This standard specifies general performance requirements for electronic ballasts for use on d.c. supplies having rated voltages not exceeding 250 V, associated with fluorescent lamps complying with IEC 60081. It shall be read in conjunction with IEC 60924.
Performance requirements for electronic ballasts for general, public transport and aircraft lighting are specified in Sections Two, Three and Four of this standard.
NOTE 1 In order to obtain satisfactory performance of fluorescent lamps with d.c. supplied electronic ballasts, it is necessary that certain features of their designs be properly co-ordinated. It is essential, therefore, that specifica-tions for them be written in terms of measurement made against some common base-line of reference, which must be reasonably permanent and reproducible.
NOTE 2 These conditions may be fulfilled by reference ballasts. Moreover, the testing of ballasts for fluorescent lamps will, in general, be made with reference lamps and, in particular, by comparing results obtained on such lamps with ballasts to be tested and with a reference ballast as specified in IEC 60921.