The YKD-12GD series integrated vacuum Circuit Breaker is a new generation of indoor miniaturized distribution equipment used in~12KV, three-phase AC 50Hz distribution systems. Mainly used for power distribution systems such as photovoltaics, wind power, industrial and mining enterprises, and urban complexes in residential areas. Its xed, compact, integrated, and modular characteristics make it paicularly suitable for use in small and restricted installation locations (distribution rooms, prefabricated substations, underground garages, etc.). e minimum width of a single cabinet in a 10kV system is 550mm and it can be fully maintained in the front.

The YKD-12GD series integrated Vacuum Circuit Breaker has excellent electrical and mechanical peormance, reliable and stable mechanism, and long seice life. e Feng circuit adopts an integrated Pole, which improves the environmental adaptability and Insulation reliability of the circuit breaker. Reliable mechanical and electronic peormance, extended mechanical and electronic lifespan, make maintenance free circuit breakers possible. As a protection and control unit for power grid equipment and industrial and mining enterprise power design, it is suitable for various types of loads and frequent operations, as well as situations where sho-circuit currents are disconnected multiple times. e product has complete mechanical and electrical interlocking devices, with extremely high operational stability and reliability, ensurig the safety of operators and equipment and ensuring electrical safety.

  1.Model and meaning

2.Product Features

Adopting integrated pole technology.

The product adopts a modular design: a framework structure that integrates isolation switches, Vacuum Circuit Breakers, grounding switches, interlocking mechanisms, and operating mechanisms into a high-peormance miniaturized high-voltage electrical product.

The minimum cabinet width can reach 550mm, and various specications such as 600mm and 800mm can be customized according to user needs, with exible solutions.

Rotary isolating switch with visible fracture after opening.

There is a mandato mechanical interlock between the isolation switch, circuit breaker, and grounding switch to prevent misoperation.

The circuit breaker adopts a modular operating mechanism, which can be independently replaced or maintained, and has good interchangeability. It can be operated manually or through AC/DC energy storage to achieve remote control.

The cabinet door and grounding switch are designed with a reliable interlocking structure to ensure the safety of operators.

Surrounding ambient temperature: -25 ℃+40 ℃

Relative humidity: daily average ≤ 95%, monthly average ≤ 90%

Altitude: not exceeding 1000m

Seismic intensity: not exceeding 8 degrees

Place of use: No explosion hazard, chemical and severe vibration, and contamination

Usage conditions for altitude>1000 meters

Note: The above are the environmental conditions for the use of conventional conguration switches. If you need to operate in special environments (such as high altitude, strong salt spray, extreme heat and cold), please contact our company.

3.Main technical parameters

4.Integrated vacuum circuit breaker operation panel

5.Standard conguration

Connect according to the standard wiring schematic, including anti trip device, no locking device, no overcurrent device, and no undeoltage device.

6.Interlocking of circuit breakers, isolating switches, grounding switches, and cabinet doors

The isolation switch and grounding switch are mechanically interlocked with each other, and they can only be combined into one and cannot be closed at the same time;

After the grounding switch is opened, the isolation switch can be closed; After the isolation switch is closed, the grounding switch cannot be closed.

When the closing lock is in the locked position, the circuit breaker can only be closed, and the isolating switch and grounding switch cannot be operated.

When the closing lock is in the unlocked position, the circuit breaker cannot be closed, and the isolation switch and grounding switch can only be operated.

After the circuit breaker is closed, the closing lock cannot be unlocked, and the isolating switch and grounding switch cannot be operated.

The cabinet door can only be opened after the grounding switch is closed.

The grounding switch can only be opened after closing the cabinet door.

7.Operation of closing and locking

Atresia

Rotate the outer ring of the locking operation shaft 90 ° (release positioning) towards the locking direction, push to the limit 

position, and then rotate the outer ring of the operation shaft 90 ° (positioning).

Unlock

Rotate the locking operation shaft outer ring 90 ° (release positioning) towards the unlocking direction, push to the limit position, and then rotate the operation shaft outer ring 90 ° (positioning).

8.Operation of circuit breaker

Manual operation

   1. Using dedicated energy storage rods for energy storage,

   2. Closing: Press the closing button. (If equipped with a closing lock or undeoltage device, the seconda circuit must be energized     before closing.).

  3. Opening: Press the opening button

Electric operation

   1. After the seconda circuit is powered on, the energy storage mechanism automatically stores energy.

   2. Closing: Press the closing button in the control circuit.

   3. Opening: Press the opening button in the control circuit.

9. Operation of isolation switch

Clockwise direction is the closing of the isolation switch.

