Chengdu Outdoor Column Vacuum Circuit Breaker ZW7 Manufacturer Direct Sales

ZW7-40.5T not only has good sealing performance, but also cooperates with intelligent controllers to achieve remote control and automation management, and real-time monitoring of medium voltage overhead power grid units. Capable of handling all remote operations of a single overhead line switch.

This device is mainly used in medium voltage overhead power grids for the purpose of dividing and combining load currents, overload currents, and short-circuit currents.

The airtight insulation system composed of ceramic, glass or microcrystalline glass airtight insulation cylinder, moving end cover plate, fixed end cover plate, and stainless steel corrugated tube is a vacuum sealed container. In order to ensure airtightness, in addition to strict operating procedures in sealing, it is also required that the material itself has low breathability and internal air release.

Chengdu Outdoor Column Vacuum Circuit Breaker ZW7 Manufacturer Direct Sales

Composed of a fixed conductive rod, a fixed running arc surface, a fixed contact, a moving contact, a moving running arc surface, and a moving conductive rod.

There are roughly three types of contact structures: cylindrical contacts, transverse magnetic field contacts with spiral groove running arc surfaces, and longitudinal magnetic field contacts. At present, longitudinal magnetic field technology is used, and this type of arc extinguishing chamber has strong and stable arc breaking ability.
The shielding cover is an indispensable component in the vacuum arc extinguishing chamber, and there are various types of shielding covers such as the main shielding cover around the contact, corrugated tube shielding cover, and pressure equalization shielding cover.

The function of the main shielding cover is to:

Prevent arc products from splashing onto the inner wall of the insulation shell during the arc ignition process, thereby reducing the insulation strength of the shell.

Improving the uniformity of electric field distribution inside the arc extinguishing chamber is beneficial for reducing local field strength and promoting the miniaturization of vacuum arc extinguishing chambers.

The condensed arc products absorb a portion of the arc energy, which helps to restore the strength of the gap medium after the arc.
ZW7-40.5 Control Performance
Equipped with UPS function
Equipped with UPS function:

Communication can be switched on and off more than 50 times in case of power failure, ensuring normal operation within 48 hours;
Time limited protection function
The timed protection method follows the traditional three-stage current protection method (quick break, time limited quick break, overcurrent);
Anti time limit protection function
Inverse time protection is based on a fixed fuse curve for protection (the curve follows the national standard fuse curve);
Recloser function
Multiple reclosing functions can be performed according to a predetermined number of times;
Hand contact malfunction function
When a fault occurs during manual closing, the controller immediately disconnects and does not perform reclosing.
Surge prevention function
When the current is less than the surge current value set by the user during manual operation, the user will delay the set time to prevent surge current,
If the current is greater than the surge current value set by the user, surge protection will not be implemented.
If you do not need to activate this function, please set it to X in this menu, which will display as: OFF

The setting method for the surge prevention menu is the same as that for the overcurrent menu.
operative function
The recloser controller provides control panel operation functions, remote control operation opening and closing functions, as well as remote control and remote host operation functions.
LCD display function
Provide intuitive parameters for product tuning, setting, and viewing.
Event recording function
Can record 255 recent events.
memory function
Various data settings automatically enter the memory unit and are not lost for 10 years.
Remote signal detection function, with four remote communication functions
The current status of the detectable switch
Display automatic protection function
To protect the LCD without pressing any buttons, the display will automatically turn off after 3 minutes. Press any button to restore the display to the main screen.
Automatic backup power management function
To save backup power, the battery power will automatically turn off after 5 minutes without an external power source, and can be restored when needed;

Automatically recover after receiving a call.

Zero sequence protection function
When setting the zero sequence protection function, set the required size of the zero sequence power supply and the required zero sequence protection delay in the zero sequence menu.
If this function is not required, please set ACT and Alarm to X in the menu.

The setting method of zero sequence protection menu is the same as that of overcurrent menu.
When set to ACT, the zero sequence protection gate will lock, and when set to Alarm, it will sound an alarm but not lock.