ELECTRICAL TESTING AND AUTOMATION DIVISION MONTHLY ACTIVITY REPORT

MONTH: May YEAR: 2007 / Page No. 8 of 9

I.  ET & A METERING / PROTECTION / TESTING / COMMISSIONING SECTION.

  1. PERFORMANCE INDICES: -

Sr. No. / INDICES /
This month May 07
/ May 06 / YTM- FY 07 / YTM- previous year / Target
1 / Protection Performance Index (%) / 99.51 % / 98.57 % / 98.91 % / 98.34% / 98.9 %
2 / Protection Diagnostic testing Index (%) / 3.65 % / 7.6 % / 9.42 % / 16 % / 16.67 %
3 / Equipment Diagnostic testing Index (%) / 9.13 % / 9.5 % / 13.64 % / 17 % / 16.67 %
4 / Energy meter Diagnostic testing Index (%) / 57.53% / 56.10% / 57.53 % / 56.10% / 100 %
5 / External Customer Complaint Resolution Time (Avg.) in Days / 4.46 / 4.74 / 2.92 / 4.66 / 3.00
6 / Customer Complaint Satisfaction Index (on the scale of 0 – 5) / 4.55 / 4.73 / 4.56 / 4.59 / 4.65

B.  ACCEPTANCE TESTING IN LAB:-

ETA LAB / TOTAL / ACCEPTED / REJECTED / REMARKS
No. of Relays/jobs Tested in Relay Lab. / - / - / -
No of Meters in Meter (Saki + Trombay) Lab. / 60 + 1 / 60 + 1 / 0 + 0
No. of CT / PT tested in HT Lab. / - / - / -
No. of Instruments Tested in HT/ RLY Lab. / - / - / -
No. of Oil Sample Tested in Oil Testing Lab. / 33 / - / -
Calibration of Testing instruments / - / - / -
  1. MAJOR COMMISSIONING: -

1 / Energy Meters Commissioning / Meters /
Commissioned In this month
/ Cumulative up to this month
Whole Current / 0 / 0

CT Based

/ 0 / 0
Trivector / 8 / 17
2 / Consumer Sub Stations Commissioning / ·  30/05/07, Hara Estate, 3 way RMU, 1MVA transformer, LT panel (CSS)
·  BARC, 10MVA Transformer, 22KV Incomer & 5 nos 11KV panels -95% complete
·  9/05/2007, Mira Road, 20MVA Transformer-2, HT POL relay (7SJ600)
3 / Equipment Commissioning. / ·  Parel R/S: Tr. 2 LT breaker commissioned and transferred on 6.6kV B.S. 1 from 6.6 kV BS-2
·  Mahalaxmi R/S: PM#2 cable LILO arrangement to commission 110kV BEST GIS at Senapati Bapat Marg S/S.
4 / Protection System / relays Commissioning. / ·  Trombay A: Replacement of Existing EM Relays by Numerical O/C relays (7SJ600) on 22 kV BPCL # 1, BPPL # 1, Lube – India # 2 fdr.
·  Carnac R/S: – NGT 8 buchh. Relay alarm relay contact removed from trip circuit, Alarm contact was put in trip circuit due to repetitive mal operation of Buchh. Relay. The modification is not required with commissioning of new relay
·  Dharavi R/S: - DT-2 Duobias LTPOL module trip ckt segregation, DT-2 LT Bkr-BS-2 & BS-3 trip ckt segregation + separate E/F for each LT Bkr
·  Bhivpuri G/S: - At Bhivpuri G/S all 110 kV bays CT ratio of RADSS Bus fault protection core changed from 600/5A to 1200/5A to meet the requirement of proposed Bus section breaker CT ratio (800-1200-2000/5A)
·  Trombay B G/S: - 6.6 kV fdr - 206B DCD414B Relay is commissioned, Earlier 7SJ600 relay does not take CBCT I/P
5 / Metering activities / ·  Seggregation of meters for 110 KV Kalwa-Kalyan & Kalwa-Salsette lines by commissioning new meter for 100 KV Kalwa-Kalyan line.
·  Commissioning of MSETCL's ABT meter in series with the exisitng TPCL's ABT meters at all EHV Tie points between TPCL & MSEB.
·  Commissioning of meter at BEST's Senapati Bapat Marg GIS.
·  Commissioning of 3 Ph-4 Wire meter at Anti-friction Bearing Company at Lonavala.
·  Re-programming of 14 nos HT Public Utility meters as per MERC order.
·  Meter installed at BMC Bhandup was replaced due to defect in the optical port of meter.
·  Slave meter installed for Western Railway at Mahalaxmi was replaced due to defective display.
·  Commissionig of 13 nos meters at TPC - D points. (3 nos - Versova, 6 nos - Vikroli & 4 nos - Malad)
·  Commissioned AMR for Aditi complex. Communication between server at Saki and Aditi tried OK. AMR wiring is completed at Laxmi Finanace, ILFS , Shreji Indistries, Aapki Industries,Remi Busibess court, and Challenger towers. Meter configuration is in progress at the above complexes.
·  Lab trials of RCF new summation metering scheme completed. Joint testing of scheme with RCF is in progress. Modifications suggested by RCF have been referred to Elster for feasibility study.
·  Re-commissioning of meters at Vikas rubber after relocation of metering panel.
·  Attending YEL Discrepancies against zero consumption report.
·  MSEB data collection for calculating UI charges.
·  BEST, REL & RCF data collection for calculating the co-incident MD.
  1. MAJOR OCCURRENCES & INVESTIGATION: -

