Some of the selected system expansion and economic studies successfully completed are:
Lembaga Letrik Sabah (LLS) - Sabah Power Development Master Plan Study to Year 2000
Arthur D. Little - Energy Study for Industrial Development in Sabah and Sarawak for Economic Planning Unit (EPU)/Sarawak Electric Supply Corporation (SECSO)/Sabah Energy Commission (SEC).
SECSO System Reliability Study for Kuching area.
KTA Tenaga undertook various studies on different transmission systems which includes:
Vector group standardization of all Lembaga Letrik Sabah (LLS) major power transformers.
Labuan Beaufort Interconnection Sdn Bhd; Sabah Gas Industries Power Plant - LLS Beaufort Substation 132kV double interconnection study to determine its performance and effects on LLS system.
Sabah East Cost 275/132kV Transmission Grid System and Liwagu Hydro Electric Power Plant 275kV Interconnection studies.