ELECTRICAL TESTING AND AUTOMATION DIVISION MONTHLY ACTIVITY REPORT

MONTH: April YEAR: 2007 / Page No. 8 of 8

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

A.  PERFORMANCE INDICES: -

Sr. No. / INDICES /
This month April 07
/ April 06 / YTM- FY 07 / YTM- previous year / Target
1 / Protection Performance Index (%) / 98.09 % / 98.01 % / 98.09 % / 98.01% / 98.9 %
2 / Protection Diagnostic testing Index (%) / 7.55 % / 8.6 % / 7.55 % / 8.6 % / 8.33 %
3 / Equipment Diagnostic testing Index (%) / 3.78 % / 7.5 % / 3.78 % / 7.5 % / 8.33 %
4 / Energy meter Diagnostic testing Index (%) / 58.71 % / 56.06% / 58.71 % / 56.06% / 100 %
6 / External Customer Complaint Resolution Time (Avg.) in Days / 1.38 / 4.57 / 1.38 / 4.57 / 3.00
7 / Customer Complaint Satisfaction Index (on the scale of 0 – 5) / 4.57 / 4.44 / 4.57 / 4.44 / 4.65

B.  ACCEPTANCE TESTING IN LAB:-

ETA LAB / TOTAL / ACCEPTED / REJECTED / REMARKS
No. of Relays/jobs Tested in Relay Lab. / 1 / 0 / 1 / EE make VAA33
No of Meters in Meter Lab. / 6 / 6 / 0
No. of CT / PT tested in HT Lab. / 6 / 6 / 0
No. of Instruments Tested in HT/ RLY Lab. / 13 / 12 / 1 / CSD make Time Display unit
No. of Oil Sample Tested in Oil Testing Lab. / 32 / 28 / 4 / Salsette : NGT # 1 & ST # 2 Borivali : TR # 1 NGT & 2 NGT
Calibration of Testing instruments / 0 / 0 / 0

C.  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 / 9 / 9
2 / Consumer Sub Stations Commissioning / 1.  New RMU was commissioned near Tower#64 at BARC which is fed from Mankhurd R/S. This new 22kV feeder will help in improving reliability of Supply to DCSE.
2.  LT breakers of Crompton Greaves Make have been replaced as a part of Load enhancement at Consumer S/S Intelenet & Enron.
3 / Equipment Commissioning. / ·  Bhivpuri R/S:
New static Governor commissioning on TRPH unit, Bhivpuri.
4 / Protection System / relays Commissioning. / Trombay A:
a) Replacement of DT # 4 Existing BDD relays by ER Make Numerical Relay – DUO-BIAS
b) Relay. Replacement of Existing EM Relays by Numerical O/C relays (7SJ600) on 22 kV BPCL # 2 fdr
·  Versova R/S:
a) Existing ICM21 POL of Trf-1 LT Breaker-1A was replaced by new 7SJ600 relay as a part of capex items.
b) Existing UFLS FCX relay was replaced by New MICOM P923 Relay.
·  Borivli R/S:
a) 7SJ600 Relay on Trf-1 22 kV Incomer LT Breaker of Bus-1 & Bus-2.
5 / Metering activities / ·  Routine testing carried out for all MSEB metering points.
·  Routine testing carried out for Central & Western railway metering points.
·  Two nos of ABT compatible meters being commissioned at Indorama, Nagpur.
·  Trials of RCF summator scheme is under process at Trombay lab.
·  Panel wiring of metering panel is being completed at Senapati Bapat Marg receiving station of BEST.
·  Defective TVM is replaced at WACO.
·  At Intelenet substation, co-incident MD scheme is kept ready using two nos of SL7000 meters.
·  Helped TPTCL to complete formalities regarding sale of power by M/s Indorama Synthetics,Nagpur.
·  Mr.SCD /Mr.JDS participated in discussions at MERC on Meter code for Interface metering of Transmission Utility.
·  Mr.SCD participated in energy accounting meeting held at SLDC,Kalwa
·  Compiled data for installation of TPC-G,TPC-D meters.

