ElectricalSoft | Calculation of Low and Medium Voltage Installations

Low and medium voltage electrical installations

• Cable sizing according to voltage drop, permissible current, and short-circuit criteria
• Protection with automatic circuit breakers according to IEC 60898-1 and IEC 60947-2, motor protection switches, and fuses type gG/gL and gPV
• Earth resistance with multiple configurations: ring, rods, plates, and pillars
• Calculation of maximum and minimum short-circuit with transformers, low and medium voltage cables, synchronous generators and limiting reactors, according to IEC 60909 for radial networks
• Time-current characteristic curves for protection devices such as fuses and modular/air circuit breakers
• Selection of installation systems according to conductors and cables
• Conduit characteristics according to installation system
• Earth faults in medium voltage with grounded and isolated neutral
• Capacitor bank calculation, c/k factor, resonance frequency, and transformer capacitors
• Performance, losses, and voltage drop in power transformers
• Determination of earth conductor section according to fault current or duration
• Transformer tap changer

Reference documentation

The following aspects were considered during the development of the application:

• Standard IEC / EN

Photovoltaics

• Configurator for photovoltaic systems with monofacial and bifacial modules, with options for free-standing or rooftop installation, and customizable temperature and irradiance parameters.
• Simulation of IV and PV curves of photovoltaic modules
• Comparator of technical specifications for inverters and panels

Additional

• Single-line diagram with intuitive drag & drop
• Sizing of electrical conduits and trays
• Ventilation of the transformer station
• Formulas used in calculations