Aeronautics
Flight Termination System (FTS) for Aircraft
Aeronautics
Civil aeronautic applications
Pyrotechnic circuit breaker High Voltage / High Current
Safran and Pyroalliance both design and manufacture a large variety of highly reliable equipment for aerospace applications.
In the field of electrical propulsion for aircraft, electrical protection systems are mandatory safety elements to grant flight security. Fuse protection systems implemented as circuit-breakers are in particular very precious embarked devices to protect from risks of fire on board. Because of the extreme rapidity requested for circuit breaking in case of high voltage / high intensity, pyrotechnic actuation has been deemed the most relevant technology. Safran and Pyroalliance have therefore combined their skills and backgrounds to design a cutting-edge solution dedicated to that application.
ACTIVE FUSE PROTECTION SYSTEM
Benefits of pyrotechnics
- Ability to cut circuit with no current
- Max. short circuit current : 4000A under 800V
- Auto trigger on current threshold with settable integrated sensor
- Extremely short response time < 4 ms
- High reliability level over vehicle lifetime = 1-2.10-6 at 90% Confidence Level
- Compliant with aeronautical environment – DO-160G standard (standard level)
Aeronautics applications :
- Electrical propulsion for aircraft
Key figures of pyrotechnics performance
| TECHNICAL SPECIFICATIONS | TECHNICAL SPECIFICATIONS |
| DIMENSIONS (Pyro actuator): | 55 x 18 x 18 mm < 40 g |
| CONTINUOUS CURRENT: | 0 to 400 A Normal |
| MAX. SHORT CIRCUIT CURRENT: | 4000 A under 800 Vdc |
| PYRO- ALL FIRE CURRENT: | 1,75 A under 5 ms |
| PYRO- NO FIRE CURRENT: | ≤ 0,4 A |
| OPERATING TEMPERATURE: | -55°C / +90°C |
| RELIABILITY: | 99.999998% (90% CL) |
| STORAGE LIFE TIME: | 7 years |
| OPERATIONAL LIFE TIME: | 3 years |
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