Composite hollow-core insulators 3FH — apparatus housings for breakers, bushings and instrument transformers; detailed ratings on request

• Official product family under the insulator portfolio in the GT product hierarchy (Hollow Insulators, 3FH)
• Hollow-core composite construction: a resin-impregnated fibreglass tube provides the mechanical structure, with silicone-rubber sheds moulded or mounted on the outside — the housing technology the catalog's composite hollow-core arresters (3EQ series) also use
• Typical duties: housings for circuit-breaker poles, cable terminations, bushings, surge arresters and instrument transformers
• Family-specific dimensions, pressure ratings and creepage data are not part of the currently digitized document set — detailed ratings and drawings are available on request