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Instruction
Book
Page 38
IB131009EN
6-3 INSPECTION AND MAINTENANCE
PROCEDURES
No./Section
Inspection Item
Criteria
Inspection Method
Corrective Action
1. Insulation
Drive Insulator
and
Molded Pole Unit Support
No dirt
No cracking
Visual Check
Visual Check
Clean with lint-free cloth
Replace cracked unit
Insulation
Integrity
Main Circuit to Ground
Between Main Circuit
Withstand
Withstand
Hipot Tester
Hipot Tester
Clean and retest or replace
Clean and retest or replace
Terminals
Controls Circuit to Ground Withstand
Hipot Tester
Clean and retest or replace
2. Power
Elements
Vacuum Interrupters
Contact Erosion
Visibility of Mark
Visual:
1) For all breaker ratings
If the mark is not visible
except 3150A, close the
breaker and look for green
mark on moving stem from
the rear of the breaker
(see Figures
6-2
&
6-3
).
(except 3150A), replace pole
unit assembly
2) For the 3150A breaker
only, close the breaker and
observe the erosion mark on
the right inside of the pole
unit support (see Figure
6-4
).
Use the erosion gauge to
inspect the erosion level
(see Figure
6-5
).
If the erosion gauge pointer
(3150A only) is aligned or above
erosion mark, replace pole unit
assembly
Contact wipe visible
Visual (Figures
6-6 & 6-7
)
Replace pole unit assembly
Adequate Vacuum
See Section 6-4
Replace pole unit assembly
Dirt on ceramic body
Visual Check
Clean with dry lint-free cloth
Primary Disconnects
Pole Unit Black Clips
No burning or damage
Every 1000 Operations
Visual Check
Operation Counter
Replace if burned, damaged,eroded
Replace Black Clips
3. Control
Circuit
Closing and Tripping Device
Including Disconnects
Smooth and correct
operation by control
power
Test closing and tripping
of the breaker twice
Replace any defective device,
identify per trouble-shooting
chart
Wiring
Securely tied in
proper place
Visual Check
Repair or tie as necessary
Terminals Tight
Visual Check
Tighten or replace if
necessary
Motor
If required
Functional Test
Replace brushes
Tightness of Hardware
No loose or
missing parts
Visual and tighten with
appropriate tools
Tighten or reinstate if
necessary
Содержание W-VAC Series
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