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M A I N T E N A N C E / D I S P O S A L
—
7 Maintenance/disposal
Maintenance serves to preserve trouble-free
operation and achieve the longest possible
working life of the switchgear.In accordance
with DIN 31 051 and IEC 62271-1, it comprises
the following closely related activities:
Inspection: Determination of the actual condition
Servicing:
Repair:
7.1 General
It is essential to observe the following during
all maintenance work:
•
The relevant regulations in section 1.2.2
•
The notes on safety at work in section 6
•
Standards and specifications in the country
where the switch gear is erected
It is recommended that ABB after sales service
personnel be called in to perform servicing and
repair work.
Follow/observe the instructions on SF
and the ABB instruction manual on the handling
of insulating gases and procedures for fault
conditions.
•
Keep these instructions and manual permanently
on display and available in the switchroom
The inspection and servicing intervals for the
switching devices are determined by fixed criteria
such as switching frequency and number of
short-circuit breaking operations.
The length of the intervals for inspection and
servicing of the control cabinet and its equipment
is influenced by ambient conditions (for instance
pollution and aggressive atmosphere).
7.2 Inspection/servicing
•
Under normal operating conditions (see section
1.3), inspection (visual examination) of the
operating mechanisms is to be carried out bya
suitably qualified electrician after 5,000 operating
cycles of the circuit breaker and 1,000 operating
cycles of the three position switch. Attention is
also drawn to instruction manual 1YHA000118
Measures to maintain the specified
condition
Measures to re-establish the specified
condition
•
In exceptional operating conditions (including
adverse climatic conditions) and/or particularly
adverse environments (including heavy
contamination and aggressive atmosphere)
inspection at shorter intervals may be required
•
Inspection is first and foremost to be visual
examination for contamination, corrosion
and moisture
•
The inspection should however also include
checking of the mechanical and electrical
functions of the following devices
-
Switching devices
-
Multifunction protection and switchbay
control unit.
•
If an incorrect condition is found, the
corresponding repair work is to be initiated
immediately
Cleaning of external surfaces
•
Remove dry, poorly adhering dust deposits with
a soft, dry cloth
•
Clean off more strongly adhering dirt with slightly
alkaline household cleanser and a moist cloth,
systems
not allowing any liquid to penetrate inside the
6
low voltage compartment and the operating
mechanism bays. Observe the manufactures
instruc tions for cleaning of the front surfaces
of the equipment installed in the door
7.2.1 Vacuum circuit breaker
•
The vacuum circuit breaker has a long service life.
It has a low maintenance operating mechanism
and the breaker poles are maintenance-free
Consult the relevant sections of instruction
manual BA 463/E for further information.
7.2.2 Three-position switch
•
The three-position switch is maintenance-free
for 2000 operating cycles
7.2.3 Gas system and gas servicing
•
Consult the relevant sections of instruction
manual for further information
•
Caution when working in the gas
compartment con cerned! The gas
concentration may causea danger of
asphyxiation!
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