Year1
- 额定电压：
- 12KV
- 额定电流：
- 630A
- 额定频率：
- 50HZ
Series vacuum circuit breakers are rated voltage, three-phase AC high-voltage indoor switching equipment. The product complies with the B standard. The overall structure of the product is that the switch body and the operating mechanism are installed as one or the switch body and the operating mechanism are installed separately. The one-piece structure is the basic type of split structure, which is suitable for various fixed switch cabinets, such as etc.
This product can be equipped with C-type DC electromagnetic operating mechanism and C-type spring energy storage operating mechanism.
Structural features:
This product is a special vacuum circuit breaker for fixed switch cabinets. It has its own operating mechanism. The operating mechanism is installed inside the frame and connected to the main shaft through a connecting rod. The operating mechanism ensures the main shaft rotation angle. for&&&. This product is installed in a sealed longitudinal magnetic field vacuum arc extinguishing chamber. The main shaft, opening spring, oil buffer and other components are installed inside the frame. The bottom surface of the frame is provided with mounting holes for circuit breaker installation. An insulator is installed on the rear plane of the frame, the upper insulator fixes the moving bracket, and the lower insulator fixes the static bracket. The rear ends of the dynamic and static brackets also serve as outlet terminals. The vacuum interrupter is installed between the dynamic and static brackets. The main shaft is connected to the vacuum interrupter through an insulating rod and a swing arm. There are also two insulating rods installed between the dynamic and static brackets to connect the two into a whole. Improved overall strength.
Usage environment:
) The ambient air temperature does not exceed +C, the lower limit is C,
b) The altitude does not exceed
c) Humidity, the daily average relative humidity does not exceed % of the monthly average Not greater than %, the daily average value of water vapor pressure is not greater than. , the monthly average value is not greater than.
) The surrounding air should not be significantly polluted by corrosive or flammable gases and water vapor
) There should be no regular strenuous exercise
) When the contactor is moving, The inclination angle between the installation plane and the horizontal shall not be greater than
). Any requirements exceeding the above conditions shall be agreed between the user and the manufacturer.
Arc extinguishing principle:
The circuit breaker is equipped with a vacuum arc extinguishing chamber, which has an extremely high degree of vacuum. When the moving and static contacts are charged and opened under the action of the operating mechanism, a vacuum arc will be generated between the contacts. At the same time, due to the special structure of the contacts, an appropriate longitudinal magnetic field is generated in the contact gap, allowing the vacuum arc to maintain a diffusion type and maintain a low arc voltage. When the current naturally crosses zero, the remaining ions, electrons and metal vapor can recombine or condense on the contact surface and shield in a time of the order of microseconds. The dielectric insulation strength of the arc extinguishing chamber fracture is quickly restored, thus The arc is extinguished and the purpose of breaking is achieved. Since this vacuum circuit breaker uses a longitudinal magnetic field to control the vacuum arc, it has a strong and stable ability to break current.
Maintenance and maintenance
During the normal use of the circuit breaker, the circuit breaker body should be properly inspected regularly. Clean the dirty and damp parts of the equipment surface, use a cloth to wipe the insulating surface, and then use Wipe off other dirt with the silk cloth adhered with cleaning agent (note that the cleaning agent used can be applied to plastic or synthetic plastic materials). Check the vacuum degree of the vacuum interrupter using the manual withstand pressure method. During the process of applying the withstand pressure, it is normal for there to be a weak glow outside the arc extinguisher. If continuous breakdown of the arc extinguisher is found, the vacuum extinguisher should be replaced.
When the circuit breaker is left for a long time, the active part of the circuit breaker may be blocked. The circuit breaker should be stored, closed and opened at least once a year.
.During installation and use, it is strictly forbidden to hit the vacuum interrupter with hard objects.
Users should not arbitrarily replace or use electrical components that are inconsistent with the original model specifications.
.The operator should have a preliminary understanding of the structure, performance, installation and adjustment of the circuit breaker and mechanism, knowledge of maintenance and repair, record problems during operation, and notify the manufacturer if necessary.
In places with frequent operations, attention should be paid to strictly controlling the number of operations and the number of interruptions specified by the technical conditions, and it cannot be continued to be used after the service life has been exceeded
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