Ibyuma bya disikonta bya ZW32-12FGG/630A byo guhindura imashini zombi z'amashanyarazi, disikonta ya vacuum ifite izo ntambara zombi zo hanze y'ikigo (pole-mounted) ya 10KV.

ZW32 series double power supply circuit breaker is a high-voltage distribution equipment used to improve power supply reliability, mainly used in dual power supply systems with AC 50 Hz and rated voltage of 12kV or 40.5kV. Its core function is to automatically switch to another normal power supply when one power supply experiences a power outage or undervoltage, ensuring power supply continuity.

Main models and features

This series mainly includes models of two voltage levels:

ZW32-12 series: Rated voltage is 12kV. Common models such as ZW32-12GG/630 and ZW32-12FGG/630A, usually composed of a single high-voltage vacuum circuit breaker and double-side isolating switches, forming a double power supply automatic switching device. Some models adopt a "double isolation" design, that is, both the incoming and outgoing line sides are equipped with isolating switches and reliable interlocking devices, which is convenient for line inspection and maintenance and improves safety. The model integrates an intelligent controller (such as MG intelligent double power supply switching controller), with a watchdog function, which can realize intelligent management such as automatic fault isolation and load monitoring.

ZW32-40.5 series: Rated voltage is 40.5kV, suitable for 35kV systems. This model belongs to the "primary and secondary integration" pole-mounted switch, which deeply integrates the high-voltage vacuum circuit breaker body with the intelligent control unit (FTU), integrating protection, control, metering and communication functions.

Core functions and working principle

Automatic power switching: When the normal power supply fails, the device can automatically complete the switching with the standby power supply. Manual or selective switching can also be carried out as needed.

Protection and interlocking functions: It has protection functions such as short circuit and overcurrent, and also has an interlocking mechanism. When overcurrent is detected (for example, the current of the secondary side of the current transformer is greater than the set value), the device will perform closing locking and disconnect the currently operating vacuum switch, avoiding unnecessary re-power supply impact when the load fails. Intelligent models also have functions such as fault locking, PT disconnection locking, and switch position locking.

Intelligent management (some models): Models integrated with intelligent controllers can realize the following advanced functions:

Automatically eliminate single-phase ground faults in the user area, avoiding affecting the power supply of adjacent users.

Automatically isolate phase-to-phase short-circuit faults in the user area, and cooperate with the substation reclosing to quickly restore power supply in non-fault areas.

Quickly locate fault points, and support automatic reporting of fault information through communication modules.

Monitor user load, as a remote terminal with "three remote" (remote measurement, remote signaling) functions, which can be connected to a comprehensive management system.

Support multiple communication methods (cable, optical fiber, GPRS, etc.), and can be remotely connected to the automation system.

Structure and operation

The product structure usually includes a vacuum interrupter, current transformer, transmission mechanism and operating mechanism, etc. The operation methods support manual, electric, intelligent and permanent magnet types. During installation, care should be taken to avoid damage to the insulator due to force, and a double wrench should be used for tightening during wiring. The product requires regular maintenance, and it is recommended to check the wear of moving parts of the operating mechanism every three months, remove dust and add lubricating oil to the moving parts.

Application scenarios

This series of products are widely used in occasions with high requirements for power supply continuity, such as important facilities, urban distribution networks, rural power grids, industrial parks, etc. Its design has certain environmental adaptability, and can operate outdoors, in plateau areas and high-temperature and humid areas.

Ordering instructions

When ordering products, it is necessary to clarify: circuit breaker model, name, quantity; the model and control voltage of the matching operating mechanism; current transformer ratio; and the name and quantity of required spare parts.