IXIAKA POWER DISTRIBUTION COMPANY LTD.
Lot-l: Design, Manufacture, Supply, Installation, Testing and Commissioning of 7
nos. new
132133 kV GIS Sub-stations at CharSayedpur, Fatulla, Jigatola, Kazla, Motijheel, New Ramna
and PostogolaonTurnkeybasis.
[Invitation for
B
id No. DPDC/PSEEIIP/AFD
'
Date : 06/0 8/20 I 5]
Addendum No.1
Memo No.: DPDC/PSEEIIP/AFD
sl.
I 20 I 5 139,
l2}l5l
166
Date: D5l11 12015.
Amendment
Stated in the Bid Document
Reference
No.
1
Volume-3, Schedule-E
Replace max. Break time "30 ms"
Max. Break time 30 ms
By
KV Gas Insulated
Switchgear, Sl. No. 9
132
oo65
ms".
2
Volume-2, Section-25
Drawings
Char Sayedptr 132133 KV Substation
Insert Single line drawing of Madanganj
l32kY S/S after page-31, Section-25:
Drawings as Annexure-L.
J
Volume-2, Section-25
Drawings
Postogola 132133 KV Substation
4
Volume-3, Schedule-E
Technical Requirement and
Insert Single line drawing of Hasnabad 132
kV S/S after page-l0, Section-25 Drawings
as Annexure-2.
Insert the quoted item at the end of the
mentioned GTP "S1. No. 36: 132 kV straight
through Jointll32 kV plug in type
termination kit for 132 kV 800mm2 Copper
XLPE cable shall be supplied from Pfisterer,
Guarantee Schedule 132 KV Cable
Germany".
5
Volume-2, Section-12
Appendix 12.4.2
Replace the existing "Appendix 12.4.2
Page-24
Communication Network with
Communication Network with services to be
Transmitted"
By new "Appendix 12.A.2 Communication
Network with services to be Transmitted" as
shown in Annexure-3.
services to be Transmitted
6
,7
1.2 System Electrical Parameters
Volume-2, Section-l
Scope of Work
Page-l/15.
1.2.
Volume- 2 of 3,
4.9.2: Oil/SF6 Gas Bushings
1
System Conditions
Delete the clause 004.9.2: OiUSF6 Gas
Bushings".
Section 4
Clause-4.9.2
8
Insert the below quoted line at the end of the
clause 1.2. I "Symmetrical short-circuit
current (3 sec) at I I kV level is 31.5 kA".
Volume-2 of 3,
Section- 12, Clause
Replace para "The battery capacities shall be
48V battery rating:
200 ampere hours atthe l0 hourrate"
12.8.4 e
by
Volume 3 of 3
Appendix A10
"The battery capacity shall be 250AH at the
5 hour rate" in clause 12.8.4 e, Section 12,
Volume-2.
Replace the following words"400 Ah at the
8-hour rate" by
'250 Ah at the 5-hour rate' in page SAlT &
SA22 of Schedule-A, Volume-3
K
tilt)
u
3'9-
I
st.
Stated in the Bid Document
Reference
Amendment
No.
9
Volume- 2 of 3,
5.14.1 Standards
Section- 5, Clauses
The equipment shall conform (for
testing, performance and accuracy) in
all respects the relevant Indian/
International metering standards with
latest amendments thereof unless
otherwise specified
5.74,
page
sl38
10
Delete the word "Indian/"
Insert elevation drawing of GIS building for
bid purpose only at the end ofthe section-25
Elevation Drawing
Section- 25
Drawings
11
(A) Volume- 2 of
Clause
12
3
1.3
Volume-3 of 3,
Schedule-B: Price
Schedules
Schedule No.
The Seismic factor is 0.2g
as shown in Annecxure-4
Replace Seismic factor o'0.29"
by "0.1g".
2. Transformer
Replace quantity "2 set" by "3 set"
Climatic Conditions
2.02331fi kV,28/35MVA
Transformer with Accessories
82 of F.
NEW RAMNA I32
KV GIS,33 KV GIS
& I1 KV AIS
SUBSTATION
13
Volume-3 of 3,
Schedule-E, Technical
Requirement And
Guarantee Schedule
132 KV Gas Insulated
Switchgear
14
7. Gas compartments:
max. Gas losses per gas compartment
and year
Volume-3 of 3,
Insert following new items at the end of the
schedule No. Bl &.82 for each substation of
this bid " A.1x300 sq-mm 33kV Cable with
Schedule-B: Price
Schedules
Termination
A1.33 kV Cable for connecting 33 KV side
of 80/120 MVA Transformer with 33 kV
side of 33/.4 kV Auxiliary Transformer: I
Schedule No.B1&B2
for all 7 nos.