D.  MAJOR OCCURRENCES & INVESTIGATION: -

DIVISION / OCCURRENCES / INVESTIGATION
Saki R/S / On 15.04.07: Tripping of Transformer at Marwha was investigated. VIP relay setting was found to be lower.
Mira Road S/S / On 11.04.07: 20MVA Transformer at Mira Road tripped without any relay indication. Investigation revealed requirement of certain modifications in configuration of newly commissioned Transformer Differential Relay Type 7UT612.
Jojobera G/S / On 06/04/07: 60 MVA ST-1 tripped on Buchholz Relay for outgoing 33kV feeder fault. DGA and electrical tests indicate internal arcing. The repaired ST-2 has been commissioned on war footing.

E.  FAULTS / ABNORMALITIES DETECTED DURING DIAGNOSTIC TESTING:-

Total No of faults detected. : - 00 nos.
Significant Defects Detected::-

F.  FACTORY INSPECTION /ACCEPTANCE TEST:-

Sr. No. / FACTORY / DIVISION / EQUIPMENT & FINDINGS / LEARNINGS
1. / Siemens, Kalwa. / GTJ - Inspection of 110 kV HPCL # 3 & 4 Bay Relay Panel on 20/04/07
2. / MSEB, Ghatghar / AMZ / PKK - HV Testing on 245 kV Toshiba make GIS at Ghatghar from 23rd April 07 to 25th April 07.
3 / L&T factory / AMZ - Visit to L&T factory to study SR18G properties.
4 / CGL Nasik / SGJ - 145kV SF6 Breaker inspection

G.  COST SAVING :-

Relay Lab : Relay Lab : Nil

HV Lab: Rs 2000/-

H: - COST OF POOR QUALITY / REWORK : NIL

Division

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

I: - NDB PARAMETERS

New

/ Different / Better
1.Commissioning of two nos of ABT compatible meters at M/s Indorama Synthetics, Nagpur to facilitate Power purchase. The job was carried out in coordination with TPC-Power trading Division and MSETCL & MSEDCL, Nagpur. / 1.  Diversion of OPGW cable at Trombay (near Aegis Chemicals). Trombay-Parel & Trombay-Dharavi Tower line has been diverted on new tower. The OPGW cables were re-routed & spliced after diversion of Tower line.
2.  Influence of tap-changer operation on load delivered to Consumer was studied at Hiranandani, Reservoir plot, BKC, Dahisar and Vasant Utsav S/S. / New 22kV RMU was commissioned near Tower#64 at BARC which is fed from Mankhurd R/S. This new 22kV feeder will help in improving reliability of Supply to DCSE

J.  MAN POWER DEVELOPMENT / ADMINISTRATION:-

Training on Automatic Relay Test kit was arranged at Relay Lab on 16 & 17 April, 2007.
U G Phutane attended Conference on Emerging trends in EHV Switchgear

II.  ET & A SCADA SECTION

A: - PERFORMANCE INDICES

INDICES /
This month Apr 07
/ Apr06 / YTM- FY 08 / YTM- prev. year / Target
Availability Index (%)
Overall
T&D
LDC / 99.89%
99.87%
99.48% / 99.87% / 99.89% / 99.87% / 99.60%

B: - COMMISSIONING

Station / Location / Equipment / Scheme /
Condition based Maintenance / Back ups / P M / Target for 1st Trimester
3.5% / 0% / 33.33%
·  SCADA Back up of Borivli system taken
·  Backup of ABB RTU at Grant Road taken and reloaded after UPS replacement.. /
Parel / Configuration of additional ports in D200 RTUs at Parel and Mahalaxmi for connectivity to new Master at LD carried out..
Dharavi / 2 Nos additional Ports in D-200 RTUs at Backbay and BKC for connectivity to New Master at LD were configured and tested
LDC / Data collection, verification and finalisation of I/O list, SLDs, report displays and Data for EMS applications for all G/S & R/S are being done by respective SCADA co coordinators as a part of SCADA commissioning.
C: – INVESTIGATION
Breakdown calls in April 07 / Calls attended by TPC / Calls attended by NELCO / Calls attended by TPC/NELCO
16 / 9 / 7 / Nil

AT Salsette, 10 Serck RTUs failed when 110KV Salsette-Saki 4 tripped. Modem cards were replaced and System normalised. Remedial actions related to SCADA system grounding is implemented. Further investigation is planned with NELCO’s Experts on Grounding.

