Three phase breaker#

The Three phase breaker block implements a model of a power switch with an internal resistance set in a closed position and which is controlled either by an array of signals supplied to Logical port or by an internal timer. If there is an external control signal, if the value of signals <1 and (the current value went through zero or was open in the previous step), then the keys position of the corresponding phases is opened, and in any other state - is closed. Switching the keys to open position occurs when current value passes through zero and the keys close immediately. In case of internal control, control signals occur as a result of the simulation time reaching a certain time. The switchings are similar to external control.

The block has the ability to set the initial closed or opened keys value, as well as select controlled keys. The model can take into account the damper circuit set by resistance and capacitance.

The block has 3 electrical inputs and outputs. The control input is available depending on the type of circuit breaker control. In case of external control, it is possible to control each phase separately with different signals from each other. In case of internal control, the signal is common to each phase.

1. Properties#

Property	Default value	Description	Units of measurement
Control mode: Internal; External	Internal	-	-
Initial status: Open; Close	Open	-	-
Switching time	1.0;2.0;	Available, when `Control mode` - `Internal`	s
Snubber circuit	On	-	-
Snubber capacitance	1.0e-6	Available, when `Snubber circuit` - `On`	F
Snubber resistance	1000000.0	Available, when `Snubber circuit` - `On`	Ohm
Internal resistance	0.001	-	Ohm
Switching of phase A	On	-	-
Switching of phase B	On	-	-
Switching of phase C	On	-	-

2. Inputs and outputs#

Parameters	Input/Output	Description	Units of measurement	Port type
A	Input	-	-	Electronics
B	Input	-	-	Electronics
C	Input	-	-	Electronics
Control	Input	Available, when `Control mode` - `External`	-	Automation
a	Output	-	-	Electronics
b	Output	-	-	Electronics
c	Output	-	-	Electronics

In order to see the connection capabilities of the block, you need to go to page Description of block ports