Moulded Case Circuit Breakers
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1 Moulded Case Circuit Breakers DU Series
2 About us Larsen & Toubro is a technologydriven company that infuses engineering with imagination. The Company offers a wide range of advanced solutions in the field of Engineering, Construction, Electrical & Automation, Machinery and Information Technology. L&T Switchgear, a part of the Electrical & Automation business, is India's largest manufacturer of low voltage switchgear, with the scale, sophistication and range to meet global benchmarks. With over five decades of experience in this field, the Company today enjoys a leadership position in the Indian market with a growing international presence. It offers a complete range of products including powergear, controlgear, industrial automation, building electricals & automation, reactive power management, energy meters, and protective relays. These products conform to Indian and International Standards. Switchgear Factory, Baroda Index Description Introduction Salient Features Technical Specifications IT Characteristics Curves Overall Dimensions Page o. 4
3 Introduction The DU Series, a new generation of MCCBs, stands out due to its stateoftheart design, contemporary userfriendly features, ergonomics, aesthetics and compactness. DU0H/DU0 Series complies with the latest standards like IEC 947, E 947 & IS/IEC 947. The products conform to international standards, carry marking and are & CB certified. The range is specially designed for tropical conditions, ensuring reliable performance at high ambient and humid environments. The range can satisfy the most demanding system requirements. The DU Series, has a wide range of accessories, ensuring operational safety, reliability and versatility. Salient Features Technology Specially designed arc suction effect & speedo quench contact system o load line bias: Either side of MCCB terminal can be used as load and line* Ergonomic design & user friendliness Knob designed for better grip Color indication of O/TRIP/OFF* Current rating on the knob Overload adjustment from front* Easy O/OFF/RESET operations Wide variety of snap fit accessories* Compact Compact size Common depth throughout the range Suitable for side by side mounting Suitable for use in Distribution Board Internal Accessories Auxiliary contacts Trip alarm contacts* Combined Auxiliary + Trip alarm contacts* Shunt release Under Voltage release* External Accessories Direct & Extended ROM Spreader links Padlock is available (with ROM) SS Enclosure** GF module for earth fault protection Easy to Install 4mm door cutout* Optional DI rail mounting available** Safe to Use Finger proof terminals Lockable shroud on thermal knob to prevent unauthorized operation* marked range* Double Insulation: The internal accessories are housed in insulated casings to ensure first level of insulation. When the front cover is opened for the fixing of internal accessories, the MCCB is totally insulated ensuring the double insulation* * For DU0H & DU0 P & 4P MCCBs ** For DU0 & DU0H
4 Technical Specifications DU Series Technical Parameters Specification Type Designation DU0 DU0H DU0 o. of Poles //4 /4 Rated Current I n (A) 16,0,,,40,0,6,80,0 0,,,40,0,6,80,0 0,1,1,00,0 Impulse withstand voltage U imp (kv) 6 Rated operational voltage U e (V) 41 Rated insulation voltage U i (V) 690 Operational frequency (Hz) 0 / Utilisation Category A Reference Temperature 0 0 C 40 C Operating Temperature C to + C 40V a.c. 6 6 I cu (ka) 41V a.c. 0V d.c (P in series) L/R<1 msec V d.c. (P in series) L/R<1 msec Rated Service S. C. Breaking Capacity (I cs) 0% of lcu Mechanical Life o. of operations Electrical Life o. of operations IP Protection (from front side) Pollution Degree Type of Release Thermal Magnetic Terminal Capacity (without spreaders) Fixed IP40 III Thermal Magnetic Fixed (9I n) Variable ( I n ) Cables with Lug ( mm ) 0 10 Link (mm) Overall Dimensions <17 <6 Width (mm) 7 7/7/0 /140 Height (mm) Mounting Depth (mm) Weight (//4 Pole) (kg) /0.7/1 1.4/1.8
