I. Overview

VS1-12/630-20 vacuum circuit breakerThe indoor high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is a three-phase AC 50Hz, with a rated voltage of
Indoor high-voltage switchgear for 7.2-12 kV power systems, used as power grid equipment and power equipment for industrial and mining enterprises
The backup protection and control unit is suitable for places where frequent operations can be carried out. Having multiple disconnections and fast reloading
The ability to close the switch.

VS1-12/630-20 vacuum circuit breakerBy adopting an integrated design of the operating mechanism and circuit breaker body, it can be used as a fixed installation unit
It can be used as a standalone handcart in conjunction with a chassis vehicle.

2、 Product model and meaning

3、 Product based on standards

The circuit breaker complies with GB1984-1989 "AC High Voltage Circuit Breakers" and JB3855-1996 "3.6-40.5KV Household"
Internal AC High Voltage Vacuum Circuit Breaker ", DL403-1933" 10-3521KV Indoor High Voltage Vacuum Circuit Breaker Ordering Technology
According to the standard requirements of "Technical Conditions" and in compliance with the relevant requirements of IEC56 (87 publication).

4、 Environmental conditions for use

a) Environmental temperature

Maximum temperature:+40 ℃:

Minimum temperature: -15 ℃;


b) Environmental humidity:

Daily average relative humidity: ≤ 95%;

Monthly average relative humidity: ≤ 90%;

Daily average vapor pressure: ≤ 2.2 × MPa;

Monthly average vapor pressure: ≤ 1.8 × MPa;


c) Altitude; Not exceeding 1500m;

d) Seismic intensity: not exceeding 8 degrees;

e) The place of use has no dripping, no flammable or explosive hazards, no chemical corrosive gases, and no severe vibrations.

5、 Technical data

5.1 The main technical parameters of the circuit breaker are shown in Table 1.


Note: When the rated breaking current does not exceed 40KA, θ=0.3s

When the rated breaking current exceeds 40KA, θ=180s

5.2 The mechanical characteristic parameters of the circuit breaker are shown in Table 2.

6、 Product structure and working principle

6.1 Main structure
The main body of the circuit breaker is set inside an epoxy resin insulation cylinder cast using APG technology
The structure can effectively prevent the influence of external factors such as external impact and polluted environment on the vacuum arc extinguishing chamber.
The main body of the circuit breaker is installed at the rear of the circuit breaker frame and connected to the operating mechanism as a whole.

When the circuit breaker is in the closed position, the main circuit current path is as follows: (see Figure 2)

The upper outlet socket 27 is fixed on the bracket 26 of the arc extinguishing chamber and connected to the static contact inside the vacuum arc extinguishing chamber through the dynamic contact
The head and the conductive clip and soft connection connected to it, from the lower bracket 30 to the lower outlet socket 31.

The circuit breaker is equipped with dust-proof insulation cylinder covers for each current level when it leaves the factory. In actual use, the rated current
When operating at 1250A and below levels, there is no need to retrieve it. However, when operating at 1600A and above levels, it is necessary to retrieve it
remove.

6.2 Operating mechanism (see Figures 1 and 2)

Figure 1 Circuit Breaker Operating Mechanism Diagram


Figure 2 Internal Structure of Circuit Breaker


The operating mechanism is a spring energy storage operating mechanism, and the circuit breaker frame is equipped with a closing unit, consisting of one or more
The opening unit, auxiliary switch, indicator device and other components composed of a detachable electromagnetic coil are equipped with a closing and opening button at the front
Button, manual energy storage operation hole, spring energy storage status indicator, closing and opening indicator, etc.


6.2.1 Energy Storage

The energy required for circuit breaker closing is provided by the closing spring energy storage. Energy storage can be driven by an external power source
Machine completion can also be done manually using an energy storage handle.

Energy storage operation: carried out by the energy storage motor 16 fixed on the frame or by inserting the energy storage handle into the manual storage
Can rotate counterclockwise in the air. When using electric energy storage, the chain rotation system (14, 23
18) When manually storing energy, the sprocket rotation system is driven by the turbine and worm (11.13). When the sprocket 23 rotates,
Pin 2 pushes the slider 4 on wheel 6, causing the energy storage shaft 7 to rotate along and stretch the closing spring through the connecting arms 5 and 21
Energy storage. When reaching the energy storage position, the limit rod 3 on the frame presses down on the slider 4, which is the rotation system of the energy storage shaft and sprocket
Detach, the energy storage holding pin 9 presses against the roller 8 to maintain the energy storage position, and at the same time, the connecting plate 24 on the energy storage shaft drives the energy storage
Flip the sign 25 to display the "stored energy" mark and switch the auxiliary switch to cut off the power supply of the energy storage motor
The circuit breaker is in the ready state for closing.


6.2.2 Closing

In the closing operation, regardless of whether the "closing" button is manually pressed or remotely operated to make the closing electromagnet move
Both can make the energy storage holding shaft 19 rotate, causing the roller 8 to release and the closing spring to contract, and at the same time, through the lever 9
Arms 5 and 21 rotate energy storage 7 and cam 22 on the shaft, which in turn drives the linkage mechanism (34, 36, 37, 38
39) Drive the insulation rod 33 and the moving contact into the closing position, and compress the contact spring 32 to maintain the contact position
Need to come into contact with pressure.

