2. Signotron Tower. Plot J1-6, Block - EP, Sector - V Salt Lake Electronics Complex Kolkata - 700 091. Phone: +91 - 33 - 2357 3481/7274 Fax: +91 - 33 - 2357 7877 Mail: info@signotron.com

4. Promoted by technical entrepreneurs from IIT Kharagpur in 1985, Company initially started with manufacturing products for Industrial Control and Pollution Control. Gradually focus shifted to Power Electronics products, embedded electronics and renewable energy. Company Overview

5. Company have 50,000 sq. ft. space available for manufacturing facility in the prestigious electronics complex, Salt Lake, Kolkata. Companies human resource:- Company has a total strength of 116 employees. Graduate and Post Graduate Engineers. Diploma Engineers, Technicians. Office and Commercial staffs. Quality Certification – ISO 9000-2008. Company Overview

7. Company History & Milestones  1985 : Company incorporated with a Setup of a small manufacturing facility in South Kolkata.  1985-1994 : Company’s major thrust had been in manufacturing specialized Industrial Control products for Burner and Pollution Control - UV Flame Detector and Amplifier. - Microprocessor based Back Feed Sequence Controller  Having more than 10000 installations in India and abroad, the above products were supplied in Steel and Cement Plants, Oil refineries and Chemical Industries

8. Year 1991. A major diversification to Power Electronics products in Rolling Stocks. Introduced in Indian Railways MOSFET based Voltage Regulators for Motor Generator Sets of DC EMU’s. Developed energy efficient electronic lamp ballast for Railway Coaches. Implemented for the first time DC-DC Converter for Head Light Application in Indian Railways in lieu of rheostats. Company History & Milestones

9. Year 1996. Inverters 0.5 KVA to 5 KVA for Pantry Car applications. 5 KW DC-DC Converters for Hotel load applications of Diesel Locomotives for Sri Lanka Railways. Year 2000. First prototype unit for 3 phase Compact drive for fractional Horse Power Motors for Diesel Locomotives in lieu of small DC Motors. Company History & Milestones

10. Year 2002. Successful completion of field trials and acceptance of small AC Motors by Indian Railways for 100% replacement of existing small DC Motors. Year 2003. Commencement of Bulk Production of 3 phase Compact drives. Till date 80% diesel fleet of 4500 locomotives of Indian Railways has been installed with such compact drives. Total field population around 14000 as on date. Company History & Milestones

11. Year 2004. Thyristor based Battery Charge Discharging regenerative panel for VRLA batteries upto 70 KW. Year 2009. 28 KW naturally cooled, Battery charger with active P.F.C. for SGAC coaches of Indian Railways. Supplied more than 150 units to Indian Railways till date. Company History & Milestones

12. Year 2010. Grid tied Solar Inverter upto 100 KW rating. Voltage Controlled Static VAR compensator for Power Factor improvement. IGBT based Battery Charge / Discharge panel with active PFC upto 70 KW. Company History & Milestones

13. Future developments.  250 KWp grid tied solar inverter.  25 KVA Inverter for SGAC coaches of Indian Railways.  180 KVA Auxiliary Converter for electric locos.

15. Design & Development

17. Manufacturing Facilities ELECTRONICS. Facility for assembly and testing of PCBs with anti-static ESD protection flooring and separate dust free clean room. Surface mounted PCB manufacturing facility, equipped with machines like Screen Printer, Automatic "Pick & Place" machine, temperature controlled reflow oven, Ultrasonic PCB Cleaner etc. Facilities of these are available with Signotron approved outsourced vendors. Lead free reflow soldering facility. Wave soldering facility. Electronic Manufacturing Service (EMS). Automatic SMT pick & Place machine.

18. Manufacturing Facilities Place & Pick Machine Hot Air Reflow Soldering Machine Assembly Section

19. Manufacturing Facilities Heat Chamber Assembly room with Ionizer Heat Chamber

20. MECHANICAL. Full fledged CNC machine shop with modern machines including the followings:-  CNC lathe machines.  Gear hobbing machines,  Jig boring machine.  Multi-spindle drilling machine.  Cylindrical grinding machine.  Vibro-benz vibratory.  De-burring machine.  Ultrasonic cleaning machine etc. Facilities of these are available with Signotron approved outsourced vendors. Manufacturing Facilities

21. CNC Machine (Bending) CNC Machine (Punching)

23. Customers of Signotron Zonal Railways. Other Organisations.

25. Servicing Network.