🔹 Project & Contractual Milestones
- TCC – Transmission Completion Certificate
Issued when construction and installation of the transmission line are completed and the line is ready for testing/commissioning. - PAC – Provisional Acceptance Certificate
Issued after initial testing, commissioning, and energization, confirming the line is operational with minor pending items. - FAC – Final Acceptance Certificate
Issued after all punch-list items are closed and final documentation is submitted; marks full handover to the client.
🔹 Design & Engineering
- PTS – Project Technical Specification
Client-issued document defining technical requirements, standards, and scope. - IFC – Issued For Construction
Approved drawings/documents used for actual construction. - EC – Engineering Control (or Engineering Change, depending on contract)
Controlled engineering documents issued for construction or revisions. - ROW – Right of Way
Land corridor required for transmission line construction and operation. - DTM – Digital Terrain Model
Digital representation of ground surface used for route and profile design. - P&P – Plan and Profile
Drawings showing the horizontal alignment (plan) and vertical ground profile of the transmission line. - Tower Spotting – (Not an abbreviation, but key term)
Process of selecting tower locations along the route.
🔹 Electrical & Transmission Line
- OHTL – Overhead Transmission Line
- D/C – Double Circuit
Two electrical circuits on the same transmission structure. - S/C – Single Circuit
- OPGW – Optical Ground Wire
Ground wire containing fiber optics for communication. - NFOC – Non-metallic Fiber Optic Cable
Underground fiber cable used inside substations or along routes. - SCADA – Supervisory Control and Data Acquisition
System for monitoring and controlling the power network. - BSP – Bulk Supply Point
High-voltage substation connecting transmission to distribution or generation. - LILO – Loop-In Loop-Out
Method of connecting a new substation by looping an existing transmission line through it.
🔹 Structural & Civil Engineering
- GA Drawing – General Arrangement Drawing
Shows overall layout and configuration of towers, gantries, or foundations. - GIS – Geographic Information System
Used for mapping, route selection, and land data.
🔹 Software & Tools
- PLS-CADD – Power Line Systems – Computer Aided Design and Drafting
Specialized software for transmission line design, sag & tension, and Plan & Profile generation. - STAAD – Structural Analysis and Design
Software used for tower and foundation structural analysis. - ETABS – Extended Three-Dimensional Analysis of Building Systems
Structural analysis software (sometimes used for gantries or substations). - SAP2000 – Structural Analysis Program 2000
Advanced structural analysis software. - ZWCAD – ZWSOFT Computer-Aided Design
CAD software used for drafting drawings. - AutoCAD – Automatic Computer-Aided Design
Drafting and drawing software. - MicroStation – (Brand name, not an abbreviation)
CAD software widely used for infrastructure projects.
🔹 Documentation & Management
- O&M – Operation and Maintenance
Manuals handed over at FAC stage. - QA/QC – Quality Assurance / Quality Control
- ITP – Inspection and Test Plan
- IR – Inspection Request
- MTC – Material Test Certificate
🔹 Miscellaneous / Common Technical Terms
- GPS – Global Positioning System
- IEC – International Electrotechnical Commission
- HV – High Voltage
- EHV – Extra High Voltage
