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IGBT module, clearance and creepage distance on high-altitude

IGBT module, clearance and creepage distance on high-altitude

Infineon_Team
Employee
Employee
50 replies posted 25 likes received 25 replies posted

The altitude above sea level of an application affects the required clearance and creepage distance of IGBTs. For installations below and up to 2000 m IGBTs can be selected without any adjustments. Installations in higher regions require an adjustment. Below you can find the altitude correction factors for elevations above 2000 m. In the selection, the voltage of the IGBT Module should be not less than the product of the voltage designed for your application and the corresponding altitude correction factor specified blow.
Altitude Multiplication factor
2000 m ─ 3000 m : 1.14
3000 m ─ 4000 m : 1.29
4000 m ─ 5000 m : 1.48
5000 m ─ 6000 m : 1.70
6000 m ─ 7000 m : 1.95
7000 m ─ 8000 m : 2.25
8000 m ─ 9000 m : 2.62
9000 m ─ 10000 m : 3.02
10000 m ─ 15000 m : 6.67
15000 m ─ 20000 m : 14.50

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Guru_Prasad
Moderator
Moderator
Moderator
250 replies posted 100 solutions authored 25 likes received

Device selection voltage=Operating voltage*safety margin*altitude multifaction factor
Example-1
operating voltage=690V
Safety margin=50%
altitude multiplication factor 3500 meters =1.29
the device selection voltage=690*1.5*1.129=1335V
The selected device should have greater than 1335V

Example-2
operating voltage=690V
Safety margin=50%
altitude multiplication factor 2500 meters =1.29
The device selection voltage=690*1.5*1.15=1190V
The selected device should have greater than 1190V