The 3WA air circuit breakers serve as incoming feeder, tie, and outgoing feeder circuit breakers in electrical installations across various sectors, including industry, buildings, and infrastructure applications. They provide reliable protection for electrical systems and machines, preventing damage. Thanks to their robust design, outstanding quality, and intelligent protective functions, these circuit breakers help avoid system downtimes, reducing associated costs. Furthermore, with modular communication options, they can seamlessly integrate into electronic control, maintenance, and energy management systems.
ACB (Air Circuit Breakers) 3WA Series
Category :
Components
Brand :
Siemens
Product Information
Specifications
3WA air circuit breakers come in three sizes for AC applications and one size for DC applications, covering a power range from 630 A to 6,300 A. They are available in both 3 and 4 pole versions, with a high breaking capacity (Icu) ranging from 42 kA up to 150 kA at 690 V AC.
Standards
- Simple and interactive selection aids, along with function packages, ensure significantly reduced complexity in planning and selection. Based on the current IEC 60947-1/-2 standards, the 3WA can be used worldwide.
- Type testing according to IEC 61439 is only required if new technical features of the 3WA air circuit breaker are utilized, such as high switching capacities.
- The 3WA air circuit breaker is developed and manufactured in accordance with a certified quality management system that complies with DIN EN ISO 9001:2008.
Feature and Benefits
- Further development of the proven and extremely robust design of the previous model, the 3WL air circuit breaker.
- Introduction of new special versions (with high short-circuit breaking capacity at high voltages): up to 125 kA at 1000 V.
- Maximum load capacity of the circuit breaker is ensured thanks to its long-lasting short-circuit breaking capacity at ICW (3 s).
- Accessories are designed to maximize the service life of the air circuit breaker.
- The electronic trip unit is user-friendly, allowing operation via a rotary coding switch, display, or remote parameterization.
- Easy integration of the 3WA air circuit breaker into a switchboard without the need for additional testing if the 3WL air circuit breaker is already integrated into the switchboard design.
- Replacement in an existing switchboard is simple: the 3WL air circuit breaker can be replaced by the 3WA air circuit breaker without additional testing according to IEC 61439, provided the latter is operated under the same infeed/load conditions.
- Possibility of installing the 3WA air circuit breaker in an existing 3WL guide frame.
Features and Benefits
- Further development of the proven, extremely robust design of the previous model, the 3WL air circuit breaker
- New special versions (high short-circuit breaking capacity at high voltages): up to 125 kA at 1000 V
- Maximum load capacity of circuit breaker thanks to long-lasting short-circuit breaking capacity at ICW (3 s)
- Accessories designed for the maximum service life of the air circuit breaker
- User-friendly operation of electronic trip unit via rotary coding switch, display, or remote parameterization
- Easy integration of the 3WA air circuit breaker in switchboard with no need for additional testing if the 3WL air circuit breaker is already integrated in the switchboard design
- Easy to replace in existing switchboard: the 3WL air circuit breaker can be replaced by the 3WA air circuit breaker without additional testing according to IEC 61439 if the latter is operated under the same infeed/load conditions
- Possibility of installing the 3WA air circuit breaker in an existing 3WL guide frame
Warranty
The panels are guaranteed for 12 months after commissioning or 18 months after delivery, with the option for an extended warranty.