DIVISION / OCCURRENCES / INVESTIGATION
Mira Road S/S / ·  DT-2, DC ground was detected in 33KV Voltas breaker plug and socket arrangement. Socket and plug replaced with a spare one purchased from market.
Saki R/S / ·  4/5/2007, Transformer #1 110 kV breaker Hydraulic trips, LS gear mechanism failed. Replaced by electronic timer.
·  4&5/05/07, 22 kV Cap 3 and MIDC1/Vihar 1 feeder tripped simultaneously. Capacitor Bank 3 Raychem Cable termination (on paper insulated cable) breakdown leading to fire. Probably the ionisation vapour travelled to M1/V1 cubicle through opening between the two compartments resulting into tripping of feeder breaker.
Trombay A G/S / ·  24/05/07Unit # 4 was taken out due to heavy sparking on brushes, Insulation between Rotor and Slip-ring found burnt. Rotor IR was found to be Zero. Non-operation of Rotor E/F relay was investigated & found to be due to dropped trip links of DC injection voltage. Relay tested OK.
Trombay B G/S / ·  8/05/07, CWP # 6D tripped on E/F, Motor stator winding found shorted to ground.
Dharavi R/S / ·  03/05/07, Tr. 5 Lt bkr. Load sharing was found to be unequal. Investigation revealed Loose contact in LT breaker due to support insulator defect.
·  14/05/07, DT- 5 tripping on diff. relay, Wild cat found in LT bkr cable compartment which created flashover.
Carnac R/S / ·  23/5/07, Tr. 8 tripped on a feeder fault due to NGT8 buchh. Relay action, Mal operation of NGT Buchh. Relay. The Buchh. Relay has been replaced with an imported relay from CGL having magnetic reed relay contacts instead of mercury switches.
Mahalaxmi R/S / ·  27/05/07, Tr. 3 tripped on diff. relay action during charging. RADSB diff. relay mal operated during transformer charging after transformer diagnostic testing – possibly due to winding resistance test carried out in the last resulting in core magnetisation.

E.  FAULTS / ABNORMALITIES DETECTED DURING DIAGNOSTIC TESTING:-

Total No of faults detected. : - 03 nos.
Significant Defects Detected::-
·  Kolshet R/S:- 20 May 2007, 22 kV Pokhran 2 breaker C pole high contact resistance, C-pole replaced and tested on 21st May 2007
·  Dharavi R/S:- 20/05/07, ICT-9 MT B-ph bushing tan-d found high., Bushing replaced.
·  Backbay R/S: 13/05/07, ICT 1 – cable box buchh. Relay found not operating during oil draining; Relay
cleaned by draining oil for 3, 4 times and relay started functioning properly.

F.  FACTORY INSPECTION /ACCEPTANCE TEST :-

Sr. No. / FACTORY / DIVISION / EQUIPMENT & FINDINGS / LEARNINGS
1. / MSEB, Ghatghar / AMZ- 220 kV GIS Hi-Pot at GHATGHAR for Maharashtra Govt. Hydraulic division.
2. / Jojobera / PKK - Deputed to Jojobera for Unit-1 Protection rehabilitation activity from 18th May 07 to 27th May 07. Generator protection relays pre-commissioning tests were completed. The post commissioning tests are scheduled from 3rd June to 6th June 07.
3 / Yashmun Engg, Pune / SKP- Capturing of Thermal images during core flux test of 25 MW, AEG make Generator stator of IPCL, Nagothane

G.  COST SAVING :-

Relay Lab : Relay Lab : -

HV Lab: -

H: - COST OF POOR QUALITY / REWORK : NIL

Division

/ Description of poor quality / rework / No. of man hours spent

Carnac R/S

/ 23/05, 24/05, NGT 8 buchh. Relay mal operating on a feeder fault / 6 hrs

I: - NDB PARAMETERS

New

/ Different / Better
At Bhivpuri G/S , all 110 KV bays CT ratio of RADSS Bus fault protection core changed from 600/5A to 1200/5A to meet the requirement of proposed Bus section breaker CT ratio (800-1200-2000/5A).All 09 nos ,110 KV bays CTR changed in 10 hrs & thus Bus Fault protection was kept out for minimum possible duration

J.  MAN POWER DEVELOPMENT / ADMINISTRATION:-

SSD – 1. Conducted two workshops (2days each) of PBM training for level 3 process owners.
2. TBEM internal assessment Cat 3 team – Under progress.

