This document specifies safety requirements for electronic controlgear for high-frequency operation of tubular cold-cathode discharge lamps used in signs and luminous discharge tube installations and operating with an output voltage exceeding 1 000 V but not exceeding 10 000 V for direct connection to DC or AC supply voltages not exceeding 1 000 V (at 50 Hz or 60 Hz in case of AC).
NOTE 1 Historically, for such type of controlgear it was referred to as invertors or convertors.
NOTE 2 In Japan, the output voltage of 15 000 V is acceptable.
This document applies only to either type A or type B controlgear which are specified as follows:
– Type A: controlgear operating within the frequency range 20 kHz to 50 kHz, and having an output voltage not exceeding 5 000 V peak between terminals, with a maximum output current limited to 35 mA (RMS) and 50 mA (peak value) and a supply voltage not exceeding 250 V.
NOTE 3 The output current of a type A unit may be considered as not presenting an electric shock hazard due to the limits on the current and frequency range.
NOTE 4 In Japan, the output voltage of 15 000 V is acceptable.
– Type B: controlgear operating within the frequency range 10 kHz to 100 kHz and having a no-load output voltage not exceeding 10 000 V between terminals or not exceeding 5 000 V to earth, with a maximum output current limited to 200 mA (RMS) and 400 mA (peak value).
NOTE 5 Type B require additional protection in the output circuit.
NOTE 6 In Japan, a type B unit exceeding 50 mA and/or the secondary grounded is not acceptable.
NOTE 7 In order to check the safety of controlgear, it is necessary to check their performance. However, since no standardization of the characteristics of neon tubes exists, reference loads are specified in this standard to ensure reproducible test results.
NOTE 8 The rated maximum operating temperature of the winding, tw, is not applicable to this standard.
Required fields are indicated with *