CM600DU-24FA IGBT – Removal of RTC over-current protection
by The real-time current control (RTC) that can found in some IGBT modules is a protection against short circuits in f.ex. motor drives where they could …
Month: September 2016
Kaizer DRSSTC III update #6 – First full power test after removing RTC
After cutting out the bonding wires to the RTC circuit of the CM600DU-24FA IGBT bricks, which we thought could be one of the reasons that we …
Astro HVO-Vario G 38, teardown of a 862 MHz cable TV amplifier
These are highly modular cable TV amplifiers, they are set up by using a wide range of different insert cards with different frequency ranges or …
Finished project: Merlin Gerin PM700 power meter
Two days ago I conducted the first successful resistive load test of a 3 phase power meter that can measure voltage, current, power consumption, harmonic distortion …
Finished project: 3 phase 13A Lübcke variac
Yesterday I conducted the first successful resistive load test of a 3 phase 13 A variac stack that has been enhanced with safety and monitoring …