Jaipur, Rajasthan, India
Our Products
We cut; punch and V notch the Stack core/Transformer Lamination/Cut Lamination for Distribution & Power Transformer in our CNC Cut to Length Machines with auto stacking facility.
We have the facility to cut the CRGO lamination in geometrical shapes with 90 & 45 cutting angle, width up to 640 mm and length up to 3500 mm As manufacturing of transformer lamination involves a high degree of precision engineering, we always make every effort hard for significant quality checks of burr level, stack height, dimension and required weight.
The manufacturing of strips wound cores is a specialized process, which requires a high degree of precision. These cores are manufactured from selected coils of CRGO electrical steel to yield closely controlled electro-magnetic characteristics and dimensional accuracy. Cores are wound as loops (two halves with overlapping ends joined together to form loop in multiple layers of the wound core) after slitting is done as per the required shape depending upon the rating and specification of the transformer on design parameters on the Unicore wound making machines. The Machine automatically stops when the pre-decided dimension is reached. The cores are stress-relief annealed to restore the magnetic properties. The cores are bonded where necessary, to provide increased firmness.
Mangal Electrical produces high quality amorphous distributed gap (wound) cores according to Customer specification for single phase and three phase distribution transformer applications By using Metglas amorphous metal. Epoxy coating is applied to the some parts of the cores in order to get mechanical rigidity. And finally we can get the 80% lower No load losses as compare to CRGO Lamination.
Core losses have two components, one is eddy current losses, and the other is hysteresis Losses. The ratios of the losses are mentioned at table below for amorphous and CRGO Cores.
| Amorphous Core | CRGO Core | ||
| Eddy Current Losses | Hysteresis Losses | Eddy Current Losses | Hysteresis Losses |
| 33.00% | 67.00% | 67.00% | 33.00% |
| 1.3 x Linear loads | 1.8 x Linear loads | ||
The "active" part of the Transformer consists of the magnetic core with windings and accessories.
The laminations are stacked in steps, resulting in a circular core shape which gives the windings optimum radial support, especially during short-circuit conditions.
The core is clamped using structural steel clamps which provide high strength under both static (lifting and clamping) and dynamic (short-circuit) mechanical loads. The clamps are very lightweight for their strength and provide a smooth surface facing the winding ends, eliminating regions of high local electrical stress.
Optimum dielectric strength is achieved via processing in accordance with rigorous in-house quality procedures.
These prestress cement concrete ( PCC ) poles are also used for maintaining the different electricity distribution needs . These PCC poles are essentially made of concrete which are inevitably less costly and more economically maintainable than the conventional steel poles. They are of two types depending upon the end use of poles-low tensile and high tensile line. The latter is primarily used for transmission/distribution of electricity. These poles come in 8mtr, 9mtr & 11mtr length and 200 kg to 400 kg working load capacity .
Raw material used :
Manufacturing process :
Prestress cement concrete poles are essentially made of concrete. High tensile wire is inserted into the pre-designed moulds and stretched to reach a certain tension . Galvanized wire is fixed inside the mould for earthing following which a right proportion of concrete mix is poured. Then , the concrete is compacted through vibration to produce high strength concrete poles.
