3WL11 ACBs Optimized for use in Power Distribution Boards and Wind Turbines
As part of the Sentron product portfolio, the 3WL11 can be flexibly used as an incoming feeder circuit breaker, distribution circuit breaker, tie circuit breaker and outgoing feeder circuit breaker in practically all applications.
The short-circuit breaking capacity of the 3WL circuit breaker size I has been increased to 85 kA at 500 V. Motors, capacitors, generators and transformers can be safely switched and reliably protected against overloads and short circuits. The 3WL11 is now also ideally suited for use in wind turbines and IT networks: for example it meets the technical requirements for wind turbines with 690 V (+20 percent) and the specifications laid down in IEC 60947-2 for use in so-called IT networks with 690 V. IT networks which have no direct connection between the live conductors and ground are characterized by a higher fault tolerance. They are found for example in hospital operating rooms, on railways and in crane systems.
The 3WL11 circuit breaker is available in 3-pole and 4-pole versions and is quick and easy to install in power distribution boards – either in a fixed arrangement or with withdrawable technology. In fixed arrangements the 3WL11 can be connected vertically, horizontally and from the front. Flange connection is an alternative for the withdrawable version. Like all 3WL circuit breakers, the 3WL11 size I ensures total discrimination in spite of the smaller switch dimensions and offers a high current carrying capacity even at high ambient temperatures.
The 3WL11 also features full communication capability via Profibus DP or Modbus RTU. In combination with an electronic control system it enables the monitoring of network processes, thus contributing to professional power management.
Thanks to a maximum switching cycle count of around 15,000 and its compatibility with all available 3WL accessories, the circuit breaker offers a long service life. It is certified in accordance with international standards and can therefore be used world-wide
electrical industry circuit protection news,www.circuit-protection.co.uk