Electrex is the most advanced electrical generation and distribution model on the training market today. User-friendly displays give both the trainee and the expert access to dynamic electrical conditions.The displays have the familiar look of a one-line diagram. System level information is accessed from the first display page; additional pages are accessed using tabs at the bottom.

Dynamic modeling of distribution includes:
  • Remote substation buses which terminate the transmission lines from the unit. These buses are each connected through individually adjusted atmittances to the "infinite grid" with instructor control of system voltabge and frequency.
  • Individual transmission lines using line atmittance and charging data provided by the utility
    • Current, power, and var are computed individually for each transmission line under all operating conditions
  • High voltage switchyard with individual nodes between each pair of circuit breakers together with nodes for each switchyard high voltage bus.
    • This approach enables computation of switchyard voltages, current, power, and var under all possible breaker lineups.
  • Medium voltage buses together with all associated bus cross-connections for accurate computation of emergency generator load currents under all operating conditions.


Dynamic modeling of generation includes:
  • Synchronous machine (generator) models intrinsically handle conditions such as faults, gross under-excitation, improper synchronization and accidental energization. Field-proven voltage behind transient reactance model provides accurate simulation of machine voltage response to sudden load application.
  • Voltage regulator and excitation system of a synchronous machine are custom modeled using design/performance data.
    • Accurate speed response is calculated during startup, sudden load application and potential overload.


Large induction motor model is field-proven; it computes motor speed and equivalent circuit parameters under all operating conditions including operation of the motor as an induction generator and operation under conditions of degraded voltage and/or frequency.

Double-precision complex matrix solution technique is highly efficient and results in accurate solution of complex nodal voltages together with AC currents, power and var.

Graphical display of entire ED model (including transmission lines and off-site substations). Voltage, current, power and var can be displayed for all inter-bus ties, generators and larger motor loads.

Integrated easily into existing simulation systems or can be designed as stand-alone.