However, the low-voltage drawer cabinet is divided into several models, but the calculation method for the consumption of copper bars is the same. After careful calculation, materials can be saved to the greatest extent, but in practice, many power equipment enterprises also purchase according to the principles of approximate consumption, raw materials and making full use of leftover materials, so as to save the consumption of copper bars. However, people in the industry do not know how to calculate the bronze consumption of low-voltage drawer cabinet, which still needs to be understood.

首先，铜牌的用量要注意参考以下的信息，用这些基础的原始数据进行计算：水平母线、仅限分支母线、框架断路器柜母排、抽屉柜铜排长度、电容柜铜排长度等等，这些数据有些是电力设计图纸中自带的，也有些需要通过其他数据计算的。我们详细了解一下。

First of all, the consumption of bronze medals should refer to the following information and be calculated with these basic original data: horizontal bus, branch bus only, frame circuit breaker cabinet bus, drawer cabinet copper bar length, capacitor cabinet copper bar length, etc. some of these data are included in the power design drawing, and some need to be calculated through other data. Let's look at it in detail.

水平母线长度计算

Calculation of horizontal bus length

一·水平母线的长度计算：

I. length calculation of horizontal bus:

水平母排的长度不但和柜子的宽度有关，但是还要考虑其他问题。水平母线的长度包括母排出柜顶的长度和柜内与主母线搭接部分。上进线的母排长度为柜宽，此种计算仅适用于上进线。侧进线前后均有水平母线，要将这部分因素考虑进去。原则上至少要加一半柜宽的主母排，为防止出现铜排少算的情况，建议好增加一台柜的主母排量。

The length of horizontal busbar is not only related to the width of cabinet, but also other issues should be considered. The length of the horizontal busbar includes the length of the busbar out of the cabinet top and the overlapping part with the main busbar in the cabinet. The busbar length of the upper incoming line is the cabinet width, and this calculation is only applicable to the upper incoming line. There are horizontal busbars before and after the side incoming line, which should be taken into account. The principle of adding at least half of the width of the main counter to the main counter is to prevent at least half of the displacement of the main counter.

进线分支母线长度计算

Length calculation of incoming branch bus

二·进线分支母线长度计算（铜排侧进线）

II. Length calculation of incoming branch bus (incoming line at copper bar side)

零排为规定侧进或采用三相四线、三相五线母线桥（槽）进线时，均需要增加此根引下零排的计算，如果是三相五线引进，还需要增加引下地排的计算，也就是分支地排也需要2.3米左右。

When the zero row is the specified side entry or the three-phase four wire and three-phase five wire bus bridge (slot) entry, the calculation of leading down the zero row needs to be added. If the three-phase five wire is introduced, the calculation of leading down the ground row also needs to be added, that is, the branch ground row also needs to be about 2.3m.

框架断路器母排长度计算

Calculation of busbar length of frame circuit breaker

框架断路器母排长度计算要点

Key points of busbar length calculation of frame circuit breaker

三·框架断路器母排长度计算要点

III. key points of busbar length calculation of frame circuit breaker

1·混装柜的铜牌计算方式应该为一台框架断路器+一台抽屉柜的数量，而不是仅仅按照单台框架或者单台抽屉的量进行计算。

1. The bronze medal of mixed cabinet shall be calculated as the number of one frame circuit breaker + one drawer cabinet, rather than just the number of single frame or single drawer.

2·框架相排ABC三相共5.5米（同级尺寸按单根）；抽屉垂直排：ABC三相共6米（垂直排单根，不含搭接排）

2. The ABC three-phase of frame phase row is 5.5m in total (the size of the same level is single); Drawer vertical row: ABC three-phase, 6m in total (single vertical row, excluding overlapping row)

3·进线柜同时带计量方案，由于计量时通常要比正常的低压仪表高0.2米左右，要在原有铜排长度的基础上每相增加0.4,米，断路器上方带刀熔开关的方案，也要考虑铜排总长度增加0.4米。

3. The incoming cabinet is equipped with metering scheme at the same time. Since the metering is usually about 0.2m higher than the normal low-voltage instrument, it is necessary to increase the length of copper bar by 0.4m per phase on the basis of the original length of copper bar. For the scheme with knife fuse switch above the circuit breaker, the total length of copper bar should also be increased by 0.4m.

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The above is the knowledge brought to you today. MNS low-voltage drawer cabinet has focused on the industry for many years and continuously provides users with valuable content. Please continue to pay attention to us for more content: //www.aqfitlab.com