About us. Switchgear Factory, Mumbai

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Toby Henderson
5 years ago
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1 LTXL Capacitors

2 LTXL Capacitors

3 About us Larsen & Toubro is a technology-driven USD 9.8 billion company that infuses engineering with imagination. The Company offers a wide range of advanced solutions in the field of Engineering, Construction, Electrical & Electronics, Machinery and Information Technology. L&T Switchgear, which forms 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 four decades of experience in this field, the Company today enjoys a leadership position in the Indian market with growing presence in international markets. It offers a complete range of products including controlgear, powergear, motor starters, energy meters, wires and host of other accessories. Most of our product lines conform to international standards, carry CE markings and are certified. Switchgear Factory, Mumbai

LTXL Capacitors The LTXL range of capacitors are designed for Ultra heavy duty applications and can withstand heavy load fluctuactions, inrush current and harmonics.

4 LTXL Capacitors The LTXL range of capacitors are designed for Ultra heavy duty applications and can withstand heavy load fluctuactions, inrush current and harmonics. Applications Applications such as welding, steel rolling, etc., with heavy load fluctuations and high thermal loading Systems with high harmonic distortion levels Systems with high dv/dt Tuned harmonic filter Features Long life expectancy (upto hrs) Maximum inrush current withstand capability (upto 500 times I R) Low power loss (0.35 W/kVAr) Overpressure disconnector Capacitor Health Monitor as an add-on (on request) Shock hazard protected terminals Maintenance-free LTXL Cylindrical PP Film Double Side Metallised Paper LTXL Capacitor The winding element of the LTXL Cylindrical capacitor consists of a dielectric of polypropylene film and an electrode of double-sided metalized paper. This winding construction achieves low losses and high inrush current withstand capability. Non-PCB oil used for impregnation, enables good heat dissipation from the winding element to the aluminum can's surface, thus preventing hot spots in the winding element. The capacitor is designed to cover ambient temperatures of up to 70 C. Self-Healing At the end of service life, or due to inadmissible electrical or thermal overload, an insulation breakdown may occur. A breakdown causes a small arc which evaporates the metal layer around the point of breakdown and re-establishes the insulation at the place of perforation. After electric breakdown, the capacitor can still be used. The decrease of Capacitance caused by a self-healing process is less than 100 pf. The self-healing process lasts for a few microseconds only and the energy necessary for healing can be measured only by means of sensitive instruments. 1

5 LTXL Box For any capacitor, its life largely depends upon the operating temperature. LTXL box type capacitors use advanced APP technology. By employing thicker aluminium foil, thicker polypropylene film and special impregnants, LTXL box type capacitor is able to operate at lower temperatures and hence achieve longer life. These capacitors are thus able to withstand stringent operating conditions. The higher surface area and special epoxy based coating also ensures better heat dissipation. Advanced APP PP Film Al Foil Capacitor Technology In LTXL box, two polypropelene films and two Al films are grouped together as shown in the figure below. The wave-cut and heavy edge metalized films are then rolled to form a capacitor element. Many such capacitor elements are pressed and stacked together and are internally connected in parallel. Depending upon the rating of the capacitor, the number of stacks will differ. These stacks will be placed inside the case and they are vacuum impregnated with non- PCB, biodegradable impregnants Al Film Polypropylene Film Electric Contact (schooping) Bare PP Film Edge Design of LT Capacitor Each capacitor elements is protected by an internal fuse as shown in the figure below. If there is any internal short circuit in any of the capacitor element, fuse of that corresponding capacitor elements will blow and remaining elements will be protected. capacitor element fuse blown fuse 2

6 Technical Specifications Advanced APP Range Type Standards Rated Frequency Rated Voltage Over Voltage Overcurrent Peak Inrush current Operating Losses (Dielectric) Operating Losses (Total) Tolerance on Capacitance Degree of Protection Ambient Temperature Cooling Permissible Relative Humidity Maximum Operating Altitude Mounting Safety Features Impregnation Casing Dielectric Composition Terminals Discharge Resistors / Time Switching operations (maximum) 3-50 kvar Ultra Heavy Duty IS , IS , IEC IS , IEC Hz, 60 Hz 415 / 440V (other ratings on request) +10% (12h/24h), +15% (30m/24h), +20% (5m/24hrs), +30% (1m/24hrs) Upto 3 x I N Upto 500 x I N < 0.2 W/kVAr < 0.35 W/kVAr -5 / +10% as per IS IP20, indoor mounting -25 C to 70 C Natural or forced air cooling max 95% 4000m above sea level LTXL Cylindrical upright or horizontal Overpressure disconnector Non PCB, biodegradable oil Extruded aluminum can Polypropylene film with tissue paper as electrode carrier (Double side metalized) Clamptite kvar < 0.2 W/kVAr < 0.35 W/kVAr IP52 with terminal cap upright Internal Fuse Discharge Resistors fitted, Standard discharge time 60 seconds, Other discharge times on request switchings per year, switchings per year (with reactor) LTXL Box Non PCB, biodegradable oil CRCA Biaxillay oriented polypropylene film with aluminium foil electrode Porcelain Bushing 3