The counterclockwise direction is the opening of the isolation switch.

Closing the cabinet door automatically unlocks the lock between the cabinet door and the grounding switch.

After the grounding switch is closed and the cabinet door is opened, the grounding switch automatically locks and cannot be operated.

10.Outline installation dimension diagram of circuit breaker (formal dimension diagram)

11. Outline installation dimension diagram of circuit breaker (invedžed dimension diagram)

12.Main body of structure

The VZN88-12 series cabinet body is made of 2.0mm thick aluminum zinc plate material, which is formed by CNC machining. e 

various components of the cabinet body are assembled using bolted and willow joint processes. e cabinet door is made of high-quality steel plate processed and formed, and then sprayed with plastic. e color can be customized according to user needs. e cabinet mainly consists of a main busbar room, a switch room, and an instrument room.

Main busbar room

The main busbar room is mainly equipped with three position isolation switches. The main busbar is installed at the upper end of the isolation switch and connected to it. The real-time position and fracture condition of the isolation switch can be obseed 

through the obseation window in the instrument room.

The busbar adopts a longitudinal arrangement of rear, middle, and front, which is ve convenient for connecting with integrated circuit breakers, Load switches, or combined electrical systems. The cabinets, main busbar rooms, circuit breaker cable rooms, and instrument rooms are all equipped with metal or insulating material paitions and wall sleeves to isolate each other and prevent the spread of accidents.

Switchgear room

The circuit breaker cable room adopts co room installation, mainly equipped with circuit breakers, grounding switches, transformers, lightning arresters, branch busbars and other products.

It has the characteristics of small size, high integration, and easy maintenance and repair. The busbar is arranged longitudinally at the back, middle, and front, and the integrated circuit breaker equipped with it unies the isolation switch, circuit breaker, and 

grounding switch interlocking machine, making operation more convenient and reliable.

13.Cabinet schematic diagram

14.Cabinet Chain

The switchgear can be equipped with a program lock to achieve mechanical interlocking between cabinets. Only switches with keys can be closed, and the key cannot be removed after closing;vice versa. Generally, three switches are paired with two keys, and a maximum of two switches can be closed with three switches. Two switches are paired with one key, and only one switch can be closed.

15.Transpoation and Storage

When the switch is xed on the bottom plate, it can be transpoed by another vehicle. If it is not xed on the bottom plate, the switch cabinet should be lifted.

Switches are strictly prohibited from being stored outdoors. Switches that have been stored for a long time should be stored in a dry, ventilated, and non corrosive indoor warehouse. e outer packaging of the switch is generally not more than 1 year old.

16.Pre operation inspection

Before using the switch, the following checks must be conducted for personal and equipment safety:

Check if the bolts and nuts are tightened;

Check if the main circuit and grounding circuit are connected correctly;

Check whether the mechanical interlocking is correct and reliable;

Check whether the operation of the isolation switch and circuit breaker in the switchgear is exible and correct;

Check if the connection of the high-voltage cable is correct and reliable.

17.Daily patrol

Daily inspection of switches should be carried out, including:

Are the indicator lights and live indicators functioning properly;Is the seconda instrument reading normal;

Is the switch position indication normal

Are there any other abnormal phenomena.

18.Regular maintenance

It is recommended to conduct a comprehensive maintenance once a year, which includes the following contents

Are the indicator lights and live indicators functioning properly 

Is the seconda instrument reading normal;

Is the switch position indication normal;

Are there any other abnormal phenomena.

19.Ordering Instructions

Product Name, Model, Prima Scheme Diagram, Quantity

The model, specication, name, and quantity of the main electrical components inside the cabinet;

Layout plan and arrangement diagram of the cabinet;

Specication and material of the main busbar, and specication and material of the branch busbar

If there are special requirements for cabinet color, negotiate with the manufacturer (generally according to the usual or reference manufacturing standards)

Other special requirements.

20.Safety Tip

Switchgear can only be installed in indoor locations suitable for electrical equipment operation.

Ensure that installation, operation, and maintenance are carried out by dedicated electrical personnel.

It is necessa to ensure the applicability and safety of the connection conditions and working procedures of the on-site electrical equipment.

All operations related to switchgear must comply with the corresponding regulations in the manual.

Do not exceed the load specied in the technical parameters of the switchgear under normal operating conditions.

The dedicated personnel of the user shall be responsible for all matters that aect work safety and properly manage the switchgear

If there are any fuher questions about this manual, we would be happy to provide fuher information.

Working principle of circuit breaker