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Prebid queries - Electrical Package

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Project Name: Construction of New Buildings for IIT Madras
Research Park – Phase – II,
SH: -Electrical works – Package-1 – Substation works
Sl no
CLAUSE REFERENCE
Preamble to Bill of Quantities
PRE-BID QUERIES
BIDDER'S QUERY
Clients Reply
We understood that the additional quantities (if required as
per site condition) of any item will be payable at the rates we
quoted. Rate revision is not applicable for additional
As per tender
quantities.
Pl. clarify our understanding is correct.
1
Sl.No.:2 - Quantities given are tentative and any
changes will not allow the contractor to claim
extra on the rate quoted.
3
Drg No. : IIT-A-182
You have shown one Solar Power Sync. Panel at Block-E
GF. But it is not reflected in BOM. Kindly confirm wether it is It is not required. It is done by other agency.
required or not.
6
S.NO - E.1 & B - 33Kv & 11Kv HT Panels
Please confirm whether we can consider Megawin Make 33
& 11 kV HT Pnels
Megawin panel approved , VCB follow as per approved make
7
S.NO - 3 - HT cables
Please confirm whether we need to consider 33 kV Earthed
Cable
Yes
8
S.NO - E.1 & B - 33Kv & 11Kv HT Panels
Please confirm whether we can consider AL Bus bar instead
Except RMG consider aluminium busbar
of Copper Bus Bar
9
S.NO - 3 - HT cables
Please confirm whether we can consider Standard compact
circular aluminium conductor, Conductor screen with
extruded semi conducting compound XLPE insulated,
Insulation screening with extruded semi conducting
OK.
compound in combination with copper tape (.3 kA for 1 Sec)
AL Flat strips armoured and over all pvc sheathed cable as
per IS 7098
10
S.NO - 5 - Control cables
Please confirm whether we can consider YFY cable or YWY
Cable. There discrepancy between BOQ heading and BOQ YFY CABLES only consider for control cables
Line items
11
S.NO - C 1 - Bus duct
12
SL.NO - 2 - Main distribution panel
13
SL.NO - 2 - Main distribution panel
14
S.NO - 2 - Main distribution panel
if there is any mis Mis Match between SLD and BOQ BOQ
will super seede SLD Please confirm
15
S.NO - 4 - LT Cables
Kindly confirm if we can consider XLPE Insulated, Flat Strip
Armoured, PVC Outersheathed Aluminium Armoured Cable
XLPE acceptable
as per IS 7098 Standards for the mentioned line items as the
BOQ says PVC Al Ar Cable
16
S.NO - 5 - Cable trays
Please confirm whether we can consider Ptny Make cable
trays in our offer. Patny is one of reputed make in Market
Please confirm whether we can consider Sand wich Busduct
only Sandwich type .
instead of Air Insulated Bus Duct
Can we consider any Reputed CPRI Test Certified Panel
Only as per revised approved makes manufacturer list.
Manufacturer Make for LT Panel ?
Please confirm whether we can consider up to 400 A
MCCB''s Thermal Magnetic above 400 A MCCB's Micro
upto 250 thermal type above 250 microprocessor based
processor Based
Page 1 of 7
As per BOQ
Follow as per approved makes
Project Name: Construction of New Buildings for IIT Madras
Research Park – Phase – II,
SH: -Electrical works – Package-1 – Substation works
Sl no
CLAUSE REFERENCE
PRE-BID QUERIES
BIDDER'S QUERY
Clients Reply
17
S.NO - 5 - Cable trays
Please confirm Can we quote for Pre Galvanized type Cable
OK.
Trays for both Ladder type & Perforated type trays?
18
S.NO - 5 - Cable trays
Please confirm whether we need to consider Supports in our
OK.
Cable tray pricing as separate line item mentioned in KG''s
1-Make : We request you to kindly include the
following make also in the approved list.
22
a) LT PANEL/ BUS DUCTS: Shanti-( The same
is functioning in Phase -I )
As per revised approved make
23
b) ACB / MCCB : L&T / ABB
As per revised approved make
24
25
c)HT Panel : WE are considering Megawin /
Kirloskar HT panel with VCB.
d)HT & LT Cables : Polycab - since same is
approved in Package -2
As per revised approved make
As per revised approved make
1. Schneider has also manufacture RMG Via Alliance
partner ( HOWELLS ENGG )
2. MG has to be changed to Schneider and request you to
remove Kirolskar and Megawin
3. HT panel , Schneider has their alliance partner in chennai
( Howells Engg ) request to approve the same
4. Request to change the Air insulated to Sandwich , (
Legrand / Siemens / Schneider ) as like PREVIOUS package
.
