user boundary vacuum load switch(FZW28-12F(FFK))

FZW28-12F(FFK) series user boundary vacuum load switch Summary: Consumers 10KV wire road, a T meet user feeder or its internal at fault, usually cause trunk lines and other adjacent user's power outage, investigation and statistics indicate that this affected accidents accounted for about 20 percent to 30 percent or higher proportion of the total accident networks. Due to the consequences, one is expanded outage scope, two is causing responsibility disputes. In the above user feeder T wiring place (responsibility boundary installing a user boundary load switch (known as the watchdog), is to solve the above problem of an ideal scheme spread accident. Main function characteristics: Built-in vacuum circuit breaker and isolation clearance, through the operator control double fracture close break-brake sequence. Zero sequence protection function: detected circuit zero sequence earth-fault, after setting the delay time within the controller, switch action, automatic break-brake. Alternate with short circuit protection: when lines appear when the fault alternate with, dividing lines witch in substation break-brake immediately after break-brake, separate the fault zone. User load monitoring: built-in measuring CT, after controller and communication system realize the user load monitoring. Telecommunication: embedded communication module, with "four wave" function, which can realize optic fiber and GPRS, CDMA and other communications functions. Straightforward operation: It could in no less than 30 range of ontology switch, switch romote controlling break-brake and reset. Ordering instruction: When ordering, should indicate product model, name, quantity and ratingsUsers should propose installation, choose corresponding fastening accessoriesThe user must choose corresponding functional configuration according to operating requirement.