DU Range of Mouded Case Circuit Breakers A Journey of Continuous Upgradation UTILITY DG SET BUILDING UPS BATTERY BANKS CAPACITOR
ABOUT US Larsen & Toubro is a technoogy-driven company that infuses engineering with imagination. The Company offers a wide range of advanced soutions in the fied of Engineering, Construction, Eectrica & Automation and Information Technoogy. L&T Switchgear, a part of the Eectrica & Automation business, is India's argest manufacturer of ow votage switchgear, with the scae, sophistication and range to meet goba benchmarks. With over five decades of experience in this fied, the Company today enjoys a eadership position in the Indian market with a growing internationa presence. It offers a compete range of products incuding powergear, controgear, industria automation, buiding eectricas & automation, reactive power management, energy meters, and protective reays. These products conform to Indian and Internationa Standards. Switchgear Factory, Baroda
INDEX Description Page No. Introduction 1 Saient Features 1 Technica Specifications 3 I-T Characteristic Curves 5 Dimensions 6 Ground Faut Modue 14
INTRODUCTION The DU Series, a new generation of MCCBs, stands out due to its state-of-the-art design, contemporary userfriendy features, ergonomics, aesthetics and compactness. DU Series compies with the atest standards ike IS/IEC 60947-2, IEC 60947-2 & EN 60947-2. The products conform to internationa standards, carry marking and are & CB certified. The range is speciay designed for tropica conditions, ensuring reiabe performance at high ambient and humid environments. The range can satisfy the most demanding system requirements. The DU Series, having a wide range of accessories, ensures operationa safety, reiabiity and versatiity. SALIENT FEATURES Technoogy Current Limiting MCCBs: The unique speed contact system with current imiting feature acceerates the opening of contacts during short circuit, resuting in very ow et-through energy No oad ine bias: Either side of MCCB termina can be used as oad or ine* MCCB Mechanism: Quick make, quick break & trip free mechanism Ergonomic Design & User Friendiness Knob designed for better grip Coor indication of ON/TRIP/OFF* Current rating on the knob Overoad adjustment from front* Easy ON/OFF/RESET operations Wide variety of snap fit accessories* Compact Compact size Common depth upto 250A 1 * For DU0D / DU125D / DU0H / DU125H / DU250C / DU250 / DU400N
SALIENT FEATURES Safe to Use Suitabe for Isoation* Finger proof terminas Phase barriers suppied aong with MCCBs to enhance the cearance between the phases Lockabe shroud on therma knob to prevent unauthorized operation* marked range* Doube Insuation: The interna accessories are housed in insuated casings to ensure first eve of insuation. And when the front cover is opened for fixing interna accessories, the MCCB is totay insuated, thus ensuring doube insuation* Interna Accessories Auxiiary contacts Trip aarm contacts Combined Auxiiary + Trip aarm contacts* Shunt reease Under Votage reease* A accessories are Snap fit type* Externa Accessories Direct & Extended * ROM with Padocking Spreader inks SS Encosure** GF modue for earth faut protection Easy to Insta 45mm door cutout upto 250A Optiona DIN rai mounting avaiabe** * For DU0D / DU125D / DU0H / DU125H / DU250C / DU250 / DU400N ** For DU0 / DU125U / DU0B / DU0D / DU125D / DU0H / DU125H 2
