Crepe Kraft Paper Wrapped Stranded Copper Wire for Power Oil Immersed Transformer Internal Connection

• Insulation Level: B, E, A
• Certification: ISO9001, RoHS, VDE
• Application: Transformer, Instrument, Electrical Equipment, Motor
• Shape: Round Wire
• Conductor Material: Copper Wire
• Transport Package: Pallet
• Model NO.: ZB
• Specification: 12-250mm²
• Trademark: windoo
• Origin: China
• HS Code: 85441100
• Production Capacity: 2500t/Year

Product Description

The windings of large power transformers use combined conductors or transposed conductors, which can greatly reduce the load loss, reduce the temperature rise of winding hot spots, improve the mechanical strength of the windings, make the structure more compact, and make the coil processing easier. It has been widely used in the design and manufacture of large power transformer windings. The composite wire is composed of several insulated magnet wire or copper and aluminum wires arranged according to the specified requirements. The winding wire is wrapped by a specific insulating material.

1.    Conductor Material

Paper-covered copper twisted wire used 12.5mm Oxygen-free copper rod, alloy grade TU2, copper content ≥99.95%.

 

2.    Insulation Thickness

1.0mm

2.0mm

3.0mm

4.0mm

5.0mm

6.0mm

8.0mm

10.0mm

According to the customer request
 

3. Standard

GB/T 7673.3

IEC 60317-27

Customer Standard

 

4. Specification

Nominal cross-section/mm²	Core structure	Nominal cross-section/mm²	Core structure
10	12×7/0.39	125	27×12/0.70
16	12×7/0.49	150	14×19/0.85
25	19×7/0.49	160	27×12/0.80
35	19×7/0.58	185	27×12/0.85
50	19×7/0.68	200	37×12/0.75
70	27×7/0.68	250	37×12/0.85
80	37×7/0.62	300	27×19/0.85
95	37×7/0.68	315	37×19/0.75
100	37×7/0.70	400	37×19/0.85
120	27×12/0.68	500	37×19/0.95

Specifications beyond the above range, please contact us

Transposed conductor refers to the combination of a number of enameled copper flat wires into two rows with wide surfaces in contact with each other, and according to the requirements on the top and bottom of the two rows of enameled wires along the narrow side of the same direction of transposition, and electrical insulation tape is used. As a multi-layer continuous and tightly wrapped composition

 

The windings of large power transformers use transposed conductors, which can greatly reduce load loss, reduce the temperature rise of winding hot spots, improve the mechanical strength of windings, make the structure more compact, and make coil processing easier. It is widely used in winding design and manufacture.

 

In the production process of transposed conductors, there will be a problem of poor external dimensions of the transposed conductors. It is often found after the next process that it is irreversible, so that the product cannot be reordered. Winding process processing, adjusting the insulation structure affects the efficiency and product quality. Therefore, it is urgent to solve the existing problems of the large width and height of the transformer winding transposition wire, which is to solve the unqualified quality problem that the wire causes the transformer coil radial and lateral diameter to increase.