Substation.
15
Lot
A2.33 KV Cable Termination at
Transformer ends: I Lot".
Insert quoted words after the words Testing
Volume-3 of 3,
A.
Schedule-B: Price
KV GIS &
Instrument. "Country of origin:
U SAff ranch/German/UI?Japan/Austria/
Sweeden/Finland"
C. Jigatola 132 KV GIS, 33 KV GIS
& 11 KV AIS Substation
C. Civil and allied works at Jigatola
33111 KV Substation.
Item l. Temporary arrangement of
maintaining 33 KV source to the
existing Transformers including
transfer of protection etc. with the
Insert "Item 1.1 Demolishing the existing
residential building of DPDC (5 storied
building) for 132 KV GIS Building with
basement and other top floors: I Lot" after
Item l.
Schedule,
Schedule No.
16
Replace "As per IEC" by less than *0.1o/o
which shall be verified by Type test reports
from STL member laboratory."
Char Sayedpur 132 KV GIS,33
11 KV AIS Substation
21. b) Testing Instrument
Bl &
B2
Volume-3 of 3,
Schedule-B: Price
Schedule
Schedule No. 84
/r
huU
4r"
,?p\b,)
()
-+--
Reference
SL
Stated in the Bid Document
Amendment
No.
cooperation of DPDC:
t7
I Lot.
Prices payable to the Contractor,
Section-9, Volume-1
of 3, Appendix 2
in
with the Contract,
shall be subject to adjustment
during performance of the
Contract to reflect changes in the
Price Escalation
accordance
Replace the word "during performance of
the contract" by ooafter completion of full
work"
cost of labor and material
components, in accordance with
18
the following formula:
132kY Gas Insulated Switchgear
3. Electrical Data:
Busbar material: Copper
Volume -3 of 3,
Schedule-E,
Technical
Replace the word "Copper"
By
"Copper/Aluminum".
Requirement and
Guarantee Schedule
19
Volume-1 of 3,
This guarantee is subject to the
Section- 6,
Uniform Rules for Demand
Form ofPerfornance
Guarantees, ICC Publication No.
458
security &
Form ofAdvance
security
20
Volume
I
30.Limitation of Liability
of 3,
Section -8
scc 30.1 (b)
2t
22
30.1
(b)
The multiplierof the
Contract Price: Not Applicable
Volume-3 of 3,
12. High Speed Earthing Switch
Schedule-E, l32kV
Gas Insulated
Switchgear
Electrical Data:
Rated current 63
Volume-3 of 3,
Schedule-B: Pricc
Schedules
Schedule No. B 1. 82,
B4
"Not Applicable"
By
"1 (one)".
Replace the following words 'oRated current
63 KA" by
"Rated current/Short circuit
KA
In the event that the Employer fails to
make any payment on its respective
due date, the Employer shall pay to
the Contractor interest on the amount
of such delayed payment at the rate of
J
ZJ
Replace following words
current
20004/40 KA".
Volume-l of 3,
Section-9, Appendix I
- Terms and
Procedures of
Payment
Replace "ICC Publication No. 458"
By "ICC Publication No 758"
Delete the quoted paragraph "In the event
that the Employer fails to make any payment
on its respective due date, the Employer shall
pay to the Contractor interest on the amount
of such delayed payment at the rate of
I
percent (_%) per month for
period of delay until payment has
been made in full
percent (_%) per month for period of delay
until payment has been made in fuII".
Control, Protection,
Insert the following words "Control, Protection,
Substation
Automation & Metering
7.01 132 kV Overhead/Underground
line Circuit
7.02 132 kV
7.03 132 kV
7.04 132 kV
7.05 132 kV
Transfiorner Circuit
Bus Coupler Cilcuit
Spare Bay
Busbar Protection Panel
Substation Automation & metering ofl'at the
beginning of 51. No. 7.01 to 7.06for A. Char
Sayedpur, B. Fatullah, C. Jigatola, E. Motijheel
and F. New Ramnal32 KV GIS, 33 KV GIS &
I
I KV AIS
Substation
Insert the following words "Control, Protection,
Substation Automation & metering
of'
at the
3
/r
Lilb
t-i $9-
st.
