● Function
It is used for transformer protection.
This unit usually equips with a three-position load switch with SF6
insulated performance (CKFL-S), a set of fuse and a set of
auxiliary earthing switch. It has the double spring operating
mechanism which with the function of automatic tripping for fuse
fusing. Only when the load switch is at the position of earthing,
operator can access cable compartment. Its position indicating
device meets the standard of IEC60129A2 (1996) and relevant
national standards. Operator can check whether the switch is in
opening / earthing status from the watch window of low voltage
compartment. Meanwhile, the operator can also check the cable
connection and fault indicator from the watch window of the
enclosure front door when device operates. (If selected this parts)
● Standard Feature
Upper part of the unit
---- three-position load switch
---- operating mechanism
---- enclosure for busbar compartment
---- integrated low voltage compartment
---- interlocking device
---- fuse tripping device with capacitive voltage indicator
---- busbar
Lower part of the unit
---- earthing switch
---- fuse base
---- enclosure for cable compartment
---- bottom plate for cable support brackets
● Optional Feature
---- integrated capacitive voltage indicator or inserting interface
for portable capacitive voltage indicator
---- auxiliary contact for each position : 2pcs always opening +
2pcs always closing
---- electric operating mechanism
---- current transformer
---- voltage transformer
---- channel for cable controlling
---- channel for pressure releasing
