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Electric Arc Furnace Transformer

Payment Type: L/C,T/T,D/P,Paypal,Money Gram,Western Union,D/A
Min. Order: 1 Piece/Pieces
Delivery Time: 120 Days

Basic Info

Model No.: HSSPZ-120000/35KV

Type: Furnace

Rated Voltage: 35kV

Standard: IEC

Additional Info

Packaging: Wooden Case or as Per Requirement

Productivity: 50000 Sets/Year


Transportation: Ocean,Land

Place of Origin: Ningbo China

Supply Ability: 500/year

Certificate: IEC Standard

HS Code: 8


Product Description

120MVA Electric Arc Furnace Transformer
The transformer specializes in power supply for various industrial electric furnaces.
Successful installation, testing, commissioning and start up the 125mva 35kv EAF transformer on 2008.
Our company mainly produce the following furnace transformer:
High impedance furnace transformer, DC arc furnace transformer, ladle refining furnace transformer, submerged arc furnace transformer (including ferroalloy furnace tran- sformer, calcium carbide furnace transformer, yellow pho- sphorus furnace transformer,single phase titanim slag furnace transformer etc.), electro slag furnace transformer, frequency induction furnace transformer, single-phase graphite furnace transformer, and includes resistance furnace transformer, EAF transformer and induction furnace transformer.etc.

our works are cover the design, manufacturing, factory testing of all transformers, export packing, shipping, insurance, custom clearance, transportation of transformers from the point of origin to the substation of buyer, and we guarantees for the transformers according to buyer required technical specification, and tender documents. and responsible to supply the guide drawings and information needed to prepare detailed civil works, designs and carry out erection, site testing, commissioning and storage of transformer and relevant material and equipment.

we will submit the following: Detailed data, information, drawings (drawing of active part, transformer and executional drawings), catalogues, manuals, directions on the method of handling, storage, mounting and erection of each piece of transformers shall be furnished. we also submit detailed procedure for full co-ordination with civil works. Complete and detailed site test procedures, drawings, manuals, and all necessary data shall be submitted for any equipment, each system, and each erection as a whole. All works shall be fully documented and submit for design review. All transformers should be tested based on IEC standard.

1. Transformer tank, radiators, pipes and conservator should be withstand full vacuum (during drying the transformer)
2. Load current wave shape of furnace transformer will be heavily distorted, will be encounter to load unbalance and will be subjected to frequent over currents. Therefore the manufacturer should be considered these operational conditions. Additional information will be given by client during design review, if necessary.
3. Suitable current transformers required for the operation of the thermal relays or the on load tap changing equipment should be supplied, whereas additional bushing type current transformers is not require for differential and overcurrent protection purposes. All bushing type current transformers shall be removable without removing the transformer cover.
4. The core shall be earthed at one point and the core stack shall be earthed internally through grounding links, routed on top of the core and should be accessible from the manhole on main tank cover or from top of tank to permit testing of insulation resistance between tank and core.
5. Each assembled core and coils shall be fixed in the tank in a proper way to withstand impacts and shakes during transportation. The minimum withstand capability shall be 3g at any direction. Impact recorders for recording shock forces during shipment and transport should be installed by manufacturer and can be returned back by the manufacturer after arrival at site. Impact recorders shall be approved by the buyer.
7. The tank shall be provided with manholes of suitable size to afford easy access to the tap changing mechanisms, lower ends of bushings, current transformers, terminals, and the upper portions of the coils.
8. The cover construction shall include some manholes. Each manhole shall be of sufficient size to permit entry of a 0.5 m diameter sphere. Manholes for giving access to internal bushing connectors shall also be provided. All cover openings shall have an upright edge of not less than 5 Cm , and gaskets which can be used again after opening (rubber type, not glued).
9. Adequate number of (to be approved by the Engineer at least four) attaching plates for jacks shall be available and permanently marked on the tank e.g. through welded arrows or in another equivalent design. The attaching plates shall be located at a height above the service level to be approved by the Engineer.
10. All mechanical relays (Pressure relief devices, Buchholz relay, thermal relays, and etc) should be equipped with alarm and trip contacts suitable for operation on the station service supply voltages. Leads from the contacts shall be run in rigid conduit and terminated in the terminal cabinet
11. Each transformer shall be provided with two external ground pads, each with two tapped holes for connection to the ground bus. The size of grounding conductor is specified in Table I.
12. If not otherwise specified by buyer, the transformer shall be fixed permanently on the foundation in order to prevent any movement during operation due to vibration or earthquake. All provisions for such a fixing shall be foreseen and provided by the manufacturer whether to be a part of transformer or to be fixed on the foundation. A guide drawing for preparation of foundation of the transformers shall be prepared and submitted in due time by the manufacturer.
The method of fixing the transformer on foundation shall be designed and proposed by us and in this regard percussion shall be made that the bottom plate of tank shall not have the risk of corrosion due to raise or water on the foundation base and always inspection of the bottom plate to be possible and if it is necessary that some plates to be in touch with foundation, they shall be stiffener plates not main bottom plates. Guide drawing with indication of all ancillary equipment needed for fixing on foundation shall be prepared by the manufacturer.
13. The transformer tank shall be provided with at least following valves(in addition to those required for proper functioning of the transformer) :
a)Drain valve so located as to completely drain the tank with minimum sizes of 100mm dia.
b) One filter valve at top of transformer tank of 50 mm dia.
c) Two filter valves on diagonally opposite corners of 50 mm dia.
d) Oil sampling valves not less than 8 mm at top and bottom of main tank.
e) One 15 mm dia. release plug for gas/air on the top of the tank.
f) Two plugged pipe outlets equipped with shut off valve for applying and measuring vacuum. (One valve may be accepted)
g) Valves required for On-line monitoring system.
14. The operating mechanism of OLTC shall be protected in accordance with class IP54 of IEC. All of the control equipment shall be mounted in a suitable weatherproof cabinet on each transformer.
15. Manufacturer should recommend setting of all settable mechanical relays (for control and protection) during design review, based on real environmental site condition.
16. The purchaser reserves the option to reject the transformer and demand a new transformer if during tests or service, any of the following discrepancies in respect of guaranteed values come to light :
a) Measured losses exceed the guaranteed values by more than the tolerance allowed by IEC.
b) Percentage impedance measured exceeds the guaranteed value by more than tolerances indicated in IEC.
c) Oil or winding temperature rise exceeds the guaranteed values by 5°C.
d) If transformer fails in insulation tests (LIWV or SIWV) more than one time then
Acceptance of the transformer is entirely at the decision of the purchaser