Stated in the Bid Document
Reference
Amendment
No.
7.06132 kV Tariff Metering Panel
beginning of Sl. No. 5.01 to 5.06 for D. KAZLA
and
&
G. POSTOGOLA
11
132 KV GIS,33 KV GIS
KV AIS SUBSTATION
Insert new o'item 7.12 Control, Protection,
metering and SAS for 11 KV AIS: 1 Lot" after
item 7.11 for A. CHAR SAYEDPUR, B.
FATULLAH, C. JIGATOLA, E. MOTIJHEEL
and F. NEW RAMNA132 KV GIS,33 KV GIS
&
24
ll
KVAIS SL]BSTATION
Schedule-B: Price
7.0 Control, Protection, Substation
Automation & Metering
Delete Item no. 7.07 & 7.08 from Schedule
Bl, 82 &B3 of Fatullah & New Ramna
Schedules
7.07 132 KV Control Panel for
Substation.
Schedule
OHL Line at Madanganj S/S.
7.08 132 KV Relay Panel for O/H
Volume-3 of 3,
No.B1,B2,B4
Item no. 7.07 to 7 .08
for Fatullah & New
Line at Madanganj S/S.
Ramna Substation.
25
Volume-2 of 3,
Substation Automation System
Section-S Substation
Architecture
end of the section-5: Substation
Automation as shown in Annexure-S.
Automation
26
Volume-3 of
3
Schedule- A,
Appendix 43,
132133
Insert the 132 kV SAS architecture and
33 kV &1 I kV SAS architecture at the
kV Power
Bushing insulators or cable boxes
on line and neutral terminals:
1) HV Line :GIB termination
(Oil/Gas Bushing)
Replace the following words "GIB
termination" by "Oil/Air Bushings"
Transformer
27
Volume-2 of 3,
Section-5, Page-5/38
5.15132 KV Metering Panel
Specification for Class 0.2s Static
Trivector Energy Meters
5.15.1 Application
b. The meter shall be complied with
Indian Companion Standard (ICS)
of Category B for DLMS
specification.
28
Volume-2 of
29
Volume-3 of 3,
E.
Schedule-B: Price
GIS
3
Motijheel 132 KV GIS, 33 KV
11 KV AIS Substation
&
Schedules
Schedule No.
84
*
w ) 4-9-
para "b. The meter shall be
complied with Indian Companion Standard
(ICS) of Category B for DLMS
specification"
by
o'b.
The Country of origin of 132 kV energy
Replace the
meter shall be
USA/France/GermanyAJK/Switzerland/
Sweden/Austria/Finland/Japan. The meter
shall be complied with relevant latest IEC".
Insert new "Section -26: Nitrogen injection
& fire protection (NIFPS) system" after the
section-25 as shown in Annexure-9
Add item "16. Nitrogen Injection & fire
protection (NIFPS) system for 132133 kY
Transformer &33111 kV Transformer: I
Lot".
4
r7
sl.
Stated in the Bid Document
Reference
Amendment
No.
30
Volume-l of
3
2.7 Subcontractors
Section-3, Evaluation 2.132 kV GIS Substation Erection :
and Qualification Experience ofat least 03 (three) 132
Criteria
kV Bay Construction within last 07
Replace "03" by '001",
Replace "05" by'003" and
Replace"O5" by "03".
years.
3. Civil Subcontractor: They shall
have experience in construction of at
least 05 nos. of new l32l33kV
801120 MVA or higher
v oltageI c ap ac ity S ub station.
4. Electrical Installation works Subcontractor: The subcontractor shall
have experience for installation of at
least 05 nos. of new l32l33kY
3
MVA orhigher
itv sub stati ons.
Section 25: Drawing
3
2.4.1 G eneral Experience
801120
3l
v oltaeeI caoac
Volume-2 of
Section-25: Drawing.
32
Volume-l of
Replace existing "2.4.I General Experience"
Section-3, Evaluatiori
and
Insert "SLD for protection of 132 kV and 33
kV bay" at the end of Section25: Drawing as
shown in Annexure-6.
by Annexure.T.
Qualification
Criteria
32
Volume-l of
3
Section-3, Evaluation
and
33
Qualification
Criteria
Volume- 3 of 3,
Schedule-
2-4.2
SpecificExperience
(a) Contracts of Similar
Size and
Size and Nature"
By Annexure-8.
