Power Systems
Per-unit base, feeder voltage drop, transformer sizing, LV cable sizing and transformer-bus fault level β ported from PowerSys Pro + psextract.
βSystem Base
Per-unit reference shared by fault calculations below.
γFeeder Voltage Drop
3-phase feeder drop from R/X per km, length, load and PF.
β£Transformer Sizing + Fault Level
Recommended standard size, utilisation and symmetrical/asymmetrical fault current.
πLV Cable Sizing IEC 60364
Copper XLPE, derated for installation + ambient, with VD check.
β Short-Circuit at Bus
Fault current at transformer LV bus including feeder impedance.
πDesign Standards
Switches formulas, limits and references across the calculators.
πLive Load Study 0β150%
Drag the slider β feeder VD, transformer loading and cable VD recalculate live from your inputs above. Same slider drives SLD loading colours.
Network Analysis Report
psextract-style system report. Edit bus voltages live β compliance re-evaluates instantly. Sample 5-bus demo case preloaded.
Bus Results β click Vm / load cells to edit
| Bus | Name | V (kV) | Vm (p.u.) | Va (Β°) | P (kW) | Q (kVar) | Status |
|---|
Branch Power Flows
| From | To | Pf (kW) | Qf (kVar) | Loading % | Status |
|---|
Short-Circuit Analysis (Z-bus method, sample)
| Bus | I_sc (kA) | S_sc (MVA) | Z_sc (Ξ©) | Breaker β₯ |
|---|
NERC Compliance
| Check | Result | Status |
|---|
Generator Dispatch
| Unit | P (kW) | Q (kVar) | Vset (p.u.) | Profile |
|---|
Single-Line Diagram Builder
Place mode: pick a component, then click the canvas. Wire mode: click two symbols to connect them. Operate mode: click a breaker to open/close, click a load or motor to cycle its loading. Drag to move, double-click to delete. Loading colours follow the Live Load Study slider.
Components
Mode
Actions
Engineering Report
Collects your latest results from every module above into one professional report. Print or save as PDF.