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- PBS - Two-Channel Ignition
PBS - Two-Channel Ignition
PBS ignition is designed to generate voltage impulses for two spark plugs, in the spark gap of which the jumping spark ignites the fuel-air mixture in the APU turbine combustion chamber.
- Service life: 8 years or 3,000 starts with starts lasting 30 seconds
- Expected technology life cycle: 25 years or 9,000 starts with starts lasting 30 seconds
The ignition device has two separate channels. Each channel consists of a free oscillation convertor that charges the capacitor. When the internal spark gap voltage is reached, the energy accumulated in the capacitor is discharged in the spark plug. The frequency of discharges depends on the supply voltage; at 14 V it has a minimum value of 3 Hz, while at 30 V the maximum value is 7 Hz.
- Technical parameters: Values
- Rated voltage: 28 V DC
- Nominal current consumption: < 3 A
- Input voltage: 14 V DC ÷ 30V DC
- Output voltage: 2,5 ÷ 3 kV
- Delivered power: > 0,6 J
- Discharge frequency at 14V DC: 3 Hz ÷ 6 Hz
- Discharge frequency at 30V DC: 4 Hz ÷ 7 Hz
- Operating temperature: -55 ÷ 100°C
- Weight: 1,1 kg
- Type of operation: intermittent (with the option of permanent operation)
Compact design with minimal maintenance requirements
The PBS single and dual channel ignition weighs 0.55 and 1.1 kg respectively; a compact device that can handle up to 3,000 starts with a startup of 30 seconds until inspection.
High reliability
The total expected service life is 25 years or 9,000 startups with a 30-second startup time.