Nature
Drawings and Documents to be
I
Replace existing"2.4.2 Specific Experience
(a) Contracts of Similar
submitted with Tender
Insert the below quoted paft at the end of
the item no, 9 6.VIII) Type test report for
Battery, BatlerS Charger and Auxiliary
transformerd'trer IEC shall have to be
submitted
34
Sl. No. 5: Tap Changer (HV side)
Volume-3 of 3,
Schedule-E, 132133
80/120
3
Phase Power
MVA,
kv
?om any
independent
laboratory".
Insert a new item quoted below after sl.
No.5 "Sl. No. 5.1 RTCC panel with
TAPCON voltage regulator, MR Germany"
Transformer
35
Volume -3 of 3,
Schedule- I,
Type test reports ol 132 kV,20004 & 33
kV, 20004 GIS breaker including CT,
P'1. Disconnector, 132 kV 1250,4. Air
Insulated Switchgear including C'I', CVT,
Disconneotor, 132 &.33 kV Surge
Arrester, 132 kV 1x800 mm'?XLPE Cu
Cable, 33 kV 1x800 mm'zXLPE Cu
Cable and 11 KV 1x500 mm'zXLPE, Cu
Cables, 132 kV & 33 kV Plug in CIS End
Termination, 132 kV,33 kV
& I I kV
Indoor/outdoor Cable Accessories and 1 1
kV 2500A Air Insulated Srvitchgear shall
be submitted fiom any Testing
Laboratory which is mcmber of STL.
othenvise the bid rvill be rejected.
Insert the below quoted paragraph after the last
line
"The type test repofts of higher capacity and/or
higher voltage class for above mentioned
equipment and cable shall also be acceptable for
evaluation purpose only. However the
prospective bidders shall have to confirm with a
commitment letter with the technical proposal to
conduct complete type test excluding destructive
test as per latest version ofIEC standard from
any Testing Laboratory which is amember of
STL, on offered type equipment and cable which
will be selected by DPDC nominated engineers at
random prior to PSI, if any. All costs related to
these tests shall be borne by the contractor",
5
K
W U ;"9-
sl.
Stated in the Bid Document
Reference
Amendment
No.
36
Volume 3 of 3,
9. (D
Schedule I,
Drawings and
Documents to be
submitted with Tender
80/120
(iD
Test Report on 132133 kV,
MYA Power Transformer
Test Report on 33/11 kV,
28/35
MVA Power Transformer
TYPE TESTS
a) Temperature Rise Test
Delete quoted item from existing Type Tests of
item 9. (i), & (ii) "c) Noise level Test
d) Vacuum Test".
lnsert the quoted item at the end of Routine
Tests of item 9. (D, & (ii) "j) Noise level Test f,l
Vacuum Test".
b) Lightning Impulse Test
c) Noise level Test
d) Vacuum Test
ROUTINE TESTS
a) Measurement of insulation resistance.
b) Measurement of Voltage ratio test.
c) Measurement of winding resistance at
Each Tap position.
d) Vector group test.
e)
Measurement
of
current.
0
Measurement
no-load loss &
of short circuit
impedance and load loss.
g) Induced over voltage test
h)
5l
Volume-3 of 3,
Schedule-B: Price
Schedules
Schedule No.
Power frequency (Separate
source
voltage) withstands test.
i) Transformer oil test.
33 KV Circuits:
Control, Protection, metering and SAS
Insert the quantity
"l
Lot" for all
7 nos.
Substations.
for 33 KV GIS.
Bl, B2,
B4
38
39
Volurne-3 of 3,
E.
Schedule-B: Price
Schedules
Schedule No. 84 Installation and Other
Services
GIS & 1I KVAIS SUBSTATION
3. Civil Works, Control Building and
Page 92
control building:
MOTIJHEEL 132 KV GIS,33 KV
by
"xiv) Complete civil works for six storied control
Foundation
& office building
xiv) Complete civil works for six storied
I Lot
Volume-3 o1 3,
Manufacturer's Name
Schedule-E
Alstom (France/UK), ABB
TECHNICAL
REQUIREMENT AND
GUARANTEE
(Switzerland/Sweden), GE (Canada) and
Siemens (Germany)
SCHEDULE,
(Each floor area from First
floor to fifth floor is 933 Sqm, gnd floor area is
753 Sqm and basement for cable is 264 Sqm.
These areas are approximate areas) : I Lot"
Replace the quoted item "Alstom (France/UK).
ABB (Switzerland/Su,eden), GE (Canada) and
Siemens (Germany)"
by
"Alstom (France/UK).
