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I.B. 3A74791H04
Page 29
Effective 7/97
6-3 INSPECTION AND MAINTENANCE PROCEDURES
No./Section
Inspection Item
Criteria
Inspection Method
Corrective Action
1. Insulation
Drive Insulator
No dirt
Visual Check
Clean with lint-free cloth
and
and
or
Molded Pole Unit Support
No cracking
Visual Check
Replace cracked unit
Insulation
Main Circuit to Ground
Withstand
Hipot Tester
Clean and retest or replace
Integrity
Between Main Circuit
Withstand
Hipot Tester
Clean and retest or replace
Terminals
Control Circuit to Ground
Withstand
Hipot Tester
Clean and retest or replace
2. Power
Vacuum Interrupters
Visibility of 3 front
Visual/Measurement - Close the circuit
If the front indicator marks are
Elements
Contact Erosion Marks
breaker and observe if all 3 front indicator
in the red area and the rear
and Precise Measure-
marks are in green area, and then
measurement is not acceptable,
ment from rear
proceed as described in Paragraph 6-5
replace pole unit assembly
Contact wipe
Measurement of Loading Spring as
If measurement is not acceptable,
measurement
described in Paragraph 6-6
replace pole unit assembly
Adequate Vacuum
Proceed with integrity check as
If integrity check is not satisfactory,
described in Paragraph 6-4
replace pole unit assembly
Primary Disconnects
No burning or damage
Visual Check
Replace if burned, damaged
or eroded
3. Control
Closing and Tripping Device
Smooth and correct
Test closing and tripping of the
Replace any defective device.
Circuit
Including Disconnects
operation by control
circuit breaker twice
Identify per trouble-shooting
Parts
power
chart
Wiring
Securely tied in
Visual Check
Repair or tie as necessary
proper place
Terminals
Tight
Visual Check
Tighten or replace if necessary
Motor
Smooth, Normal
Functional Test
Replace brushes or motor
Operation
4. Operating
Tightness of Hardware
No loose or missing
Visual and by feel
Refer to Table
6.1 and tighten or
Mechanism
parts
reinstate if necessary with
appropriate tools
Dust or Foreign Matter
No dust or foreign
Visual Check
Clean as necessary
matter
Lubrication
Smooth operation
Sight, feel and per maintenance
Refer to Figure 6-1, Paragraph 6-11
and no excessive
schedule
and lubricate very sparingly with
wear
light machine oil
Deformation or Excessive
No excessive
Visual and operational
Remove cause and replace parts
Wear
deformation or wear
Manual Operation
Smooth operation
Manual charging, closing and
Correct per troubleshooting chart if
tripping
necessary
Содержание Cutler-Hammer W-VAC
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