Description
8BK*8 ***2KV Series Metal-Clad Withdrawable Switchgear
The Medium-Voltage
Switchgear,type 8BK*8 is the latest Switchgear with the middle
installation developed by SIEMENS in the middle *0s,Inside circuit
Breakers SIEMENS 3AH series, with large current,high rupture, long
mechnical life span etc.Its structure is compact with perfect
performance.
The Vacuum Circuit-Breakers installed in
the Medium- Voltage Switchgear,type 8BK*8 is suitable
for:
â— Rated voltages from 6KV to
*2KV
â— Rated short-circuit breaking currents
up to *3KA
â— Feeder and busbar rated currents up to
***0A,***0A,***0A,***0A,***0A
Features:
The excellent design of 8BK*8 type ***2KV
metal-clad move-open switchgear fully displays such features as
safety, flexibility, compactness, small size, the displacement of
small movable carriage , and displays the new trend of the
designs.
Operating while the door is closed and
reliable interlock device ensure safety of the
operator
Programmed operating methods
The operation of switch-on and
switch-off
All the interlock device is mechanical. The
interlock controlled by the key may prevent false
operation
The 8BK*8 switchgear can ensure enough
electric strength , all bus sheets do not need to use other
insulating materials
With a life of being used for
more than *0,**0 times , a life of *****0 short circuit on and off.
The vacuum breaker is free of maintenance The operating mechanism
needs little maintenance
Flexibility of disposition
The 8BK*8 switchgear can be combined and
disposed conveniently and flexibly, which can meet many kinds of
requirements Vacuum small breaker carriage
Vacuum small contactor carriage Separation
carriage Voltage transformer carriage Carriage for the use of
substaion transformer Lightning arrester carriage
Grounding carriage The switchgear allows
wire-in and wire-out from the top or wire-in and wire-out from the
bottom
Cabinet body
The cabinet body is formed by a whole plate
, fixed by high strength rivets, it is hard to be out of shape, its
grounding continuousness is good, and its arc-resistance
performance is excellent;
The whole framework and the separation
plates are made of zinc plates coated with aluminum, which ensures
reliable grounding and long-term anti-corrosion ;the door, surface
and the sealing plates are powder coated with light gray which is a
standard color;
The carriages are supported by rails, they
can be easily pulled out or pushed in through rolling
bears
Vacuum breaker
The 8BK*8 switchgear adopts 3AH serial
vacuum breaker (ceramic arc-extinguishing chamber),which can meet
any requirement of *0KV distribution room.Its rated current is up
to ***0A.Short circuit switch-on and switch-off is up to *3KA,the
full capacity of the switch-on and switch-off is up to *0~**0
times,the mechanism life is up to *0,**0 times (max is up to *0,**0
times in special frequent occations);the 3AH breaker practical and
economical, specially designed for the Chinese electric network,
adopted the design of enlarging the creep distance and enhancing
insulating,it is maintenance-free, the reignition will not occur
when switching off / switching on the capacitor bank ,its power
frequency withstand voltage is *2KV,the peak of surge withstand
voltage is *5KV,thermal stability max current is up to *0KA/3s,the
air net distance of bare parts with electricity is more than **5mm;
its operating over- voltage is small. Therefore it is reliable and
safe.