26
RMG PANEL
27
VCB
28
HT PANEL
29
BUSDUCT
30
ACB
31
MCCB
32
CAPACITORS
33
INVERTER
8. Request to include Schneider make
RELAYS
9. Request to remove CSPC relay which uncomparable with
As per revised approved make
the other make .
34
As per revised approved make
As per revised approved make
As per revised approved make
As per revised approved make
5. Request to remove GE and CS ( Both are techno
As per revised approved make
commercial not suitable with MNC )
6.Request to remove GE and CS ( Both are techno
As per revised approved make
commercial not suitable with MNC )
7.Request to include Schneider make ( pl Remove Havells /
As per revised approved make
Energie and GE which are not proven )
As per revised approved make
35
1. The specifiction doesn’t calls for Internal Arc Test , Would
Arc Test is not necessary
you like to have tested panel ( 26.2 KA/ 1 sec )
36
2. Request to have all components in the panel shall have
same make like ( Relay / Vaccum Bottles )
37
38
3. Request to have Alu- Zinc enclosure for the 11KV & 33KV
TECHNICAL SPECIFICATION FOR 33 KV & 11 KV panel ( Corrosion Proof )
HT INDOOR VCB PANEL
4. Do you required IAC test for all three compartments (
Busbar / Breaker / Cable chamber Compartment )
Page 2 of 7
OK.
As per tender CPRI
As per tender
Project Name: Construction of New Buildings for IIT Madras
Research Park – Phase – II,
SH: -Electrical works – Package-1 – Substation works
Sl no
CLAUSE REFERENCE
PRE-BID QUERIES
BIDDER'S QUERY
Clients Reply
39
5. Cable termination height shall be 600mm for ease of
termination .
OK.
40
6. Would you like to have Duty Cycle tested - E1 , M1, C1
Test certificate to be submitted
41
1.We recommend Communication RS 485 to convert
Ethernet ( Ease for Plug & Play )
OK.
42
2. Restricted Earth Fault / Under& Over Voltage / Master trip OK.
recommended Numerical relay .
43
MAIN DISTIBUTION PANELS2.1 MAIN MV PANEL-3
44
45
3. In outgoing Breaker ACB , We recommend CT less
solution like Front Display Module Solution .
OK.
4. Each Vendor have two to three types of Breakers in ( ACB
& MCCB ) , So you shall be precise in Specification else you
will endup with wrong product .There is no detail
Follow as per tender specifications
specification of ACB and MCCB , You have provided only
BOQ . There is no detail information of the product in BOQ .
request you to give detail Spec of ACB and MCCB
46
49
Power Transformer & Distribution Transformer
a) Kindly confirm whether Supplier will organize for Oil
filtration, Testing & Commissioning or we need to quote for
erection, Oil filtration, Testing & Commissioning of "Free
Issue" of Transformer. Any Handling Cost will be paid or
should we consider & quote in Installation rate itself. Kindly
confirm.
51
MV Panels
a) We are considering Form 3B type 2 construction for
Panels & Form 2B construction for the DBs instead of Form
3B type is OK.
4 as mentioned in the specification [page No 59 of 182] LT
Panels (Form 4) type construction, Kindly Confirm..
53
DEGREE OF PROTECTION
b) We are considering IP42 degree of protection for Indoor
panels & IP55 degree of protection for Outdoor panels. Since
IP 42 indoor/IP54 outdoor
as per specification [Page No. 60 of 182] IP54 degree of
protection is mentioned . Kindly Confirm
55
CRCA Sheet
c) We are considering 2mm thick CRCA sheet for load
bearing members & 1.6mm thick CRCA sheet for Non-load
OK.
bearing members as per the specification Pg.No.[61 of 182].
Kindly Confirm
57
Base Channel
d) We are considering 75X40mm base channel for all the
panels. Since as per specification [Page No. 60 of 182]
100mm height or equivalent MS channel is mentioned.
Kindly Confirm
Page 3 of 7
Yes. Quote for All ( Testing, commissioning, unloading and
oil filtration)
70/40MM base channel considered OK expect RMG
Project Name: Construction of New Buildings for IIT Madras
Research Park – Phase – II,
SH: -Electrical works – Package-1 – Substation works
Sl no
CLAUSE REFERENCE
PRE-BID QUERIES
BIDDER'S QUERY
Clients Reply
59
MCCB
e) We are considering upto 160A adjustable thermal & fixed
short circuit and above 160A adjustable thermal & adjustable
short circuit for the MCCBs. Since as per the specification all
outgoing MCCBs in Main DBs and Incoming MCCBs of all
OK.