ABB, (Si.vitzerland/Sr.veden), GE (Canada),
Siemens (Gelmany) and Schneider Electric
l32KVPROTECTION,
(France/UK)"
Iten.r 1.1, 1.2, 1.3.1.4.
1.5. 1.6.
Replace the quoted item "xiv) Complete civil
works for six storied control building: 1 Lot"
1.7,1.8&t.9
and
33 KV PROTECTION
Sl. No. 1.7,23&33
Page 6-52 to 6-59
40
Volume-3 of 3,
Schedule-E
TECHNICAL
REQUIREMENT AND
GI]ARANTEE
SCHEDULE
SUBSTATION AUTOMATION
SYSTEM
Must be from Alstom (France/UK),
ABB (Switzerland/Sweden), GE
(Canada) and
Siemens (Germany)
Replace the quoted item "Must be from Alstom
(France/UK). ABB (Srvitzerland/Srveden). GE,
(Canada) and Siemens (Germany)
by
"Must be fiom Alstom (France/UK)" ABB
(Sr.vitzerland/Srveden), GE (Canada) and
Siemens (Germany) and Schneider Electric
Page 6-60
(Flance/UI()".
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7
Annexure-1
Single line drawing of Madanganj 132133 kV S/S
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7
7
Annexure-3
Appendix 12.A.2
COMMI.INICATION NETWORK WITH SERVICES TO BE TRANSMITTED
Scope of this Bid
Equipment Al
(Duplicate CPU/PSU):
Existing source
Substation
12 x2 wire subscriber (FXS)
4x Differential protection
4x Distance Protection (G. 703)
4x101100 Base T for Ethernet
switch
;B_-
13
Annexure-4
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Annexure-5
132
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Annexure-9
section 26: Nitrogen Injection & fire protection system (NIFps)
hry
27
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lr{J)
SECTION-26
4.16
FIRE PROTECTION SYSTEM
4.16.1 General
This Sub-clause covers the design and performance requirements of: Nitrogen Gas lnjection Fire Fighting
for the transformer l32l33kY, 50/75MVA, ONAN/ONAF
230 I 138 t3 4.5ky,225 t300NN4, ONAN/ONAF.
It is not intended to completely speciff all details of
design and construction. Neverttreless, the system
design and equipment shall conform in all respects to highstandard of engineering, design and
workmanship and shall be capable of performing incontinuous commercial operation in a manner
acceptable to the Employer. The system design shall also conform to TAC/ NFPA 70 norms.
The system offered shall comply with the relevant intemational Standards, conforming toany other
approved intemational standards shall meet the requirements called for in thelatest revision of relevant
international Standard.
Ambient temperature for design of all equipment shall be considered as 450c.
The system shall be reliable without making any mal operation. Even
if undesirablenitrogen
gas injection
is made into the transformer tank under normal transformercondition without the intemal faults,
restoration of transformer by vacuum oil purificationup to re-energizing shall complete as soon as
possible after the undesired gas injection.
ln case of an event of the control power failure, the system shall be able to be operatedmanually.
Various equipment to perform the required fire protection shall be provided under thisContract.
Reference of standards is listed below. Relevant lntemational Standards other than BSstandards shall be
subject to approval by the Employer:
BS Standards
C
857629-l
BS 381
Colours for ldentification, Coding & Special purpose
Specification for 300/500 V fire resistant electric cables having low emissionof smoke
and corrosive gases when affected by fire.
8434-1
BS 5839-1
BS
Methods of test for assessment for power integrity of electric cables
Code of practice system design, installation, commissioning andmaintenance for fire
detection and fire alarm system for Buildings.
BS EN50267-2-1
Common Test Methods for Cables Under Fire Conditions
4.16.2 Nitrogen Fire Fighting
(1) Nitrogen Fire Fighting
The 230l138kv/33kv transformers shall be provided with Nitrogen lnjection Fire Protection System
(NIFPS). The detail description of fire protection system is givenbelow. Accordingly the Contractor has
U
e9-.
28
to make necessary provisiorrs in consultationwith supplier of NIFPS for satisfactory operation without
affecti ng the overal lperformance of transformer.
Oil filled transformer / reactor shall be provided with a dedicated Nitrogen lnjection Fire
Protection
System (NIFPS) for the ratings, mentioned in SLD which shall use nitrogenas fire quenching medium.
