2014 New Design Electrical Junction Boxes

Meet reliability requirements for high tension and construction projects, such as construction of urban and rural power grids, subway, light rail, high-rise buildings, such as the plateau substation construction projects, but also in the environment, especially for poor areas and serious contamination of the industrial zone substation .

Main features: SF6 gas insulated low-pressure, high-pressure live sealed or closed, and the separation of the two chamber, high-pressure components from environmental conditions affect the main switch using a vacuum circuit breaker; with isolation with three-position switch; sealed box from thin stainless steel, welding and air tightness; allocated by solid wall insulation bus, the scene does not involve the installation of the SF6 gas deal with the inner cone or prefabricated, Cone inserted cable feed using current and voltage sensors or current transformer and voltage Transformer; with Plug-ZnO with arrester; have an electrical and mechanical interlocking chain.

Main technical parameters

Rated Voltage: 40.5 kV

Rated frequency: 50 kV

Current Rating: A 1250

Rated insulation level: 1 min frequency tolerance voltage: 95 kV; Impulse tolerance voltage: 185 kV

Rated current short-term tolerance: 25 kA

Rated current peak tolerance: 63 kA

Rated short duration: 4 s

Breaking rated short circuit currents: 25 kA

Rated closing short circuit current (peak): 63 kA

Points, closing the loop devices and assistive rated supply voltage: DC110 DC220 AC220V

GIS rated pressure (20 ℃): 0.04 MPa

Dimensions (W × H × D): 800 × 230 × 1570mm