Overview

The VX1 vacuum circuit-breaker is an ideal combination of the state-of-the-art embedded pole technology and the reliable modular design operating driving mechanism; the circuit breaker is having an outstanding electrical and mechanical performance. It is suitable for use in power distribution system in power plants, power distribution substations, infrastructure constructions, metallurgy, petrochemical and mining, the product can be used as the protection and control apparatus for loadings such as transformers, motors, capacitor banks as well as power transmission and distribution lines. This product is having an excellent performance in terms of operation reliability, long service life and low maintenance requirements, it's also designed with a reliable mechanical and electrical interlocking system to protect the operators and the safety operation of the equipment. The VX1 vacuum circuit-breaker is jointly designed by our very experienced circuit breaker experts inside and outside China, the product is of international technology leading position, with excellent safety and reliability performance. We have seriously consider the actual requirements of our domestic customers and therefore, our product can fulfill the actual requirements and operating conditions under different climatic condition and the applications in different industrial sectors.

In addition to our unique expertise in product design and product quality management, we are also experts in project management and customer services.

1.1 Technical advantage

- Vacuum interruption technology
- Vacuum interrupter embedded in the cast resin pole
- Reliable protection for the vacuum interrupter against mechanical shocks, dust and humidity
- Sealed-for-life poles
- Modular design mechanism
- Compact design
- Low or maintenance free
- VX1 Circuit breaker is suitable for both T650 panels and XuJi (Xiamen)'s SGC1 T600 switchgear panels.

1.2 Operating conditions

1.2.1 Normal operating conditions



1.2.2 Special operating conditions

Generally speaking, the special operating conditions as follows shall be taken into consideration:

To be installed over 1000m above sea level
- The external insulation strength will be de-rated;
- Or alternatively, select the apparatus specially designed for high altitude applications.

Ambient temperature
- For higher temperature (above 40℃), the rated current of the circuit-breaker will be de-rated or a ventilation fan has to be added to provide forced cooling for the circuit-breaker;
- For lower temperature (below -25℃), please make a special remark before placing an order. Indoor switchgear equipment generally shall not be operated in the environment with high humidity and/or rapid temperature changes; if such conditions can not be avoided:
- relevant preventive measures must be taken to avoid corrosion or other hazards;
- relevant preventive devices (e.g. panel heater) must be installed to avoid condensation.

1.3 Standards and approvals

The VX1 vacuum circuit-breaker comply with the GB/T 11022, GB 1984 and DL/T403 standards, and has undergone all required type tests. In addition, factory routine tests are conducted before the product is delivered to our customers, which guarantee the safety and reliability of the apparatus under the normal installation and operating conditions.

Product characteristics

2.1 Structure and installation methods

The driving mechanism of the VX1 vacuum circuit-breaker has adopts the modular design concept, and is equipped with embedded poles with the vacuum interrupter being casted inside the epoxy pole. All the poles are being mounted on the same metal frame which has ensured the mechanical connection accuracy between the driving mechanism and the moving parts inside the embedded poles. The VX1 circuit-breakers are available for both the fixed and withdrawable applications.

2.2 Poles

The VX1 vacuum circuit-breaker has adopts the most advanced epoxy resin embedded poles technology; the vacuum interrupter is cast inside the epoxy resin poles to protect the vacuum interrupter from external environmental and mechanical damages.


2.2.1 Vacuum interrupter

Vacuum circuit breakers require no quenching medium to cool and to deionize the arc. In fact, there is not any ionized material inside the vacuum interrupter. During the separation of the current carrying contacts, a metal vapor arc is created by the melting or explosive vaporization at the last metallic point of contact, while the contacts are separated further and the energy supplied is no longer be sufficient to maintain the arc, this will cause the arc current to be chopped prior to the natural current zero.

Vacuum is having a very good dielectric strength even with very small contact gap, arcing current can always be break successfully before the current zero when the contacts can be successfully separated. In addition, contacts surface will not be subject to oxidation or contamination as they are sealed in vacuum conditions.

Our VX1 vacuum circuit-breaker has used the vacuum interrupter produced by Beijing Orient Vacuum Electric Co., Ltd - the top-class manufacturer of vacuum interrupter in China, which provides the following benefits:


● Unique R-shaped contact with international patent:

- Outstanding breaking capacity, high reliability
- Low main circuit resistance which can effectively reduces temperature rise
- Can fulfill customers requirement on 100% full capacity breaking
- Hybrid design, require no special shaping of the contacts to direct the arc, therefore, gives a higher dielectric strength and stronger mechanical strength, it will not deform through the entire service life.

● The special curvature shape design of the vacuum interrupter, can lower the chance of cracking the embedded poles and lower the stress given to the vacuum interrupter by the epoxy poles.

● The advanced stainless steel hard-soldered process The stainless steel chamber lids are having very good tensile strength, ductility and impact resistance, which effectively relieves the stress generated by the epoxy poles after the casting process of the vacuum interrupter.

● Stable and high quality seal-brazing process gives extra-low leakage rate The top class ceramic insulator manufactured in aluminum oxide, provides high sealing and high tensile strength (no lower than 130MPa).

