KYN28-12(GZS1-12) Indoor AC Metal-clad Withdrawable Indoor Switchgear

（户内交流金属铠装抽屉式户内开关设备）

KYN28A-12(GZS1 -12) Indoor AC metal-clad withdrawable switchgear (Hereafter referred to as"switchgear") is an advanced medium voltage switchgear, developed by Xi'an Senyuan corporation. We had developed the miniaturization withdrawable switchgear cabinet of 650width based on their technologies. It is suitable for the applications in three-phase AC electric power system with rated voltage of 12kv and rated frequency of 50Hz, for the acceptance and distribution of the power, and also provides control, protection, and monitor of the circuit. Technical transferred is also provided by the same corporation

KYN28A-12(GZS1 -12)户内交流金属铠装抽出式开关设备（以下简称“开关柜”）是西安森源公司研制的一种先进的中压开关设备。 我们在他们的技术基础上开发了650宽的小型化抽出式开关柜。 适用于额定电压12kV、额定频率50Hz的三相交流电力系统中，作为电能的接受和分配之用，并对电路起控制、保护和监测作用。 技术转让也由同一公司提供

1. Applicable Standards 适用标准：

GB3906-2006: AC metal-clad closed switchgear and control equipment 3.6kV-40.5kv

GB3906-2006: 交流金属铠装封闭开关设备和控制设备3.6kV-40.5kv

GB11022-1999: General technical qualification of high-voltage switchgear and control equipment

GB11022-1999：高压开关设备和控制设备通用技术条件

IEC62271 -200/2003: AC metal-clad close switchgear and relevant control equipment with rated voltage between 1 kV and 52kv

IEC62271 -200/2003：额定电压1kV至52kv交流金属铠装封闭开关设备及相关控制设备

DL/T404-2007: AC metal closed switchgear and control equipment 3.6kV-40.5kv

DL/T404-2007：交流金属封闭开关设备和控制设备3.6kV-40.5kv

2.Type of the Product and Their Indications  产品型号及解释

                                                           VS1 indoor vacuum circuit breaker (front and side view)                                                                  VS1户内真空断路器（前视图和侧视图）

3.Structure overview 结构概览

The switchgear is designed according to GB3906 metal-clad closed switchgear. It composes of a main body enclosure and a withdrawable component (called handcart). The enclosure is divided into four separate rooms. The protection lever of the shell will be IP4X, and if the door of separate room or breaker room is open, then the protection lever should be IP2X. There are several functional schemes such as overhead inlet and outlet overhead line, inlet and outlet cable, forming a whole electric power distribution system device. This switchgear can be installed, commissioned and maintained from the front, which makes it possible to be arranged as back-to-back, side-to-side, or against the wall.

该开关柜按GB3906金属铠装封闭开关设备设计。 它由主体外壳和可抽出部件（称为手车）组成。 外壳分为四个独立的房间。 外壳的防护杆为IP4X，如果隔离室或断路器室的门打开，则防护杆应为IP2X。 有架空进出线架空线、进出线电缆等多种功能方案，构成整个电力配电系统装置。 该开关柜可从正面安装、调试和维护，可背靠背、并排或靠墙布置。

4.1 Shell and auxiliary外壳及附件

The main body enclosure formed by import zinc steel plate coated with aluminum, double-bented by CNC machine. Owning to this advance process, the cabinet gains less weight, higher mechanical strength and more artistic outward appearance compared with other products, as well as the advantage of higher precision, strong anti-corrosion and anti-oxidation capacity. The cabinet adopts assembling configuration. It is connected with high intention nuts and bolts, thus the process manufacture period is shortened, while occupying less area, the components are highly optimized for general use, so it is easier for organization.

主体外壳采用进口锌钢板涂铝而成，经数控机床双弯折弯而成。 由于采用先进的工艺，箱体比其他产品具有重量更轻、机械强度更高、外观更美观、精度更高、防腐抗氧化能力强等优点。 柜体采用组装式结构。 采用高强度螺母和螺栓连接，缩短了工艺制造周期，在占地面积较小的同时，部件高度通用化优化，更易于组织。

4.2 Handcart手车

The framework of handcart, alike the cabinet, is formed by steel plate, and processed by CNC machine. The handcart is insuloted from the cabinet when combined. The mechanical interlock is safety, reliable and flexible. Based on the different usage, there are circuit breaker handcart, potential transformer handcart, measure handcart and separate handcart. All kinds of handcart can be organized on basis of modulus. The same type of handcart can be replaced. In cabinet, handcart may be at break position, testing position, or working position, each one has its own locating device to ensure reliable interlock followed by the operation procedure to prevent interlock disoperation. All handcarts are fixed by nut or spindle, so the operation is convenient and flexible for all operators. The handcart can be easily drawn out from the cabinet for inspection and maintenance. Due to the withdrawable adoption, it saves space and is easily to be inspected and repaired.

