Power system studies

• Load Flow, voltage drop and short circuit analysis using computer software [IEC, ANSI]
• Relay setting calculations and Protection Coordination study [IEC, ESI]
• Arc Flash Hazard Analysis and Arc-flash labelling
• Insulation Coordination & Switching surges studies
• Earthing design calculations [IEEE80]
• Lightning Protection calculations [IEC62305]

• Substation Equipment sizing calculations
• Cable sizing calculations
• Cable schedules and control cable termination schedules
• Sag &Tension calculations for distribution system over-head lines
• Cable ladder/tray sizing and route layout design
• Lighting design calculations

• Live Line Testing for recording relay responses to High Impedance fault detection
• Earthing Tests for Power Plants, Utility and Industrial substations (MV to EHV systems)
• Power Quality measurements and analysis
• Arc flash energy & boundary calculations, labels and Worker’s PPE recommendations
• Current Limiter applications in electrical networks
• Field Analysis e.g. equipment leakage current compliance to relevant Standards, cause
• of fire / overheating in capacitor bank / de-tuning reactor panels, fan motor starting etc.
• HAZOP Studies 

• Soil resistivity measurement [Wenner Method and IEEE80]
• Ground Potential Rise (GPR), Step & Touch Potential measurements [IEEE81]
• Harmonic measurements [IEEE519]
• Cable route survey
• Site survey for electrical and mechanical utilities
• Site supervision for installation of Earthing and Lightning system
• Site supervision of electrical works for LV and MV systems including for cabling works
• Site supervision for HVAC and fire-fighting installation works 

• Onsite protection issues resolving
• Third-party inspection of MV/LV system installations
• Independent provider of Root Cause Analysis (RCA) for technical issues (Electrical & Mechanical)
• Factory inspection visits for attending Factory Acceptance Test (FAT).
• Electrical Safety Audits 

TWINVEY undertakes the following liaising services: 

Liaising work with Utilities for the Consumers: Obtaining NOC for additional power (which includes site survey and understanding electrical system) and Obtaining approvals for Distribution system drawings (Single Line Diagram, Layouts, Load Schedule, Cable route drawings etc.)