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.

，銅牌的用量要注意參考以下的信息，用這些基礎的原始數(shù)據(jù)進行計算：水平母線、分支母線、框架斷路器柜母排、抽屜柜銅排長度、電容柜銅排長度等等，這些數(shù)據(jù)有些是電力設計圖紙中自帶的，也有些需要通過其他數(shù)據(jù)計算的。我們詳細了解一下。

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.

水平母線長度計算

Calculation of horizontal bus length

一·水平母線的長度計算：

I. length calculation of horizontal bus:

水平母排的長度不但和柜子的寬度有關，但是還要考慮其他問題。水平母線的長度包括母排出柜頂?shù)拈L度和柜內(nèi)與主母線搭接部分。上進線的母排長度為柜寬，此種計算僅適用于上進線。側(cè)進線前后均有水平母線，要將這部分因素考慮進去。原則上少要加一半柜寬的主母排，為防止出現(xiàn)銅排少算的情況，建議好增加一臺柜的主母排量。

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.

進線分支母線長度計算

Length calculation of incoming branch bus

二·進線分支母線長度計算（銅排側(cè)進線）

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

零排為規(guī)定側(cè)進或采用三相四線、三相五線母線橋（槽）進線時，均需要增加此根引下零排的計算，如果是三相五線引進，還需要增加引下地排的計算，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.

框架斷路器母排長度計算

Calculation of busbar length of frame circuit breaker

框架斷路器母排長度計算要點

Key points of busbar length calculation of frame circuit breaker

三·框架斷路器母排長度計算要點

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

1·混裝柜的銅牌計算方式應該為一臺框架斷路器+一臺抽屜柜的數(shù)量，而不是僅僅按照單臺框架或者單臺抽屜的量進行計算。

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（同級尺寸按單根）；抽屜垂直排：ABC三相共6米（垂直排單根，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·進線柜同時帶計量方案，由于計量時通常要比正常的低壓儀表高0.2米左右，要在原有銅排長度的基礎上每相增加0.4,米，斷路器上方帶刀熔開關的方案，也要考慮銅排總長度增加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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