Documentation

Switch

Three-phase single-throw switch

Library

Switches & Breakers

Description

The Switch 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
vT ThresholdThe 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

Parameters

Closed resistance

Resistance between ports ~1 and ~2 when the switch is closed. The default value is 0.001 Ohm.

Open conductance

Conductance between ports ~1 and ~2 when the switch is open. The default value is 1e-6 1/Ohm.

Threshold

Threshold voltage for the control port vT. When the voltage is above the threshold, the switch is closed. The default value is 0 V.

Ports

The block has the following ports:

~1

Expandable three-phase port

~2

Expandable three-phase port

vT

Scalar control port, which is either a physical signal or an electrical port.

Introduced in R2013b

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