The CRH1 EMU does not provide a labyrinth structure on the axle box cover to achieve bearing sealing, but relies on the good sealing performance of the bearing itself. The contact points of the carbon brushes with the above structures are close to the center of rotation, which has the advantages of low linear velocity and low wear.

Common Mode Choke (line Filter)

Common mode choke coils are used to suppress common mode noise. This type of coil is produced by winding the signal or supply wires one ferrite core. Since magnetic flux flows inside the ferrite core, common mode choke coils work as an inductor against common mode current. Accordingly, using a common mode choke coil provides larger impedance against common mode current and is more effective for common mode noise suppression than using several normal inductors.

Customized High Current 1mh Choke Coil Toroidal Inductor Common Mode Inductor
Common mode Inductor, also known as common mode choke, is commonly used in computer switching power supplies to filter common mode electromagnetic interference signals. In the board design, the common mode inductor also acts as an EMI filter to suppress the electromagnetic radiation generated by the high-speed signal line from radiating outward.

Toroidal Inductors are used for applications that include current sense transformers, common mode inductors, switching regulator inductors, input filter inductors, and more. These inductors provide excellent value - they are generally smaller in size and cost less than other inductors.

Toroidal Inductors provide a number of advantages over other inductor varieties, which include:

FAQ

1-MOQ?

We will work hard to fit your MOQ .Small purchase quantity is ok.

2-Payment term?

T/T, Western Union, Paypal, Credit Card

3-Delivery port?

Shenzhen, Guangzhou, Zhongshan, Hongkong.

4-Shipping date?

About 7 days when we check the payment.

5-Do you produce the core and bobbin by yourself .

Yes.we have 2 head company,1 subsidiary company.one is bobbin factory,one is core factory,last one is transformer factory.

6-Where is your factory?

In ShaanxI

Common Mode Choke,Toroidal Inductor Choke,Common Mode Choke Coils,High Power Toroidal Inductor

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