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Hi FacEngrPE and Waross, Thanks for the advices.

Hi Waross & LionellHutz, Thanks for the feedback. I will keep monitoring it.

waross, The machine size for 800A. The operation consumption is less than 200A.

3DDave, Is incandescent bulbs. My curious is why it flickering happen when the phase angle control output >=93%

LionelHutz, We monitor the waveform for different output percentage. The waveform is similar.

Hi all, I am controlling a rectifier (AC to DC) for a sintering process with a SCR phase angle control. Everything is normal at the beginning. But things go wrong when the SCR sending output command 93% or higher. Noise is coming out from the rectifier and then Eearth Fault Relay tripped the...

Hi all, I am facing power source tripped due to current leakage in my Vacuum Sinter Press machine. The scenerio is below: Incoming power: 3 Phase 415, 800A, no neutral Rectifier: 500kVA to convert the AC to DC 4.6V Rectifier frame is connected to ground. The SCR control mode is phase...

Hi Eddy, Thanks for your reply. Great information. Regards, Frankie

Hi all, I am trying to convert a project file from ETAP to SKM. Below is the ETAP utility operating value and also SC value. Which value I should key in to SKM setting? Should be SC value, right? The analysis should consider the higher current that go the system. Correct me if I am wrong.

Hi all, Thanks for all the knowledge sharing. I found that I never key in the device interrupt rating of the protective device and cause the device's protection failed. The protection covered by higher device in this case. Once I key in the interrupt rating, the result made more sense to me...

hi wcaseyharman, Thanks for your advice. I found it. Seem like the analysis only can go up to 5 levels. I modified the on line diagram, and found the tripping device (SHV8 Relay). If base on the new report and TCC drawing, can I say the tripping point as what I circled. Or I understand wrongly...

hi wcaseyharman, Thanks for your reply. I went to analysis report after have your reply. It is due the main device failed and use upstream device. Another question, SKM can look for higher upstream device if immediate upstream device failed? I went through the configuration, seem there dont...

Hi all, I am new to SKM and arc flash analysis. I am currently trying to convert a project from ETAP to SKM PTW. After did the conversion and run the analysis, the result puzzle me. The result after transformer is 33.52 Cal/cm^2. After the LV-51ACB, the AF IncidentEnergy dropped to 1.32...