Circuit Breaker (Three-Phase)
A three-pole switch controlled by an external signal.
blockType: AcausalElectricPowerSystems.Switches.ThreePhaseCircuitBreaker
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Path in the library: |
Description
Block Circuit Breaker (Three-Phase) simulates a three-phase switch that uses an external signal and phase current values to break an electrical circuit.
The table below shows both the external signal vT and the parameter value Zero crossing determine the status of the block.
| Condition | Block behavior | Resistance parameter used | |
|---|---|---|---|
vT < Threshold |
The switch is closed. Each phase of port ~1 is connected to the corresponding phase of port ~2. |
Closed resistance |
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vT ≥ Threshold |
It opens when the current crosses zero after vT ≥ Threshold |
When the current in any phase of port ~1 crosses zero, the phase is disconnected from the corresponding phase on port ~2. The switch is open. |
Open conductance |
Opens when vT ≥ Threshold |
The switch is open. |
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Ports
Conserving
#
~1
—
three-phase electrical port
electricity
Details
Three-phase electrical port.
| Program usage name |
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#
~2
—
three-phase electrical port
electricity
Details
Three-phase electrical port.
| Program usage name |
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Input
#
vT
—
control port
scalar
Details
The port that controls the status of the switch.
| Data types |
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| Complex numbers support |
No |
Parameters
Main
#
Closed resistance —
resistance of a closed circuit breaker
Ohm | mOhm | kOhm | MOhm | GOhm
Details
The resistance between ports ~1 and ~2 when the switch is closed.
| Units |
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| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
#
Open conductance —
open circuit breaker conductivity
S | nS | uS | mS | 1/Ohm
Details
The conductivity between ports ~1 and ~2 when the switch is open.
| Units |
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| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
#
Threshold —
Threshold voltage
V | uV | mV | kV | MV
Details
The threshold voltage for the control port is vT. The unit uses the threshold voltage and the vT value at the beginning of the simulation to determine whether the switch is initially open or closed. If the check box is selected Zero crossing when the voltage rises above the threshold value, the switch opens each phase when its current crosses zero. If the check box is Zero crossing If removed, the switch opens each phase as soon as the voltage rises above the threshold value. When the voltage on the control port drops below the threshold value, the switch closes.
| Units |
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| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
# Zero crossing — the behavior of the switch when the current crosses zero
Details
If the check box is selected Zero crossing when the voltage rises above the threshold value, the switch opens when the current crosses zero. If the check box is Zero crossing If it is removed, the switch opens as soon as the voltage rises above the threshold value. When the voltage on the control port drops below the threshold value, the switch closes.
| Default value |
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| Program usage name |
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| Evaluatable |
No |