Main Content

SPST Switch (Three-Phase)

Three-phase single-pole single-throw switch

  • SPST Switch (Three-Phase) block

Libraries:
Simscape / Electrical / Switches & Breakers

Description

The SPST Switch (Three-Phase) block models a three-phase single-throw switch that uses an external signal to connect each phase of port ~1 with the corresponding phase of port ~2 via internal resistance.

The table shows how the external signal vT controls the block behavior.

ConditionBlock BehaviorResistance Parameter Used
vTThresholdThe switch is open. Each phase in the composite three-phase port ~1 connects to the corresponding phase in the port ~2 via large internal resistance.Open conductance
vT >ThresholdThe switch is closed. Each phase in the composite three-phase port ~1 connects to the corresponding phase in the port ~2 via small internal resistance.Closed resistance

Ports

Input

expand all

Physical control port.

Dependencies

To enable this port, set Modeling option to Expanded three-phase ports | PS control port or Composite three-phase ports | PS control port.

Conserving

expand all

Expandable three-phase electrical conserving port.

Expandable three-phase electrical conserving port.

Electrical conserving control port.

Dependencies

To enable this port, set Modeling option to Expanded three-phase ports| Electrical control port or Composite three-phase ports| Electrical control port.

Parameters

expand all

Whether to model composite or expanded three-phase ports and physical signal or electrical control ports.

Resistance between ports ~1 and ~2 when the switch is closed.

Conductance between ports ~1 and ~2 when the switch is open.

Threshold voltage for the control port vT. When the voltage is above the threshold, the switch is closed.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2013b