TECHNICAL SPECIFICATIONS DU Series Technica Parameters Type Designation Specifications DU0 DU125U DU0B No. of Poes 2/3 3 Rated Current I n (A) 16, 20, 25,32, 40, 50, 63, 80, 0 125 16, 20, 25, 32, 40, 50, 63, 80, 0 Impuse withstand Votage U imp (kv) AC Rated Operationa Votage Rated Insuation Votage Operationa Frequency (Hz) Utiisation Category Reference Temperature Operating Temperature Standard 240V AC U e (V) AC U i (V) AC 6 415 690 50 / 60 A 50 C -5 C to + 55 C IS/IEC60947-2, IEC60947-2 25 I cu (ka) 415V AC 250V DC (2P in series) L/R<15 msec 5-250V DC (3P in series) L/R<15 msec Rated Service S. C. Breaking Capacity (I cs) Singe stage capacitor rating at 415V, 50Hz (kvar) 50% of cu upto 50 kvar* (for 0A) & 65 kvar* (for 125A) 0% of cu Mechanica Life Eectrica Life No. of operations No. of operations 20000 6000 00 1500 IP Protection (from front side) Poution Degree Type of Reease Therma Magnetic IP40 III Therma - Magnetic Fixed Fixed (9I n) Termina Capacity (without spreaders) 2 Cabes with Lug ( mm ) Link (mm) 50 17 Overa Dimensions Width (mm) Height (mm) Depth (mm) Weight (2/3 Poe) (kg) 0.56/0.68 0.66/0.8 0.68 75 130 60 * Capacitor ratings are recommended with capacitor duty contactor - MO C 3
TECHNICAL SPECIFICATIONS DU Series Technica Parameters Specification Type Designation DU0D/DU125D DU0H/DU125H DU250C DU250 DU400N No. of Poes 3/4 2/3/4 3/4 2/3/4 2/3/4 Rated Current I n (A) 20, 25, 32, 40, 50, 63, 80, 0, 125 20, 25, 32, 40, 50, 63, 80, 0, 125 160, 200, 250 320, 400 Impuse withstand Votage U imp (kv) AC Rated Operationa Votage Rated Insuation Votage U e (V) AC U i (V) AC 6 415 690 8 690 800 Operationa Frequency (Hz) Utiisation Category Reference Temperature Operating Temperature Standard 50 / 60 A 0 40 C -5 C to + 55 C IS/IEC60947-2, IEC60947-2 & EN60947-2 240V AC 32 65 65 65 65 415V AC 18 30 25 36 50 I cu (ka) 250V DC (2P in series) L/R<15 msec - 15-15 25 250V DC (3P in series) L/R<15 msec 15 20 15 20 30 500V DC (3P in series) L/R<15 msec 15** 15** 20*** Rated Service S. C. Breaking Capacity (I cs) 0% of cu 50% of cu Singe stage capacitor rating at 415V, 50Hz (kvar) upto 50 kvar* (for 0A) & 65 kvar* (for 125A) upto 95 kvar* upto 150 kvar* Mechanica Life No. of operations 40000 000 000 Eectrica Life No. of operations $ 4000 3000 4000 IP Protection (from front side) Poution Degree Type of Reease Therma Magnetic IP40 III Therma - Magnetic Variabe (0.8-1.0I n ) Fixed (9I n) Termina Capacity (without spreaders) 2 Cabes with Lug ( mm ) 35 120 185 Link (mm) 17 26 32 Overa Dimensions Width (mm) 75/0 75/75/0 5/140 140/184 Height (mm) 130 165 205 Depth (mm) 60 60 1.5 Weight (2/3/4 Poe) (kg) 0.85/1.1 0.6/0.85/1.1 1.55/2 1.3/1.55/2 4/5 * Capacitor ratings are recommended with capacitor duty contactor - MO C ** ka at 500V d.c. (2P in series) L/R<15 msec *** 15kA at 500V d.c. (2P in series) L/R<15 msec $ 2500 for DU125D/DU125H Note : 2P MCCB S are avaiabe upto 0A in DU0H 4
