Transistor ballast apparatus with a subdued-lighting circuit
A transistor ballast apparatus for fluorescent lamps, which has a high-reactance transformer for supplying the fluorescent lamps with heating currents and with the lamp current, is provided with a current-limiting resistor in the lamp circuit which can be bridged with the aid of a small protection c...
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| Format: | Patent |
| Sprache: | eng ; ger |
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| Zusammenfassung: | A transistor ballast apparatus for fluorescent lamps, which has a high-reactance transformer for supplying the fluorescent lamps with heating currents and with the lamp current, is provided with a current-limiting resistor in the lamp circuit which can be bridged with the aid of a small protection contact in order to be able to switch over between full lamp current and a reduced lamp current, for the purpose of varying the illumination intensity. |
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