using discharge tubes with control electrode or semiconductor devices with control electrode

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases > without intermediate conversion into DC > by static converters > using discharge tubes with control electrode or semiconductor devices with control electrode

CPC:

Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases > without intermediate conversion into DC > by static converters (controlling transformers, reactors or choke coils, e.g. by tap changing H02P13/00) > using discharge tubes with control electrode or semiconductor devices with control electrode

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

IPC defines codes here since 1974.

Child Classifications

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H02M 5/225 CPC only CPC only
H02M 5/25 using devices of a thyratron or thyristor type requiring extinguishing means since 1974 IPC+CPC Available in IPC and CPC
H02M 5/275 using devices of a triode or transistor type requiring continuous application of a control signal since 1974 IPC+CPC Available in IPC and CPC