Page 60 - 山东开川电力设备有限公司

GGD
低压成套开关柜
Low-voltage switchgear

电气性能/Electrical performance

主电路方案 /Main circuit scheme
GGD柜的主电路设计了 129个方案，共298个规格(不包括辅助电路的功能变化及控制电压的变化而派生的方案和规格)；
其中：
GGD1型 49个方案 123个规格；
GGD2型 53个方案 107个规格；
GGD3型 27个方案 68个规格；
主电路方案是征求了广大设计、使用部门的意见选编的，增加了发电厂需要的方案。额定电流至3150A，适合2000kVA及以下的配电变压器选用。此外，为
适应无功补偿的需要设计了GGJ1、GGJ2电容补偿柜，其主电路方案4个，共12个规格。
The main circuit of the GGD cabinet is designed with 129 schemes and a total of 298 specifications (excluding the functional changes of the auxiliary circuits
and the control schemes and specifications derived from the control voltage);
among them:
GGD1 type 49 programs 123 specifications;
GGD2 type 53 programs 107 specifications;
GGD3 type 27 plans 68 specifications;
The main circuit plan is to solicit the opinions of the vast number of design and use departments, and increase the need for power plants. The rated current
is up to 3150A, suitable for distribution transformers of 2000kVA and below. In addition, in order to meet the needs of reactive power compensation, GGJ1
and GGJ2 capacitor compensation cabinets are designed. The main circuit scheme is 4, with a total of 12 specifications.

辅助电路方案 /Auxiliary circuit scheme
辅助电路的设计分供用电方案和发电厂方案两部分，GGD柜内有足够的空间安装二次元件，同时NLS还开发研制了专用的LMZ3D型电流互感器以满足发电
厂和特殊用户附设继电保护时的需要。
The design of the auxiliary circuit is divided into two parts: the power supply scheme and the power plant scheme. There is enough space in the GGD cabinet
to install the secondary components. At the same time, NLS has also developed a dedicated LMZ3D current transformer to meet the needs of power plants
and special users. The need for electrical protection.
主母线 /Main bus
考虑到价格比和以铝代铜的可行性，额定电流在1500A及以下时可采用单铝排母线，额定电流大于1500A时采用双铜排母线，生产厂按此规定制造样机并通
过型式试验，当然，生产厂也可根据用户的要求将铝母线换成同等载流量的铜母线。
母线的搭接面均采用搪锡工艺处理。
Considering the price ratio and the feasibility of using aluminum to replace copper, the single-aluminum busbar can be used when the rated current is 1500A
or less, and the double-copper busbar is used when the rated current is greater than 1500A. The manufacturer manufactures the prototype according to
this specification and passes the type test. Of course, the manufacturer can also replace the aluminum busbar with the copper busbar of the same current
carrying capacity according to the requirements of the user.
The lap joints of the busbars are treated with a tin-tin process.

电器元件选择 /Electrical component selection
GGD柜主要采用国内已能批量生产的较先进的电器元件，同时也根据经济、合理的原则，在充分考虑可行性的前提下保留了部分可用的老产品如
DZ10D、DZ20等，不选用已淘汰的产品。
HD13BX和HS13BX型旋转操作式刀开关是GGD柜独特结构的需要而设计的专用的元件，它改变了机构的操作方式，保留了老产品的优点，是一种实用新型
的电器元件。
如设计部门根据用户需要，选用性能更优良、技术更先进的新型电器元件时，因GGD柜具有良好的安装灵活性，一般不会因更新电器元件造成制造和安装
方面的困难。
为进一步提高主电路的动稳定能力，GGD柜专用的ZMJ型组合式母线夹和绝缘支撑件。母线夹由高强度、高阻燃型PPO合金材料热塑成型，绝缘强度高、
自熄性能好、结构独特，只需调整积木式间块即可方便地组合成单母线夹或双母线夹，绝缘支撑是套筒式模压结构，成本低、强度高，解决了老产品爬电距
离不够的缺陷。
The GGD cabinet mainly adopts more advanced electrical components that can be mass-produced in China. At the same time, according to the principle of
economy and rationality, some of the available old products such as DZ10D, DZ20, etc. are retained under the premise of fully considering the feasibility.
The product.
HD13BX and HS13BX rotary rotary cutters are special components designed for the unique structure of the GGD cabinet. It changes the operation mode
of the mechanism and retains the advantages of the old products. It is a practical new electrical component.
If the design department selects new electrical components with better performance and more advanced technology according to the needs of users, the
GGD cabinet has good installation flexibility, and generally does not cause difficulties in manufacturing and installation due to the renewal of electrical
components.
In order to further improve the dynamic stability of the main circuit, the ZMJ type combined busbar clamp and insulation support for the GGD cabinet.
The busbar clamp is thermoformed by high-strength, high-flame-retardant PPO alloy material. It has high insulation strength, good self-extinguishing
performance and unique structure. It can be easily combined into a single busbar clamp or a double busbar clamp by simply adjusting the blocks. The
insulating support is a sleeve-type molded structure, which has low cost and high strength, and solves the defect that the creepage distance of the old
product is insufficient.

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