Commissioning; Preparatory Work - ABB Uniswitch Operation And Maintenance Manual

4.2 Commissioning

4.2.1 Preparatory work

Before connection with
the high-voltage power
supply
ABB
Uniswitch Operation and
Maintenance Manual
In preparation for commissioning, the following work must be carried
out:
•
Check the general condition of the switchgear for any damage or
defects.
•
Visually inspect the switching devices, withdrawable parts, isolating
contacts, insulating parts, etc.
•
Check the connection of the main earthing bar to the installation
earthing conductor (following the appropriate safety regulations).
•
Check the paintwork for damage and, where necessary, touch up as
described in section 5.5.
•
Remove all residues of materials, foreign bodies and tools from the
switchgear.
•
Clean the switchgear, rubbing down insulating parts with a soft, dry,
clean, non-fraying cloth. Remove any greasy or sticky dirt as
described in section 5.4.
•
Correctly remount all covers etc. removed during assembly and
testing procedures.
•
Remove transport caps from vacuum circuit-breakers - if still fitted.
•
Remove the lifting eyebolts on high current vacuum circuit-breakers
- if still fitted.
Preparatory work for SF6 circuit-breakers:
•
Clean the insulating parts with clean dry cloth.
•
Check that the upper and lower terminals are clean and free from
any deformation caused by shocks received during transport and
storage.
•
It is advisable to check the SF6 gas pressure.
•
Switch the auxiliary and control voltage on.
•
Carry out testing operations on switching devices manually or by
electrical control, and simultaneously observe the relative position
indicators.
•
Check mechanical and electrical interlocks for effectiveness, without
using force.
•
Set the protective devices in the switchgear to the required values
and check their function with test equipment.
•
Instruct local operators regarding the basic details of regular
handling of the switchgear.
23
UNI S14GB 05-02