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 assembly if
the indicator is visible
Contact wipe/erosion
(40Ka)
Refer to 6-5.1 details
Replace pole unit 87mm &
Replace pole unit assembly
Adequate Vacuum
See Section 6-5
Dirt on ceramic body
Visual Check
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 Check
Repair or tie as necessary
Terminals
Tight
Visual Check
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
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