Necessary to optimize voltage-current ratio, minimize losses, stabilize grid, and interconnect regions.

A Unit Auxiliary Transformer (UAT) feeds the turbine-generator island and plant auxiliaries directly from the generator output during normal operation. Loads include pumps, fans, heaters, controls, and balance-of-plant equipment. It works with a Station Service Transformer for startup and blackout recovery.

For a transformer, apparent power output is calculated as S = V? × I? for single phase, or S = ?3 × V? × I? for three phase, where V? is the secondary line voltage and I? is the line current. This gives kVA or MVA. Real power output is P = S × power factor. When calculating, engineers use rated voltages and currents from the nameplate for maximum output, or measured load values for real operating power. They also consider efficiency, since some input power is lost as heat and not delivered to the load.

Voltage class, MVA rating, losses guarantees, materials, customization, logistics, and commodity cycles influence pricing.

In grid infrastructure, electrical power transformers are defined as primary assets that interface different voltage levels and network segments. They must satisfy grid codes for voltage regulation, reliability indices, and fault performance. Their design is standardized around insulation levels, short-circuit capability, loss targets, and monitoring provisions. They are typically owned and maintained by utilities or transmission operators and are subject to rigorous asset management practices, including condition monitoring, diagnostics, and long-term planning.

During refurbishment, AC/DC converters or rectifier transformers undergo insulation resistance tests, polarization index, winding resistance, TTR, and often dielectric tests (applied and induced voltage). Oil-filled units get DGA and oil breakdown tests. Special attention is paid to DC stress patterns on insulation and rectifier connections. Visual inspection checks for thermal damage, loose connections, and contamination. Based on results, insulation drying, re-gasketing, and component replacement may be performed before final high-potential and functional tests.

TOR-80 and TOR-100 testers are automatic BDV measuring devices compliant with IEC 60156. Each unit includes a test cell, control software, and optional calibration set. Manual and pricing will be provided.

The CMM-6RL is a transformer oil regeneration plant with a capacity of 6 m³/h. It removes acids, sludge, and oxidation products, restoring dielectric strength and color. We will send you pricing, lead time, and a technical datasheet upon request.

The CMM-4 mobile oil processing unit purifies transformer oil at 4 m³/h and can operate directly with energized transformers. A quotation will include pricing, delivery, and technical data.

The CMM-G unit is designed for wind turbine gearbox oil changing and filtration. It includes heating, fine filtration (up to 3 µm), flow control, and safe oil draining/refilling at height. Power supply options: 400-480V, 3-phase. Typical lead time is 6-8 weeks.