Instruction Book
Effective: November 2017 Page 51
IB131016EN For more information visit: www.Eaton.com
Table 6.1 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 Withstand Hipot Tester Clean and retest or replace
Between Main Circuit Terminals Withstand
Hipot Tester
Clean and retest or replace
Controls Circuit to Ground Withstand
Hipot Tester
Clean and retest or replace
2. Power Elements Vacuum Interrupters Contact Erosion
Visibility of Mark
(Up to 25Ka)
Visual:
Close the breaker and look for the
mark on moving stem from the
rear of the breaker (see Figures
6-1 & 6
-
2).
If the mark is not visible,
replace pole unit assembly
Contact wipe visible
(Up to 25Ka)
Visual:
Close the breaker and look for
indicator (see Figures 6-2, 6-3,
6.4).
Replace pole unit assembl
if
the indicator is visible
Contact wipe/erosion
(40Ka)
Refer to 6-5.1 details
Replace pole unit 87mm &
Replace pole unit assembly
dequate Vacuum
See Section 6-5
Dirt on ceramic body
Visual Chec
Clean with dry lint-free cloth
3. Control Circuit Closing and Tripping Device Smooth and correct
operation by control power
Test closing and tripping
of the
breaker twice
Replace any defective device,
identify per trouble-shooting
chart in this section
Wiring
Securely tied in proper
place
Visual Chec
Repair or tie as necessary
Terminals Tight
Visual Chec
Tighten or replace if
necessary
Motor If required
Functional Test
Replace as necessary
Tightness of Hardware No loose or
missing parts
Visual and tighten with
appropriate
tools
Tighten or reinstate if
necessary
4. Operating
Mechanism
Dust or Foreign Matter matter
No dust or foreign Visual Check Clean as necessary
Lubrication Smooth operation
and no
excessive wear
Sight and feel
Referr to Figures
6-5, 6-6
and
paragraph 6-10
Deformation or Excessive Wear No excessive
deformation or
wear
Visual and operational
Remove cause and replace
parts
Manual Operation Smooth operation
Manual charging closing
and tripping Correct per troubleshooting
chart (Table 6.4) if necessary