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34
Z X 1 . 5 - R
—
6 Commissioning/operation
Note on safety at work
6.1 Commissioning
6.1.1 Preparatory work
In preparation for commissioning, the following
work is to be performed prior to connection
with the high voltage power supply:
•
Check mechanical and electrical interlocks for
compliance with the specified conditions
•
Perform a functional test on the protective
devices (observe DIN VDE 0141)
•
Check the general condition of the
switchgear and external conditions for
detrimental factors of any kind
•
Display the instructions for handling SF6 in
the switchroom. The handling specifications
for SF
•
Display the ABB instruction manual on the
handling of insulating gas and behaviour
during faults in the switchroom
•
Instruct the local operators on the
fundamental details of operating the
switchgear in normal service
•
Check the readiness for operation and the
switching condition of the upstream and
downstream electrical equipment
•
Perform further checks where necessary on
the following equipment from the areas
adjacent to the switchgear
- Power cables
- Control wiring
- Supply voltage and its polarity
- Remote controls
- External earth with connection to main
earthing bar (3.1)
- Switchroom equipment
- Switchroom condition
6.1.2 Initial start-up
•
Comply with all relevant safety regulations
•
Ensure that the switchgear circuit-breakers
are in the OFF position
I N S T R U C T I O N M A N U E L
Operation by trained specialists familiar
with the particular switchgear only.
•
Connect the supply and control voltage
and check the correct polarity
also apply accordingly to nitrogen (N2)
6
•
Close the disconnector for the relevant
busbar system
•
Cancel any existing short-circuiting and earthing
connections in the critical switching area
•
Check that corresponding conductor sections
are in line where relevant with several
incoming feeders and switchgear sections
•
Energise the switchgear step by step
•
Check measurements and functions
dependant on high voltage
•
Look out for irregularities of any kind
6.2 Switching operations
6.2.1 Circuit breaker
(Figures 3/7, 6/1, 6/2, 6/4)
The circuit breaker is fitted with a charging
motor. Charging of the spring energy storage
mechanism takes place automatically.
Opening and closing the circuit breaker
•
Closing and opening are effected by
operation of the devices fitted
•
ON-OFF switching operations may only be
performed with the control cabinet door closed
Opening the control cabinet door
constitutes intervention in the interlock
system. Opening of the control cabinet
door can constitute intervention in the
interlock system (see sections 3.8 to 3.10).
•
Observe the position indicator
Manual charging of the stored-energy spring
1. On failure of the charging motor,the charging
process can be performed or completed by
hand:
•
Open control cabinet door (4.3)
•
Insert charging lever (6.3) into recess (1.40)
and pump for approx. 25 strokes until the
charged condition is displayed
When the charged condition is reached, the
charging mecha nism automatically
disengages and further strokes of the
charging lever have no effect.
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