Regulated D.C. Power Supply

Uploaded on : March 2010

Product and Applications

Regulated DC power supplies provide accurate DC voltage which is derived from AC mains. These D. C. power supplies are extensively used in various electronic laboratories and Industries to provide accurate D.C voltage. Such supplies provide constant voltage irrespective of load variations for which they are designed. DC power supplies are used extensively in electronics laboratories, industries, and communication departments to feed DC voltage, R and D institutions and colleges. Such regulated power supplies are needed in process where pure DC voltage without any distortion is needed. The output of the system is filtered in stages to provide pure DC supply.

The manufacture of DC power supplies involves design assembly and testing. The product is an assembly oriented one. It basically comprises a steel/plastic cabinet to house various sub assemblies like transformers, PCBs Transistors, switches, and other passive devices. The sub assemblies are checked for quality before installation on the chassis. The tests are conducted to confirm the operation as per the specification. The relevant Indian Standards for the product are: IS 7204, part 1-4.

Industry Profile and Market Assessment

There are many small scale manufacturers engaged in its manufacture. The production of Computers, defence and communication equipment is rapidly increasing. The number of Technical Institutes in the country has grown considerably in the recent past as also the number of laboratories. There is thus a good market for the product.

Manufacturing Process & Know How

The manufacturing process comprises assembly of different components on printed circuit boards and soldering the components. The sub assembly is then housed in a suitable enclosure. The other components such as transformers switches etc. are wired and fixed on the chassis. The assembled power supply is tested for performance and adjustments needed for proper operation and to meet specification requirements are carried out. The power supply shall generally comply to Indian standard IS: 7204.

Production capacity per annum of the unit is envisaged as 2400 nos per annum in two capacities 5volts, 5 Amps and 30 volts, 2 Amps equally at a sale price of Rs. 1700 and Rs. 2400 each respectively. The sales turnover is Rs.49.20 lakhs

Know how is available with Central Government laboratories.

The unit will require a power of 5KVA.

Plant and Machinery

Since the manufacturing process involved is basically an assembly oriented one, with metal working the major plant and machinery involved include Bench grinder, Drilling machines, Digital multimeter, variac, H.V.Tester, Meggar, Oscilloscope, Office furniture, equipment, Panel for testing, Soldering iron and tools etc. The total cost of plant and testing equipment etc. is estimated to be approx. Rs. 2,00,000/-.

Raw material and Components

The basic raw material and components required are indigenously available and comprise items like, ICs, SCRs, LEDs, Neon indicators, Transistors, Diode, Resistors, Capacitors, Transformers, Switches, PCBs, Push button assembly, cabinet chassis, and hardware items etc. The total cost of raw material and components is estimated to be about Rs. 30.00 lakhs per annum.

Land and Building: For smooth operation of the unit it will require a built up area of 200 sq. mts. The space needed can be taken on rental basis.

Manpower

For smooth functioning of the unit the requirement of man power is expected to be around 6 persons.

Technical staff	self
Skilled & Semi skilled workers	5
Office staff	3
Office helpe	1

The annual salary bill is estimated to be around Rs.4.00 lakhs.

Cost of Project

	Rs. lakhs
Land & Building
Plant & Machinery	2.00
Other assets	0.40
Margin money	2.46
Total	4.86

Profitability

	Rs. lakhs
Sales (1200 nos 5A, 5v)	49.20
1200 nos. 30v, 2A
Raw material	30.00
Salary	4.00
Other expenses	5.90
Depreciation	0.30
Interest	0.20
Cost of production	40.40
Profit	8.80

Requirement of Working Capital

			W.C Margin money
Raw material	2 month	5.00	1.25
Work in process	15 days	1.42	0.14
Stock of finished goods	1 month	3.36	0.33
Working expenses	1 month	0.33	0.33
Sale on credit	1 month	4.10	0.41
Margin money for W.C			2.46

Break Even point

• 64% at installed capacity

Machinery Suppliers

Bharat Electronics ltd
Jalhalli,
Bangalore.

M/S British Physical Laboratories,
NehPlace,
New Delhi.

Choudhury Trading Co.
Bhagirath Placee,
Delhi.

M/S ECIL,
Cherlapalli,
Hyderabad.

M/S Pieco Electronics and Electricals Ltd.
Ramon House,
Backbay Reclamation,
Mumbai

M/S Transtronix India P. Ltd.
Okhls ph II
New Delhi.

Swastic Drilling Co. Ltd.
2778/8 Hamilton Road,
Mori Gate,
New Delhi.

For further information please contact

Information Manager
TIMEIS Project
E-mail: timeis@ficci.com