Product characteristics

2.3 Modular design driving mechanism


The VX1 vacuum circuit-breakers are with modular design operating mechanism, each functional module is independent from each other and require no additional linkage. The modules can be installed or removed individually.

● The spring charging/closing mechanism module and the opening mechanism module are mounted on the designated position of the drive housing by bolt, which can be installed and remove easily;

● The spring operation mechanism module can easily be installed and replaced, significantly reduce the repair and recovery time, thus improve the power supply reliability;

● The standard closing/opening functional modules are suitable for specialized mass production, which substantially improves the performance of the circuit breaker and shorten the delivery lead time;

● A high proportion of standardized spare parts can be used in the circuit breaker, allowing our end user customers to keep a low level of spare parts in order to lower their equipment maintenance cost and spare parts inventory level;

● The replacement of the mechanism modules will not affect the product performance and can be carried out by customer's maintenance personnel, there is no need for the customer to call for service from the manufacturer or shipping the equipment back to the manufacturer’s work for repair;

● The total numbers of mechanical parts is low, resulting in lower mechanical failures and improves product reliability;

● We have selected the most suitable material for all the moving/impacting parts for the circuit breaker and all the parts are with well controlled surface treatment, surface hardness and tensile strength are optimized to ensure the long mechanical endurance and mechanical operation reliability of the product`.

2.3.1 Spring charging/closing mechanism and opening mechanism modules

Spring charging/closing mechanism module: consisting of motor for close spring charging, transmission gearbox, spring charging cam, Build-in closing spring charging lever, electric/manual closing mechanism, etc.

Opening mechanism module: consisting of electrical/manual opening operating mechanism, operation counter, etc.

All the components of the modules are mounted on the two side walls, the two side walls are bolted together by three positioning fixing shafts. The modules are then fixed to the position fixing plate on the upper and lower part of the mechanical drive housing. This design can ensure all the components can be securely and accurately fastened to guarantee a stable mechanical movement and with highly interchangeable modules.



2.3.2 Driving mechanism module (transmission mechanism)

The driving mechanism module is directly installed onto the bottom part of the drive housing to ensure the fitting accuracy between the driving mechanism and the moving parts of the poles; The mechanical movement or mechanical force from the other modules are being transmitted to the driving mechanism module through the cam plates or pushing rods, there is no other mechanical connection parts among the modules, this require no extra mechanical adjustment, maintenance friendly and accuracy can be assure after repeated disassemble and installation.


Overall dimensions and technical data

3.1 Overall dimensions





3.2 Technical data*



3.3 Electrical accessories and characteristics

3.3.1 Releases Y2&Y3

The same shut releases are used for the closing and opening operation, the releases can be of AC or DC operation and can be activated by pulse of continues electrical control signal. This design is convenient for remote control of the circuit breaker. - Standard


3.3.2 Blocking magnet Y1

The operating mechanism can only be closed when the blocking magnet is energized. - Standard

3.3.3 Electronic control module

The electronic control module consists of the anti-pumping circuit and the rectifier bridges for the shunt releases and blocking magnet. This module provide electrical anti-pumping control and AC/DC shunt release functions. – Standard


3.3.4 Charging motor M

The charging motor will charge up the charging spring automatically; after each and every circuit breaker closing operation, the charging motor will charge up the closing spring immediately. 􂚶 Standard


3.3.5 Auxiliary switch S3

The auxiliary switch is used for controlling the power supply for the shunt releases and for the anti-pumping control circuit, contacts can be used to indicate the closing or opening status of the circuit breaker. The standard supply is with 5 NO and 5 NC contacts, however, we can provide up to 7 NO and 7 NC, but need to be specified when ordering. – Standard


3.3.6 Operation counter

The operation counter is used for counting the number of opening operations, it will count on each and every opening operation. – Standard


3.3.7 Earthing contact

Two earthing methods can be chosen for the circuit breaker truck. One is sliding clamps equipped on both sides of truck contact with earthing bar on the guide rails of switchgear panel. The other earthing method is copper bar on the bottom of the truck engage in earthing bar of the switchgear panel. Both methods could reliably earth the withdrawable circuit breakers. Customers can choose either of them.


3.3.8 Undervoltage release Y4

When the supply voltage is out or below 35% of the rated voltage, the undervoltage release will be operated to open the circuit-breaker, at the same time, power supply to the blocking magnet will be out, the circuit breaker cannot be closed until the supply voltage is recovered. - Optional

Electric wiring diagrams





Product quality and environmental protection

The VX1 vacuum circuit-breakers are manufactured in accordance with the following international standards covering quality management system ISO 9001 and environmental management system ISO14001, which represents the most stringent requirements on quality certification and environmental management.

During the end of the product life cycle:
- Strictly follow the relevant laws and regulations as well as the requirements as stipulated in environmental management system ISO 14001.
- We highly promote the recycling of materials.
- Strictly conform to the local laws and regulations for material recycling and disposal.

Recycling of materials:
Please refer to the following tables to handle the different material types, way to handle disposed material can be of incineration or land filling.