Isolated Phase Bus

The isolated phase bus is one of the most overlooked, yet critical systems inside of a power plant.

Proper assessment and regular preventative maintenance are crucial to the lifespan and functionality of an isolated phase bus system.

In addition to Emergency Repair, our team offers a full range of preventative maintenance including inspection and cleaning services for all components related to your isolated phase bus. Customers are able to choose between different packages that fit their specific needs.

We’re happy to work with you to find out what level of inspection and maintenance is right for you.

Bronze Package

Electrical Connection Inspection

Remove bolting clamping covers from Generator, Ground Switch taps, Bus accessory compartment taps and GSU Transformer Remove covers from all apparatus connected to the Isolated phase bus duct (Generator, Transformer, PT, Etc.)

1. Remove all flexible braids and hardware
2. Perform visual inspection of gasket material, and replace as necessary
3. Perform visual inspection of electrical connection end points for integrity of silver plated ends
4. Perform visual inspection of flexible braided assemblies and hardware
5. Clean ground strap connection point
6. Hand clean reachable areas inside termination enclosure, bus ends, insulators and silvered ends
7. Reinstall flexible braided assemblies with new bolting stainless steel bolting hardware, torque to recommended specs
8. Recommend repairs, report of findings

Silver Package

Everything included in the Bronze Package plus:
Random Inspection and Cleaning of Bus

Open random insulator covers, hand wipe and clean (every 3rd set of insulators per phase)

1. Perform visual inspection inside isolated phase bus enclosure to include conductor and insulator and other reachable components inside bus
2. Vacuum reachable debris
3. Hand wipe insulators with denatured alcohol and lint free rags same as above
4. Report of findings, recommendations

Gold Package

Everything included in the Bronze Package plus:
Visual Inspection and Cleaning of the Bus

Open all insulator covers, hand wipe and clean

1. Perform visual inspection inside isolated phase bus enclosure to include conductor and insulator and other reachable components inside bus
2. Hand wipe with denatured alcohol and lint free rags reachable insulators, inspect for cracks, chips, base separation, tracking or arcing
3. Vacuum reachable debris inside enclosure
4. Replace all gasket material
5. Reinstall covers
6. Provide recommended repairs and report of findings

AC/DC Hi-Pot Testing

Additional services provided:

• New Installations
• Retrofitting and modifying existing systems
  • Transformer Replacement
  • Breaker Replacement
  • CT, PT & Surge Cubicle Replacements
• Repairing existing systems
• Online, non invasive, non destructive testing
  • thermography
  • ground testing
  • visual inspection
  • condition assessment
• Certified Aluminum Welding
• Specialty rigging crews for complex projects and schedules with rigging plans

Take a look at some of the work we’ve done for customers on their isolated phase bus systems:

Canada | Quillota | Southwest Kansas