3WA
The 3WA circuit breaker is the new generation of air circuit breakers in the Siemens AG portfolio. It is based on the proven and robust design of its predecessor 3WL. 3WA supports Modbus TCP module COM190 for connecting to higher-level management systems. The technical data of the 3WA circuit breaker mechanics and the portfolio have been extended as compared with 3WL, and the electronic components have been completely redeveloped.
The 3WA circuit breaker is part of the product family of SENTRON protection, switching, measuring and monitoring devices and covers applications in the rated current range from 630 A to 6300 A.
- AC devices are available as circuit breakers and non-automatic circuit breakers.
- DC devices are only available as non-automatic circuit breakers.
The 3WA circuit breaker has the following characteristics:
- Three sizes:
- Size 1 with a rated current In from 630 A to 2500 A
- Size 2 with a rated current In from 2000 A to 4000 A
- Size 3 with a rated current In from 4000 A to 6300 A
Metering Functions and Levels - Overview
Measurement points | Current Measurement | PMF-I | PMF-II | PMF-III |
Active power P |
|
| Yes | Yes |
Reactive Power Q |
|
| Yes | Yes |
Apparent Power S |
|
| Yes | Yes |
Active Energy Ea |
| Yes | Yes | Yes |
Reactive Energy Er |
|
| Yes | Yes |
Apparent Energy Eap |
|
| Yes | Yes |
Frequency f |
|
| Yes | Yes |
Phase Current I | Yes | Yes | Yes | Yes |
Neutral Conductor current In | Yes | Yes | Yes | Yes |
Voltages ULL and ULN |
| Yes | Yes | Yes |
Power Factor PF |
|
| Yes | Yes |
Total Harmonic Distortion of Voltage and Current THDu and THDi |
|
|
| Yes |
If some measurement points are not supported due to availability of license then the corresponding values of the measurements points would be shown as “-“ in all tiles.
State symbols of the molded-case circuit breaker
Different states of the molded-case circuit breaker are represented as a circuit breaker symbol. The state symbol of the molded-case circuit breaker indicates the position of the molded-case circuit breaker in the frame. You can see whether the molded-case circuit breaker is open or closed. The background color designates the status of the relevant message.
Color | Message status | Meaning |
Green | Green | No messages pending |
Yellow | Yellow | At least one warning message or one threshold warning is pending |
Red | Red | At least one trip message is currently pending |
White | White | No information available about the existence of messages |
State Symbol with Guide Frame | Description of the State |
| The circuit breaker is not available. |
| The circuit breaker is in the connected position and open. At the moment, neither trip messages nor warning messages or threshold messages are pending. |
| The circuit breaker is in the connected position and open. A trip message is pending. |
| The circuit breaker is in the connected position and open. At least one warning message or one threshold warning is pending. |
| The circuit breaker is in test position and opened. At the moment, neither tripping nor warning or setpoint messages are present. |
| The circuit breaker is in test position and opened. At the moment, a tripping message is present. |
| The circuit breaker is in test position and opened. At the moment, at least one warning or setpoint message is present. |
| The circuit breaker is in disconnected position. |
| The circuit breaker is in connected position and closed. At the moment, there are neither tripping nor warning or setpoint messages present. |
| The circuit breaker is in connected position and closed. At the moment, a tripping message is present. |
| The circuit breaker is in connected position and closed. At the moment, at least one warning or setpoint message is present. |
| The circuit breaker is in the test position and closed. At the moment, neither trip messages nor warning messages or threshold messages are pending. |
| The circuit breaker is in the test position and closed. A trip message is pending. |
| The circuit breaker is in the test position and closed. At least one warning message or one threshold warning is pending. |
| The circuit breaker is in connected position. It is unknown whether the switch is closed or opened. At the moment, neither tripping nor warning or setpoint messages are present. |
| The circuit breaker is in connected position. It is unknown whether the switch is closed or opened. At the moment, a tripping message is present. |
| The circuit breaker is in the connected position. It is not known whether the molded-case circuit breaker is open or closed. At least one warning message or one threshold warning is pending. |
| The circuit breaker is in test position. It is unknown whether the switch is closed or opened. At the moment, neither tripping nor warning or setpoint messages are present. |
| The circuit breaker is in test position. It is unknown whether the switch is closed or opened. At the moment, a tripping message is present. |
| The circuit breaker is in test position. It is unknown whether the switch is closed or opened. At the moment, at least one warning or setpoint message is present. |
| The circuit breaker is in connected position and has tripped. Tripping, warning, or setpoint messages are not present at the moment. |
| The circuit breaker is in connected position and has tripped. Tripping message is present at the moment. |
| The circuit breaker is in connected position and has tripped. At the moment, at least one warning or setpoint message is present. |
| The circuit breaker is in test position and has tripped. A tripping, message is present at the moment. |
| The circuit breaker is in test position and has tripped. At least one warning or setpoint message is present at the moment. |
| The circuit breaker is in test position and has tripped. Tripping, warning, or setpoint messages are not present at the moment. |
offline | The circuit breaker is offline. |
