International (5) 4-07 The RW Class Thermal Overload Relays, with their extended operational service lives, are designed for use with the CWC miniature and CWM standard contactors. These relays can be mounted directly under WEG contactors, assuring electrical and mechanical operation as an open across-the-line starter, from fractional power to 75 HP at 4V. Available in compact frame sizes. Features Adjustable tripping current Phase-loss sensitivity Tripping class Auxiliary contacts NO + NC Temperature compensation from -4 F to +40 F Hand/Auto/Reset button International (5) 4-07
International (5) 4-07 MatchingContactor CWC07 CWC0 CWCA0 (Mini-contactor) CWC025 (Mini-contactor) CWM9...CWM40 CWM32...CWM40 CWM50...CWM80 Setting Range Max. Fuse Catalog Number Min. Max. 0.28 RW7-D2-D004 0.3 RW7-D2-C03 0.5 RW7-D2-D008 RW7-D2-D02 RW7-D2-D08 RW7-D2-D028 RW7-D2-U004.30 25 RW7-D2-D03 5. 30 RW7-D2-U008 7.00 40 RW7-D2-U0 2.5 50 RW7-D2-D25.0 RW7-D2-U0.0 7.0 RW7-D2-U07.0 23.0 RW7-2D2-U023 22.0 0 RW7-2D2-U032 0.28 RW27-D2-D004 0.3 RW27-D2-C03 0.5 RW27-D2-D008 RW27-D2-D02 RW27-D2-D08 RW27-D2-D028 RW27-D2-U004.30 25 RW27-D2-D03 5. 30 RW27-D2-U008 7.00 40 RW27-D2-U0 2.5 50 RW27-D2-D25.0 RW27-D2-U0.0 7.0 RW27-D2-U07.0 23.0 RW27-D2-U023 22.0 RW27-D2-U032 25.0 RW7-D2-U040 25 RW7-D2-U050 25.0 RW7-2D2-U040 25 RW7-2D2-U050 57.0 0 RW7-2D2-U057 3.0 0 RW7-2D2-U03 57.0 70.0 75 RW7-2D2-U070 3.0 80.0 75 RW7-2D2-U080 International (5) 4-07
International (5) 4-07 General Ratings TYPE RW7D RW27D RW7D RW7D RW37D RW407D Devices according to International Standards IEC 947- / 947-4-, European Standards EN 947- / 947-4-, Underwriters Laboratories - UL 508; CSA C.22.2/4; VDE 0/2 Standards Number of Poles 2 TrippingClass Phase Failure Sensitivity Yes TemperatureCompensation Yes Rated Insulation VoltageUi Acc. IEC 947-4- Acc. UL; CSA 00 0 Rated Operation VoltageUe Acc. IEC 947-4- Acc. UL; CSA 0 [kv] Rated Impulse VoltageUimp 00 Current Direct Alternating [Hz] Degree of Protection YES NO up to 400 50/ Protection against direct contact acc. VDE 0 - Part 0 - IP20 Ambient Temperature Storage -50 to +80ºC (-58 to 7ºF) Operating -20 to +70ºC (-4 to 8ºF) Ambient temperature compensation -20 to +ºC (-4 to 40ºF) PollutionDegree 3 Mounting Direct on contactor or separately with accessory Separate Current Heat Loss Lower value of setting range (W) 0.9 0.9.5 2.3 Higher value of setting range (W).4.7 4.7 4.7.9.9 [kg] 0. 0. 0.3 0.52 2.30 3.2 [lb] 0.33 0.32 0.8. 5.0.88 Allen Head Slide Bar Slide Bar.0-35 25-35 4.0 -.0 35.4-53. 2x(25x5) 4-2 23.9-230. 2x(x) 23-2 203. - 230. 200 Weight Shock Resistance IEC 08 part 2-27 [g/ms] 8/ 8/ Main TerminalsCapacity Fine - Stranded with Sleeve Coarse - Stranded / Solid Slide Bars Stranded / Solid (UL / CSA) Tightening Torque Short Circuit Rating 0V Cross / Slotted Combination [AWG] [N.m] [lb-in].5 -.5 -.0 4 -.4-2.3 2.4-20.4.5 -.5 -.0 4 -.4-2.3 2.4-20.4 [ka] 5 5.0-35.0-35 8-2 4.0 -.0 35.4-53. 5 (40-57A) (50-3A) International (5) 4-07
International (5) 4-07 Thermal Overload Relays - WEG RW Series, 4 Pole Auxiliary Contacts General Ratings TYPE RW7D Front AuxiliaryContact RW27D RW7D RW7D RW37D RW407D NO + NC Rated Auxiliary Contacts AC-4/ DC-3/4 24V V 4.0 3.5 25V 3.0 230V 2.0 400V.5 500V 0.5 V 0.3 24V.0 V 0.5 V 0.25 220V 0. UL/CSA C0 ; R300 Rated ThermalCurrent Fine - Stranded with Sleeve.0-2.5 Coarse - Stranded / Solid.0-2.5 Stranded / Solid (UL / CSA) [AWG] - 2 [N.m].0 -.5 [lb-in] 8.9-3.3 Short Circuit Protection Fuses Type D or NH gl/gg Auxiliar Terminals Capacity Tightening Torque International (5) 4-07
International (5) 4-07 Thermal Overload Relays - WEG RW Series, 4 Pole RW Tripping Characteristics These tripping characteristics show the tripping of RW in relation to the current. They show the mean values of the tolerance ranges at on ambient temperature of 8ºF (20ºC), starting from cold stats. The tripping time of the overloa d releases at operational temperature is reduced to approximately 25% of the values shown. Under normal operational conditions, all three phases of the RWs should be loaded. Altitude & Temperature Derating The derating of a RW overload relay has two possible factors: ) Ambient temperature Temperature compensation considers a factor according to which the rated current must be reduced when ambient temperature is higher than ºC (40ºF). 2) Altitude Altitude compensation involves both, rated current and voltage. Current compensation considers a factor according to the rated current must be reduced. For voltage, altitude limits the higher operating voltage the overload relay can be used. Temperature Compensation 49ºF 8ºF 7ºF 7ºF Current Correction (5ºC) (70ºC) (75ºC) (80ºC) Altitude Voltage Correction [Ue] x Setting current The derating of the permissible operating current for installation altitudes above 2,000m (,7 ft) and ambient temperatures over ºC (40ºF) is calculated according to: Total derating = Derating x Deratingambient temperature altitude Example; Altitude: 3,000 m (,000 ft) Ambient temperature: 70ºC (8ºF) Meters K = 0.9 K2 = 0.87 Total current derating = 0.9 x 0.87 = 0.84 x Ie In this case, the maximum rated voltage we can connect to our RW overload relay is 550V. Derating Factor In order to select the proper overload relay, you have to choose a device with - a cur rent range that accommodates: Overload Setting Point = FLA / (K x K2) motor As in the example above, K x K2 = 0.84 For a motor with FLA = 20Amps Overload Setting Point = 20 / 0.84 = 23.8Amps International (5) 4-07