Two-Way Switch

Three-phase double-throw switch

Library

Switches & Breakers

Description

The Two-Way Switch block models a three-phase double-throw switch that uses an external signal to connect each phase of the port ~1 with the corresponding phase of either port ~2 or ~3.

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

ConditionBlock BehaviorResistance Parameter Used
vT ThresholdEach phase of port ~1 is connected to the corresponding phase of port ~2 via internal resistance. Port ~3 is unconnected.Open conductance (port ~1 to port ~3).Closed resistance (port ~1 to port ~2)
vT > ThresholdEach phase of port ~1 is connected to the corresponding phase of port ~3 via internal resistance. Port ~2 is unconnected.Open conductance (port ~1 to port ~2).Closed resistance (port ~1 to port ~3)

Dialog Box and Parameters

Closed resistance

Resistance between ports ~1 and ~3 when the switch is closed. The default value is 0.001 Ω.

Open conductance

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

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

~3

Expandable three-phase port

vT

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

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