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About Us:

  1. This organization deals with maintenance of Traction Power Supply installations, Over Head Equipment, Supervisory Control And Data Acquisition systems etc.
  2. The electrification process started in between Vijayawada to Balarshah from July 1987 and was completed in June 1989. The second section to be energized was Kazipet to Sanatnagar which commenced in December 1991 and concluded in December 1993. The The third stage of electrification was taken up between Dornakal-Karepalli –Singareni (Ellandu)in 1996. Fourth stage of electrification was between Sanatnagar to Lingampalli to facilitate the MMTS services to Lingampalli, during 2003. The section Karepalli-Bhadrachalam Road- Manuguru was electrified in 2008. The electrification between Lingampalli and Wadi was completed in the year 2013. The number of route kilometers electrified in the division has reached 2601 track kilometers, contributing significantly to movement of freight and passenger traffic.

Organisation:

  • The Organisation is headed by Sr.DEE , and assisted by sub-divisional Officers at Dornakal, Kazipet, Sirpurkhagaznagar, Secunderabad and Tandur. The division consists of 17 Over Head Maintenance(OHE) depots and 18 Power System Installations(PSI) depots/ sub-stations. The OHE depots carry-out preventive maintenance of the traction installations i.e. the wires over the track from which the Locomotive pantograph draws the current. The PSI depots maintain the Railway traction sub-stations which feed the OHE with 25KV A.C. Power.
  • The PSI and OHE activities are monitored by the Traction Power Controller (TPC), who monitors the voltages of the system and advises the Section Traffic Controller to regulate trains when there is bunching of trains leading to low voltage and stalling of trains.
  • The equipment at traction sub-stations and switching stations is controlled remotely by TPC. The monitoring of the Remote control equipment is also being.

We Perform:

  • The activities of this department are maintenance of Traction power supply installations, Over head equipment, SCADA, construction activities pertaining to the section, and monitoring of energy conservation in electric traction.
  • The Power to OHE required for hauling of electric locos is fed from the 18 Traction sub-stations maintained by Railways, with fool proof protective equipment. A 100% standby Power supply arrangement is designed for feeding un-interrupted power to traction. Railways takes supply from Supply authorities i.e. MSEB/APTRANSCO/TSTRANSCO/GESCOM at 220/132/110kV for more reliability. The 220/132/110 kV is stepped down to 25kV and fed to the Locos via the overhead equipment.

The Population of important Power supply installation are furnished under:


No. of Traction Sub-stations

No. of Power Transformers

No. of 132kV CB’s

No. of 25kV CB’s

No. of 25kV BM’s

No. of 132kV CT’s

No. of 25kV CT’s

No. of 25kV PT’s

No. of kV LA’s

No. of AT’s

No. of Isolators

18

35

35

109

309

70

170

255

400

546

475

The energy consumption of the division has increased in the manner shown:

Year

Energy Consumption (Million Units)

2006-07

458.7

2007-08

498.4

2008-09

530.5

2009-10

562.6

2010-11

592.8

2011-12

649.1

2012-13

676.2

2013-14

683.2

2014-15

709.8

2015-16

669.07

2016-17

585.27

2017-18 (Upto Sept 17)

337.06

*The Over Head Equipment is built on state of art technology, and designed to cater to Loco speeds of 160kmph.

·POWER PURCHASE FROM ALTERNATIVE SOURCES, THROUGH OPEN ACCESS:

Availing of cheaper power from Ratnagiri Gas and Power Private Limited (RGPPL) at Wirur/TSS

From November 26th 2015, power to WIRR/TSS is being supplied from RGPPL.

Purchase of power through Open access, for supply to other Traction sub-stations fed by GESCOM, APTRANSCO and TSTRANSCO is also being pursued.

Innovations / Improvements:

  • Computerized Current collection and Stagger Checking equipment (Oliver ‘G’) with GPS mapping is being used for detecting sparking in OHE which removes any scope of errors which was prevailing in the earlier conventional method.

  • Thermal images of the jumper connections are taken for monitoring the conditions of the connections, since it is not always practically possible to check the same physically under power block conditions.