D: - MANPOWER DEVELOPMENT /ADMIN:

Ms B S Pisolkar attended a 3 day programme on Practicing Business Excellence (PBE) from 26th April to 28th April 2007 at Voltas Centre Thane.

III.  ET & A COMMUNICATION SECTION.

MONTH & YEAR – April 2007

1. COMMUNICATION AVAILABILITY: -

Communication System Indices / April 07 (%) / April 06 (%) / Achieved for FY 2008 / Target for the FY 2008
Protection Channels / 100 / 100 / 100 / 99.9
Data channels / 100 / 100 / 100 / 98.0
Voice system / 99.73 / 99.18 / 99.73 / 99.0
2. MAJOR INVESTIGATION & OCCURRENCES: -
Date / Division / Station / OCCURRENCES / INVESTIGATION
8 April 07 / Trombay / Carnac Trombay 220 Kv line standby OPGW Fiber was damaged due to heavy fault current at T13 (in Mahul creek). The same was spliced & applications have been restored.
Jobs that had taken more time than the standard time
Date / Division/ Station / System / Channels affected / Down Time
20 April 07 / Trombay / Telephone Exchange connectivity For Vikhroli is intermittently failing. This is due to insufficient Bandwidth available for Vikhroli WAN. The BW will be upgraded by installing new High speed MUX. Between Dharavi &Vikhroli. / 240 hrs
Date / Division / Description / Resolution time
12 April 07 / Dharavi / SCADA connectivity from various nodes ( Borivli , Salsette , Parel ) were not available at CCR Dharavi. Carnac L3 switch was misbehaving which caused flooding of the entire network. After resetting Carnac switch system got normalized. / 8 hrs
7 April 07 / Trombay / WAN connectivity between Coal yard & Trombay LD was intermittently failing. MM patch cord was replaced with SM patch cords as Cable is on SM fibre. / 24 hrs

3.  COMMISSIONING / PROJECT ACTIVITIES : -

Date / Division / Description
15, 21 April 2007 / Trombay / Diversion of OPGW cable at Trombay (near Agesis Chemicals). Trombay-Parel & Trombay-Dharavi Tower line has been diverted on new tower. The OPGW cables were re-routed & spliced after diversion of Tower line.

4.  PREVENTIVE MAINTAINANCE ACTIVITIES. NIL

Date / Station / Link / Description
Nil

5.  Preventive Maintenance Completion Percentage (April 2007 – March 2008.)

System / April 06-March 07 / Till Last Month / Till end of this month
Fibre Optic / 3.23 % / 0 % / 0 %
Microwave / 80 % / 0 % / 0 %
PLCC / 0 % / 0 % / 0 %
Total / 14.8 % / 0 % / 0 %

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

8. MAN POWER DEVELOPMENT:

Nil

( J. D. Shrotri)

AGM(ET&A)

SKP:JDS

Station Wise Diagnostic testing Index 2007 - 2008
Sr. No. / Station / Diagnostic Testing indices
Equipment (%) / Protection (%) / Overall (%)
1 / Ambernath / 0 / 0 / 0
2 / Backbay-Tata / 0 / 0 / 0
3 / Bhira / 0 / 0 / 0
4 / Bhivpuri / 0 / 0 / 0
5 / Borivli / 11 / 6 / 7
6 / Carnac / 3 / 5 / 5
7 / Chembur / 3 / 2 / 2
8 / Chola / 0 / 0 / 0
9 / Dharavi / 0 / 0 / 0
10 / Grant Road / 0 / 0 / 0
11 / Kalyan / 0 / 0 / 0
12 / Khopoli / 0 / 0 / 0
13 / Kundli / 0 / 0 / 0
14 / Kolshet / 0 / 31 / 22
15 / Mahalaxmi / 5 / 3 / 4
16 / Malad / 0 / 0 / 0
17 / Mankhurd / 0 / 0 / 0
18 / Panvel / 0 / 0 / 0
19 / Parel / 2 / 4 / 3
20 / Saki / 9 / 26 / 20
21 / Salsette / 0 / 37 / 29
22 / Trombay-A / 1 / 4 / 3
23 / Trombay-B / 4 / 0 / 1
24 / Versova / 0 / 16 / 13
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 / 4 / 8 / 7