KYN28-12 Armored Removable AC Metal Enclosed Switch Equipments

La description

Ⅰ. General

KYN****2 (Z) indoor drawer style metal-clad switchgear is a set of power distribution device of rated voltage 3 to *2KV three-phase AC *0Hz of single bus bar and single bus bar segmental system. It is applicable to power transmission of the power plant, power receiving and distribution of the electric system and the substation of the industrial enterprises to fulfill the aims of control, protection and inspection.

This switchgear can meet the requirements of GB***6, IEC**8 and so on, which has the “five-prevention” functions of preventing the error operation of the circuit breaker, preventing the push-and -pull of the hand drawer on-load, preventing from switching the grounding switch with power on, preventing the power transmission of the grounding switch in grounding position and the power spacer to prevent error entry. This switchgear is truly a power distribution device with super performance, which can adopt VD4 vacuum circuit breaker from ABB Company or VS1 vacuum circuit breaker at home.

â…¡. Use condition

Environment temperature: **5℃ to **0℃

Relative humidity: daily average ≤*5%    monthly average≤*0%

Height above sea level: ≤***0m

Earthquake magnitude ≤8  

No fire, explosion danger, serious pollution, or chemical erosion occasion.

â…¢. Main characteristics

The structure of the cabinet is bolt by aluminum zinc alloy board after the process of CNC machine tool and multi bending technology;

All the operation can be done after the cabinet door is closed;

High protection degree, protect the intruder of sundries and pests;

Simple and effective “five-prevention” lock function, protect error operation;

Can adopt VS1 and CD4 vacuum circuit breaker;

Easy replacement of the circuit breaker and free exchange of the drawers;

The cabinet can be installed by the wall, maintenance in the front, which reduces the floor space;

Large space of the cable room can connect many cables;

The relay room and the cable room can respectively add a heater to avoid freezing or erosion.

â…¤. Instruction of the structure

The cabinet is composed of the fixed cabinet body and the drawable part (the drawers). The cabinet shell and the interval boards are all bolt with aluminum zinc alloy boards. The protection degree of the cabinet shell can reach up IP4X, and IP2X of each interval room.

The cabinet has the functions of overhead inlet and outlet, cable inlet and outlet and left-right contact. Arrange the scheme cabinets according to usage to compose a power distribution device which can fulfill the designed function.

The installation and the commission of the switchgear can be done in the front. The cabinet can stand by the wall to save the floor space and lower the investment.

1.      The cabinet body

The body and the interval boards of the cabinet are bolt by aluminum zinc alloy board after the process of CNC machine tool and multi bending technology, so that the cabinets assembled can guarantee the unity of the structure and the dimension. The aluminum zinc alloy board has the functions of corrosion resistance and oxidation resistance, and has the higher mechanical robustness than the ordinary steel board. The cabinet is divided to drawer room, bus bar room, cable room and relay instrument room by the interval boards with each unit grounding separately. The doors of the cabinet are all handled with the technology process of electrostatic gunning to make the surfaces have the advantages of anti-impaction, corrosion resistance, and beauty and so on.

2.      The drawer

The drawers can be classed to circuit breaker drawer, voltage transformer drawer, metering drawer, separation drawer and station used variety drawer according to different usage. The drawers with the same usage can exchange each other. The drawers have test/separating and working positions inside the cabinet, each position with an interlock unit to ensure the drawers can’t move freely in the above two positions.

3.      Circuit breaker drawer room

A special channel has been installed in the isolation room to provide the drawer to move. When the circuit breaker is moving between the test position and the working position, the separating valve automatically opens or closes to ensure that the operating staff can’t get in touch with the charged body. The drawers can be operated in the condition that the cabinet door is closed. The position where the drawer is inside the cabinet can be seen through the monitoring window, and any of the labels on the drawer can also be seen. All these guarantee the safety of the operating and the maintenance staff.

4.      Bus bar room

The main bus bar is lead from one cabinet to another cabinet and it is firmed by branch little bus bar and electrostatic contact box. It is fixed by bus bar bushing when it goes through the side wall of the neighbor cabinet.

5.      Cable room

Adequate cable room not only can connect many cables, but also can install current transformer, grounding switch and lightning arrester and so no.

6.      Instrument room

The internal plate and the panel of the relay room can install control and protection elements, the meter, the displaying instrument and the monitoring indicator and so on secondary elements.

7.      Interlock unit

The cabinet has a reliable interlock unit in accordance with the “five-prevention” requirement, which actually guarantee the safety of the operating staff and the device:

a. An attention and an alternation switch KK are installed on the room door to avoid the error switch on/off of the circuit breaker;

b. The circuit breaker can not move after switching on in working position to avoid the error pull or close of the separating contact;

c. The grounding switch can switch on only the drawer of the circuit breaker exits the cabinet and the drawer can not enter the cabinet at the same time (the grounding switch can match a voltage monitoring unit). The grounding switch can not switch on when the drawer is in the cabinet, thus fulfill the preventions of closing the grounding switch with power and closing the circuit breaker before the grounding switch is open;

d. The bottom door and the back door can not open after the circuit breaker entering the cabinet to avoid the error entry with power interval;

e. The drawer of the circuit breaker can switch off manually only without switching on when it actually is in test or working position and has no control voltage;

f. The secondary plug is locked and can not be pulled out when the drawer is in working position.

8. Grounding position

In the cable room, TMY*0*4 grounding bus bar has been set independently. This bus bar can go through every neighbor cabinet and can get a good connection with the cabin