Maintenance - ABB ZS1 Instruction Manual

Maintenance

7
7.1 General
Maintenance serves to preserve trouble-free
operation and achieve the longest possible working
life of the switchgear. In accordance with DIN
31051 and/or IEC 61208, it comprises the
following closely related activities:
Inspection: Determination of the actual condition
Servicing: Measures to maintain the specified
condition
Repair: Measures to restore the specified
condition.
Note:
In all repair work the regulations of the country
where the equipment is installed must be strictly
complied with.
In Germany, this refers, among other, to the
following safety regulations and specifications:
• Accident prevention regulations VBG 1 and VBG 4
• VDE 0105 „Operation of electrical installations"
Maintenance work may only be performed in a
careful manner by trained personnel familiar with the
characteristics of the individual switchgear, in accor-
dance with all relevant safety regulations according
to DIN VDE/IEC and of other technical authorities,
and with other overriding instructions. It is re-
commended that ABB service personnel be called in
to perform servicing and repair work, and this is
necessary for some of the work detailed below.
The inspection and servicing intervals for some of
the equipment/components (e.g. replacement
parts) are determined by fixed criteria such as
switching frequency and number of short-circuit
breaking operations. For other parts, on the other
hand, the length of the intervals may depend, for
example, on the different modes of operation in
individual cases and the degree of loading.
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 aggresive atmosphere).
The following operating instructions must also be
observed together with this instruction manual in
the individual cases concerned:
• Vacuum circuit-breaker,
type VD4
• Vacuum circuit-breaker,
type VD4 E
• Vacuum circuit-breaker,
type VD4, High-current
58
• Earthing switch,
type EK6
• Switch-disconnector,
type C3
If necessary, further details can be taken from the
technical documentation for the switchgear
(including, for example, any agreed special
operating conditions).
7.2 Inspection
• Before inspection, where required, the working
area must be isolated and secured against
reconnection in accordance with the „Safety
Regulations" specified by DIN VDE/IEC.
• Proper condition of the switchgear should be
monitored by regular inspections.
• Under normal operating conditions, inspection
should be conducted once every four years by
specially trained professional electricians.
• Under unusual operating conditions (including
adverse climatic conditions) and/or peculiar en-
vironmental stresses (among other strong
pollution
inspection may be necessary at shorter
intervals.
• Inspection is primarily to constitute a visual
check for grime, corrosion and moisture:
– Effects of high temperature on the main
– Traces of partial discharge on the insulating
– Traces of leakage current on the insulating
– Surfaces of the contact systems.
• However, inspection is also to include the proper
mechanical/electrical function of the following
facilities:
interlocking, protection and signalling facilities.
• On panels with additional ventilation devices due
to increased ambient temperature (see also
section 1.3):
1. Check flap 20.3 for correct function. (See also
2. The centrifugal fan (if fitted) doesn't require
BA 352/E
BA 377/E
BA 359/E
and aggressive
circuits,
material parts,
material parts,
switching devices,
section 6.1.1 and figures 6/21 and 6/22.)
any special maintenance. Its working life,
depending on the service conditions - one
significant parameter
temperature - is approx. 20,000 to 30,000
operating hours.
BA 304/E
BA 275/E
atmosphere),
actuating,
being the room
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