Home Solid-State Overload Relays

    Solid-State Overload Relays


    The new RW_E Solid State Overload relays are developed with  cutting edge technology according to the most demanding standards worldwide. With its wide current/AMP setting; the RW_E OL Relay can be used for protection of electric motors of different power ratings. The benefit is versatility and flexibility for manufacturers due to the possibility of standardization of control panels. This Solid State Overload Relay can be directly mounted on WEG Contactors (CWM and CWB lines) providing very reliable and flexible motor starter units. The RW_E counts on two independent and highly reliable built in auxiliary contacts that assure the motor is switched off when a failure occurs.

    Standard Features
    • 3-pole solid state overload relays with adjustable
    trip class: 10, 20 and 30
    • Self-powered
    • Wide adjustment range (5:1)
    • Thermal memory
    • Phase loss protection (less than 5 seconds)
    • Phase unbalance protection (>40% between
    • Temperature compensated (-20 °C up to +60 °C)
    • Manual or automatic reset modes
    • Direct mounting on CWB9…38 and CWM9…105
    • Separate mounting is possible with accessories
    1NO + 1NC built in auxiliary contacts

    Solid-State Overload Relay Catalog Number Sequence

    Suitable for Great Variety of Applications
    The solid-state overload relays RW_E are suitable to protect motors in a wide range of industrial applications including those where long starting time is required. This way, motors on low, medium or heavy duty applications can be properly protected just by selecting the proper trip class (10, 20 or 30 according to IEC 60947-4-1) in the DIP-switches.

    Additionally, the microprocessed electronic circuits of RW_E are temperature compensated according to IEC 60947-4-1, which means that throughout the temperature range of -20 °C up to +60 °C, the tripping point is not affected and it performs consistently without undesirable tripping.

    The RW_E also features thermal memory which assures that the heating and cooling effects of motors are modeled and proper protection is guaranteed even after downtime periods.


    Product by: WEG Electric Corp.