Page 36
I.B. 3A74792H08
Effective
09/2014
6-3 INSPECTION AND MAINTANENCE PROCEDURES
No./Section
Inspection Item
Criteria
Inspection Method
Corrective Action
1. Insulation
Insulation
Integrity
Drive Insulator
and
Molded Pole Unit Support
Main Circuit to Ground
Between Main Circuit
Terminals
Control Circuit to Ground
No dirt
and
No cracking
Withstand
Withstand
Withstand
Visual Check
Visual Check
Hipot Tester
Hipot Tester
Hipot Tester
Clean with lint-free cloth
or
Replace cracked unit
Clean and retest or replace
Clean and retest or replace
Clean and retest or replace
2. Power
Elements
Vacuum Interrupters
Primary Disconnects
(VCP-W Only)
Precise Measure-
ment from rear
Contact wipe
Measurement
Adequate Vacuum
No burning or damage
Measurement - Close the circuit
breaker and proceed as described
in Paragraph 6-5
Measurement of Loading Spring as
described in Paragraph 6-6
Proceed with integrity check as
described in Paragraph 6-4
Visual Check
If the front indicator marks are
in the red area and the rear
measurement is not acceptable,
replace pole unit assembly
If measurement is not acceptable,
replace pole unit assembly
If integrity check is not satisfactory,
replace pole unit assembly
Replace if burned, damaged, or eroded
3. Control
Circuit
Parts
Closing and Tripping Device
Including Disconnects
Wiring
Terminals
Motor
Smooth and correct
operation by control
power
Securely tied in
proper place
Tight
Smooth, Normal
Operation
Test closing and tripping of the
circuit breaker twice
Visual Check
Visual Check
Functional Test
Replace any defective device. Identify
per trouble-shooting chart
Repair or tie as necessary
Tighten or replace if necessary
Replace brushes or motor
4. Operating
Mechanism
Tightness of Hardware
Dust or Foreign Matter
Lubrication
Deformation or Excessive
Wear
Manual Operation
Loading Spring Retaining
(Extra Capability “C”
Type Breakers Only)
No loose or missing
parts
No dust or foreign
matter
Smooth operation
and no excessive
wear
No excessive
deformation or wear
Smooth operation
Check every 3000
operations
Visual and by feel
Visual Check
Sight, feel and per maintenance
schedule
Visual and operational
Manual charging, closing
and tripping
Check number of operations
using operations counter
Refer to Table
6 . 1
and tighten
or reinstate if necessary with
appropriate tools
Clean as necessary
Refer to Figure
6 - 1 ,
Paragraph
6-11 and lubricate very spar-
ingly with light machine oil
Remove cause and replace parts
Correct per troubleshooting
chart if necessary
Refer to Figure
6 - 4
for clip location
and replace spring clips
Содержание 380 VCP-W 21
Страница 2: ......
Страница 13: ...I B 3A74792H08 Page 7 Effective 09 2014 ...
Страница 19: ...I B 3A74792H08 Page 13 Effective 09 2014 Figure 3 4 Front View VCP W 38kV Drawout Vacuum Circuit Breaker ...
Страница 21: ...I B 3A74792H08 Page 15 Effective 09 2014 Figure 3 6 Rear View VCP W 38kV Drawout Vacuum Circuit Breaker ...
Страница 22: ...Page 16 I B 3A74792H08 Effective 09 2014 Figure 3 7 Typical VCP W 38kV Escutcheon ...
Страница 23: ...I B 3A74792H08 Page 17 Effective 09 2014 Figure 3 8 Typical VCP W 38kV Escutcheon ...
Страница 33: ...I B 3A74792H08 Page 27 Effective 09 2014 compartment Figure 5 5 Charging Schematic ...
Страница 34: ...Page 28 I B 3A74792H08 Effective 09 2014 Figure 5 6 Typical VCP W DC and AC Control Schematics Drawout ...
Страница 35: ...I B 3A74792H08 Page 29 Effective 09 2014 Figure 5 7 Typical VCP WR DC and AC Control Schematics Fixed ...
Страница 38: ...Page 32 I B 3A74792H08 Effective 09 2014 Figure 5 10 Undervoltage Trip Device Configuration ...
Страница 41: ...I B 3A74792H08 Page 35 Effective 09 2014 Figure 6 1 Lubrication Points Drawout Circuit Breaker Shown ...
Страница 60: ...Page 54 I B 3A74792H08 Effective 09 2014 ...
Страница 62: ...Page 56 I B 3A74792H08 Effective 09 2014 Style 3A74792H08 Printed in USA ...