SF6 Switch Technical Data:
1. SF6 switch type-------------------------------------------------------------------HPG-40.5
2.2. Rated voltage... .(kV)------------------------------------------------------------------40.5
2.3. Rated Currents:
2.3.1. Rated normal current (Ir), not less than ... ...(A r.m.s.)------------------------------630
2.3.2. Rated mainly active load-breaking current (pf 0.7) (I1), not
less than ... .(A r.m.s.)------------------------------------------------------------------------630
2.3.3. Rated closed-loop breaking current (pf 0.3) (I2a, I2b), not
less than ... .(A r.m.s.)------------------------------------------------------------------------630
2.3.4. Rated no-load transformer breaking current(I3), not less
than... . .(A r.m.s.)------------------------------------------------------------------------------4
2.3.5. Rated cable-charging breaking current (I4a), not less
than... . .(A r.m.s.)-----------------------------------------------------------------------------20
2.3.6. Rated line-charging breaking current (I4b), not less
than... . .(A r.m.s.)------------------------------------------------------------------------------2.0
2.3.7. Rated earth fault breaking current (I6a =3*I4a) not less
than... . ..(A r.m.s.)------------------------------------------------------------------------------60
2.3.8. Rated cable and line-charging breaking current under earth
fault conditions (I6b =1.73*I4a),,
not less than..(A r.m.s.)-------------------------------------------------------------------------34.6
2.3.9. Number of operations at mainly active load-breaking
current (I1), at least (pf 0.7) ... ---------------------------------------------------------------100
3.4. Short circuit ratings:
3.4.1. Rated short-time withstand current Ith (1 sec) (Ik), not
less than ... (kA r.m.s.)------------------20
3.4.2. Rated short-time peak withstand current (Idyn)(Ip =2.5*Ik),
not less than ..... . (kA peak)-------------------50
3.4.3. Rated short-circuit making current (Ima =Ip),
not less than-- (kA peak)------------------50
3.4.4. Number of operations at short-circuit making current
( Ima), at least-----------------5
3.5. Rated Insulation Levels:
3.5.1. Rated Impulse Withstand Voltage (BIL) (1.2/50 μSec0
3.5.1.1. Across isolating distance, not less than..(kV peak)
------------------180
3.5.1.2. To earth, between phases and across the open
switching device, not less than ... ...(kV peak)
--------------180
3.5.2. Rated one-minute, 50 Hz, Withstand Voltage
(Dry and Wet)
3.5.2.1. Across isolating distance, not less than...(kV r.m.s.)
------------------95
3.5.2.2. To earth, between phases and across the open
switching device, not less than ... ..(kV r.m.s.)
-----------90
3.5.3. Dielectric withstand tests of auxiliary and control circuits
3.5.3.1. Power frequency withstand voltage test..(kV r.m.s.)
---------2kV/1Minute
3.5.3.2. Impulse withstand voltage test ... ..(kV peak)
---------------5
3.6. Internal arc fault for at lease 8 kA (at 0.3 sec) (kA r.m.s.)
---------------------20/4
3.7. Medium Voltage (M.V.) Bushings
3.7.1. Creepage distance of the M.V. bushings, equal or greater
than (including tolerances) ---.(mm) -------------950
3.7.2. Material of M.V. bushings ...-------------Porcelain or
silicon rubber silicon rubber
3.7.3. Minimum distance between live parts of M.V.
Bushings..-(mm)----------------------360
4. Mechanical endurance..(no. of CO cycles)-----------------5000
5. Degrees of protection (IP) of the SF6 switch------------------IP66H;
40.5KV Outdoor SF6 Load Switch