The fire protective system shall preventtransformer/Reactor oil tank explosion and possible fire in case
internal faults. ln the event
of fire by
of
external causes such as bushing fire, OLTC fires, fire from
surrounding equipment etc, it shall act as a fast and effective fire fighter. lt shall accomplish its roleas fire
preventer and extinguisher without ernploying water and
/ or carbon dioxide. Fireshall be extinguished
within 3 minutes (maximum) of system activation and within 3Oseconds (maximum) of commencement
ofnitrogen injection. The fire protectionsystem shall have been in successful operation in for at least last
three years forprotection
pastsupplies
of transformers of
2301138133
kV
and higher voltage class. The list of
in local market along with at least l0 similar tropical country successfuloperational
performance certificates from users of the system shall be submitted forapproval.
(2) Activation of the fire protective system
Mal-functioning of fire preventioni extinguishing system could lead to interrLrption inpower supply. The
bidder shall ensr:re that the probability of chances of malfunctioning of the fire protective system is
practically zero. To achieve this objective, the biddershall plan out his scheme of activating signals which
should not be too complicated tomake the fire protective system inoperative in case of actual need. The
system shall beprovided with automatic control for fire prevention and fire extinction. Besidesautomatic
control, remote electrical push button control at Control box and localmanual control in the fire
extinguishing cubicle shall also be provided. The followingelectrical-signals shall be required for
activating the fire protective system underprevention mode / fire extingr-iishing mode.
(3) Auto Mode
(a) For prevention
offire:
Differential relay operation
Buchholz relay paralleled with pressure relief valve or RPRR (RapidPressure Rise Relay)
Tripping of all circuit breakers (on HV &LV/IV side) associated with transformer /reactor is the prerequisite for activation ofsystem
(b) For extinguishing fire
Fire detector
Buchholz relay paralleled with pressure relief valve or RPRR (Rapid Pressure Rise Relay)
29
tq
- Tripping of all circuit breakers (on HV &LV/N side) associated with transformer lreactor is the prerequisite for activation of system.
(4) Manual Mode (Local/ Remote)
Tripping of all circuit breakers (on HV &LV TY side) associated with transformer lreactor is the prerequisite for activation ofsystem
(5) Manual Mode (Mechanical)
The system shall be designed to be operated manually in case of failure of powersupply to fire protection
system.
(6) Description
Nitrogen injection fire protection system should be a dedicated system for each oilimmersed transformer
lreactor.lt should have a Fire Extinguishing Cubicle (FEC)placed on a plinth at a distance of 5-10 m
away from transformer / reactor or placednext to the fire wall (if fire fighting wall exists). The FEC shall
be connected to the topof transformer/reactor oil tank for depressurization of tank and to the oil pit
(capacity isapproximately equal to l0o/o of total volume of oil in transformer/reactor tank) from itsbottom
through oil pipes. The fire extinguishing cubicle should house a pressurizednitrogen cylinder(s) which is
connected to the transformer oil tank at bottom. TheTransformer Conservator lsolation Valve (TCIV) is
fitted between the conservator tankand Buchholz relay. Cable connections are to be provided from signal
box to thecontrol box in the control room, from control box to fire extinguishing cubicle and fromTCIV
to signal box. Fire detectors placed on the top of transformer/reactor tank are tobe connected in parallel to
the signal box by Fire survival cables. Control box is also tobe connected to relay panel in control room
for receiving system activation signals.
(7) Operation
On receipt of all activating signals, the system shall drain pre-determined volume oflrot oil from the top
of tank (i.e. top oil layer), through outlet valve, to
reduce tankpressure
simultaneously injecting nitrogen gas at highpressure
for stirring the oil at pre-fixed rate and
by removing top oil
and
thus
bringing the temperature of topoil layer down. Transformer conservator isolation valve blocks the flow
oil fromconservator tank in
case
of
of tank rupture / explosion or bushing bursting. Nitrogenoccupies the
oil drained out and acts as an insulating layer over oilin the tank and thus preventing
aggravation offire.
space created by
Crn
rt
-is
d30
7
(8) System components
Nitrogen injection fire protection system shall broadly consist of the followingcomponents. However. all
other components which are necessary for fast reliable andeffective working of the fire protective system
sha1l deemed to be included in thescope
of supply.
(a) Fire Extinguishing Cubicle (FEC)
The FEC shall be made of CRCA sheet of 3 mm (minimum) thick complete with the baseframe, painted
inside and outside with post office red colour (shade to be
ldentification, Coding and Special Purposes).
lt
in line with BS:381 C:
1988
- Colors for
shall havehugged split doors fitted with high quality
tamper proof lock. The degree of protectionshallbe IP55. The following items shall be provided in the
FEC.
