RW_E relays offer a wider adjustment range to accommodate a broader spectrum of motor power ratings and reduce energy dissipation by 87% compared to conventional thermal devices. This results in improved energy efficiency, ensures reliable motor operation, and reduces maintenance costs and the total cost of ownership (TCO) for the user.
The RW_E relay's wide current adjustment range, with a 1:5 ratio between minimum and maximum values, allows the relays to cover a broad range of motor power ratings at nominal operating voltages up to 690 VAC. This enables original equipment manufacturers (OEMs) to reduce their parts inventory and associated storage costs. Furthermore, it saves time when designing machines to accommodate different relay models.
The new WEG relays have power ratings from 0.4 A to 840 A and protect electric motors during normal start-ups or under heavy load conditions against overheating caused by excessive loads and phase loss or imbalance. Powered by the motor's own current, without the need for an additional external power supply, the RW_E relays include a special thermal memory that establishes a precise thermal balance of the motor to ensure optimal protection.
Furthermore, the low power dissipation contributes significantly to reducing the thermal load in distribution cabinets and allows the corresponding equipment in electrical switchgear to be replaced in accordance with IEC 61439 without requiring a new certification.
These relays are as easy to use as bimetallic motor protection relays and feature manual or automatic reset after disconnection. Trip classes 10, 20, and 30 can be easily configured on the front panel for normal starts or heavy load conditions. Therefore, RW_E motor protection relays are suitable for a wide range of industrial applications and allow users to respond flexibly to changes in existing systems. The relays also include temperature compensation, ensuring high tripping accuracy between -20°C and 60°C without restriction.
These relays are distinguished by their world-class reliability and are manufactured and tested in accordance with the international standard IEC/EN 60947 (DIN VDE 0660) and UL 60947-4-1A (UL508) certification for the North American market. RW_E electronic motor protection relays can be directly combined with WEG CWM and CWB contactors to create reliable and compact motor starting systems.
