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Work scope
CLASS-1 RECONDITIONING OF LOW VOLTAGE (LV) POWER CIRCUIT BREAKERS
RECEIVE AND INSPECT
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The circuit breaker will be received along with the appropriate shipping and order documents.
Pertinent customer information and breaker nameplate information will be entered into our database, a
unique breaker I.D. number (used to track the breaker) will be assigned.
An incoming inspection, that includes verification of “as found condition” including, insulation and
contact resistance, will be performed and the results recorded.
The breaker trip device settings and trip bar force will be recorded.
The circuit breaker will be inspected for physical damage: parts that need replaced will be recorded.
The customer will be advised of any additional charges.
DISASSEMBLY
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The circuit breaker will be completely disassembled to its component parts. All parts will be inspected
for wear and physical damage.
If possible, the operating mechanism will be completely disassembled, thoroughly cleaned, inspected
for worn or damaged parts. Mechanism components will be stripped and plated.
Mechanism bearings will be cleaned, inspected and replaced, if necessary.
The primary finger clusters and main current carrying assemblies will be completely disassembled,
cleaned and polished. They will be silver plated as required.
The circuit breaker frame and other steel parts will be cleaned, stripped, and inspected for worn or
damaged areas. These parts will be plated or finished as requested by the customer, additional charges
may apply.
The trip shaft bearings & bushings will be removed, cleaned, inspected and replaced as necessary.
All electrical device coils will be cleaned.
The charging motor will be disassembled, cleaned, and inspected. Worn parts replace as required.
The gearboxes will be reconditioned (Where applicable).
Auxiliary contacts will be cleaned and tested.
Arc chutes will be removed, cleaned with a Heppa vacuum, and inspected for damage.
Control wiring will be removed, cleaned and inspected. If replacement is required, additional charges
will apply.
Insulating components such as phase barriers will be cleaned, inspected, and sealed with an electrical
grade clear coat.
REASSEMBLY
19. Standard hardware will be replaced with grade 5 hardware. Specialty hardware will be cleaned,
inspected and re-used as appropriate
20. The circuit breaker frame will be re-assembled.
21. The operating mechanism will be re-assembled and lubricated with the manufacturer’s recommended
lubricant. New bearings will be installed if required.
22. The operating mechanism will be installed in the circuit breaker frame and completely adjusted
according to the original manufacturer’s specifications.
23. The contact assemblies / pole pieces will be assembled, installed, and adjusted to the original
manufacturer’s information.
24. Current carrying components will be lubricated with the latest manufacturer’s specified lubricant.
25. The racking mechanism will be re-assembled and inserted into the breaker frame.
26. The wire harness and all components will be installed on electrically operated breakers.
Class 1 Reconditioning Workscope
Minor Revision
Rev 02: 07/08/2010
-1-
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27. Electrical accessories will be adjusted per original manufacturer’s information.
28. New trip unit will be installed per manufacturer’s instructions (If included in quotation).
29. The trip unit will be set according to the customer’s original trip settings of the original installed trip
unit unless otherwise specified by the customer.
30. Install a “Unique E-ESS Device ID” nameplate (When applicable).
31. New labels will be applied.
TESTING AND FINAL INSPECTION
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The breaker will be ductored at 100Amps to test for proper contact resistance.
The breaker will be meggered at 1000V dc and resistance levels will be recorded.
The breaker will be Hi-pot tested at 2200V ac for proper insulation resistance.
The breaker will be high current tested to verify trip data vs. the manufacturer’s time current curves.
Electrically operated breakers will have each device tested for proper operation and pick-up.
The undervoltage device, when applicable, will be tested for minimum pick-up and drop-out voltages.
The auxiliary switch will be tested for proper sequencing of its contacts.
The bell alarm, if included, will be tested for proper reset.
The secondary disconnects, when applicable, will be adjusted.
If electrically operated, the breaker will be operated a minimum of 20 times.
• 5 at minimum
• 5 at maximum
• 5 at nominal
• 5 anti-pump
If manually operated, the breaker will be operated 10 times.
• 5 open
• 5close
• When shunt trip is used, a minimum of 5 openings using the shunt trip at the minimum
control voltage specified for the coil
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5 trip free operations.
The operation of the racking mechanism and interlock will be checked.
Operation of visual indicators will be verified.
The trip bar force will be measured and recorded.
Quality control personnel will perform a final inspection.
Test and final inspection results will be documented and a copy will be attached to the breaker, along
with a quality certificate prior to shipment.
The breaker test data will be entered into our E-ESS database.
The breaker will be packaged for shipment.
Warranty 5 years
Class 1 Reconditioning Workscope
Minor Revision
Rev 02: 07/08/2010
-2-