| 摘要 |
PURPOSE: A current measuring module in an apparatus for testing a power semiconductor module is provided to reduce parasitic inductance caused by connection lines, thereby accurately measuring currents flowing in a busbar. CONSTITUTION: A first current transformer comprises a first ring shaped core(610) and a first coil(620). A first busbar(402) passes the first ring shaped core. A first connection line(630) is connected to both ends of the first coil. The second current transformer(750) comprises a second ring shaped core. The second current transformer detects currents outputted from the first current transformer.
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