Voltage transformer handcart, application method thereof and power distribution cabinet

Abstract

The invention provides a voltage transformer handcart, a use method thereof and a power distribution cabinet. The power distribution cabinet is provided with a main circuit copper bar. The voltage transformer handcart comprises a voltage transformer, a conductive copper bar, a bottom plate, a first moving device and a second moving device, wherein the first moving device and the second moving device are matched with each other. The voltage transformer is connected with the conductive copper bar and is fixed on the bottom plate, and the first moving device is also fixed on the bottom plate; the second moving device is fixed on the power distribution cabinet; and the first moving device and the second moving device are matched with each other to move back and forth to drive the bottom plate so as to drive the conductive copper bar to be in contact with or separated from the main circuit copper bar. The invention provides a voltage transformer handcart which is simple in structure, simple and convenient to operate, low in cost, reliable in circuit connection and particularly suitable for occasions where a ship medium-voltage power distribution cabinet does not need to be frequently pushed in and pulled out of the handcart but is easy to swing along with a ship.

Description

technical field [0001] The present application relates to the technical field of electrical equipment, in particular to a voltage transformer handcart, a method of using the same, and a power distribution cabinet. Background technique [0002] The existing voltage transformer handcart is generally installed with 3 or 2 voltage transformers. As a common component of the medium voltage level 6~12kV power distribution cabinet, it is mainly used to convert the voltage and provide the measuring instruments and relay protection. device is powered. At present, the voltage transformer handcart has a central type that is installed in the middle of the medium-voltage distribution cabinet and can be drawn out, and there is also a lower-mounted type that is installed in the lower part of the medium-voltage distribution cabinet and can also be drawn out. It is composed of voltage transformer, fuse, contact arm, contact head, handcart body, handcart base plate propulsion mechanism, secon...

AI Technical Summary

Problems solved by technology

[0003] The existing design of the voltage transformer handcart actually borrows the propulsion base plate and mechanism of the standard circuit breaker handcart (the most important part in the medium-voltage distribution cabinet), and uses a contact arm similar to the circuit breaker. Although the same contact simplifies the design workload and some accessories can be used in common, it also causes the structure of the entire voltage transformer to be bloated. The use of a special push-in base plate also requires a special guide rail to be installed on the cabinet. The overall cost is due to the large number of components. And the complexity will be high. When the voltage transformer is installed in the lower part of the medium voltage power distribution cabinet (with a circuit breaker handcart installed in the middle), the space is extremely crowded. Since the propulsion mechanism is located at the bottom of the medium voltage power distribution When driving, the handle rotates and touches the ground, and the operation is very difficult. The propulsion mechanism with mature structure and complete functions loses the meaning of its original design; especially the existing voltage transformer handcart is used In the lower part of the power distribution cabinet, there is still the problem that the handcart is only fixed by two lock tongues and supported by four rollers, so the bottom plate is easy to shake with the ship, and the contact between the contacts and the main circuit is not reliable.

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