Download Tender Document Corrigendum - Western Railway ...
Download Tender Document Corrigendum - Western Railway ...
Download Tender Document Corrigendum - Western Railway ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Subject : Pre-bid clarification on queries received from Industry Participants of TPWS: Date-30.06.2011<br />
TENDER NO. WR/S&T/HQ/2010-11/05 Virar (at Km 60)-Vadodara (at Km 397) section<br />
Sr. No.<br />
18<br />
Cl. No.<br />
Technical<br />
Firm<br />
Thales<br />
T<br />
y<br />
p<br />
TTPWS shall be suitable for all types of EMUs,<br />
specification of<br />
-MEMUs, DMUs, electric and diesel locomotives,<br />
Train<br />
RDistributed Power wireless control of locomotive<br />
Protection and<br />
D(Locator), including all types of microprocessor<br />
Warning<br />
Sbased locomotives, running on Indian <strong>Railway</strong>s.<br />
(TPWS)<br />
O<br />
System 4.6<br />
19 Technical<br />
specification of<br />
Train<br />
Protection and<br />
Warning<br />
(TPWS)<br />
System 5.3<br />
Thales<br />
Original Text Clarification needed Clarification of <strong>Western</strong> <strong>Railway</strong><br />
TCalculation of Speed: The system shall incorporate<br />
-the necessary hardware and software module for<br />
Raccurate calculation of the train speed duly<br />
Daccounting for wheel slip/skid corrections.<br />
SManufacturer shall submit the details of the speed<br />
O calculation module along with the supporting<br />
Tinternational standards/practices being followed<br />
-world over for the same. Calculation of speed shall<br />
Wbe with an accuracy of ±2% subject to maximum of<br />
E±2 kmph. Further, the variation in wheel diameter<br />
due to normal wear during time period between two<br />
loco maintenance schedules shall not affect<br />
accuracy beyond the limits specified in this clause.<br />
Even if the OnBoard System is suitable for<br />
all types of trains, loco engineering for every<br />
single train type is necessary and has to be<br />
done.<br />
What is the actual state of technology in<br />
India<br />
Which technology is used for speed<br />
measurement.<br />
Is the accuracy of 2% also applicable for<br />
speeds below 100 km/h<br />
How much is wear of the wheel diameter<br />
between the maintenance period Please<br />
clarify.<br />
This is condition is as per Para 4.6 of<br />
RDSO/SPN/183/2011 Ver.2 and is<br />
self explanatory and should be read<br />
in totality.<br />
This is condition is as per Para 5.3 of<br />
RDSO/SPN/183/2011 Ver.2 and is<br />
self explanatory and should be read<br />
in totality. However, Contactor may<br />
do site survey and interact with<br />
RDSO.<br />
20 Technical<br />
specification of<br />
Train<br />
Protection and<br />
Warning<br />
(TPWS)<br />
System 8.5<br />
Thales<br />
TThe design of on board & track side systems shall<br />
-take into account switching transients that may<br />
Roccur, in either the system or out side, of any<br />
Dmagnitude, up to and including interruption due to<br />
Sshort circuit of 25 KV system. The design shall also<br />
Otake into account supply related surge & transient.<br />
There is no possibility to make a compliance<br />
statement to unlimited transients!<br />
The system should be compliant to<br />
latest UNISIG/RDSO specifications<br />
and compatible for 25 KV, 50hz AC<br />
electric traction.<br />
Pre Bid Queries for TPWS 7
Change language