I-T CHARACTERISTIC CURVES DU0 / DU125U / DU0B / DU0D / DU125D / DU0H / DU125H DU250C / DU250 000 000 00 00 0 0 Trip Time (s) 1 Trip Time (s) 1 9 n 9 n 0.1 0.1 0.01 t < ms 0.01 t < ms 0.001 0.001-1 1 2 Current mutipes (x/ n ) 3-1 1 2 Current mutipes (x/ ) n 3 DU400N 000 00 0 Trip Time (s) 1 9 n 0.1 0.01 0.001 t < ms 0.001-1 2 1 3 5 Note : A Curves are I r (rated current) based ti overoad zone. Current mutipes (x/ n )
DIMENSIONS DU0 / DU125U / DU0B DU0 2-Poe DU125U 2-Poe 3-Poe 12.5 75 50 25 12.5 75 50 25 75 28 115 28 115 1 28 7.5 12.5 25 25 11 11 115 28 22 28 25 25 DU0/DU0B 3-Poe with Spreaders DU125U 3-Poe with Spreaders 2-Poe, 3-Poe 12.5 75 13 22 13 12.5 75 13 22 13 60 28 115 171 193 115 28 171 193 130 45 5.3 2 Ø9 35 35 Ø11 35 35 DIN rai kit 26.5 92 95 79.6 Link width (without spreader) : 17mm Link width (with spreader) : 22mm Note: Spreader inks are avaiabe as spare. It is recommended to use spreader inks for enhancing termination capacity. A dimensions are in mm 6
DIMENSIONS DU0D / DU125D / DU0H / DU125H 2-Poe 3-Poe, 4-Poe 28 11 28 12.5 0 (4 poe) 25 25 25 75 (3 poe) 3-Poe with Spreaders 4-Poe with Spreaders 2-Poe, 3-Poe, 4-Poe 92 35 35 127 35 35 35 86.1 64 60 Termina 13.5 17 130 112 194.2 172.2 N s 50 72 Ø9 194.2 172.2 130 116.4 N s Ø9 22 13 13 30.2 11 Ø8.5 13 13 13 127 20 2 DIN rai kit 32.2 Link width (without spreader) : 17mm Link width (with spreader) : 22mm Note: Spreader inks are avaiabe as spare. It is recommended to use spreader inks for enhancing termination capacity. 7 A dimensions are in mm
DIMENSIONS DU250C / DU250 2-Poe 3-Poe, 4-Poe 35 18 17.5 35 35 35 3-Poe with Spreaders 4-Poe with Spreaders 2-Poe, 3-Poe, 4-Poe 35 19 35 19 18 35 19.5 35 19.5 35 19.5 35 60 257 221 165 145 126 38 257 221 165 145 126 38 N 35 35 Ø.2 5 (3P) 70 5 140 (4P) N Ø.2 54.5 72 54.5 72 Ø.2 54 54 54 5 (3P) 140 (4P) 18 4 64.5 93.7 197 Link width (without spreader) : 26 mm Link width (with spreader) : 35 mm Note: Spreader inks are avaiabe as spare. It is recommended to use spreader inks for enhancing termination capacity. A dimensions are in mm 8
DIMENSIONS DU400N 2-Poe 49 3-Poe, 4-Poe 140 (3P) 44.5 44.5 44.5 25.25 I 318 272 176 182 205 45 23 ON I TRIP OFF o N o Test 89 129 Ø.5 44.5 44.5 47.5 184 (4P) 3-Poe with Spreaders 4-Poe with Spreaders 2-Poe, 3-Poe, 4-Poe 141 115 Ø13 23.5 23.5 23 Ø13 23 21.5 23 23 26.5 1.5 5 I o 45 272 318 N I o 45 272 3 1 8 56.5 56.5 98 68 77 40 63.5 63.5 167 40 63 61.5 63 227.5 26.5 5 Link width (without spreader) : 32 mm Link width (with spreader) : 40 mm Note: Spreaders are avaiabe as spare. It is recommended to use spreader inks for enhancing termination capacity. 9 A dimensions are in mm
PANEL CUT-OUT DIMENSIONS DU0 / DU125U / DU0B DU0D / DU125D / DU0H / DU125H 25 For Fixing the MCCB Use Screw M4x55-4 Nos. 25 25 M3 x 38 mm Screw - 6 Nos. 1 26 47 28.5 112 1 (4P) 76 (3P) 29.5 2.25 48.5 52 46 39 N Cut-out 1 OR Cut-out 2 35 35 MCCB Mounting Hoes M5 x 80/15 Screw - 6 Nos. 70.5 70.5 44.50 44.50 52.50 38.25 82.75 141 (4P) 8 (3P) Cutout 176 79 58.6 42.6 126 50.5 50.5 DU250C / DU250 DU400N N 46 121 M4 x 60/15 Screw - 6 Nos. For Four Poe 38.8 A dimensions are in mm
