Cabinet, also known as busbar voltage transformer cabinet or voltage transformer cabinet. There is usually a set of voltage transformers, a fuse, a lightning arrester, and other main electrical components installed inside. The fuse of the fuse provides protection for the voltage transformer. Voltage transformer is a device that converts high voltage into low voltage proportionally according to a certain transformation ratio, making it suitable for the voltage requirements of the instrument.

避雷器主要起到过电压和防雷保护。

The lightning arrester mainly serves as overvoltage and lightning protection.

电压互感器柜一般情况下采用组合式的结构，我们可根据工程的具体设计参数，配置不同类型和数量的PT。

The voltage transformer cabinet generally adopts a combined structure, and we can configure different types and quantities of PT according to the specific design parameters of the project.

柜的整体结构采用可拆卸金属铠装结构，设备面板上通常设有大面积的观察口。它可以随时观察PT柜的运行情况。每台PT设有一节车厢，其一、二次回路采用分接结构，实现一、二次室分离。柜体整体美观可靠，可实现现场抽取维护。

The overall structure of the cabinet adopts a detachable metal armor structure, and the equipment panel usually has a large area of observation ports. It can observe the operation of the PT cabinet at any time. Each PT is equipped with a carriage, and its primary and secondary circuits adopt a tap structure to achieve separation of the primary and secondary compartments. The overall appearance and reliability of the cabinet can achieve on-site extraction and maintenance.

PT柜的功能

Function of PT cabinet

（1）提供电气系统中的测量电压、仪器仪表电压和保护电压。

(1) Provide measurement voltage, instrument voltage, and protection voltage in the electrical system.

（2）为功率表提供测量电压。

(2) Provide measurement voltage for the power meter.

（3）可为相关设备提供操作和控制电源（PT）。

(3) It can provide operation and control power (PT) for relevant equipment.

（4）满足电气系统继电保护的需要。母线绝缘、欠电压、过电压、备用设备自投条件等。高压柜屏顶电压小母线由PT柜供电。

(4) Meet the needs of electrical system relay protection. Bus insulation, undervoltage, overvoltage, backup equipment self switching conditions, etc. The voltage small busbar on the top of the high-voltage cabinet screen is powered by the PT cabinet.

柜内有测量PT和计量PT（原来要求是要分开测量PT和计量PT，如没有特殊要求也可以不分开，可以共用）。顶部的小母线可用于向其他高压柜提供电源。同时为其它设备提供电源，满足测量、计量和保护电源的电压要求。

There are measuring PT and measuring PT in the cabinet (the original requirement was to separate the measuring PT and measuring PT, but if there are no special requirements, they can be left separate and can be shared). The small busbar at the top can be used to provide power to other high-voltage cabinets. Simultaneously providing power supply for other equipment to meet the voltage requirements for measurement, metering, and protection power supply.

PT柜和计量柜的区别

The difference between PT cabinet and metering cabinet

柜是电压互感器柜（PT为电压互感器的英文缩写），通常用于装设接于母线上的电压互感器，此电压互感器可用于测量和保护。

Cabinet is a voltage transformer cabinet (PT stands for voltage transformer), usually used to install voltage transformers connected to the busbar. This voltage transformer can be used for measurement and protection.

电力部门为了准确计量并能对各用户进行有效的计量管理，在用户侧会设一个专用的计量柜，柜内配置电压互感器、电流互感器及计量仪表。此表计的数据用于电费的结算。计量柜的管理权限为电力部门，用户无权进行维修和调试等工作。

In order to accurately measure and effectively manage various users, the power department will set up a dedicated measuring cabinet on the user side, which is equipped with voltage transformers, current transformers, and measuring instruments. The data in this table is used for the settlement of electricity bills. The management authority of the measuring cabinet is the power department, and users have no right to carry out maintenance and debugging work.