This standard specifies the type test requirements for newly manufactured time switches for indoor use and with a working reserve. Its time switch is used for the control of electric loads, tariff meters and maximum demand indicators on specified days and times throughout the year. These time switches can work in various forms (including electronically). This standard does not apply to time switches that are remotely controlled or synchronized with radio frequency.
GB/T 9092-1998 history
2009GB/T 17215.421-2008 AC measurements - Tariff and load control - Part 21: Particular requirements for time switches
1998GB/T 9092-1998 Time switch for tariff and load control
GB/T 9092-1998 Time switch for tariff and load control was changed to GB/T 17215.421-2008 AC measurements - Tariff and load control - Part 21: Particular requirements for time switches.