Factory direct sales outdoor high voltage vacuum circuit breaker ZW7-40.5

额定电压：

40.5KV

额定电流：

630A

额定频率：

50HZ

&Overview:
The outdoor high-voltage vacuum circuit breaker is used in three-phase power systems with voltages of .
Main functions:
.Using vacuum arc extinguishing, strong breaking capacity, long electrical life, second mechanical life
.Simple structure, maintenance-free, long maintenance cycle
.Insulation Good performance and strong anti-pollution ability
. Can be equipped with spring or electromagnetic operating mechanism, reliable mechanical performance, and can be operated frequently without fire and explosion risks
. Built-in current transformer, the accuracy of the lecturer is up to . Realize three-phase interactive protection
. Built-in condensation controller can keep the circuit breaker operating reliably under a certain temperature and humidity.
Product usage:
Mainly used for the control and protection of outdoor power transmission and transformation systems. It is also suitable for normal operation and short-circuit protection of urban and rural power distribution networks and industrial and mining enterprises. The overall structure of the product is a porcelain bottle support type. The upper porcelain bottle is equipped with a vacuum arc extinguishing type, and the lower porcelain bottle is a support porcelain bottle. Suitable for frequent use occasions. It also has the characteristics of good sealing, anti-aging, high pressure resistance, non-combustibility, long service life, and easy installation and maintenance.
Operating environment conditions:
. Ambient air temperature: upper limit + degrees Celsius, lower limit Celsius
. Altitude does not exceed meters (if the altitude needs to be increased, the rated insulation level will be increased accordingly)
. Wind pressure: no more than (equivalent to wind speed/)
. Amplitude: earthquake intensity
. Pollution level: Level III
. Maximum daily temperature difference: no more than degrees Celsius.
Working principle of high-voltage vacuum circuit breaker:
.Conductive circuit principle
The current flows through the upper outlet terminal and is led to the static end and moving end of the vacuum arc extinguishing chamber&,& through the soft connection and current transformer Lead out to the lower outlet terminal.
.Principle of action
&The electromagnetic (or spring) operating mechanism starts the connecting rod to move the insulating pull rod (see item && in the figure) up and down, and starts the crank arm&& and the crank arm&& to rotate around the axis, so that The guide rod moves up and down to realize the closing and opening actions of the arc extinguishing chamber message contacts.
Product installation:
.&A solid foundation and necessary space should be prepared as necessary before product installation&,&If the user builds his own foundation or buried pole&,&The installation size and cable entry hole should be The installation dimensions shown in the figure are embedded bolts or reserved holes. If you use the over-the-counter bracket provided by our factory, you need to refer to the switch installation and foundation diagram and the foundation and embedded parts diagram.
b. When installing the product, use && nuts to secure the product to the foundation.
c. When wiring the main circuit, clean the overlapping surface of the terminals first (it has a silver-plated layer, and do not polish it with sandpaper) before connecting it to the external terminals. ,&See attached terminal diagram.
.&The secondary wiring enters through the cable entry hole at the bottom of the circuit breaker and is connected to the terminal block&(&The current transformer must be reliably connected to ensure that the secondary circuit is never in an open circuit state during operation&),&then connect the incoming wiring The holes are sealed to prevent dust and small animals from entering.
.&Use grounding bolts to reliably connect the grounding wire.