5 IT Characteristics Curves DU0/DU0H Time in Seconds Current multiples DU Time in Seconds Current multiples 4
6 Pole Overall Dimensions DU0 Pole with spreaders 7 1. Pole DU0H Pole, 4Pole Pole with spreaders 4Pole with spreaders Pole, 4Pole (4 pole) 7 ( pole) Terminal For Pole MCCB, refer Pole dimensions. Spreader links are available as spare. It is recommended to use spreader links for enhancing termination capacity. Pole, 4Pole Pole with spreaders DU0 4Pole with spreaders Pole, 4Pole Screw M6 Terminal 7.4 Ø s s (P) 140 (4P) Spreader links are available as spare. It is recommended to use spreader links for enhancing termination capacity (P) 140 (4P) All dimensions are in mm
7 DU0 Panel Cutout Dimension DU0H DU0 For Fixing the MCCB Use Screw M4x4 os. MF.4 Mounting Panel Cutout 1 OR Cutout eutral Pole Door Cutout Dimensions M4Ø. For Four Pole 8.8 ROM Mounting Dimension Direct ROM L L4 Type L1 L L L4 L DU0 1 L DU0H L1 Panel L Panel Cutout Breaker Mounting Holes DU L1 = Mounting Depth L/L = Panel Cutout L4/L = Breaker Mounting Reference Extended ROM MCCB Mounting Holes As Viewed From the Front References as per MCCB Mounting L L 4 Ø1 Ø76 Ø4 L1 Panel Cut Details 7 Cut The Shaft to the Required Length = L L Type DU0H DU0 L L L1119 L1119 L L L = Length of Shaft required for Panel Depth L1 (mm) L1 = Min. Panel depth (mm) All dimensions are in mm 6
8 Electrical Standard Products (ESP) Branch Offices: REGISTERED OFFICE AD HEAD OFFICE L&T House, Ballard Estate P. O. Box 78 Mumbai Tel: Fax: Website: ELECTRICAL STADARD PRODUCTS (ESP) 01, Sakar Complex I Opp. Gandhigram Rly. Station Ashram Road Ahmedabad Tel: Fax: espahm@ltebg.com 8, Cubbon Road, P. O. Box 098 Bangalore 001 Tel: / 004 Fax: espblr@ltebg.com 11/1, Zone II Maharana Pratap agar Bhopal Tel: / Fax: espbho@ltebg.com Plot o. 9, Annapurna Complex Lewis Road Bhubaneswar Tel: , Fax: espbbi@ltebg.com SCO, Sector 6D Madhya Marg, P. O. Box 14 Chandigarh Tel: , Fax: espchd@ltebg.com L&T Construction Campus TC1 Building, II Floor MountPoonamallee Road Manapakkam Chennai Tel: Fax: espmaa1@ltebg.com 67, Appuswamy Road Post Bag 716 Opp. irmala College Coimbatore Tel: / 1 / Fax: espcbe@ltebg.com Khairasol, Degaul Avenue Durgapur 71 1 Tel: 9848, 9849, 9844 Fax: espdgp@ltebg.com Milanpur Road, Bamuni Maidan Guwahati Tel: / 6 Fax: hazrasudipto@ltebg.com II Floor, Vasantha Chambers 17, Fateh Maidan Road Hyderabad Tel: Fax: esphyd@ltebg.com Monarch Building, 1st Floor D6 & 7, Amrapali Marg Vaishali agar Jaipur 0 01 Tel: to 18 Fax: espjai@ltebg.com Akashdeep Plaza, nd Floor P. O. Golmuri Jamshedpur Jharkhand Tel: / 8 Fax: espjam@ltebg.com Skybright Bldg; M. G. Road Ravipuram Junction, Ernakulam Kochi Tel: / 4 / / 7 Fax: espcok@ltebg.com B, Shakespeare Sarani Kolkata Tel: / / 4 Fax: 08 / espccu@ltebg.com A8, Indira agar, Faizabad Road Lucknow Tel: /04 Fax: esplko@ltebg.com o: 7, Karpaga agar, 8th Street K. Pudur Madurai Tel: , 68 Fax: espmdu@ltebg.com EBG orth Wing OfficeLevel Gate 7, Powai Campus Mumbai Tel: / 77 / 116 Fax: espbom@ltebg.com 1, Shivaji agar orth Ambazari Road agpur Tel: / Fax: / 0 espnag@ltebg.com, Shivaji Marg P. O. Box 6 ew Delhi 1 01 Tel: / / 6 Fax: espdel@ltebg.com L&T House P. O. Box /1, Dhole Patil Road Pune Tel: Fax: / esppnq@ltebg.com Crystal Tower, Plot o. 6/1 4th Floor, G. E. Road Telibandha Raipur Tel: espraipur@ltebg.com rd Floor Vishwakarma Chambers Majura Gate, Ring Road Surat 9 00 Tel: Fax: espsur@ltebg.com Radhadaya Complex Old Padra Road ear Charotar Society Vadodara Tel: / 1 / Fax: espbar@ltebg.com 48816, Dwarakanagar Visakhapatnam Tel: to 110 Fax: espviz@ltebg.com Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here. Larsen & Toubro Limited Electrical Standard Products Powai Campus, Mumbai Customer Interaction Center (CIC) BSL / MTL (toll free) : Reliance (toll free) : Tel : , Fax : cic@ltebg.com Website : SP 00 R1 9011
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