Products and Services >Medium Voltage Products >Circuit Breakers & Switches >Switch & Fusegear >SF6 Switches and Fuse-switches >GLBS-G12~24

GLBS-G12~24

The GLBS is a 12~24 kV SF6 load break switch which consists of a 3-position rotary switch with a pneumatic arc-quenching system, enclosed in a SF6 environment within an epoxy resin tank. The GLBS is available as a line switch (AL or BL) or a fuse-switch (BF) with fuse-holders as well as an operating mechanism with tripping capability. Terminals connecting to cables and bus-bars can be of the cone-shaped variety for accommodating silicone bushings on the cable or bus-bar system. Motorised operation is optional for the GLBS.

glbs2 GLBS-BF12

Parameters for GLBS-AL, GLBS-BL (Line switch)
Item Unit

IEC standards

GB standards
Rated voltage kV 7.2  12  15  17.5  24 12
Withstand voltage to earth and between points kV 20  28  36  38  50 48/42
Impulse withstand voltage to earth and between poles kV 60  75  95  95  125 85/75
Rated frequency Hz 50/60 50/60
Rated current A 630  630  630  630  630 630
Rated short-time current (lk)  -   tk=1s systems tk=3s systems (choice) kA (max.) kA 25  25  25  25  25 20  20  20  20  20 25
Making capacity kA (max.) 50  50  50  50  50 20
Electrical endurance times 500 50
Mechanical endurance times 5000
Temperature degrees C -5 to +55
Rated SF6 gas pressure (20 degrees C) MPa 0.025
Parameters for GLBS- BF (Fuse-switch, transformer protection)
Item Unit IEC standards GB standards
Rated voltage kV 7.2  12  15  17.5  24 12
Withstand voltage to earth and between poles kV 20  28  36  38  50 48/42
Impulse withstand voltage to earth and between poles kV 60  75  95  95  125 85/75
Rated frequency Hz 50/60 50/60
Rated current A 630  630  630  630  630 630
Rated short-time current (lk)  -       tk=1s systems tk=3s systems (choice) kA (max.) kA 25  25  25  25  25 20  20  20  20  20 25 20
Making capacity kA (max.) 50  50  50  50  50 50
Max. breaking capacity (transfer current) A 1700 at 12kV
Rated short-circuit breaking current (fuses) kA 31.5
Electrical endurance times 500
Mechanical endurance times 5000
Rated SF6 gas pressure (20 degrees C) MPa 0.03