Inspections And Maintenance; Daily Inspections; Regular Inspections - Toshiba T300MVi MEDIUM VOLTAGE Instruction Manual

INSPECTIONS AND MAINTENANCE

Maintenance and inspection is a particularly effective means to help prevent failures and reduce
down time. Creating equipment specific inspection and maintenance check sheets can help to perform
maintenance and inspection effectively. Detailed inspections and regular maintenance should be carried
out in short cycles initially until a schedule reflecting the site-specific conditions can be determined.
For items that are too high to reach, use a step ladder to gain access. Do not attempt to climb on
the equipment.

Daily Inspections

Daily inspections consist mainly of visual inspections on the following items. These observations
should be made with all of the cubicle doors closed and safety covers installed. Any abnormalities
discovered should immediately be repaired.
1) Check the temperature, the humidity, the presence of corrosive or explosive gases, and the
presence of dust in the area.
2) Check for any abnormal sound or vibration of the reactor, transformer, or cooling fans.
3) Check for abnormal odors such as the smell of burning insulating materials.

Regular Inspections

Carry out regular inspections with power off, locked out, and with confirmation that the bus voltage
is completely discharged. Use power lockout/tagout procedure on the disconnecting means in
accordance with applicable local electrical codes (in the U.S., see 2002 NEC Article 430-101) before
performing any drive maintenance.
The first thing to do in maintenance and inspection is cleaning. Cleaning should be carried out
according to the conditions of the equipment. Before starting cleaning, turn off the power supply and check
that the main circuit voltage is reduced to 0. Clean dust with a vacuum, dry compressed air, and clean dry
cloths. Note that excessive air pressure when blowing out equipment may damage parts and wiring. Do
not use solvents to clean the drive. Substances stuck to the circuits, which cannot be removed by
blowing, should be wiped away using a cloth. As a basic rule, cleaning should start from the upper parts
and end at the lower parts. Cleaning of the lower parts last will allow proper removal of substances that
could drop from the upper parts.
CAUTION
DANGER
CAUTION
DANGER
- 4