After the closing action is completed, the closing holding pin 38 and the half shaft 41 remain in the closed position, while the energy storage indicator is displayed
Connect the power supply circuit of the reset motor for the auxiliary switch of the card and energy storage. If the external power supply is also connected, enter the energy storage again
Status: Pull the on/off indicator of connecting rod 44 to display the "on" mark. Rotate the connecting rod to pull the main and auxiliary switches
Switch.

When the circuit breaker is already in the closed state or a locking device is selected but not unlocked or manually operated
The circuit breaker cannot be closed during the pushing and exiting process.


6.2.3 Opening

You can press the "disconnect" button and reliably connect the external power supply to make the disconnect electromagnet or overcurrent trip current
The magnet action unlocks the switch holding pin 38 and the half shaft 41 to achieve the opening operation. There are contact springs and circuit breakers
The energy stored in spring 35 separates the dynamic and static contacts of arc extinguishing chamber 28. In the later stage of the opening process, the hydraulic buffer is used
Absorb the remaining energy during the opening process and limit the opening position.

Pull the on/off indicator with connecting rod 44 to display the "off" mark, and at the same time, pull the counter. Implement counter
Counting, driven by the transmission link to switch the spindle auxiliary switch.


6.3 Anti misoperation interlocking.

Circuit breakers can provide comprehensive anti misoperation actions.

6.3.1 After the circuit breaker closing operation is completed, the closing interlock bending plate 1 moves downward to hold the closing on the holding shaft
Bending plate 2 cannot be closed again when the circuit breaker is not opened.

6.3.2 After the circuit breaker is closed, how to control the internal anti tripping of the circuit breaker when the electrical signal is not removed in time
The road will be cut off and closed multiple times. (Optional)

6.3.3 When the handcart type circuit breaker is not in the test position or working position, the interlocking bending plate 3 is fastened to the closing bending plate 2
At the same time, cut off the closing circuit to prevent the circuit breaker from being in the closed state and entering the load zone.

6.3.4 After the handcart circuit breaker is closed in the working or testing position, it is pressed onto the locking plate of the mechanism by roller 5
6. The handcart will not be able to move, preventing it from pushing or pulling out of the load area in the closed state.

6.3.5 If electrical closing locking is selected, the closing operation shall be prevented without unlocking the locking device.

Note: The power of the closing locking device is 2.7W, and the working voltage range is 0.65-1.1 times the rated voltage.


6.4 Outline dimension diagram of circuit breaker

6.4.1 Outline dimension drawing of handcart VS1-12 (installed in a 680mm wide central cabinet)


6.4.2 Outline dimension drawing of handcart VS1-12 (installed in a 880mm wide central cabinet)


6.4.3 Outline dimension drawing of handcart VS1-12 (installed in a 1000mm wide central cabinet)


6.4.4 Fixed VS1-12 Outline Dimensional Drawing (800mm) Outline Dimensional Drawing


6.4.5 Fixed VS1-12 Outline Dimensional Drawing (1000mm) Outline Dimensional Drawing


6.5.1 Schematic diagram of internal electrical wiring for VS1-12 handcart


6.5.2 VS1-12 Fixed Internal Electrical Wiring Schematic Diagram



6.6 Matching dimensions between circuit breaker and cabinet

6.6.1 Recommended matching size diagram for circuit breaker and cabinet (680mm or 800mm wide)

a) Recommended matching size between VS1-12 (680mm) and cabinet (680mm)

b) Recommended matching size for VS1-12 (800mm) and cabinet (800mm)


6.6.3 Recommended fitting dimensions for VS1-12 (1000mm) and cabinet (1000mm) are shown in the following figure


6.6.4 Matching dimensions of dynamic and static contacts are shown in Figure 13


6.7 The assembly dimensions of the grounding device are shown in Figure 14 below


The schematic diagram of the external wiring of the intermediate transformer for phase A and C overcurrent outlet (secondary overcurrent 5A) is shown in the following figure


6.9 The schematic diagram of the external wiring of the intermediate transformer for three-phase overcurrent tripping (three-phase overcurrent 5A) of A, B, and C is shown in the following figure

7、 Installation and debugging

When lifting the circuit breaker from the packaging box, the hook should be hung at the clearly marked lifting hole on the circuit breaker,
When moving, the upper and lower wire arms should not be subjected to force, and the circuit breaker should not be subjected to significant impact vibration.

Note: Before the formal container entry operation, please remove the lifting device as required.

