ABB Uniswitch User Manual

ABB 23
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
4.2 Commissioning
4.2.1 Preparatory work
Before connection with
the high-voltage power
supply
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.

ABB Uniswitch Specifications

General

Brand	ABB
Model	Uniswitch
Category	Switch
Language	English