ABB produces transformers for all furnace applications, including long-arc (steel) and short-arc (ferro-alloy) operation.
A robust design guarantees mechanical strength for steel furnace operation and temperature control for continuous high loads in ferro-alloy operation.
For applications in excess of 1,500 V (>160 kA)
Installed base of over 10,000 MVA
A grounding transformer is usually associated with three-phase supply systems.
On a three-phase system, the neutral would be earthed either directly or through some limiting impedance - resistance. When the neutral point is not available or does not exist with a delta secondary winding of the transformer, a neutral point needs to be created. This is the purpose of the grounding transformer, which could consist of a zig- zag winding, or a two-winding star delta transformer where the star winding of correct voltage supplies an accessible neutral point when connected to the supply system.
Up to 2 MVA
High voltage up to 36 kV
Low voltage up to 0.69 kV
Classes E2, E3, C2, F1
Frequencies: 50 Hz, 60 Hz and 16 2/3 Hz
Cooling: AN / ANAN / ANAF
Insulation system temperature: F and H
Partial discharges <10 pC
Protection degree: IP00 - IP54
Variable speed drives are used to control the speed of rotation of electronic motors in many industrial applications. Typically these are pumps, ventilators, compressors, belt conveyors, rolling mills, paper machines and an innumerable amount of different machines used in manufacturing and other industries. VSDs are also used in power generation and gas expanders.
Low voltage VSDs are typically from 200 to 4,000 kVA for two-winding transformers
Low voltage VSDs are typically from 160 to 5,000 kVA for three-winding transformers
Power range for MV drives is typically 500 kVA - 40 MVA
Drive Isolation Transformers are designed to meet the rugged demands of both AC and DC variable speed drives and also provide the required voltage change.
The separate primary and secondary windings provide electrical isolation between the incoming line and the SCR load. The windings are designed to withstand overcurrent of 150% of the rated load for 60 seconds or 200% of the rated load for 30 seconds.
Drive Isolation Transformers are sized to match standard motor horsepower and voltage ratings.
Standard sizes range from 5 to 600 HP in six standard voltages.
ABB dry-type transformers offer the best solution for railway applications, indoor or outdoor substation installations and rolling stock. The transformers can be installed close to the utilization point, which allows optimized installation design, minimizing the low voltage circuits with corresponding savings in losses and low voltage connections.
ABB is the technology leader providing the broadest portfolio of transformers suitable for installations inside a wind turbine either on the ground floor, at a first level, or in the most demanding location, the nacelle. The transformers are designed to withstand all types of ambient conditions including severe atmospheres of saline moisture, vibration conditions or heavy dust. Solar energy is climate-friendly, extensively available and full of potential. In the future, solar energy can make an important contribution to a sustainable energy supply. ABB offers an ideal dry-type transformer for this particular application, with versatile utilization options.