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Prem kant panjiyara

EE906405218286

RIMT -IET

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Undergoing summer training at USHA MARTIN LTD, RANCHIwas a very nice experience. We would like to extend our heartiestthanks to Mr. sanjay srivastav and Mr. B.P. singh for theirguidance and cooperation. In spite of their busy daily work theyguided us in learning the power distribution at USHA MARTINLTD, RANCHI in a short span of time. We also thank, Mr. Arvind

kumar of HRD dept. of USHA MARTIN LTD, RANCHI forconducting such a training programme for us.

Premkant Panjiyara

90640518286

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UML is the 2nd largest wire and rope manufacturer in the world and has the largest variety inSouth East Asia.

It is multi product, diversified engineering conglomerate with 10 production units in India,1 inThailand,1 in UK and 1 in Dubai.

It is saving valuable foreign exchange by exporting by exporting its products to 42 countrieslike USA, Africa and Middle East, conforming to the strictest product quality standards.

It got the ISO 9000 Certification by BVQI in 1994.

ICICI (BCB) did the business process re-engineering in 1996 and line system was set up toenhance performance.

With the modern concepts like TPM, value engineering, QC, suggestions scheme, customersatisfaction and human resource development, UML is trying to reach unparalleled heights.

UML is serving through a leading daily Prabhat Khabar, Krishi Gram Vikas Kendra, UshaMartin Technical Institute.

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USHA MARTIN substation receives 33 kv from JSEB(Jharkhand state electricity board). A currentand potential transformer unit (CT /PT) measure incoming voltage and current at substation. Thesereadings are shield in a room for JSEB observation. The company measure tha incoming current byinstallin its own current transformer(CT).

An isolator or air break switch is provided for isolation of CT and transformer under circumstances

like high high power flow maintenance fault repairing from isolator supply connection goes toO.C.B.

An O.C.B(oil circuit breaker) is used to break the circuit in case of undesirable high powerflow.O.C.B automatically breaks the circuits as the current increase beyond safe limit. Some time thecircuit is open manually during fault repair in substation. After O.C.B the supply power passesthrough CT where the supply current is measured from companys observation.

Incoming power from CT is given to a 33 kv swing busbar from where it is distributed in many ways.A Potential transformer(PT) at one end of the bus bar is connected to measure the incoming voltagefor companys observation.Five transformers are connected to this busbar.Transformer 1(3mva. 33 kv/11kv) connected to the busbar indirectly through air break switch andO.C.B converts 33 kv to 11kv secondary side.Similary transformer no 2&3 of same rating are connected to 33 kv bus bar.Transformer no.4 connected in similar way but of different rating that is 33kv/433kv provides 433v toROPERY and FURNACE.

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TransformerDistribution panelAir break switchOil circuit breaker

Air circuit breakerU.P.SDiesel generatorDisc insulatorPin insulatorLighting arrestor

Bus couplerBus barContactorsPower factor unit

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