Baker D30R, User Manual

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Principles of Surge Testing
12/3/2009 | 71-022 V6
D30R 42
IGBT switching technology
Insulated Gate Bipolar Transistors (IGBTs) are used in the D30R surge testers to make a very
fast high voltage switch, which is the heart of the surge impulse generator. These IGBT
devices are very fast switching transistors. These are often found in variable speed motor
drives and are used in the D30R in much the same manner as in the drives. However, Baker
Instrument Company, an SKF Group Company has uniquely configured many IGBT devices in
series to form the high voltage switch. With the fast switching characteristics of the IGBT
transistors, the rise time of each surge pulse is between 0.1 and 0.2 micro-seconds.