Hitachi H20-T - Page 45

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6. HANDLING MAINTENANCE AND INSPECTION
6-1 STORAGE AND CONVEYANCE
Starter, contactor and thermal overload relay should be stored or carried under the following conditions.
Table 29.
Conditions Remarks
Ambient Upper limit : 70℃
temperature
Lower limit: -30℃
Limited by a change in the characteristic
due to bending of bimetal of thermal
overload relay, deterioration of PVC
wire, and the like.
Humidity Upper limit : 85%
Lower limit: 45%
If the devices are left for a long time
at a place where the humidity is high,
the insulation may be deteriorated
when they are used.
Atmosphere ･ A condition where the
devices are free from
abnormal vibration or
shock .
･ A condition where the
devices are not splashed
with water, oil, etc.
･ A condition free of
corrosive gas, combustible
gas, dust, vapor, salt,
etc.
Use special care for the storage after
unpacking.
Conveyance Carefully handle and carry the
devices .
The devices are carefully packed;
however, if they should be dropped
from a high place, a part of the case,
etc. may be damaged.
6-2 MAINTENANCE AND INSPECTION
6-2-1 Inspection
In order to prevent troubles and maintain the performance of the starter and contactor, it is recommended that
initial and periodical inspections are performed. Most unexpected troubles take place at the start of operation, so
that the initial inspection is particularly significant.
(1) Initial inspection
It is recommended that the following items be inspected before and after, 3 to 10 days after and 3 months after
operation, respectively. Periodical inspections should be carried out after the above inspections.