Circuit Breaker
A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to interrupt the current flow when a fault is detected.
The different types of circuit breakers that are supported in Power Operation are:
| Type | Description |
|---|---|
| ANSI | ANSI High Voltage Rackable Circuit Breaker with Control |
| ANSI High Voltage Rackable Circuit Breaker | |
| ANSI Low Voltage Nonrackable Breaker Horizontal | |
| ANSI Low Voltage Rackable Breaker Vertical | |
| ANSI Low Voltage Nonrackable Breaker Vertical | |
| ANSI Low Voltage Rackable Breaker Horizontal | |
| ANSI Medium Voltage Nonrackable Breaker Horizontal | |
| ANSI Medium Voltage Nonrackable Breaker Vertical | |
| ANSI Medium Voltage Rackable Breaker Horizontal | |
| ANSI Medium Voltage Rackable Breaker Vertical | |
| IEC | IEC High Voltage Feeder with Earth Hr |
| IEC High Voltage Feeder with Earth with Control | |
| IEC High Voltage Feeder with Earth | |
| IEC High Voltage Incomer with Earth | |
| IEC High Voltage Nonrackable | |
| IEC High Voltage Rackable |
Supported item names and tags by breaker component
| ItemName | Variable tag | Supported field values | Description |
|---|---|---|---|
| BkrPos
BkrPos_On BkrPos_Off |
\XCBR1\Pos
\XCBR1\Pos_On \XCBR1\Pos_Off |
0, 1, 2 & 3
0 & 1 0 & 1 |
Position of circuit breaker (Intermediate, Open, Closed, Error) |
| BkrRkdPos | \XCBR1\CBRkdPos | 0, 1 & 2 | Breaker Rack-in/Trunk status (Racked-In, Racked-Out, Test) |
| BkrESwPos | \XCBR1\ESwPos | 0 & 1 | Earth Switch Status (Open, Closed) |
| BkrTr | \PTRC1\Tr | 0 & 1 | Breaker Trip Status (Normal, Tripped) |
If Double Point Status (DPS) is read from the field device through * \XCBR1\Pos or *\XCBR1\Pos_On and \XCBR1\Pos_Off tags, then the following table accurately represents all four states:
| Breaker position | XCBR1/Pos | XCBR1/Pos_On | XCBR1/Pos_Off |
|---|---|---|---|
| Intermediate | 0 | 0 | 0 |
| Open | 1 | 0 | 1 |
| Closed | 2 | 1 | 0 |
| Indeterminate/Error | 3 | 1 | 1 |
The graphic representation of the states of breaker components, as seen in the WebHMI (with advanced one-line animation), is displayed in the following table:
| States of a breaker | Graphic |
|---|---|
| Intermediate |
|
| Open |
|
| Closed |
|
| Indeterminate/Error |
|
| Breaker in a tripped state |
|
| Racked-in |
|
| Racked-out |
|