Transformers
Our experienced teams offer a range of Transformer services and assistance in the following areas:
- Crane Service Coordination
- Offloading and Positioning
- Oil Leak & Welding Repairs
- Installation & Assembly
- Oil Filling and Processing
- Electrical Acceptance Testing
- Transformer Relocation
- Retrofilling
- Degassing
- Dehydration
- Gasket & O-Ring Replacement
- Bushing Removal or Replacement
- Radiator Repairs or Replacement
- Online Filtering
- Repairing Online and Offline Tap Changers
- General Transformer Maintenance
- Testing of Insulating Oil
- Reassembly
A Large Power Transformer is a large, custom-built piece of equipment that is a critical component of the bulk transmission grid. Because LPTs are very expensive and tailored to customers’ specifications, they are usually neither interchangeable with each other nor produced for extensive spare inventories. Although LPTs come in a wide variety of sizes and configurations, they consist of two main active parts:
- The core, which is made of high-permeability, grain-oriented, silicon electrical steel, layered in pieces; and
- Windings, which are made of copper conductors wound around the core, providing electrical input and output.
Two basic configurations of core and windings exist: the core form and the shell form. In the usual shell-type power transformer, both primary and secondary are on one leg and are surrounded by the core, whereas in a core-type power transformer, cylindrical windings cover the core legs. Shell form LPTs typically use more electrical steel for the core and are more resilient to short-circuit in the transmission systems and are frequently used in industrial applications.
Other parts include transformer bushings, which connect LPTs to transmission lines, as well as tap changers, power cable connectors, gas-operated relays, thermometers, relief devices, dehydrating breathers, oil level indicators, and other controls.
Power transformer costs and pricing vary by manufacturer, by market condition, and by location of the manufacturing facility.