7 Ordering Information of Capacitor LTXL Cylinder Dimensions Sr. No Voltage (Vn) Power (Qn) (kvar) Capacitance (µf) Rated current (A) Dimension in (mm) 50Hz 60 Hz 50Hz 60 Hz D H Cat. Nos. 5±0.5 Marking LTCCU312B2 h+40 h LTCCU315B2 LTCCU320B2 d LTCCU325B M12 Torque T = 10 Nm Impregnating hole Torque T = 1.2 Nm d+d 1 d 19.6 ± ± 0.5 LTXL Box Dimensions d 1= mm (depending on the capacitor type; for details please refer to the data sheet) Creepage distance 12.7 mm min. Clearance 9.6 mm min. Rating (kvar) L (mm) W (mm) H (mm) L1 (mm) M-10 Threaded Brass Terminal L L1 Elevation w End View L T C C U B 2 L&T Capacitors Type Duty Phase Rating kvar Voltage C - Cyl U - Ultra B - Box 4

8 Notes:

9 Electrical Standard Products (ESP) Branch Offices: REGISTERED OFFICE AND HEAD OFFICE L&T House, Ballard Estate P. O. Box 278 Mumbai Tel: Fax: Website: ELECTRICAL STANDARD PRODUCTS (ESP) 501, Sakar Complex I Opp. Gandhigram Rly. Station Ashram Road Ahmedabad Tel: Fax: / esp-ahm@lntebg.com 38, Cubbon Road, Post Box 5098 Bangalore Tel: , Fax: esp-blr@lntebg.com 131/1, Zone II Maharana Pratap Nagar Bhopal Tel: / 7 / 8 / 9 Fax: esp-bho@lntebg.com Plot No. 559, Annapurna Complex Lewis Road Bhubaneswar Tel: , Fax: esp-bbi@lntebg.com SCO 32, Sector 26-D Madhya Marg, P. O. Box 14 Chandigarh Tel: to 7 Fax: esp-chd@lntebg.com 10, Club House Road Chennai Tel: / 4 / 5 / 2109 Fax: / 3 esp-maa@lntebg.com 67, Appuswamy Road Post Bag 7156 Opp. Nirmala College Coimbatore Tel: / 1 / 5 Fax: esp-cbe@lntebg.com L&T House, Group MIG - 5 Padmanabhpur Durg Tel: / 14 / 28 / 29 Fax: A1/11, Astronauts Avenue Bidhan Nagar Durgapur Tel: / 8952 / 7844 Fax: esp-dgp@lntebg.com Milanpur Road, Bamuni Maidan Guwahati Tel: Fax: esp-gau@lntebg.com II Floor, Vasantha Chambers , Fateh Maidan Road Hyderabad Tel: Fax: esp-hyd@lntebg.com D-24, Prithvi Raj Road, C-Scheme Jaipur Tel: / 8 Fax: esp-jai@lntebg.com Akashdeep Plaza, 2nd Floor P. O. Golmuri Jamshedpur Jharkhand Tel: / 387 Fax: esp-jam@lntebg.com Skybright Bldg. M. G. Road Ravipuram Junction, Ernakulam Kochi Tel: / 4 / 5 / 7 Fax: esp-cok@lntebg.com 3-B, Shakespeare Sarani Kolkata Tel: / 3 / 4 Fax: esp-ccu@lntebg.com A28,Indira Nagar, Faizabad Road Uttar Pradesh, Lucknow Tel: / 5 / 6 Fax: esp-lko@lntebg.com Plot No th Main Road K. K. Nagar Madurai Tel: , Fax: esp-mdu@lntebg.com EBG North Wing Office - 2 Powai Campus Mumbai Tel: / 2737 / 6 Fax: esp-bom@lntebg.com #12, Shivaji Nagar North Ambazari Road Nagpur Tel: / 3 Fax: / 30 esp-nag@lntebg.com 32, Shivaji Marg P. O. Box 6223 New Delhi Tel: / 5 / 6 Fax: esp-del@lntebg.com L&T House P. O. Box /1, Dhole Patil Road Pune Tel: Fax: , esp-pnq@lntebg.com 3rd Floor Vishwakarma Chambers Majura Gate, Ring Road Surat Tel: Fax: esp-sur@lntebg.com Radhadaya Complex Old Padra Road Near Charotar Society Vadodara Tel: / / 1 / 2 Fax: esp-bar@lntebg.com , Dwarakanagar Visakhapatnam Tel: / 3 Fax: esp-viz@lntebg.com Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here. Electrical Standard Products Larsen & Toubro Limited Powai Campus, Mumbai Customer Interaction Center (CIC) BSNL / MTNL (toll free) : Reliance (toll free) : Tel : Fax : cic@lntebg.com Website : SP

10 Advanced APP PP Film Al Foil

HRC Fuse-links Bolted Type HG 2 A - 32 A HQ 2 A A

HRC Fuse-links Bolted Type HG 2 A - 2 A - 630 A HRC Fuse-links Bolted Type Larsen & Toubro Limited, India s largest manufacturer of low tension switchgear, offers FN range of SDFs suitable for Bolted Type