7.2 The circuit breaker has undergone strict factory inspection before leaving the factory, and all parameters meet the technical requirements. Primary circuit connection
The following preparations must be made before electricity.

a、 Check if the circuit breaker is damaged. If it is damaged, please stop using it

b、 Remove dirt, especially on insulation surfaces, as dirt caused during transportation or storage can affect
Product insulation performance:

c、 Manually operate the circuit breaker according to the regulations to store energy, close and open, observe the energy storage status
Is the opening and closing position indication normal

d、 Use the operating power supply to operate the circuit breaker for energy storage, closing and opening, and observe the energy storage status and closing and opening positions
Whether the indication is normal;

e、 Operate the handcart circuit breaker according to the following steps:;
Insert the push handle into the push hole, shake clockwise to advance, and counterclockwise to exit. Promote overall
Travel 200mm. In the open state, it should smoothly enter the working position or experimental position. Please rotate the handle at a medium speed
20 laps, when you hear a "click" sound, it is in place (avoid using too much force to damage the propulsion mechanism), and at the same time
The corresponding position indication (S8, S9) circuit is connected.


During formal operation, if the rated current is 1600A or above, please remove the insulation cylinder cover as required.

7.4 Conduct power frequency withstand voltage insulation test.

8、 Maintenance and upkeep

The circuit breakers produced by our company use specially designed sliding bearings, with special surface treatment and rust prevention technology, in combination with
Long term lubricating grease, under normal usage conditions, does not require maintenance for 10-20 years, but due to differences in usage environments,
Necessary inspections and maintenance work still need to be carried out.

8.1 Depending on the work environment, appropriate inspections should be conducted on the circuit breaker body within 6-12 months. After the appearance inspection, it is necessary to
Clean the dirty and damp parts on the surface of the equipment, wipe the surface of the insulation with a dry cloth, and then use a clean cloth to clean it
Use a silk cloth with cleaning agents to wipe away other impurities (note that all cleaning agents can be applied to plastic or synthetic plastic materials).

8.2 When the circuit breaker is left for a long time, it may cause blockage in the moving parts of the circuit breaker. The circuit breaker should be dealt with annually
Perform at least 5 energy storage and closing/opening operations.

8.3 Insulation tests should be conducted on circuit breakers at least once a year to determine if the vacuum arc extinguishing chamber of the circuit breaker is leaking
The decrease in insulation strength caused by gas or other external factors.

8.4 For frequent operating places, attention should be paid to strictly controlling the number of operations within the range specified by the technical conditions
Can continue to be used beyond its service life.

9、 Configuration

9.1 Secondary control voltage:


9.2 Locking device:

Function: To prevent closing when the secondary control power supply is not connected or below the technical requirements.

9.2.2 Overcurrent device:

Function: In case of overload or short circuit in a circuit, overcurrent relay is used to prevent overcurrent
The coil is energized, causing the circuit breaker to open. Usually added to phases A and C, but also to all three phases. when
When the secondary output capacity of the current transformer is sufficient, the indirect overcurrent release scheme is selected, which includes two options: 3.5A and 5A
When the secondary output capacity of the current transformer is not sufficient to provide the demand for overcurrent trip electromagnet, choose the medium
The overcurrent trip electromagnet on the transformer. (See Figure 14)


9.3 Grounding device:

According to the width of the circuit breaker cabinet, it can be divided into 680 screen grounding scheme, 800 screen grounding scheme, and 1000 screen grounding scheme
The specific grounding assembly dimensions for the plan are shown in Figures 13 and 14.


9.4 Table of electrical parameters of anime devices:

10、 Transportation, acceptance and storage

10.11 Transportation

When transporting a vacuum circuit breaker, it must be packed in a closed packaging box and fixed in place
Before placing the product, carefully read the text instructions and graphic symbols on the packaging box. When shoveling, pay attention to the center of gravity of the product and do not tilt it
Slant.

The packaging, unpacking, and storage should be done in a dry room, and the products and components should be checked
Is it complete and consistent.


10.2 Acceptance

Open the box indoors, check whether the random files are complete according to the packing list, and inspect the product nameplate and qualification
Whether the certificate matches the purchase order and whether the packing list matches the actual item.

Carefully remove the circuit breaker, clean the surface dust and dirt, and observe the product from the outside for any signs of damage,
Pay special attention to whether there are any signs of rupture in the vacuum arc extinguishing chamber.


10.3 Storage

Circuit breakers should be stored indoors in a dry, well ventilated, moisture-proof, shock resistant, and free from harmful gas erosion for a long time
Storage should be coated with lubricating oil on the transmission part, and the environment should be checked regularly to ensure compliance with requirements. The vacuum arc extinguishing chamber is allowed
The storage period is 15 years.

11、 Random file

aVS1-12/630-20 vacuum circuit breakerProduct Qualification Certificate

Factory Inspection Report for VS1-12/630-20 Vacuum Circuit Breaker

C Installation and Use Manual

D packing list

12、 Ordering Notice

Users should indicate when placing an order;

A circuit breaker model, name, and order quantity

B circuit breaker rated voltage, rated current, and rated short-circuit breaking current

C rated operating voltage

Name and quantity of spare parts and components

Users can select and configure according to the table below

Standard configuration: Includes anti bounce device (K0), no locking device (Y1+S2), no overcurrent device (Y7
Y8、Y9）， No grounding device.