Melt Furnace
- Thread starter augie47
- Start date
- Status
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
I think Besoeker did something like this, arc blast furnaces or such.
mayanees
Senior Member
- Location
- Westminster, MD
- Occupation
- Electrical Engineer and Master Electrician
power guy
power guy
I'm a power system fault, coordination and arc flash guy Augie. Melt furnaces are controlled arc flash sources.
I know they're low power factor loads, and need a stiff Utility power source, or they'll reak havoc on Utility distribution systems.
I'm on the road all day tomorrow, but would be happy to provide an assist Thursday, if it's up my alley.
IM/PM me.
John M
power guy
I'm a power system fault, coordination and arc flash guy Augie. Melt furnaces are controlled arc flash sources.
I know they're low power factor loads, and need a stiff Utility power source, or they'll reak havoc on Utility distribution systems.
I'm on the road all day tomorrow, but would be happy to provide an assist Thursday, if it's up my alley.
IM/PM me.
John M
I've had some dealings with arc furnace controls.
But quite a long time ago - the steel industry in UK has all but vanished.
masterinbama
Senior Member
- Location
- Huntsville Alabama
Is it an arc or induction furnace?
No even sure about that, From conversations, I assume ARC, Right now its a hole in the ground amd some 161k towers going up.
The preliminary print shows an AIC SCR furnace controller.
The drawings show some unusual grounding about which I have questions,
At 4,350 kVA it seems a bit small for an arc furnace.
The ones I dealt with were in the tens of MW. The last was a 114MW.
They had a dedicated 132kV supply, separate from the rest of the steel mill.
On another tack, 4350 kVA isn't 8kA (assuming the supply is 575V 3ph).
mivey
Senior Member
two transformers, not one.
Point now noted and appreciated, thanks.
Most of the controversy revolves around bonding.
The (2) 575 v transformers are customer owned and supplied by customer owned 12kv so we are dealing with an SDS.
The furnace folks are adamant about the grounding means so as to "prevent ground loops".
They want no grounding, grounded, bonding conductors routed thru the conduits or the cable tray.
All grounding is accomplished by an extensive grounding grid with singular runs to each piece of equipment to a common ground buss.
The (2) 575 v transformers are customer owned and supplied by customer owned 12kv so we are dealing with an SDS.
The furnace folks are adamant about the grounding means so as to "prevent ground loops".
They want no grounding, grounded, bonding conductors routed thru the conduits or the cable tray.
All grounding is accomplished by an extensive grounding grid with singular runs to each piece of equipment to a common ground buss.
- Status