ZW20A-12C type AC H.V. vacuum pole automatic controller is used in tri-phase electric system of AC 50Hz, rated voltage 12kV.

1. General description
    ZW20A-12C type AC H.V. vacuum pole automatic controller is used in tri-phase electric system of AC 50Hz, rated voltage 12kV. It can breaking and closing load current, overload current and short circuit fault current, as a device to control and protect electrical network. 
2. Main functions
   The controller is an intelligentized device, matches sectionalizer to reach distribution automation without other control system. Consist of circuit breaker (with mechanism operation), controller and control power, besides to opening of closing regular and fault current as circuit breaker, it can repeatedly auto reclosing by advanced setting times for sectionalizer to isolate fault circuits when the short circuit fault happen. The non-fault lines will resume power supply; if repeatedly auto reclosing failed, closing and interlock inside of the controller, another side of network, originally closing and interlock status will remove interlock and auto closing, non-fault lines resume power supply at once. The network automation could limit the power supply interrupted district into minimum range, it has high social benefit and economical benefit.
   The product is practical and reliable, multiple functional, the controller uses microprocessor, the panel shown in digital, conveniently with person-machine talking, all the parameters could be adjusted, new function of GPRS communication system could achieve opening, closing operation and teledata communication function by mobile phone, it can transmit lines parameters and running state of the equipment. 
   The product adopts ZW20A-12 type outdoor AC H.V. vacuum circuit breaker as noumenon, the noumenon switching adopts vacuum interrupter to arc extinguishing and SF6 gas to isolate, the case adopts gas sealed, isolation structure technic. No leakiness of internal filling gas, the spring mechanism operation promotes with miniaturization and performance optimization design, operation reliability is more advanced than domestic traditional spring mechanism. Main circuit is sealed inside the case, it has the advantage of anti-explosion, anti-condensation, anti-nasty, no influence by outside environment, it is the first choice on controlling and protecting for intelligent electrical network. 
3. Main characteristics
a. Main circuit and mechanism operation of circuit breaker are sealed in SF6 gas, no influenced by outside environment, reaches requirement of free maintaining and long life.
b. It completes a set with electronic controller, to realize remote-control, remote-supervision, remote-signaling, remote-adjusting function, to achieve electrical network intelligent control requirement.
c. New design of miniaturization electromotion spring mechanism, whole spare parts of the product reduced to Iowest level, increase the reliability and energy saving of circuit breaker.
d. Fixed with anti-explosion device at the top of case, to avoid leakiness of high temperature gas and splash even if accident occur, ensuring the safe and reliability for the product.

WENZHOU VACEM TECHNOLOGY CO.,LTD.