Group: WEG
Catalog excerpts
Motors | Automation | Energy | Transmission & Distribution | Coatings DWA and DWB Molded Case Circuit-Breakers IEC Style
Open the catalog to page 1www.weg.net Industrial systems enhancing productivity Transforming energy into solutions. Molded Case Circuit-Breakers 2
Open the catalog to page 2www.weg.net Molded Case Circuit-Breakers The DWB and DWA circuit-breakers were developed to protect electrical circuits, generators and motors in a wide range of rated currents from 16 to 1600 A. Both ranges comply with IEC60947-2 standard. The Right Circuit-Breaker for your Application For power distribution and electric circuits the circuit-breakers DWB_D up to 250 A and DWA up to 1600 A ensure overload and short-circuit protections through thermal and magnetic releases, respectively. DWB_M and DWM circuit-breakers are designed to protect motor branch circuit against short-circuits,...
Open the catalog to page 4www.weg.net Molded Case Circuit-Breakers Flexibility The WEG DWB range offers full flexibility for customers when fitting the internal accessories, because they are common for frames 160 and 250. Easiness for Replacement Through the transparent front cover of DWB circuit-breakers, it can be easily identified which accessories are installed. Double Insulation Oriented to provide safe solutions to electricians, WEG circuit-breakers have double insulation between live parts and the front of the equipment, except terminals. Besides that, internal accessories were designed to be completely...
Open the catalog to page 5www.weg.net Overview and Technical Data Common characteristics Designed according to IEC60947-2 Rated voltages V AC (50/60 Hz) V DC kV Rated operational voltage - Ue Rated impulse withstand voltage - Uimp Selectivity category Pollution degree Maximum relative humidity 690 250 1) 8 A 3 95% DWB160 DWA160 160 160 Reference Electrical characteristics according to IEC60947-2 ABNT NBR IEC60947-2 Rated current - In (45 °C) A Number of poles 2,3 Insulation voltage - Ui Short-circuit breaking capacity levels B 4 800 V 690 N L B N kA rms 220-240 V 25 50 120 25 50 380-415 V 16 30 2) 80 16 35 Rated...
Open the catalog to page 6Trip Units Fixed Thermal and Fixed Magnetic Adjustable Thermal and Fixed Magnetic Adjustable Thermal and Adjustable Magnetic 1) Thermal protection of DWA800 and DWG800 frames is adjustable from 0,7 to 1 x In. 2) Magnetic protection of DWA800 800 A is adjustable from 4to8x In. 8 | Molded Case Circuit-Breakers
Open the catalog to page 8Trip Units Fixed Magnetic Adjustable Magnetic Molded Case Circuit-Breakers | 9
Open the catalog to page 93 - Auxiliary contact block BC, alarm block AL, alarm/contact 11 4 - Under voltage release BS, shunt release BD 13 6 - Phase barriers of DWB160 (supplied as standard) 7 - 90° connection extension bars CT for DWB160 8 - Straight extension bars BEDWB160 or BEDWB250 (terminal tags) Phase barriers of DWB250 (supplied as standard) - Panel door rotary operating handle MRXfor DWB160 - Panel door rotary operating handle MR DWA160 10 | Molded Case Circuit-Breakers
Open the catalog to page 10www.weg.net Accessories Overview of DWA400, 800 and 1600 13 12 2 11 10 1 15 14 3 5 16 4 17 6 7 18 19 20 8 9 1 - MCCB DWA400 2 - Round cable terminals PC DWA400 (lugs) 3 - Straight extension bars BE DWA400 (terminal tags) 4 - Padlocking device PLW400 5 - Motor operator AM DWA400 6 - Mechanical interlock BLIM DWA400 7 - irect rotary handle MRI DWA400 D 8 - Escutcheon MP DWA400 9 - Panel door rotary operating handle MR DWA400 10 - MCCB DWA800 11 - MCCB DWA800 12 - Round cable terminals PC DWA400 (lugs) 13 - Round cable terminals PC DWA800 (lugs) 14 - Straight extension bars BE DWA800 (terminal...
Open the catalog to page 11www.weg.net Internal Accessories Auxiliary Contact and Alarm Contact Blocks The auxiliary contact and alarm blocks have the function to signal remotely the status of circuit-breaker’s power contacts. There are 3 types of contact blocks available: BC Auxiliary Contact g Indicates the main contacts status open/closed (ON/OFF) through a changeover contact (1 SPDT). AL Alarm Contact Block Indicates circuit-breaker’s trip due to overload or short circuit condition through a changeover contact (1SPDT). g BCAL Ensemble comprised of a contact auxiliary contact block + alarm contact block. The BCAL...
Open the catalog to page 12www.weg.net Internal Accessories Shunt and Under Voltage Releases Voltage releases function to trip remotely the circuit-breaker. They are often used for remote emergency stop purpose. BD Shunt Release g hen energized by a pulse or maintained signal of voltage, W the shunt release trips the circuit-breaker (trip position). The shunt release works from 70 to 110% of the rated voltage (0,70 x Un < Ue < 1,10 x Un) g his release features a device to keep it not energized after T the tripping pulse BS Under Voltage Release rips the circuit-breaker when the voltage drops below 35% T of the rated...
Open the catalog to page 13www.weg.net Internal Accessories Possible Configurations of Internal Accessories Reference DWB160 DWA160 4P DWB250 Internal accessory DWA400 DWA800 DWA1600 Number of units Auxiliary contact block BC 2 1 2 1 2 1 2 1 2 1 2 1 3 3 3 3 3 3 Alarm contact block AL 0 1 0 1 0 1 0 1 0 1 0 1 1 1 1 1 1 1 Shunt release BD 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 Under voltage release BS 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 External Accessories Panel Door Rotary Operating Handles The MR rotary handles allow external operation of a circuit-breaker installed in a electrical panel. WEG has 2 options to better fit...
Open the catalog to page 14www.weg.net External Accessories Direct Rotary Operating Handles The MRI direct rotary handles allow direct and rotary operation of circuit-breakers. MRI g egree of protection IP40 D g adlocking in OFF position using 1 to 3 padlocks P Reference DWB250 Direct rotary operating handle Thermometry feature Degree of protection MRI No IP20 black/gray DWA400 DWA800 MRI DWA400 MRI DWA800 MRI DWA1600 Handle color/ Background color Notes: 1) DWA accessories only sold factory-fitted. 2) 2-pole DWBs use the same accessories of 3-pole DWBs. 3) 2 and 4-pole DWAs use the same accessories of 3-pole DWAs....
Open the catalog to page 15www.weg.net External Accessories Changeover Devices Manual-operated or automatic changeovers are used to make safe switching of two different circuits. BLIM Mechanical Interlock g Provides safe operation in a manual-operated changeover system g Makes the mechanical interlock of 2 circuit-breakers of the same frame size, preventing both MCCBs to be in ON position g It can be padlocked in 3 positions: MCCB1 ON and MCCB2 OFF, MCCB1 OFF and MCCB2 ON, MCCB1 OFF and MCCB2 OFF g BLIM allows padlocks with diameters of Ø4 ... 8 mm g For DWB160 and DWB250, it is possible to interlock 3 MCCBs...
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