WEG has launched a new family of modular contactors, the CWB which offer machine builders a high level of reliability and security. WEG is also enhancing its offering with user-friendly cage clamp technology. Both, the motor protective circuit breakers MPW16 and the compact contactors CWC0 are now available with screw-less terminal technology, enabling panel builders to save time and money. The range of CWB contactors are reliable, flexible and compact. For safety-related control functions, its contacts are designed and tested as positively driven contacts according to IEC/EN 60947-5-1, Annex L and as mirror contacts according to IEC/EN 60947-4-1, Annex F. Where a mirror contact is an auxiliary contact (NC, normally closed), it cannot be closed simultaneously with a main contact (NO, normally open) and as a result, special safety relays are no longer required. The contactors are suitable for global use meeting IEC/EN 60947 standards, and are UL certified for the North American market.
The CWB contactors can easily be set up in combination with the MPW motor protective circuit breakers to operate as direct, reversing or star-delta starters. This fuse-less solution is ideally suited to meet the demands for switching and protecting electric motors in the global market place and users can flexibly and cost-effectively tailor individual components or pre-assembled configurations to their application. The low power consumption of the contactor coils (6 W, DC power supply) allows for direct and safe control via digital outputs of PLC, frequency inverter or soft starter.
The contactors are compact with a width of 45mm. As such, panel builders can optimise space in the cabinet and simplify their planning process, and installing the switchgear is easy. This frame size applies to AC and DC power supplies (up to 18.5 kW/400 V). The mechanical interlock for reversing and star-delta starters is designed so that the user does not require additional space or any tools to operate it. Surge suppressors can easily be integrated without increasing the depth of the devices. Two built-in auxiliary contacts (1xNO and 1xNC) are sufficient for a variety of applications. However, additional auxiliary contact blocks can be mounted at the front or side as required. The comprehensive modular switchgear portfolio comprises a matching range of accessories including easy connection kits and link adapters that help users save time and money.