Square D Type VR Vacuum Circuit Breaker Instruction Bulletin 6055-33

Schneider Electric / Square D instruction bulletin 6055-33 (03/2012) for Type VR vacuum circuit breakers — 4.76 kV, 8.25 kV and 15 kV at 3000 A / 50 kA, and 4.76 kV and 15 kV at 1200, 2000 and 3000 A / 63 kA. Covers receiving, handling and storage, description of the stored-energy operating mechanism and control circuit, initial preparation, manual open and close, hi-pot (dielectric) testing, racking in and out, operation, maintenance, vacuum interrupter inspection and replacement, contact gap measurement and lubrication — with the contact gap and hi-pot values given separately for the 50 kA and 63 kA builds. Supersedes the 1995 bulletin 6055-31 for these ratings. Trilingual (English / Spanish / French), 113 pages.