Non-ideal

Description of non-ideal contactors in Schematic Editor

The Non-Ideal sub-folder of the Contactors library category contains single and three phase contactors modeled as non-ideal switches, shown in Table 1. Switches are modeled as a small inductance while conducting and small capacitance when open.

Table 1. Non-ideal contactors in the Schematic Editor core library
component component dialog window component parameters

Single phase non-ideal contactor

  • Control source (Digital input or Model)
  • Sa: digital input address
  • Switching: switch opening condition (any current or zero current)
  • Execution rate: (execution rate in case model control is used)

Three phase non-ideal contactor

  • Control source (Digital input or Model)
  • Sa: digital input address
  • Switching: switch opening condition (any current or zero current)
  • Execution rate: (execution rate in case model control is used)

The parameter Resistance and the simulation step are defining the actual inductance and capacitance values according to the following equations:

L = T s R

C =   T s R

Where L and C are the calculated inductance and capacitance, Ts is the simulation step of electrical part of the model, R is the set resistance value.

Digital Alias

If the contactor is controlled by digital input, the alias for digital input used by contactor will be created. The digital input alias will be available under the Digital inputs list alongside the existing Digital input signals. The alias will be shown as Contactor_name.Switch_name, where Contactor_name is the name of the contactor component and Switch_name is the name of the controllable switch in the contactor.