Set SeriesPIX StandardMedium Voltage Distribution 12-17-24 kVAir-insulated Switchgear with Vacuum Switching Devices – User Manual PDF
GEX2563900SWE-00(NORDICS)

Treatment of Firmly Screw-Connected Contact Surfaces

WARNING
hazard of incorrect contact area treatment
  • Caution when handling bars insulated by heat-shrinkable sleeves: the heat-shrinkable sleeve must not get into contact with lubricant (swelling).
  • Contact areas coated with lubricant KL should not be touched, if possible.
  • Contact areas must be subjected to preliminary treatment before screw fastening (refer to the table below).
  • Immediately after the preliminary treatment, coat contact surfaces completely with a thin and uniform film of lubricant KL.
Failure to follow these instructions can result in death, serious injury, or equipment damage.

Follow the below steps for treatment of firmly screw-connected contact surfaces:

  1. Contact areas must be subjected to preliminary treatment before screw fastening (refer to the Table).

  2. Immediately after the preliminary treatment, coat contact surfaces completely with a thin and uniform film of lubricant KL.

Material of contact surfaces

Pre-treatment

Silver-plated contact surfaces

Clean(1)

Nickel-plated contact surfaces

Remove passivation layer(4)

Copper or copper alloy

Clean(1), expose metallic surface(2)

Aluminium

Clean(1), expose metallic surface(2)

Steel

Clean(1), expose metallic surface(2)

Zinc-plated steel

Remove passivation, not the zinc layer(3)

Hot-galvanized sheet-metal

Clean(1), passivation need not be removed

(1) Clean by means of lint-free cloth; use cleaning agent in case of serious contamination (see above).

(2) Expose metallic surface.

  • a) by treating the entire surface with emery cloth or a rotating grinding tool (grain-size 100 or 80) or.
  • b) using a wire brush which is clearly marked for use exclusively for aluminium or exclusively for copper.

(3) Using a brass brush, steel brush.

(4) Rub slightly by hand using Scotchbrite abrasive agent (Ni layer must not be reduced).
QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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