Inspection and Maintenance

This equipment contains components manufactured with various materials. Some cleaning agents could damage the integrity of the surface of the component reducing its insulating properties, structural strength or conductivity. Use this guide to determine a compatible cleaning agent for typical materials incorporated in this equipment. Never spray cleaners or use compressed air on or inside the equipment as this will cause the contamination or cleaners to become airborne and could contaminate other components.

• Greased joints:

  • Wipe surface grease away with a clean cloth. Reapply the grease recommended for that assembly, found in the maintenance section of the documentation for that assembly.

• Glass polyester insulator surfaces:

  • Wipe with a clean cloth dampened with denatured alcohol.

  • Use distilled or purified water to moisten the cloth in place of denatured alcohol, but standing/pooling water must be absorbed and not left to air dry.

  • Use care so the liquid does not flow between bus joints.

• Epoxy insulator surfaces:

  • Wipe with a clean cloth dampened with denatured alcohol.

  • Use distilled or purified water to moisten the cloth in place of denatured alcohol, but standing/pooling water must be absorbed and not left to air dry.

  • Remove residue by lightly rubbing with a dry Scotch-Brite non-scratch scour pad followed by wiping with a clean cloth moistened with denatured alcohol, distilled or purified water.

  • Use care so the liquid does not flow between bus joints or between the epoxy coating and bus.

• Ceramic/porcelain insulator surfaces:

  • Wipe with a clean cloth dampened with denatured alcohol.

  • Use distilled or purified water to moisten the cloth in place of denatured alcohol, but standing/pooling water must be absorbed and not left to air dry.

  • Use care so the liquid does not flow between bus joints or between the epoxy coating and bus.

  • Remove residue by lightly rubbing with a multi-functional HV insulator cleaning paste on a clean cloth followed by wiping with a clean cloth moistened with denatured alcohol, or distilled or purified water.

• Poly concrete standoff insulator surfaces:

  • Wipe with a clean cloth dampened with denatured alcohol.

  • Use care so the liquid does not flow between bus joints.

• Plastisol boot surfaces:

  • Wipe with a clean cloth dampened with denatured alcohol.

  • Use distilled or purified water to moisten the cloth in place of denatured alcohol, but standing/pooling water must be absorbed and not left to air dry.

  • Use care so the liquid does not flow inside the boot and between the bus joints.

• Polycarbonate/Lexan surfaces:

  • Wipe with a clean cloth dampened with denatured alcohol.

  • Use distilled or purified water to moisten the cloth in place of denatured alcohol, but standing/pooling water must be absorbed and not left to air dry.

  • Do not wipe in a circular motion, use linear strokes directed toward an exposed edge.

  • Change the water and rinse the cloth often.

  • Dry with a clean cloth.

  • Use denatured alcohol dampened on a clean cloth on the polycarbonate/Lexan insulation barriers as there is no UV protection applied to the sheet that would cause degradation.

• Silver/tin plated copper surfaces:

  • Wipe with a clean cloth dampened with denatured alcohol.

  • Remove residue by lightly rubbing with a dry Scotch-Brite non-scratch scour pad followed by wiping with a clean cloth moistened with denatured alcohol.

  • Use care so the liquid does not flow between bus joints.

• Powder coated surfaces:

  • Wipe with a clean cloth dampened with denatured alcohol.

  • Use distilled or purified water to moisten the cloth in place of denatured alcohol, but standing/pooling water must be absorbed and not left to air dry.

  • Remove residue by lightly rubbing with a dry Scotch-Brite non-scratch scour pad followed by wiping with a clean cloth moistened with denatured alcohol, or distilled or purified water.

  • Use care so the liquid does not splash or flow into seams or onto other components.

• Control component surfaces:

  • Low voltage wires within this equipment are SIS insulated and may be wiped with a clean cloth dampened with distilled or purified water. Do not use alcohol.

  • Circuit boards can have isopropyl alcohol applied by small brush to remove deposits.

  • Solvents and alcohol (denatured, isopropyl) can damage some plastics, such as amorphous plastics. When in doubt, use a clean dry cloth, or a clean cloth dampened with distilled or purified water and dry completely.

• NOTES:

  • Do not use cleaners such as Lectra-Clean™ made by CRC (noted in some of the low voltage equipment manuals). Lectra-Clean can damage some plastics and other components.

  • Do not use chemicals such as Simple Green™ as it can cause corrosion on some parts and in some cases those cleaners describe rinsing the surface after application.

  • Do not splash or spray liquids as they can infiltrate areas that cannot be cleaned or dried properly.

  • Components within the equipment are not rated to be exposed to moisture. Exposure to moisture may cause performance issues to develop over the life of the product.

1. Turn off all power supplying this equipment. Be sure there is no backfeed through any feeder circuit. Always use a properly rated voltage sensing device to confirm that power is off.

2. Ground the main and feeder circuits.

3. Disconnect and remove fuses.

4. Disconnect and remove the circuit breaker.

5. Remove the front and rear covers from each main bus compartment. Inspect the busbars, primary contact supports, and insulating barrier(s).

6. Remove the insulating boots from the bus joints. Check all busbar connections and torque all 1/2 inch bolts to 55 lb-ft. (74.28 N•m).

   NOTE: Slight discolorations or tarnish of the silver plate is normal. Severe discoloration of the silver plate is an indication of an improper or loose contact and overheating. Clean the discoloration from the contact surfaces of the busbar and primary contact. Use an abrasive pad such as Scotch Brite.

7. Vacuum each compartment to remove dust, spiderwebs, and others. Wipe off the insulation with a clean cloth.

8. Lightly lubricate the moving primary and secondary contacts and fingers with Mobil 28™ red grease, SquareD™ part number 1615-100950T.

9. Lubricate all rollers and sliding parts with Mobil 28 red grease, SquareD part number 1615-100950T.

To replace damaged fuses in the VT drawout unit or CPT fuse drawout units:

1. Follow the procedures outlined in either Voltage Transformer (VT) Drawout Unit Inspection or Control Power Transformer (CPT) Primary Fuse Drawout Unit Inspection to withdraw the appropriate fuse drawout unit.

2. Wearing personal protective equipment, such as insulated gloves and a face shield, grasp the fuse near the fuse clip and pull while rotating the fuse.

3. Insert the fuses one end at a time into the fuse clips.

4. Follow the racking procedures outlined in either Voltage Transformer (VT) Drawout Unit Inspection or Control Power Transformer (CPT) Primary Fuse Drawout Unit Inspection to return the unit to the CONNECTED position.

Install all of the circuit breakers to the TEST/DISCONNECT position with their secondary disconnects engaged:

1. Remove the ground from the main and feeder circuits

2. Close the compartment doors.

3. Connect the control power source.

4. Close the main source of power and operate each circuit breaker electrically in the TEST/DISCONNECTED position.

5. If all controls are functioning properly, disconnect the secondary control plugs.

6. Rack the circuit breakers into the CONNECTED position.

7. Close the circuit breakers and resume normal operation.