This is not a plc question but I am sure with the amount of knowledge that is on this forum you can help me with the answer.
I work in an electro-plating facility and we use rectifiers to get our DC for plating these are just like any DC supply but on a bigger scale (15vdc 10000 amp) any way they work by firing SCR's to a three phase transformer out of the other side through diodes with a cap. bank ect.... anyways I have one rectifier that when not under load the voltage at the anode and cathode jumps up to about 18 volts under load it drops back down to around 10 volts like it should. the controls for the rectifer are just potentiometers (sorry if it is misspelled) and a SCR control board the control voltage does not change ever. I do not expect that anybody has this exact sceaneiro but like I said it is the same as any other variable DC supply. If anybody can give me some ideas of what could be causing the voltage to jump up when not under load it would be helpful.
thanks in advance
I work in an electro-plating facility and we use rectifiers to get our DC for plating these are just like any DC supply but on a bigger scale (15vdc 10000 amp) any way they work by firing SCR's to a three phase transformer out of the other side through diodes with a cap. bank ect.... anyways I have one rectifier that when not under load the voltage at the anode and cathode jumps up to about 18 volts under load it drops back down to around 10 volts like it should. the controls for the rectifer are just potentiometers (sorry if it is misspelled) and a SCR control board the control voltage does not change ever. I do not expect that anybody has this exact sceaneiro but like I said it is the same as any other variable DC supply. If anybody can give me some ideas of what could be causing the voltage to jump up when not under load it would be helpful.
thanks in advance