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産業機器 ABB GSB 362のPDF テクニカル・マニュアルをオンラインで閲覧またはダウンロードできます。ABB GSB 362 20 ページ。 Transformer bushings

T R A N S F O R M E R B U S H I N G S T Y P E G S B T E C H N I C A L G U I D E

Fixed bottom contact

The fixed bottom contact (Cat. No. 1ZSC999002-AAE) uses
the same bottom contact as in the draw rod system, i.e. it is
made of copper in one piece and has 4 threaded holes for
cable lugs. The fixed bottom contact system also uses the
center tube as a current conductor but it is secured to the
center tube with a pulling ring instead of the draw rod. The
pulling ring is made of aluminium and is threaded on to the
center tube. The bottom contact is then fastened to the ring
with six M10 bolts, similar to the outer terminal. End-shield,
Cat. No. 1ZSC999003-AEA, is suitable for the bottom
contact. Type 2 bottom contact cannot be used with fixed
bottom contact.

Standard end-shield

The end-shield is made of aluminium and coated with
insulating epoxy paint or 3 mm of pressboard. The design
enables easy installation and should be used with standard
draw rod bottom contact, the fixed bottom contact system
and the adapter for the inner terminal.
Table 8. End-shield. Bottom contact type 1 (see Fig. 11) must be used
together with standard end-shield.
Cat. No.
Coating
1ZSC999003-AEA
Epoxy paint
1ZSC999003-AEB
3 mm pressboard

Conductor insulation

Draw leads must be insulated with vacuum oil-impregnated
insulating paper or equivalent, to give sufficient insulation
integrity. The paper insulation must be a minimum of 2 mm.
The paper insulation must be taken at least 30 mm inside
the end-shield hole.
10 Fixed bottom contact 1ZSC999002-AAE.
R296
R350
11 End-shield.
15
65 45
R9
∅142
R32
∅258
M12
(4x)
R25
80
265