Lamps, indicators
Incandescent lamp SM-28-4.8 is designed for use in navigation equipment, for cabin lighting.
Nominal voltage: 28 V
Nominal power: 4,8 Wn
Luminous power: 32
Average burning hours: minimum 150 h
Lamp cap type: B9s/14
The lamp is designed for work in direct and alternate current networks with frequency 50 Hz.
Operating conditions
The lamp is meant for work in decreased atmospheric pressure and increased relative humidity (up to 98%).
Lamps are used at nominal voltage. Lamps can be used at different voltage, but in this case burning hours and luminous power are decreased greatly.
Safety engineering requirements according to standards 12.2.007.0-75 and 12.2.007.13-88.
