Innovations in load break switching and vacuum interrupter technology expanded SF6 switch line to include 600A puffer style switches and combination load and fault interrupting switches using vacuum interrupters (PVI style). Microprocessor automatic transfer controls were added. Cable accessory line expanded with the next generation pre-assembled termination (Slip-on II) to 35kV, 220kV terminations and joints for solid dielectric cables and a 138kV transition joint for low pressure, fluid filled cables. G&W entered into the recloser market with an SF6 overhead design to 38kV. The company became ISO 9001 certified in 1993 and opened a manufacturing operation in Shanghai, China in 1997. John H. Mueller became President in 1994.