ROM MOUNTING DIMENSIONS Direct ROM (DU0D / DU125D / DU0H / DU125H / DU250C / DU250 / DU400N) L5 L3 L4 L6 L2 Pane Cut-out L1 Pane Breaker Mounting Hoes Type L1 L2 L3 L4 L5 L6 L1 = Mounting Depth DU0D/DU125D/DU0H/DU125H DU250C/DU250 DU400N 96.5 96.5 145 58 73 121 52 52 87 43.5 56.5 41 37 54 82 85 77 95 L2/L3 = Pane Cut-out L4/L5 = Breaker Mounting Reference L6 = Depth outside the pane Note : For DU0/DU125U/DU0B Direct ROM dimensions pease refer product insert Extended ROM (DU0D / DU125D / DU0H / DU125H / DU250C / DU250 / DU400) MCCB Mounting Hoes As Viewed From the Front References as per MCCB Mounting L2 L3 45 Ø51 Ø76 L4 Ø4 L1 Pane Cut Detais 275 L Cut The Shaft to the Required Length = L Type DU0 L1 157 L L1-7 L2 7 L3 51 L = Length of Shaft required for Pane Depth L1 (mm) DU0D/DU125D/DU0H/DU125H DU250C/DU250 169 169 L1-119 L1-119 7.5 24.5 69.5 81.7 L1 = Min. Pane depth (mm) L4 = Depth outside the pane 11 DU400N A dimensions are in mm 233 L1-183 39 93
Ue(V)Icu(kA) Ics+50%Icu TEST Ue(V)Icu(kA) Ics+50%Icu TEST In:0A, Uimp:6kA Ue(V)Icu(kA) DN0-0C SS ENCLOSURE MOUNTING DIMENSIONS DU0 / DU125U / DU0B Ø26 k Out 2 No. 85 5 Encosure Thickness Degree of Protection 1.2 mm IP30 DU0D / DU125D / DU0H / DU125H Ø26 k out 2 No. 240 400 415 500 600 65 36 30 5 ON OFF I O 90 140 325 260 3 170 145 Ø40 k Out 1 No. 7 68 85 130 85 325 112 260 240 400 415 500 600 65 36 30 5 ON OFF I O 3 145 Ø40 k Out 1 No. 7 68.5 5 85 130 Encosure Thickness 1.2 mm Degree of Protection IP30 A dimensions are in mm 12
GROUND FAULT MODULE Ground Faut Modues are of Types GF1, GF2 and GF11. These modues are to be used with MCCBs for ground faut protection. The principe of operation is based on detection of the residua current in the system. They combine safety and versatiity, conforming to the high performance standards, the characteristic of a L&T products. Ground Faut Modue GF1 GF1 is suitabe upto 200A MCCBs Ground Faut Modue GF2 GF2 is suitabe upto 250A to 400A MCCBs Features Compact in size Soid state design Buit-in mouded CBCT for GF1 & GF2. Externa CTs are to be used for GF11 Suitabe for both 3 Phase 3 wire & 3 Phase 4 wire systems. In case of 3 phase 4 wire system, the natura cabe/twisted ink shoud aso be passed through the CBCT aong with the 3 Phase inks / cabes Buit-in test faciity Seection faciity for nomina current rating (I ) Earth faut setting is adjustabe from % to 50% of set current Seectabe trip times (0ms, 200ms) Manua reset for positive faut acknowedgment Potentia free NO contact to trip MCCB (through 240V shunt reease) Window dimensions suitabe for Cabe / Link connection in GF1 and GF2 n Ground Faut Modue GF11 GF11 is suitabe upto 800A MCCBs Note: MCCBs need to be fitted with 1V / 240V as shunt reease for Ground Faut Modue operation. Technica Data Specification Auxiiary Suppy Time Deay (ms) Pick-up Accuracy Output Contact Type GF1 / GF2 / GF11 Current Setting Range, I s (Is= x I n) % to 50% In in