ZWB-12 Fixed sealed pole type high-voltage dual power switching deviceDetailed product description：

ZWB-12 fixed sealed pole type high-voltage dual power switching device (hereinafter referred to as high-voltage dual power) is an outdoor high-voltage distribution equipment with a rated voltage of 12KV and three-phase AC 50Hz. Mainly used for load current, overload current, and short-circuit current in dual circuit breaking and closing power systems. Suitable for protection and control in dual circuit substations and distribution systems of industrial and mining enterprises, and more suitable for urban and rural power grid construction, renovation, and frequent operation places.

Structural characteristics of ZWB-12 solid sealed pole type high-voltage dual power switching device

1. The circuit breaker adopts a three-phase solid sealed pole structure, which has the characteristics of stable and reliable breaking performance, no combustion and explosion hazards, no maintenance, small size, light weight, and long service life. 2. The circuit breaker adopts a fully enclosed structure with good sealing performance, which helps to improve moisture-proof and anti condensation performance, especially suitable for use in cold or humid areas.
3. The three-phase solid sealed pillar and current transformer adopt imported outdoor epoxy resin solid insulation, or adopt indoor epoxy resin wrapped organic silicon rubber solid insulation; It has the characteristics of high and low temperature resistance, UV resistance, and aging resistance.
4. The operating mechanism adopts a miniaturized spring operating mechanism, with low power of the energy storage motor and low energy consumption for opening and closing; The mechanism transmission adopts the true motion transmission method, with a small number of components and high reliability. The operating mechanism is placed in a sealed mechanism box, which solves the problem of rusting of the operating mechanism and improves its reliability.
5. The opening and closing operations of the circuit breaker can be manually or electrically operated, as well as remotely controlled. It can be matched with intelligent controllers to achieve distribution automation, and can also be combined with coincidence controllers to form automatic reclosers and sectionalizers.
6. Circuit breakers can be equipped with three-phase current transformers for overcurrent or short-circuit protection, and can also provide current acquisition signals to intelligent controllers; According to user requirements, measuring current transformers can be installed.
7. The circuit breaker is equipped with three-phase interlocking isolation switches on both sides, which have obvious visible fractures when the isolation switch is in the open state, and have anti misoperation interlocking devices with the circuit breaker body. The circuit breaker can only be operated when the isolation knife is fully closed or fully opened. Can be connected to lightning arrester post insulators for easy maintenance.

Environmental conditions for ZWB-12 solid sealed pole type high-voltage dual power switching device

Surrounding air temperature: upper limit+40 ℃, lower limit -40 ℃;
Altitude: Ordinary type not exceeding 2000mm, plateau type not exceeding 3500mm;
Wind pressure: not exceeding 700pa (equivalent to a wind speed of 34m/s);
Ice thickness: 10mm;
Seismic intensity: not exceeding 8 degrees;

High voltage intelligent dual power automatic switching function:
Measure the voltage on the A or B incoming line, determine the status of the circuit breaker and automatic isolation switch, and perform automatic switching; This device has overcurrent protection; Detecting the operating current at the load end, achieving timed overcurrent and quick break protection, with one-time reclosing and locking functions, with delayed closing for incoming power, and priority power supply function can be set. When the main power supply side is restored, it can automatically switch to that side for power supply. When there is no voltage on the incoming line, the vacuum circuit breaker will automatically trip, and the automatic isolation switch will not change direction. When any side is powered on first next time, it will automatically turn to that side, and the vacuum circuit breaker will automatically close. It can also be manually opened for maintenance, and the switch will be locked. The automatic isolation switch stops in the center to ensure electrical safety.

The main advantages of ZWB-12 solid sealed pole type high-voltage dual power switching device are:
1. Local control of switches
2. Remote control function
3. Fault detection of power lines
4. Line protection function
⑴ Current quick break protection
⑵ Overcurrent protection
⑶ Cold load startup protection (anti surge function)
⑷ Signal acquisition of switch body and non electric protection function with special requirements
5. Automatic backup function
⑴. No priority backup self switching: Both sides of the incoming power supply are mutually backup and provide equal power supply. When one side of the power supply loses power, the other side of the power supply actively switches on and off to each other
⑵ Priority backup self switching: Priority is set for both sides of the incoming power supply, and after the backup self switching is completed, the power supply side with higher priority is ensured to be in the power supply state
⑶ In case of overcurrent fault in the branch line, the backup automatic switching is locked
6. Local digital display
7. Event recording function
SOE recording: Record and maintain various important information that occurs on the line during power outage, with a resolution of 2MS. Accumulate up to 32 sets of SOE information and display them in a loop
8. Human machine interface function
Panel debugging port: can locally query and configure data through a PC computer
9. Self diagnostic protection function
⑴ Device self-test: Regular self-test of RAM FLASH UART A/D, etc. Any device malfunction will be indicated through terminal status and reported to the control center
⑵ Receive timing commands from the main or sub stations, synchronize with the system clock, and enhance the comparability of time recording