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The LK-GLBS
is a SF6 gas load break switch. It consists of a puffer
rotary load break switch housed within a SF6 gas chamber enclosed by an outer insulating
shell. The airtight sealing of the shell is in the front area.
The LK-GLBS conforms to IEC 298 for switchgear which are sealed
for life. It also conforms to IEC 420 regarding load break switch
with fuses, IEC 265 regarding load break switches and IEC 129
regarding earthing switches.
Dielectric field distribution and leakages current between incoming
and outgoing terminals are controlled by large creepage distances,
bushings and by an internal earth grid to provide safety and protection
to service personnel.
The load break switch is mounted within the insulation casing
of epoxy resin. During the opening operation, the LK-GLBS interrupts
the current by the rotary and puffer action of the SF6 gas on
the arc.
The three positions of the switch are realised by rotating
the moving contact/air piston on a unic shaft.
The spring charged mechanism can be motorised. The LK-GLBS is
compatible with standard cable bushings and HRC fuses for 12 kV
and 24 kV applications.
|
MOVING
CONTACT / PISTON
It slides inwards as well as rotate during opening. When the moving
contact retracts, the SF6 gas within is pumped out and it strikes,
deionizes and extinguishes the arc. |
The switch is capable of interrupting currents up to 630A at 12
kV when operating without SF6, ie, in air.
The LK-GLBS can be fitted with fuse holders to function as a fuse
switch with tripping trigged by blowing of the fuses.
The LK-GLBS is arc-proof tested.The over pressure valve is integrated
in the structure of the shell and realises the arc proof function.
The LK-GLBS is a compactly designed switch that can be housed
in a panel by the dimensions of 370mm x 950mm x 1650mm (W x D
x H).
|
| External appearance of the GLBS |
| Apply voltage 50Hz/1min (kV) |
| Impulse test voltage (kV) |
| Breaking capacity of switch without
fuses (A) |
| No load transformer breaking capacity
(A) |
| No load cables breaking capacity (A) |
| Rated short-time current (kA/sec) |
| Mechanical life (C-O cycles) |
| Electrical life at nomimal current
(C-O cycles) |
| TECHNICAL DATA FOR LK-GLBS |
| No load line breaking capacity (A) |
| Short circuit capacity with fuse (kA) |
| LK-GLBS SF6 Load Break Switch |
| Load
Break Switch Products |
| Internal
layout of the LK-GLBS |
| Components
of the rotary puffer switch mechanism |
| About
MVC Division | LK-LBS (Air)
| LK-GLBS (SF6) | LK-VLBS
(Vacuum) |
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