Nitrogen gas cylinder with regulator and falling pressure electrical contact manometer.
Oil drain pipe with mechanical quick drain valve.
Electro mechanical control equipment for draining of oil of pre-determined volume andinjecting
regulated volume of nitrogen gas
Pressure monitoring switch for back-up protection for nitrogen release
Limit switches for monitoring of the system
Butterfly valve with flanges on the top of panel for connecting oil drain pipe andnitrogen injection
pipes for transformer/reactors
Panel lighting (CFL Type)
Oil drain pipe extension of suitable sizes for connecting pipes to oil pit.
Space heater
Others if necessary
(b) Control box
Control box is to be placed in the control room for monitoring system operation, automatic control and
remote operation. The following alarms, indications, switches, pushbuttons, audio signal etc. shall be
provided.
- System on
- TCIV open
- Oildrain valve closed
- Gas inlet valve closed
- TCIV closed*
- Fire detector trip *
- Buchholz relay trip
- Oil drain valve open+
-
Extinction in progress*
- Cylinder pressure low *
.,aE
t
- Differential relay trip
31
K
- PRV / RPRR trip
- Transformer/reactor trip
- System out ofservice *
- Fault in cable connecting fault fire detector
- Fault in cable connecting differential relay
- Fault in cable connecting Buchholz relay
- Fault in cable connecting PRV / RPRR
- Fault in cable connecting transformer /reactor trip
- Fault in cable connecting TCIV
- Auto/ Manual/
Off
- Extinction release on /
off
- Lamp test
-
Visual/ Audio alarm*
- Visual/ Audio alarm for DC supply fail *
- Space heater
- Others if necessary
* Suitable provision shall
be made in the control box, for monitoring of the systemfrom remote
substation using the substation automation system.
(c) Transformer Conservator Isolation Valve
Transformer conservator isolation valve (TCIV)
to be fitted in the
conservator pipe line, betrveen
conservator and buchholz relay which shall operate for isolating the conservatorduring abnormal flow
oil due to rupture / explosion of tank or bursting of bushing. The valve shall not isolate
of
conseryator
during normal flow of oil during filtration or filling orrefilling, locking plates to be provided with handle
for pad locking. lt shall have proximity switch for remote alarm, indication with visual position indicator.
(d) Fire Detectors
Tlre system shall be complete with adequate number of fire detectors (quartz bulb) fittedon the top cover
of the transformer / reactor oil tank.
(e) SignalBox
It
shall be mounted away from transformer
I
reactor main tank, preferably near thetransformer
marshalling box, for terminating cable connections from TCIV & firedetectors and for further connection
to the control box. The degree ofprotection shall be IP55.
,{n
4,rg_-_
32
(f) Cables
Fire survival cables (capable to withstand 750" C.) of 4 core
x
1.5 sq. mm size forconnection of fire
detectors in parallel shall be used. The fire survival cable shall conformto BS7629-1, BS 8434-l and BS
5839-1, BS EN 5026'7-2-1or relevant international standards.
Fire Retardant LowSmoke (FRLS) cable
signal box
/
of
l2core
x
1.5 sq. mm size shall be used forconnection
of
marshalling box near transformer/reactor and FEC mountednear transformer/reactor with
control box mounted in control room.
Fire Retardant LowSmoke (FRLS) cable of 4 core
x
1.5 sq. mm size shall be used forconnection between
control box to DC and AC supply source, fire extinguishing cubicle to
AC supply source, signal box/ marshalling box to transformer conservator isolation valveconnection on
transformer/reactor.
(g) Pipes
Pipes complete with connections, flanges, bends and tees etc. shall be supplied alongwith the system.
(9) Other items
(a) Oil drain and nitrogen injection openings with gate valves on transforrner / reactor tank at suitable
locations.
(b) Flanges with dumrny piece in conservator pipe between Buchholz relay and conseruatortank for
fixing TCIV.
(c)
Fire detector brackets on transformer / reactor tank top cover.
(d)
Spare potential free contacts for activating the system i.e. in differential relay, Buchholzrelay,
Pressure Relief Device / RPRR,
circuit Breaker of transformer/reactor
(e) Pipe connections between transformer / reactor and FEC and between FEC and oil pitrequired for
collecting top oil.
