Very low (0.05-0.2 lagging) due to dominant magnetizing reactive current.

They typically show three-phase tanks with radiators, bushings, surge arresters, and overhead or bus duct connections. Grounding grids, fences, and warning signs indicate safety measures. You may see associated equipment like CTs, VTs, and protection panels nearby. Images also display clearances between phases and to structures, reflecting insulation requirements. Overall, photographs provide a visual summary of how the transformer is integrated physically and electrically into the substation layout.

Step-up transformers raise generator output to transmission voltages (e.g., 11-20 kV up to 110-765 kV). Higher voltages reduce transmission current and losses, enabling efficient bulk transfer across long distances.

Maintaining optimal oil condition is critical to transformer reliability and longevit

In South Africa power transformers are used by the national utility, municipal distributors, mining operations, mineral processing plants, petrochemical complexes, heavy manufacturing, commercial developments and transport infrastructure such as rail and ports. Renewable energy projects, especially solar and wind farms, also deploy many transformers for grid connection. Because of long distances and remote locations, mining and rural electrification rely heavily on robust transformers that can withstand harsh environmental conditions and limited maintenance access.

Hyundai Power Transformers USA units, like other large transformers, are subjected to thermographic inspections to identify abnormal hot spots on bushings, connections, radiators and tank surfaces. Infrared imaging reveals loose joints, overloaded components, cooling problems and developing faults without taking the transformer out of service. Early detection allows targeted maintenance before insulation damage or winding failures occur. For utilities, periodic thermography is part of condition based maintenance programs that extend transformer life and prevent costly unplanned outages in the transmission and distribution network.

Dry-type transformers are used indoors in industrial plants, hospitals, malls, high-rise buildings, tunnels, offshore modules, and data centers due to reduced fire risk, lower maintenance, and no liquid dielectric handling.

An impact recorder tracks vibration, shock, tilt, and acceleration events that occur during transport, handling, and installation of a power transformer. Large power units are mechanically sensitive; excessive impacts can damage core clamping, winding supports, bushings, or OLTC mechanisms. Recorded data helps determine if a transformer experienced stresses outside manufacturer limits and whether additional inspections, DGA sampling, or electrical tests are required before energization.

A diagram typically shows the core, primary and secondary windings, tap changer, terminals, and sometimes internal connections to bushings, CTs, and VTs. Schematic diagrams indicate winding relationships, vector groups, and phase shifts. Mechanical drawings depict dimensions, cooling equipment, and mounting points. Together, these diagrams help engineers understand electrical behavior, mechanical layout, clearances, and interfaces needed for installation, protection, and maintenance planning within the overall power system design.

GlobeCore is interested in partnership for the KPLC tender. We can supply transformer oil handling and purification plants meeting international standards. Please provide tender documentation and technical scope so we can submit a compliant quotation.