Presentation of Rsc Varanasi Editted

8/12/2019 Presentation of Rsc Varanasi Editted

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ACHIEVEMENT 2013-14 : AS ON 31.03.2014

Power Sector Northern Region

PARAMETER BUDGET RE ACTUAL % ARSC-VARANASI

GROSSTURNOVER

2000 1641 2011.12

CASHCOLLECTION

1700 1873.50

All Figures in Rs Lacs


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ACHIEVEMENT 2013-14 : AS ON 31.03.2014

Power Sector Northern Re ion

PARAMETER BUDGET RE ACTUAL % ACH

OBRA R&M

GROSS TURNOVER 625 420422.29 67

CASH COLLECTION 361 356.62 92

OBRA R&M [7&8]

GROSS TURNOVER 572 211 91.92 16

CASH COLLECTION 270 0.00

RIHAND R&M

GROSS TURNOVER 30 52 70.42 234

CASH COLLECTION 14 50.80 362



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PROJECTION FOR FY 2014-15

Power SectorNorthernRegion

PARAMETER BE FY-2014-1

RSC-VARANASIGROSS TURNOVER 1000

OBRA R&M

GROSS TURNOVER 900

OBRA 7 & 8

GROSS TURNOVER 740

RIHAND R&M

GROSS TURNOVER 40SINGRAULI ESP R&M

GROSS TURNOVER 350

TOTAL 3030



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BHEL, RSC-VARANASI

CURRENT YEAR PERFORMANCE AS ON 31.03.2014


ORDER BOOKED (FY 2013-14) R

CUSTOMER/PROJECT WORK

NTPC/SINGRAULI STPS Turbine & Generator

NTPC/TANDA Turbine & Generator

NTPC/UNCHAHAR TPS Turbine & Generator

NTPC/RIHAND STPS Turbine

UPRVUNL/ANPARA TPS Turbine & Boiler

UPRVUNL/PANKI TPS Turbine & Boiler

UPRVUNL/OBRA TPS Turbine & Boiler

PIPRI/UPJVUNL

TOTAL


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BHEL, RSC-VARANASI


ORDER BOOK (FY 2014-15)

CUSTOMER/PROJECT WORK

PREVIOUS YEAR CARRY FORWARD

NTPC/UNCHAHAR TPS Turbine & Generator

NTPC/RIHAND STPS Turbine

UPRVUNL/OBRA TPS Boiler

TOTAL

CURRENT YEAR

UPRVUNL/PANKI TPS Turbine & Boiler

TOTAL

EXPECTED ORDERS

GRAND TOTAL


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MILESTONE SCHEDULE : PLAN & ANTICIPATED

SL. PROJECT/UNIT No.

MW ActualDays

ContractualDays

Advance /On Time

Complen

1 ANPARA # 1 210 11 15 4 27.04.

2 ANPARA # 1 210 135 33

Demoblisation and re

mobilisation due to civil

work done by customer 16.10.

3 ANPARA # 3 210 30 30 0 12.12.

4 ANPARA # 5 500 31 35 4 07.03.

5 OBRA # 9 200 32 25 Extra work done 21/12/

6 PANKI # 4 105 13 18 5 16.10.



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MILESTONE SCHEDULE : PLAN & ANTICIPA

SL. PROJECT/UNIT No.

MW ActualDays

ContractualDays

Advance /On Time

Completio

7 PIPRI # 4 50 29 55 26 14.06.13

8 RIHAND #3 500 31 40 9 11.10.13

9 SINGRAULI # 3 210 14 15 1 23.04.13

10 SINGRAULI#6 500 6 15 9 26.04.13

11 TANDA # 1 110 49 50 1 23.10.13



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OUR ESTEEMED CUSTOMERSCUSTOMER /

PROJECT

100 MW 110MW 200 MW 210 MW 500 MW

UN

ANPARA 3 2

OBRA 3 5

PANKI 2

UPRVUNL 3 2 5 3 2 1

RIHAND 4

SINGRAULI 5 2

TANDA 4

UNCHAHAR 5

NTPC 4 5 5 6 2

THERMAL 3 6 10 8 6 3



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OUR ESTEEMED CUSTOMERSOTHER CUSTOMERS (INDUSTRIAL & HYDRO SETS)

CUSTOMER / PROJECT 12.5 MW 18 MW 22.4 MW 33 MW 50 MW

UN

UPJVNL/RIHAND HYDRO 6 6

IFFCO / PHULPUR 2 1 3

KSFL/SHAHJAHANPUR 2 2

UPRVUNL/OBRA HYDRO 3

TOTAL 2 1 2 6 6 1



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SOME OF THE TROUBLESHOOTING JOBS

