DIFF Subgroup
H05B 47/20 Responsive to malfunctions or to light source life; for protection
Introduced: January 2020
Full Title
Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant > Responsive to malfunctions or to light source life; for protection
IPC and CPC are identically structured here. All 7 subcodes exist in both systems.
IPC defines codes here since 2020.
Child Classifications
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- H05B 47/21 of two or more light sources connected in parallel since 2020 +1 CPC IPC+CPC Available in IPC and CPC
- H05B 47/23 of two or more light sources connected in series since 2020 +1 CPC IPC+CPC Available in IPC and CPC
- H05B 47/24 Circuit arrangements for protecting against overvoltage since 2020 IPC+CPC Available in IPC and CPC
- H05B 47/25 Circuit arrangements for protecting against overcurrent since 2020 IPC+CPC Available in IPC and CPC
- H05B 47/26 Circuit arrangements for protecting against earth faults since 2020 IPC+CPC Available in IPC and CPC
- H05B 47/28 Circuit arrangements for protecting against abnormal temperature since 2020 IPC+CPC Available in IPC and CPC
- H05B 47/29 Circuits providing for substitution of the light source in case of its failure since 2020 IPC+CPC Available in IPC and CPC