A world-first 765 kV auto-transformer featuring constant-flux voltage regulation has been installed at the Mansehra Substation Project by POWERCHINA, marking a significant milestone in Pakistan’s power transmission development, according to a Gwadar Pro's report on Friday.

A POWERCHINA's statement stated, the weighing 225 tonnes, the single-phase, auto-coupled transformer is equipped with an on-load tap-changing system and a three-stage cooling mechanism.

It sets a new benchmark among AC transformers of its class, achieving both the highest step-voltage and the widest tap range.

The installation fills a key technological gap in Pakistan’s 765 kV extra-high voltage (EHV) transmission sector and signals that the country’s first substation operating at this voltage level has entered the core equipment installation phase.

Project officials said the development will strengthen grid stability and help address regional electricity shortages once the substation becomes operational.

The Mansehra project is part of Pakistan’s broader efforts to modernize its transmission infrastructure and improve energy efficiency.

The next phase will involve installing six additional main transformers, which is expected to further accelerate progress and support optimization of the country’s energy mix.

Upon completion, the substation is expected to play a vital role in enhancing power reliability and supporting long-term economic growth.

Credit: Independent News Pakistan (INP) — Pak-China