SM66‑24 features compact 450‑mm‑width cabinet, visible double isolation breaks, modular five‑anti‑interlock & emergency unlock. IP67 gas‑tank with annual leakage ≤0.01%, dry‑air insulation and good mechanical endurance, complying with relevant IEC & GB RMU standards.

This oil‑immersed voltage regulator adopts ONAN cooling, on‑load tap‑changer with battery backup, Auto‑Local‑Manual operation mode and comprehensive alarm signal outputs. It complies with IEC 60076‑1/5/7/10/21, IEC 60137 and other standards, suitable for C5 high atmospheric corrosivity environment.

VD4/S adopts stored‑energy spring mechanism supporting auto‑reclosing, mechanical life 10 000‑15 000 operations, optional manual/motor charging, various releases and auxiliary switches. It complies with IEC 62271‑100, IEC 60694, also meets VDE and GB1984‑2003 requirements.

VSC is lateral fixed‑type indoor vacuum circuit‑breaker with simple‑reliable high‑endurance spring mechanism, optional counter & 8NO‑8NC auxiliary switch. Insulation medium, secondary wiring and ratings are optional with special dimension custom‑order available, complying with IEC 62271‑100 for MV circuit‑breakers.

TV70 earthing switch supports single‑pole / three‑group operation with manual crank, swing‑handle or motor drive. Blade moves parallel or perpendicular to base; mechanical & electrical interlock with disconnector is available. It refers to ANSI C37.30.1 Annex D, aligned with relevant IEC earthing‑switch standards for various site‑installation conditions.