New series of circuit breakers protects equipment and prevents downtime

WEG has launched the DWB series of modular circuit breakers that can reliably interrupt short-circuit currents up to 80kA at 415V to protect plant, equipment, cables and wiring, as well as motors and generators. The circuit breakers are ideal for a wide range of industrial applications and feature compact design, robustness and reliability, so engineers benefit from maximum operational reliability and uptime under the most demanding conditions as well as space-saving installation. The moulded case circuit breakers are designed with rated operating voltages up to 690VAC or 250VDC and are available in three-pole and four-pole versions in six case sizes with rated operating currents from 16A to 1,600A. The circuit breakers and associated equipment and components can be switched on and off remotely with related accessories. The whole range features the same accessories including auxiliary switch blocks, undervoltage and shunt opening releases, and phase separators so engineers can reduce the required diversity of parts stock. That has a positive impact on stock management, type selection and detail engineering. The modular design of the series allows the complexity of the circuit breakers to be adapted to the requirements of each application. For example, the needs of simple cost-sensitive applications can be met using circuit breakers with fixed overload and short-circuit tripping mechanisms based on the thermal-magnetic operating principle. By contrast, circuit breakers with adjustable overload and short-circuit tripping mechanisms can be deployed in more sophisticated solutions. Circuit breakers with adjustable current-dependent or time-delayed overload and short-circuit tripping using electronic tripping mechanisms are available to meet complex requirements. These versions can be used to construct selective protection networks to ensure that only the circuit breaker directly ahead of the fault location is tripped and all other parts of the network are reliably supplied with power.