  • Isolation of fault in sidings without effecting the main line traffic is ensured by providing CB/BM at SNF/TSS (to isolate AMQ by-pass Line), KZJ/TSS (to isolate ELS/KZJ & KZJ Yard), MTMI/SSP (to isolate JPTN-MACU section), RRPM/SSP (to isolate Zuvari Cements and Jaypee Balaji Cement sidings), DKJ/TSS (to isolate DKJ-KRA section), CHZ/SSP (to isolate FCI siding at CHZ), NPL/SSP (to isolate SAIL, RINL, CONCOR sidings), GDCR/SSP (to isolate Manikgarh Cement siding).

  • Levelers have been erected at all coal loading points to prevent heaping of coal in the wagons which was causing breakdown of OHE.

·Replacement of Aluminium Catenary with Copper catenary wire

2010-11

2011-12

2012-13

2013-14

2014-15

2015-16

2016-17

2017-18 (Upto Sept 17)

Total -659.9TKM

28.142

19.532

62.03

59.764

90.21

143.98

58.517

15.90

Balance – 235.24 TKM

·Measeres taken to reduce CB trippings

Provision of Anti-monkey climbing devices

Majority of the CB trippings in Secunderabad division are due to the monkey menace. During the current year the modified arrangement is done at DKJ yard and found to be effective. Further, the new design will be followed at other places to contain the monkey menace.


  Existing design



Modified design

Insulating the stay and bracket tubes:

Long Register arm chairs have been modified by insulating the stay and bracket tubes, thereby reducing the possibility of monkeys or birds shorting the bracket tube with the RT chair. This arrangement is achieved by providing a 9-tonne insulator between catenary suspension clamp and catenary wire.


Reducing of ‘H’ value and encumbrance of cantilever:

At one location in BKL depot jurisdiction ‘H’ value/encumbrance has been reduced to improve clearance from 75 cms to 150cms, which will significantly reduce the CB tripping chances due to bird nests or monkeys coming into contact with bracket tube of cantilever.


·Bifurcation of Communication channels to avoid delay in SCADAresponse time /Speeding up of SCADA

Bifurcation of SCADA Communication Channels

Earlier

Present

Channels

No. of RTU's

Channels

No. of RTU's

KZJ-KI

24

BPQ/SP - RECH/SSP

9

KZJ-BPQ

22

BPA/TSS - KZJ/TSS

10

KZJ/SSP - PGP/SSP

11

KMT/SP - KI/TSS - JPTN/SSP

17

Speeding up of SCADA

Earlier

Present

Baud Rate

600 Bauds

1200 Bauds

Increase of Baud rate in KZJ-WD section, by upgradation of CPU software to 1200 Baud rate by M/s Synergy Systems. Modem setting of RTU's and front end processor increased to 1200 Baud rate. ( For other sections, CMC/RTU's of old version are not compatible).

Because of bifurcation of the channels and improvement in baud rate,response time of SCADAhas

improvedand TPC can carry out feed extension / fault isolation in less time.

·Revised relay settings at all Traction sub-stations to avoid damage to OHE during monkey

Electrocution / faults

Consequent to snapping of Aluminium catenary wire at WP on 9.8.15, and bracket insulator breakage at metal cap in DKJ-GUU section on 18.8.15 due to monkey menace, over current relay settings are revised as advised by CEE/SCR. The over current settings are revised to avoid chances of fault current passing for more time, so that OHE snapping/ damage does not take place. The revisedsettings are as follows:

Instantaneous OCR

Definite Time OCR

Old setting

New setting

Old setting

New setting

200% i.e. 1600A

160% i.e. 1200A

1350A for 200m sec

1050A for 120m sec

Delta-I

TSS

Old Settings

New Settings

Delta-I

X-Blinder

Delta-I

X-Blinder

NKD & BKL

400A

12-18Ω

210A*

50Ω

Other TSS's

400A

12-18Ω

300A

50Ω

* NKD and BKL TSS's are provided with PTFE Neutral sections and hence Delta-I settings

could be reduced.

High lights for the current month


02 Nos LED based Miner's Cap lamp of 1800 LUX have been facilitated to depots to provide focussed light during work, to avoid the need for holding light by OHE gang staff, there by complying with CEE/SC's inspection note of KZJ depot on 29-03-2013.
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Source : South Central Railway CMS Team Last Reviewed on: 11-10-2017  


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