(0
Cabling for fire detectors mounted on transformer /reactor top cover
(g) lnter cabling between signal box, control box and Fire Extinguishing Cubicle (FEC)"
(h) Butterfly valves /Gate valves on oil drain pipe and nitrogen injection pipe which shouldbe
able to
withstand fullvacuum.
(i)
(1
Supports, signal box etc. which are to be painted with enameled paint.
0) Technical Particulars
Fire extinction period from commencement of nitrogen injection : 30 s. (max.)
Total duration from activation of fire protection system to complete
cooling
ny
: 30 minutes (Max.)
33
-\-
temperature
Heat sensing area per detector
Transformer Conservator isolation valve setting
Fire detector's heat sensing
: 14loC
:
Up to a radius of 900 mrr
: 60
liter/ min (minimum)mm
Capacity of nitrogen cylinder hold10 m3 (minimum) gas at pressure
:
of
150 kg/cm2
68 liter (maximum) watercapacity and sha1l
Power Supply
For control
box
: 110 V DC
For fire extinguishing cubicle for
lighting
:
240 V AC
(11) Mandatory Spare Parts
Cylinder filled with Nitroger-r of required capacity per
Substation
Fire detectors per transformer
Regulator assembly per
:
1
No.
: 3 Nos.
substation
: 1 No.
(12) Tests
Reports
of all test conducted at independent laboratories as per specification in respect of
thesystem
including test repofts for degree of protection for FEC shall be submitted for approval.
The manufacturer shall have Live Fire Demo Facility and shall have TCIV testing facility attheir works.
The supplier shall demonstrate the functionaltest associated with the following:
- Fire Extinguishing Cubicle, Control Box.
- Fire Detector.
- Transformer Conservator lsolation Valve
The performance test
of the complete
system shall be carried out after erection
transformer at site. Detailed layout drawings, equipment drawing along with
4
of the systemwith
sets ofOperation and
maintenance manual along with soft copies (in CDs) shall be submitted by theContractor along with the
consigrrment.
,1.16.3 Fire
Wall
The fire wall having suitable height shall be installed between transformers to prevent thehealth
transformer from the spread fire. The wall shall be constructed by the reinforcedconcrete.
()^
r-
o,/tr)
34
DHAKA POWER DISTRIBUTION COMPANY LTD.
Lot-l: Design, Manufacture, Supply,Installation, Testing and Commissioning of 7 nos.
132133
new
kV GIS Sub-stations at Char Sayedpur, Fatulla, Jigatola, Kazla, Motijheel, New Ramna
and Postogolaon Turnkey basis.
[Invitation for
B
id No. DPDC/PSEEIIP/AFD
I 20 I 5 I
39, Date : 06/0 8i20 I 5]
Clarification No.1
Memo No.: DPDC/PSEEIIP/AFD|}}L11
sl.
166
Date:Oilll12015.
Section/Clause
Queries of Prospective Bidders
Schedule'E
Technical
Requirement and
Guarantee Schedule to
be filled up by the
132kV Gas Insulated Switchgear:
Employers Requirements of max. Break time for
circuit breaker of GIS is 30ms. Please replace 30ms
by 65ms
The Break time is not specifically stipulated in IEC
standard for circuit breaker. (refer to IEC 62271-100:
High voltage AC switchgears and circuit breakers)
Reply of DPDC
No.
1
Bidder
.,
3
4
Drawing
Drawing
Please provide single line diagram and layout
Please refer to
drawings for Madanganj l32kv S/S
Addendum no.1, Sl. No.2
Please provide single line diagram and layout
Please refer to
drawings for Hasnabad 132kV S/S
Addendum no.l,
We have just find the drawing l
Drawing
Please refer to
Addendum no.1, Sl.No.1.
lkV
switchgear
of
New Ramma substation but other substations do not
have the drawings for l lkV switchgear in Employers
S1.
No.3
The drawing of New
Ramna Substation is given
as an indicative drawing
which can be consider for
all other proposed
Requirements
substations as a biddir-rg
purpose only. You are
requested to follow the
GTP and price schedule.
5
Schedule
Bl
Page # Schedule B-99
1lkV Switchgear with relay & control panel:
In Schedule 81, page # schedule B -99,there are
Provided drawing is
3
Incoming panels for New Ramma substation but
according to drawing, there are 2 panels. Jigatola
substation also is similar. So will we make quotation
base on your BM or drawing? Which one is more
exactly?
ilt\ D {rg__
indicative drawing for
bidding purpose only. You
are requested to follow the
GTP and price schedule.