CARRIED OUT


12/27

HIGH CHRONIC VIBRATION AT ANPARA

Severe Axial & Vertical vibration in Brg # 5 & Brg # 6 P High Vibrations were also noted in Stator Endshield an

header and increased seal oil flow. Vertical vibrations suddenly increased above 50 sand120 s& machine had to be debarred

Spectrum recorded showed sever 2x componentshigher frequency components & mapping was car

CONCLUSION:

VIBRATION I NDUCED WERE FOUNDATION IN

ELECTRICAL IN NATURE


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CRACKS WITNESSED

IN COLUMN


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CRACKS WITNESSED IN

BRG # 6 PEDESTAL


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ACTION TAKEN1. REPLACEMENT OF ROTOR AND BRG # 4&

2. REGROUTING OF SECONDARY FOUNDA

BRG 6 PEDESTAL AND STRENTHENING O

COLUMN NO 11& 12

RESULTS : MACHINE SUCESSFULLY SYNCH

WITH VIBRATIONS OF SHAFT BELOW 60

PK-PK AND PEDESTAL BELOW 30 PK-PK

BRGS


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MOULDS PREPARED FOR TEST & ITS TESTING


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HEAVY SPARKING AT EXCITER IN UNIT#4, PANKI (Heavy Sparking in exciter commutator of Unit # 4 Panki TPreported and soon the problem rose to alarming level an

had to be debarred on June 21 2013.

Vibrational analysis and electrical test were carried out by

and based on that following were suggested.

1)Undercutting of mica on the commutator

2)Carrying out the drop test on the commutator segments an

pitch apart & grrove chamfering and maintaining geom3)Checking the commutator for non uniformity, all the bru

their correct spring pressure and he usage of correct gra

brush.

Results : The sparking though reduced but still was not


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ACTION TAKEN BY RSC VARANASI RSC ENGINEER VISITEDTHE SITE AND FOU

THAT THE UNDERCUTTING & GOOVECHAMFERING WERE IMPROPER AND STI

DEMANDED MORE BUT THE COMMUTAT

BEING OLD AND REUSED CONTINOUSLY

SUSPICIONS OVER POSSIBILITY OF FURTUNDERCUTTING DAMAGING THE INSUA

THE EXCITER ARMATURE WAS SUGGESTE

REPLACEMENT AND UNIT WAS BROUGH

TO BAR WITHIN 7 DAYS.


19/27

CHRONIC AXIAL VIBRATION PROBLEM AT NUNCHAHAR U#3 (210MW) High axial vibration of LPT Rear Bearing in U# 3

values above 50s and velocity around 20 mm

The spectrum analyses revealed unloading of Brg

ACTION TAKEN1. CATENARY & DECK CORRECTION AND ALIGNMENT

2. DESTRETCHING & STRETCHING OF FOUNDATION BOL

BOLT WAS STRETCHED TO 2.43 AND THE FRONT BOLTS DEVI ATING FROM THR NORMAL APPROACH OF STRETC

FRONT TO A H IGHER AS COMPARED TO REAR TO ENSU

LOADING AS PER SPECTRUM

RESULTS

The axial vibration reduce to below 25 microns & Velocity to less t


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21/27

PEDESTAL 4 BOLT STRETCHING,U#3


22/27

SEVERE EARTH FAULT AT DEVIGHAT NEPA

(MACHINE BROUGHT TO GRID WITHIN 20 D

NEA had reported about the earth fault of stator Un

Devighat. BHEL RSC Varanasi engineer reportfor attending the earth fault.

Observations:Fault severe in nature resulting meltin

overhang portion of two coils of B phase & bur

of insulation of the nearby three other coils.

Constraints : Space constraint on removal of pole

constraint for removal of rotorSolution: Stator Removal Causing Both Time, Cost and


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Solution: Stator Removal Causing Both Time, Cost

easier Machine Re-levelled, aligned and Brought Back t

20thDay with better running parameters compa

other running Units

After replacement of the individual coils HV of the

were carried out at 14.2 KV for 1 minute.

After finalization of the stator the HV of all coils/p

carried out at 9Kv in two parts and IR and PI ta

SEVERE EARTH FAULT AT DEVIGHAT NEPAL

(MACHINE BROUGHT TO GRID WITHIN 20 DAYS)


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U# 2 w

vibratparam

comp3


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Documents

Presentation of Rsc Varanasi Editted