E-46
22. Inspection and Maintenance
22.1 Guidances for Inspection and Maintenance
22.1.1 Guidances for Inspection and Replacement according to the period of use and the usage environment
An after-sale service person approved by Mitsubishi Electric inspects and maintains the products. Contact
information is listed on the last page of this manual. Please check it and request inspection. When you inspect
and maintain the products, read thoroughly section 22.3 Inspection Details.
The circuit breakers are inspected to detect part that may be deteriorating at an early stage,
resulting in maintaining the performance of the circuit breaker through timely renewal of
consumable and deteriorating parts and preventing accidents that could otherwise arise as the
circuit breaker approaches the end of lifetime.
Regular maintenance such as grease lubrication, as-needed replacement of component and so
on, is necessary in order to maintain the performance of the circuit breaker.
Inspection :
Maintenance:
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
circuit breaker.
(Note 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 circuit breaker.
(Note 2) When an after-sale service person approved by Mitsubishi Electric inspects and maintains the products according to the period
of use and usage environment
22.1.2 Guidances for Inspection and Replacement according to the number of operating cycles
Environments
Specific examples
Guidances for
inspection
Guidances for
maintenance
Guidances for
replacement
Normal
service
condition
Indoor where there is no
corrosive gas and little dust.
Distribution panels in dividual
electrical rooms that are not
dustproof and air-conditioned.
Once every
2 to 3 years
Once every
2 inspection
Within approx.
7 to 15 years
Adverse
environment
Locations with especially
service corrosive gas and dust
conditions and where humans
cannot stay for a long period
of time.
Geothermal power plants, sewage
(treatment) plant, steel works, paper
factories, pulp factories. Chemical
factories, quarries, mining areas, etc.
Once every
half year
Once a year
Within approx.
1 to 3 years
Model
Guidances for inspection
Product performance
Number of operating
cycles with current
(Note 1)
Number of operating
cycles without
current
Limit of number of operating cycles
(Note 2)
Limit of number of operating cycles
with overload current
With
current
Without
current
Total
Current
Number of
operating cycles
AED630-CV
Every 500 cycles
Every 2,000 cycles
6,000
4,000
10,000
6 times the rated
current
12 cycles
AED1000-CV
AED1250-CV
AED1600-CV
