Mitsubishi Electric AE-SW Series, Инструкция по эксплуатации

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1. Guidelines for Inspection and Maintenance .... 32
2. External view and Internal construction..... 33
3. Preparation before Inspection ............... 33
Inspection and Maintenance
The maintenance and inspection frequency and content are different depending on the working conditions. Read through the
following for details of sufficient maintenance and inspection requirements.
If maintenance and/or inspection should be carried out without cutting of the power supply in an unavoidable cases, wear
rubber gloves and insulated boots laying rubber mat on the floor. Use insulated tools and instruments only. An access to the
live parts is necessary in this maintenance and inspection work, when workers’ full attention should be paid to the insulation of
human body from the live parts.
Any normal opening/closing may be done safely because the live parts are covered with insulated molded case or the like.
¡
The personnel having expertise concerned shall perform any maintenance/inspection. Note that there are the risk
of electrical shock.
¡
Any maintenance/inspections shall be performed after cutting off the master circuit-breaker and making sure that
there is no current flowing. Note that there are the risk of electrical shock.
Inspection : ACBs are inspected to detect part that may be deteriorating at an early stage, to maintain the performance of the
ACB through timely renewal of consumable and deteriorating parts and to prevent accidents that could other-
wise arise as the breaker approaches the end of lifetime.
Maintenance : Maintenance is necessary in order to maintain the performance of the ACB at every two times of inspection, ex.
grease lubrication. Please contact to our service network.
1. Guidelines for Inspection and Maintenance
1.1 Guidelines for Inspection and Replacement according to the period of use and the environment of usage
It is recommended that periodic inspections are performed about once a month commencing use thereafter according to the
guidelines for inspection, maintenance and renewal to ensure a stable, long-term use of the ACB.
1.2 Guidelines for Inspection and Replacement according to the number of operating cycles
Environments
Guidances for
inspection
Specific examples
Guidances for
replacement
Adverse
environment
Reference
atmosphere
Guidances for
maintenance
1
2
1
2
Dustproof and air-conditioned
electrical rooms, etc.
Once every
2 to 3 years Once every
2 inspection
Once every
half year
Once
a year
Once
a year
Once every
2 years
Within approx.
3 to 7 years
Within approx.
1 to 3 years
Within approx.
7 to 15 years
Within approx.
15 years
Distribution panels in individual
electrical rooms that are not
dustproof and air-conditioned.
Chemical factories, quarries,
mining areas, etc.
Places with ever clear and dry air.
Indoor Where there is no corrosive gas and little
dust.
Places with little dust but with such gases as salty,
sulfurous acid, hydrogen sulfide, high matures.
Places average over 24hours of ambient air
temperature 35
° C.
Locations with especially service corrosive gas
and dust conditions and where humans cannot
stay for a long period of time.
Geothermal power plants, waste
water treatment, steel miles, paper
factories, pulp factories, etc.
Guidelines for inspection Product performance
Limit of number of operating cycles
with overload
Current Total Without current
Limit of number of operating cycles with rated current
Number of
operating cycles
Model
AE4000-SWA
AE4000-SW 3P
AE5000-SW 3P
AE6300-SW 3P
AE4000-SW 4P
AE5000-SW 4P
AE6300-SW 4P
AE3200-SW
AE2500-SW
AE2000-SW
AE2000-SWA
AE1600-SW
AE1250-SW
AE1000-SW
AE630-SW
12 cycles
3 cycles
6 times the rated
current
25,000
20,000
10,000
5,000
20,000
23,500
18,500
9,000
4,000
19,000
19,500
5,000
With rated current
1,500
1,000
1,000
500
every
1,000 cycles
every
500 cycles
every 100 cycles
every
100 cycles
every 50 cycles
Number of
operating cycles
with rated current
∗
1
Number of
operating cycles
without rated
current
∗
2
every
500 cycles
every
2,000 cycles
every
150 cycles
∗
1 Operating cycles shall be regarded as being with rated current, even if the current is much less than the maximum rated current of the breaker.
∗
2 Guidances for maintenance is every 2000 cycles terms of the number of operating cycles for all models.
CAUTION
4. Inspection Details .................................. 33
5. Fault Diagnosis ..................................... 36