Output voltage of VFD
Output voltage of VFD
(OP)
Hello all
Have anyone ever seen the DC output voltage(Line-Ground) of an 3 phase inverter when we supply with 380Vac(L-L),but don't send any starting command and speed reference is still 0 HZ?
I 've measure this DC output voltage for all 3 phase,and it show 230Vdc(L-G) and 0 Vdc(L-L) ,but no any AC voltage appear at the output both L-L and L-G. Anyone please help me explain this phenomenon. (Inverter is ABB,ACS400)
Thank you in advance.
Psit P.
Have anyone ever seen the DC output voltage(Line-Ground) of an 3 phase inverter when we supply with 380Vac(L-L),but don't send any starting command and speed reference is still 0 HZ?
I 've measure this DC output voltage for all 3 phase,and it show 230Vdc(L-G) and 0 Vdc(L-L) ,but no any AC voltage appear at the output both L-L and L-G. Anyone please help me explain this phenomenon. (Inverter is ABB,ACS400)
Thank you in advance.
Psit P.





RE: Output voltage of VFD
RE: Output voltage of VFD
As I informed above,I measure the voltage at terminal U2,V2 and W2 .Only (-)230V DC appear between line to ground.From the principle of inverter,if one polarity of DC bus is connected to ground,should the voltage appear when IGBT output were fail or leakage occur?
In addition,there are no any faults occur on the display of ACS400.
Further comments,please suggest.
Regards
Psit P.
RE: Output voltage of VFD
RE: Output voltage of VFD
RE: Output voltage of VFD
RE: Output voltage of VFD
RE: Output voltage of VFD
RE: Output voltage of VFD
RE: Output voltage of VFD