DC Power Tests Sample Clauses

DC Power Tests. ‌ Testing DC products is possible through the use of the optional DCR600-20 output module. The DCR module takes three phase AC power and rectifies it do a DC output. By programming the AC voltage, the DC output voltage can be controlled indirectly. 1.2.1 DCR Option module‌ The AC/DC rectification performed by the DCR module results in a DC output that not identical in level to the AC RMS value programmed but rather will be about two times higher when using a three phase AC square wave output. Thus, to get 270V DC, program a Line to Neutral voltage of around 135Vac on all three phases in 3 phase mode and select a square wave (Waveform no. 3) instead of a sine wave. This will provide the least amount of AC ripple on the DC output. The DC test sequences were developed with this scaling and waveform selection built in so the correct DC output voltages are obtained. Due to the DCR rectifier’s forward voltage drop, the AC to DC scaling ratios are different for 28Vdc testing versus 270Vdc testing and this is also built in to the provided test sequences.