what is the solution Line Voltage drops
what is the solution Line Voltage drops
(OP)
i am working in middle east one of the steel company, we have Electric Arc furnace of danieli,we are supplying the 33 KV Line voltage to Furnace side,we have all compensation equipments SVC everything is running smoothly, only the problem is when the Furnace arcing time ( power ON )the Line voltage Drops and becomes 30~31 KV, while furnace stop time its OK, Furnace area side they have Furnace transformer from 33kv/400V ETC. WE Have another Furnace same type but there is no any problem like this.
i appreciate evrything response from Forum guys
i appreciate evrything response from Forum guys






RE: what is the solution Line Voltage drops
RE: what is the solution Line Voltage drops
Regards
Marmite
RE: what is the solution Line Voltage drops
RE: what is the solution Line Voltage drops
2. High distortion in the arc furnace current, causing high distortion in the voltage. Maybe made worse by resonant conditions at some harmonic frequencies.
RE: what is the solution Line Voltage drops
First, rule out differences in the supply systems, like impedances (fault current available at the point of delivery) or regulator settings.
If that doesn't explain it, you'll have to look at the characteristics of each load (each furnace system). There could be differences in the current/voltage waveform distortion caused by the loads. Its possible that two identical supply and regulation systems will behave differently serving loads with seemingly the same MW and MVA but different THD.