Part 1 of the DIN EN 61347 (VDE 0712) standard series applies for general and safety requirements for lamp controlgear for use on d.c. supplies up to 250 V and/or a.c. supplies up to 1 000 V at 50 Hz or 60 Hz. The standard also covers lamps which are not yet standardized. Tests dealt with in this standard are type tests. Requirements for testing individual lamp controlgear during production are not included. Requirements for semi-luminaires are given in DIN EN 60598-1 (VDE 0711-1) (see definition 1.2.60). In addition, Annex B sets out general and safety requirements applicable to thermally protected lamp controlgear. Annex C sets out additional general and safety requirements as they apply to electronic lamp controlgear with means of protection against overheating. Additional requirements for built-in ballasts with double or reinforced insulation are given in Annex I. It can be expected that lamp controlgear which do not correspond to this standard do not impair security if they are operated with supply voltages between 90 % and 110 % of their rated supply voltage either as an independent apparatus or in luminaires which correspond with the safety standard DIN EN 60598-1 (VDE 0711-1) and the corresponding part DIN EN 60598-2-x (VDE 0711-2-x) and with lamps which correspond with the requirements of the corresponding standards for lamps. Performance requirements might require tighter limits. The Subcommittee responsible for this standard is UK 521.3 "Geräte für Lampen" ("Auxiliaries for lamps") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.