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Automation Solid-State Overload Relays RW_E

Automation Solid-State Overload Relays RW_E
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Automation Solid-State Overload Relays RW_E - 1

Motors | Automation | Energy | Transmission & Distribution | Coatings Automation Solid-State Overload Relays RW_E

Automation Solid-State Overload Relays RW_E - 2

Solid-State Overload Relays - RW_E Versatility and Accuracy for Electric Motor Protection The continuous pursuit for improvement and cost reduction in production in industry have taken the electric motor control and protection systems to a level where low losses, precision and versatility are imperative. In order to better meet industry needs, WEG launches the RW_E solid-state overload relays for motor protection. The RW_E is meant to assure increased reliability for protection of low voltage three-phase electric motors in sinusoidal 50/60 Hz networks where reliability, low power...

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Automation Solid-State Overload Relays RW_E - 3

Solid-State Overload Relays - RW_E Solid-State x Thermal (Bimetallic) Overload Relays Thermal overload relays are designed to mimic the heat actually generated in the motor. They simulate the motor heating by passing motor current directly or indirectly through bimetal strips. As the motor temperature increases, so does the temperature of the overload relay thermal unit. The heat bends the bimetal strips and, depending on the current setting of the relay, a trip mechanism is activated. Continuous duty and low number of motor start-ups are common in most usual applications. In such...

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Automation Solid-State Overload Relays RW_E - 4

Solid-State Overload Relays - RW_E Flexibility and Versatility In an increasingly globalized and competitive market it is common that machine manufacturers provide their customers with a wide choice of electric motors with a huge number of different models and output powers. With its wide range current setting (5:1 ratio between maximum and minimum setting), the same RW_E relay can be used for protection of electric motors of different power ratings or for protection of the same motor when applied on networks of different voltages and frequencies. The benefit is versatility and flexibility...

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Automation Solid-State Overload Relays RW_E - 5

Solid-State Overload Relays - RW_E Bimetallic overload relays Due to their design and technology, the electronic circuits of RW_E relays lead to very low power dissipation (less than 0.38 W up to 25 A) and consequently may contribute to the reduction of need for ventilation of control cabinets. <87% Solid-state overload relays Note: 1) Average values of power dissipation per pole for RW_E of current ranges up to 25 A. Basic Features The RW_E counts on two independent and highly reliable built-in auxiliary contacts (12 V, 10 mA) that, when properly wired in series with the coil of the...

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Automation Solid-State Overload Relays RW_E - 6

Solid-State Overload Relays - RW_E 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...

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Automation Solid-State Overload Relays RW_E - 7

Solid-State Overload Relays RW_40...840E - Overview - RWM40E solid-state overload relay (direct mounting on CWM9...40 contactors) - RWM112E solid-state overload relay (direct mounting on CWM50...105 contactors) - RWM420E solid-state overload relay (for use with CWM112...500 contactors) - RWM840E solid-state overload relay (for use with CWM400...800 contactors) - BF27 mounting kit for direct panel mounting by screws or 35 mm DIN rail (for RWM40E) - BF112 mounting kit for direct panel mounting by screws or 35 mm DIN rail (for RWM112E) - GA Connector Links for direct mounting of overload relay...

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Automation Solid-State Overload Relays RW_E - 8

RW_E Solid-State Overload Relays from 0.4 up to 840 A JJ 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) For direct mounting on contactors Phase unbalance protection (>40% between phases) Temperature compensated (-20 °C up to +60 °C) Manual or automatic reset modes Direct mounting on CWB9...38 and CWM9...105 contactors Separate mounting is possible with accessories 1NO + 1NC built in auxiliary contacts Reference code For separate mounting or by connector links1)...

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Automation Solid-State Overload Relays RW_E - 9

Accessories Mounting Kit Illustrative picture Reference code Reference code Enables the overload relay to be mounted directly to a panel via screws or 35 mm DIN rail RWM112E Connector Links for Direct Mounting of Overload Relay on Contactor Illustrative picture Reference code Contains 1 set of plastic insulators (top / bottom) and fixing screws to be used where the overload relay power terminals external dimension exceed the busbar external dimension Reference code Blue Flush pushbutton - Engraved Reset - with shaft. Length: max. 250 mm and min. 22.5 mm Blue extended pushbutton - Engraved...

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Automation Solid-State Overload Relays RW_E - 10

Technical Data General Data Product model Standards Rated insulation voltage Ui (pollution degree 3) Rated impulse withstand voltage Uimp (IEC 60947-1) Rated operational frequency (sinusoidal networks) Three phase loads Suitable for use Single phase / two phase loads Trip class (IEC 60947-4-1) Additional featured protections 10, 20 or 30 - selectable Phase loss Phase unbalance Manual / minimum downtime for reset Automatic / minimum downtime for reset Maximum operation per hour Protection degree (IEC 60529) Main contacts Auxiliary contacts Mechanical shock resistance - 1/2 sinusoid...

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Automation Solid-State Overload Relays RW_E - 11

Technical Data Auxiliary Contacts Product model Rated insulation voltage Ui (pollution degree 3) Rated impulse withstand voltage Uimp (IEC 60947-1) Rated operational voltage Ue Rated thermal current Ith (θ ≤ 60 ºC) Rated operational current Ie AC-14/AC-15 (IEC 60947-5-1) 250 V NEMA control circuit ratings Short-circuit protection with fuse Minimum voltage / admissible current (IEC 60947-5-4) Terminal Capacity and Tightening Torque - Main Contacts Product model Cable size Flexible cable Cable with terminal / rigid cable Flexible cable Cable with terminal / rigid cable AWG wire Tightening...

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