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Basic Installation and Operation Guide
MAINTENANCE
In order to ensure continued reliable and safe operation of the equipment, a
program of periodic maintenance must be established. Operating and
environmental conditions will dictate the frequency of inspections required.
NFPA Publication 70B "Electrical Equipment Maintenance" (Fig. 40) may be
used as a guide for setting up the maintenance program.
Maintenance Record
A permanent record of all maintenance work should be kept.
As a minimum, this record should include information on:
1)
Items inspected
2)
Test reports
3)
Equipment condition
4)
Corrective actions or adjustments
5)
Date of work
6)
Comments
The degree of detail will depend on the operating conditions.
WARNING
WARNING
WARNING
NOTE: Refer to the SAFETY section of this manual for important information.
After disconnecting and locking out incoming power and before performing
any maintenance, it is recommended that a safety ground be connected to
the main power bus (Fig. 41). After maintenance is complete, perform the
checks in the PRE-ENERGIZATION CHECK section of this manual before
restoring power.
The following pages detail maintenance procedures recommended for
Toshiba JK 400 ampere medium voltage controllers. In general, the
following items should be included on the maintenance checklist:
-
Cleaning
-
Checking and tightening of electrical connections
-
Checking of fuses and fuse connections
-
Proper installation of any removable barriers
-
Vacuum contactor maintenance
TOSHIBA
Contact with energized components can cause severe injury or death.
Turn off and lock out Primary and Control Circuit Power before servicing.
Improper maintenance can cause severe injury, death, and extensive property
damage. Only qualified and authorized persons are to install, operate, or
service the equipment.
This equipment utilizes both low and high voltage for operation. Verify that
all test equipment is suitable for the voltage being checked.
JK 400 Series Fixed Controllers
Fig. 40 NFPA 70B
Electrical Equipment
Maintenance
Fig. 41 Attaching Safety Ground
28
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