Electric arc furnace transformer
Main function and characteristic
Electric furnace transformers are transformers which supply power to the electric furnaces. It can drop high
voltage to the working voltage the electric furnaces need.
There are many kinds of electric furnaces,so there are many kinds of electric furnace transformers cooperating
with them.Now,our company manufactures following electric furnace transformers:electric furnace transformers
used in steelelectric furnaces(including on-laod,no-load and enclosed reactor) ; mineral hot furnace
transformers used to smelt kinds of iron alloys,hydrosilicons,carbides,etc(single phase,three phases on-load
and no-load tap changer).They are low loss and energy-saving products.Cooling methods are self-cooling,
forced oil water cooling, etc.It can be designed specially according with customers' requirements.
The model of the electric furnace transformer is expressed as follows:
The meaning of model:
H--Steelmaking arc furnace,HJ--ladle furnace,HZ--electro-slag furnace,HC--calcium carbide furnace,HK--mineral
hot furnace,HG--line frequency induction furnace;
Number of phase:D--single phase,S--three phase;
Types of cooling device :ONAN,wind cooling F,water cooling S.
The methods of oil circulation:natural circulation,forced oilcirculation P.
Tap changer:off-circuit tap changer,OLTC Z.
Enclosed attached device:changing leakage flux,enclosed reactor K.
Rated capacity:KVA. max 140MVA
Voltage class:KV. 35KV
Product reference:
Technical parameters:
| 1.1.2 TRANSFORMER DATA |
| General data |
|
| Operating Voltage |
33KV±3% |
| Frequency |
50Hz±1% |
| Rated capacity |
144 MVA |
| Over load power |
144MVA plus 20%,30 min. |
| Rated primary current |
1049.7 A |
| Insulation Level (AC/LI) |
85/200 kV |
| Vector group |
D/d0 with booster regulation transformer inside. |
| Secondary connection |
Delta OPEN |
| System short circuit capacity at 33kV side. |
1100 MVA |
| Secondary outlet |
Terminals with Bus bars come out from top cover. 8 Buss bars by
epoxy resin arranged along with each phase with matching cite
transformer sizes. |
| Max. Secondary current |
Approximate 42120 A |
| Secondary voltage range |
950-500 V. |
| a) Constant power |
950V-822.4 V at 60 MVA |
| b) Constant current |
About 42062 A within 824V-500V |
| c) Short-circuit voltage |
8 % (at 950V,60MVA) |
| Type of tap changer |
On load tap-changer: |
| a) Manufacturer |
MR, |
| b) Number of tapes |
17 voltage steps with 18position See attached data sheet of 60
MVA EAF transformer. |
| c) Oil filter equipment for OLTC |
yes |
| Cooling |
OFWF |
Cases reference:
Transformer Production :
PACKING AND SHIPPING:
Our Best Service For You
| 1. |
Pre sale service |
| a. |
make technical solution |
| b. |
send quotation, technical data sheet and drawing |
| c. |
prepare power transmission plan, testing plan and shipment plan |
| 2. |
In sale service |
| a. |
supervise the manufacturing schedule totally in accordance with the plan |
| b. |
send photos to customer during every manufacturing process(hold point) |
| c. |
inform the customer one week before testing. |
| 3. |
After sale service |
| a. |
installation and commissioning, training the workers |
| b. |
quick response within 12 hours any time |
| c. |
provide 12 months guarantee period normally. |
Order Instructions
When you choose our company product, please offer following data:
Transformer model:
Rated capacity: kVA
Phase: Three-phase
Single-phase
Frequency: 50HZ
60HZ
Rated voltage ( H.V. / L.V. ):
Tapping range: ± × %
Insulation level: LI AC / LI AC kv
Veotor group: Dyn11
Yyno
Other
Short-circuit Impedance: %
Cooling method: ONAN
ONAF
Tapping method: OLTC
OCTC
Other
Other requirement:
Notes:
We also can design special products according to customer's particular requirements.
The final dimension is subject to outline drawing.
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