Inspection And Maintenance - Mitsubishi Electric AE-SW Series Instruction Manual

Inspection and maintenance

1. Guideline for inspection and replacement ... 36
2. Appearance and structure ..................... 37
3. Preparation before inspection ............... 37
The maintenance and inspection items and frequency differ by their operation environment. Carefully read the contents of the
manual and perform thorough inspection and maintenance.
Inspection and maintenance should be performed by an expert with the required knowledge. Failure to do so
could result in electrical shock.
Inspection and maintenance should only be performed after turning off the upper breakers and verifying that
there is no current flowing. Failure to do so could result in electrical shock.
If the electricity cannot be shut off, wear rubber gloves and shoes, stand on a rubber mat, and use insulated tools. Pay special
attention to the insulation between the human body and live parts as the person must approach close to the live parts.
Normal closing/opening operation is safe as the operation parts are insulated with molded material from the live parts.
1. Guideline for inspection and replacement
< Purpose>
Inspection: The purpose of inspecting breakers is to maintain the breaker performance and to prevent accidents caused
by aging parts. This can be achieved by finding faulty parts at an early stage and by replacing consumable and
wearable parts in a timely manner.
Maintenance: To maintain the breaker's performance, periodic servicing including lubrication is required. Please contact our
service department. Do this once every 2 periodic inspections.
1.1 Guideline for periodic inspection, maintenance and replacement based on the operating period and environment
The initial inspection should be performed once after 1 month of operation. After that, periodic inspections should be per-
formed according to the operation environment.
Operation environment
1 Environment where air is always clear and dry
Standard operation
environment
2 Indoors with little debris and dust and no corrosive gas
Environment with little debris and dust and with sulfurous,
hydrosulfuric, saline, or high humidity gas present
1
Environment where average daily ambient temperature
Harsh
exceeds 35 °C
environment
Environment dif cult for a person to remain in for a long time,
2
and environment with excessive debris and dust
1.2 Guidelines for inspection and replacement based on the number of operating cycles
Model Number of
operating cycles
with rated current*1
AE630-SW
AE1000-SW
AE1250-SW
Every 500 cycles
AE1600-SW
AE2000-SWA
AE2000-SW
Every 150 cycles
AE2500-SW
AE3200-SW Every 100 cycles
AE4000-SWA
Every 50 cycles
AE4000-SW 3 poles
AE5000-SW 3 poles
AE6300-SW 3 poles
Every 100 cycles
AE4000-SW 4 poles
AE5000-SW 4 poles
AE6300-SW 4 poles
*1 Regardless of the amount of current, when current is turned on and off, it is considered to be an operating cycle with rated current.
*2 Maintenance guideline based on the number of operating cycles is 2000 cycles for all models.
E-36
CAUTION
Guideline for inspection
Number of
operating cycles
With rated current
without rated current*2
Every 2000 cycles
Every 1000 cycles
Every 500 cycles
4. Inspection .............................................. 37
5. Handling of abnormal operations .......... 40
Case example
Electric chamber with
dust prevention and air
control
In an independent electric
chamber, a panel, or a box
without dust prevention
and air control
Geothermal plant,
wastewater treatment
plant, or steel, paper,
or pulp factory, etc.
Chemical factory, quarry,
or mine site, etc.
Product performance
Number of operating cycles (cycles)
Without current
5,000 20,000
23,500
1,500
18,500
1,000 19,000
500 19,500
9,000
1,000
4,000
Guideline for Guideline for Guideline for
inspection maintenance replacement
Approx. 15 years
Every 2
Once every
periodic
2 to 3 years
inspections
Approx. 7 ~ 15 years
Once every Once every
Approx. 3 ~ 7 years
year 2 years
Once every Once every
Approx. 1 ~ 3 years
six months year
Overload characteristic
Total Current
operating cycles
25,000
20,000 6 times the
rated current
10,000
5,000
Number of
12 cycles
3 cycles