手车的框架与柜体一样，都是由钢板成型，并通过数控机床加工而成。 手车组合时与柜体绝缘。 机械联锁安全可靠、灵活。 根据用途不同，有断路器手车、电压互感器手车、测量手车和分离手车。 各种手车均可按模数组织。 可更换同型号手车。 柜内，手车可能处于断开位置、测试位置或工作位置，每个位置都有自己的定位装置，以保证可靠的联锁，并遵循操作程序，防止联锁误动作。 所有手车均采用螺母或主轴固定，操作人员操作方便灵活。 手车可方便地从柜内抽出，以便检查和维护。 由于采用抽出式，节省空间，便于检查和维修。

4.3 Separate room 独立腔室

Each main electric unit has a separate room, that is, circuit breaker handcart room, busbar room, cable room and relay control room.All the rooms can achieve IP2X protection level. Except for the relay control room, the other three separate rooms are equipped with a release pathway. Owning to the withdrawable type, the increased cable room enable the multiple cable are connected.

每个主电气单元都有独立的房间，即断路器手车室、母线室、电缆室和继电器控制室。所有房间均可达到IP2X防护等级。 除继电器控制室外，其余三个独立房间均设有释放通道。 由于采用抽出式，增加了电缆室，可以连接多根电缆。

4.3.1 Circuit breaker room断路器室

There is one slide guide at each side of the circuit breaker room for the handcart [15] to move from breaking position or testing position to operation position. The separator (Valve) [13] of the static contact [6] is installed on the back of the handcart room. When the handcart [15] is moving from the breaking or testing position to the operation position, the up and down valves of the static contact connecting with the handcart would be open automatically. On the contrary, when moving opposite to cover the static contact, the valves would close automatically. Since the up and down valves could be operated separately, the operator would not touch the live parts during the maintenance while the live parts are separated. When the circuit breaker room is closed, the handcart can be handled as well. Moreover, the handcart status and the energy storage can be monitored through the middle inspection window.

断路器室两侧各有一个滑轨，供手车[15]从分断位置或试验位置移动到操作位置。 静触头[6]的分离器（阀门）[13]安装在手车室的背面。 当手车[15]从分断或试验位置移动到操作位置时，与手车连接的静触头的上下阀门自动打开。 反之，当反向移动覆盖静触头时，阀门自动关闭。 由于上、下阀门可以单独操作，在带电部件分开的情况下，操作人员在维修时不会接触带电部件。 当断路器室关闭时，手车也可搬运。 此外，还可以通过中间的观察窗监控手车状态和储能情况。

4.3.2 Busbar room母线室

The main busbar [4] in Figure 4, is consist of single busbar and fastened by branch busbar [2] and static contact box [6]. The main busbar [4] and interbus are rectangular cross section copper busbar which are used for large current load by double busbars. The branch busbar is connected to the static contact box [6] and main busbar [4] through bolt. For special requirement, the busbar can be wrapped with heat-shrinkable bushing, link bolt insulation sleeve and end cap. Adjacent busbars are fixed with bushing [3]. If there is an Internal fault arc, the space between the busbar can be used as air buffer to prevent from melting. Thus the bushing [3] is quite necessary to ensure the safety and stops the accident spreading to other parts.

图4中的主母线[4]由单母线组成，并由分支母线[2]和静触头盒[6]紧固。 主母线[4]和间母线为矩形截面铜母线，采用双母线用于大电流负载。 分支母线通过螺栓与静触头盒[6]和主母线[4]连接。 若有特殊要求，母线可采用热缩套管、连杆螺栓绝缘套和端盖缠绕。 相邻母线用套管 [3] 固定。 如果出现内部故障电弧，母排之间的空间可作为空气缓冲，防止熔化。 因此，套管[3]对于确保安全并阻止事故蔓延到其他部件是非常必要的。
4.3.3 Cable room电缆室

The cable room has a large space since the switchgear employs mid-set switch type. The current transformer [7] and earthing switch [8] are installed on the back of the room, and arrester [10] is on the bottom back of the room. The workers could access the inner cabinet for installation and maintenance by moving away the handcart [15] and withdrawable horizontal plate [17]. Cables in the Cable room are connected to the conductoi Each phase can be linked with 1 to 3 single cores cable, or 6 single cores when necessary. The removable non-metal panel or non-conductive metal plate is equipped to ensure the construction conveniently.

开关柜采用中置开关型式，电缆室空间大。 电流互感器[7]和接地开关[8]安装在房间背面，避雷器[10]安装在房间背面底部。 工人通过移开手车[15]和可抽出的水平板[17]即可进入内柜进行安装和维护。 电缆室电缆与导线连接，每相可连接1～3根单芯电缆，必要时也可连接6根单芯电缆。 配备可拆卸的非金属面板或不导电金属板，保证施工方便。
4.3.4 Relay Control room继电控制室

The relay control room is equipped with relay protection device, instrument, powered monitoring indicator and specialized secondary equipment. All the control lines are placed in the trunking with enough space and covered by metal plate, isolating the secondary line from HV chamber. The left side trunking is used for reserved circuit lines incoming or outgoing. Lines internal from the switchgear itself are placed in the right trunking. On the top of the relay control room plate, there is a reserved little hole for busbar installation. Moreover, the top plate can be turned over for busbar installation.

继电控制室设有继电保护装置、仪表、动力监控指示器及专用二次设备。 所有控制线均放置在有足够空间的线槽内，并用金属板覆盖，将二次线与高压室隔离。 左侧线槽用于预留电路线进出。 开关设备本身的内部线路放置在右侧线槽中。 继电器控制室板的顶部预留有用于安装母线的小孔。 另外，顶板可翻转进行母线安装。