II.  ET&A SCADA SECTION

A: - PERFORMANCE INDICES

INDICES /
This month May 07
/ May 06 / YTM- FY 07 / YTM- prev. year / Target
Availability Index (%)
Overall
T&D
LDC
Generating Stns. / 99.73%
99.49%
100.00%
99.93% / 90.78% / 99.80% / 99.60% / 99.50%

B: - COMMISSIONING

Station / Location / Equipment / Scheme /
Distribution Automation System for BKC / ·  Site Acceptance Test was continued for 8 RTUs of which 5 RTUs were submerged in the deluge of July 2005 and 3 are new. Input Output Checks completed for 7 of the 8 RTUs. RTU checks were done for 5 of the 8 RTUs. Local Control Module was configured for only 1 of the 8 RTUs. ABB is advised to complete all balance work prior to calling for SAT again.
C: – INVESTIGATION

A total of 15 Calls were attended in May`07

Station / Location / Equipment / Scheme / Occurrence Date / Status /
Dharavi / DAC-Node 2 failed, followed by complete failure of the SCADA System. / 26-May-06 / Connections of Communication Cables were tightened at the DAC-Node. This was followed by ‘startupi’ command. As an improvement I-O Boxes have been used and Factory-crimped Patch cords from a renowned manufacturer are used as in Structured Cabling. The system has been In Service since 31 May, 2006.

D: - MAN POWER DEVELOPMENT / ADMINISTRATION:-

· 

III.  ET & A COMMUNICATION SECTION.

MONTH & YEAR – May 2007

1. COMMUNICATION AVAILABILITY: -

Communication System Indices / May 07 (%) / May 06 (%) / Achieved for FY 2008 / Target for the FY 2008
Protection Channels / 100 / 99.95 / 100 / 99.9
Data channels / 100 / 99.96 / 100 / 98.0
Voice system / 100 / 99.98 / 99.87 / 99.0

% availability =

2. MAJOR INVESTIGATION & OCCURRENCES: -
Date / Division / Station / OCCURRENCES / INVESTIGATION
12 May 07 / Salsette / Salsette – Saki OPGW Fiber was damaged at a distance of 400m from Salsette. Pit marks were observed at midspan. New underground span is temporarily laid, and the services were restored.
Jobs that had taken more time than the standard time
Date / Division/ Station / System / Channels affected / Down Time
Nil

3.  BREAKDOWN MAINTENANCE ACTIVITIES : -

Date / Division / Description / Resolution time
Nil

4.  COMMISSIONING / PROJECT ACTIVITIES : -

Date / Division / Description
May 2007 / Trombay – A, Trombay – B, Trombay colony, Carnac, Bhira, Mulshi, Davdi and Bhivpuri. / Functional tests for Alcatel IP Telephone exchange were carried out at divisions as mentioned.
May 2007 / Khopoli, Lonavala , Bhira , Bhivpuri / E& M tie-line connectivity established between Khopoli –Bhira, Khopoli–Lonavala & Khopoli-Bhivpuri Exchanges as a backup link.

5.  Preventive Maintenance

Condition based maintenance for FOP, MW, PLCC initiated from October 2006.

8. MAN POWER DEVELOPMENT/ADMIN:

Date / Name / Description
7- 12 May 2007 / J M Balsara, Rupesh Patil / Training attended at ABS Bangalore, for new Alcatel telephone Exchange.

AGM(ET&A)

SKP:MVK

Station Wise Diagnostic testing Index 2007 - 2008
Sr. No. / Station / Diagnostic Testing indices
Equipment (%) / Protection (%) / Overall (%)
1 / Ambernath / 4 / 7 / 6
2 / Backbay-Tata / 42 / 2 / 8
3 / Bhira / 0 / 0 / 0
4 / Bhivpuri / 0 / 0 / 0
5 / Borivli / 19 / 15 / 16
6 / Carnac / 26 / 5 / 9
7 / Chembur / 6 / 2 / 3
8 / Chola / 0 / 0 / 0
9 / Dharavi / 43 / 5 / 13
10 / Grant Road / 0 / 100 / 100
11 / Kalyan / 11 / 17 / 16
12 / Khopoli / 8 / 3 / 4
13 / Kundli / 0 / 0 / 0
14 / Kolshet / 54 / 59 / 58
15 / Mahalaxmi / 26 / 5 / 10
16 / Malad / 0 / 0 / 0
17 / Mankhurd / 0 / 0 / 0
18 / Panvel / 0 / 13 / 6
19 / Parel / 19 / 4 / 7
20 / Saki / 25 / 39 / 35
21 / Salsette / 15 / 40 / 35
22 / Trombay-A / 13 / 10 / 11
23 / Trombay-B / 5 / 2 / 3
24 / Versova / 17 / 27 / 25
25 / Vikhroli / 0 / 0 / 0
26 / Consumer-Saki / 0 / 0 / 0
27 / Consumer-Salsette / 0 / 0 / 0
28 / Consumer-Borivli / 0 / 0 / 0
29 / Dist.+BKC+BMC / 0 / 0 / 0
Total / 14 / 10 / 11