Maintenance Operations - ABB OHB Installation, Service And Maintenance

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Outdoor SF6 Circuit Breaker - Type
OHB: Instruction for Storage,
Installation, Service and
Maintenance
Original Title: ABB Breaker
Uploaded by Sampath Kumar
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10. Maintenance operations:

Maintenance must only be carried out by
ABB personnel or in any case by suitably
qualified customer personnel who have in-
depth knowledge of the apparatus Should
the maintenance by carried out by the
customer's personnel, responsibility for
any interventions lie with the customer.
Replacement of any parts not included
in the "List of spare parts/accessories"
(para. 12.1.) must only be carried out by
ABB personnel.
In particular:
Complete pole with bushings/
connections
Operating mechanism
Closing spring unit
Opening spring.
11. Indications for handling
apparatus with SF6:
SF6 in its pure state is an odourless,
colourless, non-toxic gas with a density
about six times higher than air. For this
reason, although it does not have any
specific physiological effects, it can
produce the effects caused by lack of
oxygen in ambience saturated with SF6.
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SF6 is practically nil (sealed-for-li
presence in the room is, in any ca
immediately noticeable even in sm
(1-3 PPM) because of its sour an
smell. In this case, the room mus
aired before anyone uses it. Shou
any doubts, please contact our se
12. Spare parts and acc
All assembly operations of spare
accessories must be carried out f
instructions en-closed with the sp
either by ABB personnel or suitab
customer personnel with in-depth
of the apparatus Should the ma
carried out by the customer's pers
responsibility for any intervention
the customer. Before carrying out
operation, check that the circuit-b
is open, the springs discharged a
there is no voltage (power circuit
auxiliary circuits).
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