step of % 240V AC ±20% 0 / 200ms Fied seectabe ±%Is 1 NO contact manua reset type contact rating 5A 240V AC Indication Operating Temperature Insuation Mounting 2 Window for Cabe / Busbar Entry (mm ) Weight (kg) a) Power on LED b) Trip LED (manua reset) 0 0 + C to +55 C 2kV 50Hz for one minute across independent circuit 1kV 50Hz for one minute across open contacts Basepate mounting type GF1-1 x 32 GF2-165 x 61.5 GF1-1.2, GF2-2.2, GF11-0.9 Note : Pease check GF modue window size & MCCB busbar width with spreaders / without spreaders before seection of GF Modue. Pease contact nearest branch office for further information. 13
GROUND FAULT MODULE: OVERALL DIMENSIONS GF1 Termina Bock 24 1 32 Cabe / Busbar Entry (1 mm x 32 mm) 8 158 50 195 175 Use M4 Screw GF2 8.5 274.5 60 Cabe / Busbar Entry (165 mm x 61.5 mm) 5 71.5 71.5 5.5 175 15 54 Use M6 Screw 30 74 96 = 30 = 20 GF11 Termina Bock 8 158 50 195 Terminas for Externa CT Secondary Connection 77 66 30 = Termina Bock = 90 90 = 175 = Use M4 Screw A dimensions are in mm 14
Notes:
Aimed at maximizing productivity, conserving energy, minimizing costs and enhancing safety, our Eectrica & Automation training programmes have benefitted over 1.52 Lakh professionas in the ast 29 years. These training programmes are highy beneficia as they provide right exposure and impart knowedge on seection, instaation, maintenance and testing of Eectrica & Automation Products. So gain the advantage and go the extra mie with: 22 courses on contemporary topics Courses appicabe to a switchgear brands Training Centers in Pune, Lucknow, Coonoor, Vadodara, Dehi & Kokata Bend of theory and practica experience The typica training programmes cover: Low Votage & Medium Votage Switchgear Switchboard Eectrica Design AC Drives & Buiding Management Soutions Protective Reays & Earthing Power Quaity Soutions Pease contact any of the training centres for participation and detaied training programme schedue. Pune Larsen & Toubro Limited Switchgear Training Centre, T-156/157, MIDC Bhosari, Pune - 411 026 Te: 020 2712 0037 / 2712 0653 Fax: 020 2712 2933 E-mai: stc-pune@lntebg.com Lucknow Larsen & Toubro Limited Switchgear Training Centre, C - 6 & 7, UPSIDC P. O. Sarojininagar, Lucknow - 226 008 Te: 0522 247 6015 / 97944 54455 Fax: 0522 247 6015 E-mai: stc-ucknow@lntebg.com Coonoor Larsen & Toubro Limited Switchgear Training Centre, Ooty-Coonoor Main Road Yeanahai P.O., The Nigiris - 643 243 Te. : 0423 251 77 Fax : 0423 251 7158 E-mai: stc-coonoor@lntebg.com Vadodara Larsen & Toubro Limited Switchgear Training Centre Behind L&T Knowedge City, Near Viage Ankho, Vadodara - 390019 Te: 0265 2457805 E-mai: stc-vadodara@lntebg.com Dehi Larsen & Toubro Ltd Switchgear Training Centre 32, Shivaji Marg, Near Motinagar Metro Station, New Dehi - 1015 Te: 011 41419515 / 41419695 / 41419500 Fax: 011 41419600 E-mai: stc-dehi@lntebg.com Kokata Larsen & Toubro Limited Switchgear Training Centre 4th Foor, 3B, Shakespeare Sarani, Kokata - 700071 Te: 033 42005975 / 42005978 E-mai: stc-kokata@lntebg.com
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