Sub DBs shall be of adjustable overload and short circuit
protection and as per the BOQ MP Based MCCBs for
Incomer is mentioned. Kindly Confirm
61
CURRENT TRANSFORMERs
c) We are considering Class1.0 accuracy for all CTs and
meters for all the panels. Since as per the Specification
Consider as per tender 0.5 accuracy only
[Page.No.104 of 182] Class 0.5 accuracy for all the
CTs and Meters is mentioned. Kindly Confirm
63
Earth busbar
d) We are considering aluminium earth busbar for wherever
main busbar is aluminium & copper earth busbar for
Aluminium is OK
wherever main busbar is copper. Kindly Confirm
65
Main MV Panel - 3
Main MV Panel - 4
e) We are considering individual harmonics up to 15th level
for Incoming Meter. Since as per the manufacturing standard upto 15th harmonics is adequate.
25th level is not available . Kindly Clarify
f) We are considering 2Nos. TPN 70Ka Manually operated
fixed type MCCB for Outgoing. Kindly Confirm.
66
Instead of MCCB , mechanical draw out ACBs are considered
for all outgoing feeders in MV panels.
68
DG power & control relay panel
g) As per SLD & Boq 4Nos of 1000Kva DG rating is
mentioned but as per the Specification 4Nos of 1250KVa DG
Follow as per BOQ & SLD
rating is mentioned. Kindly Confirm whther to quote as per
the SLD or as per the Specification.
69
DG power & control relay panel
h) As per SLD 2Nos of 5000A ACB feeder is mentioned but
as per the & Boq 3Nos of 5000A ACB feeder is mentioned
for the Buscoupler. Kindly Confirm whether to quote as per
the BOQ or as per the SLD.
As per SLD
70
DG power & control relay panel
i) As per the detailed Boq we have understood that AMF,
Auto load sharing & synchronizing will be done through
PCC3100 microcontroller based of DG supplier, so we are
not considering any AMF relay & component and DG sync
relay in DG power & control relay panel. Kindly confirm.
panel deleted in this scope
71
DG power & control relay panel
j) Kindly confirm whether we need to consider DG sync relay
& DG sync components. Since as per specification [Page
panel deleted in this scope
No. 75 of 182 & 54 of 182] Easygen 3200 relay and DG
synchronising & load sharing relays is mentioned.
72
Capacitor panel - 350Kvar
k) We are considering MPP gas filled type capacitor. Kindly
Confirm
Page 4 of 7
Gas filled type capacitors are not accepted Supply is to be
made as per BOQ.
Project Name: Construction of New Buildings for IIT Madras
Research Park – Phase – II,
SH: -Electrical works – Package-1 – Substation works
Sl no
CLAUSE REFERENCE
PRE-BID QUERIES
BIDDER'S QUERY
Clients Reply
73
Capacitor panel - 350Kvar
l) We are considering 7% detuned reactor as per
manufacturing standard since 6% detuned reactor is not
available in manufacturing range.
75
Commercial metering panel
m) Kindly confirm whether to consider ACB or MCCB for
Incomer. If we have to consider MCCB then we are quoting
our rates for manually operated fixed type MCCB.
ACB is to be considered.
77
DG auxiliary panel
n) Shall we quote as per BOQ. Since SLD is not available.
Kindly confirm.
Quote as per BOQ
7% is OK.
78
o) As per the SLD 50ka breaking capacity is mentioned but
as per the BOQ 70ka breaking capacity is mentioned. Kindly Quote as per SLD
clarify whther to quote as per the BOQ or as per the SLD.
79
p) We are not considering controller for synchronizing solar
power with grid power. Since it is in solar power vendor
scope.
80
q) We are not considering control cable connection between
sync panel and DG set, since it is not in our scope. Since as
OK.
per specification [Page No. 75 of 182]. The control cable
connection between sync panel and DG set has to be done
by the panel supplier.
Yes
81
DISTRIBUTION BOARDS
Can we consider 100mA ELCB instead of 30mA, since this
may cause nuisance tripping. Kindly confirm.
82
MISCELLANEOUS - SUPPORTS
We understand that steel supports for suspension of cable
trays (Ladder & Perforated) will be measured under this
consider MS steel in Kg
item. Whether steel for MS Chequred plate supports also will
be measured in this item. Kindly confirm.
84
RUBBER MAT
We are considering 1.1kv Grade '3mm' thick ISI marked 2mtr
x 1mtr Rubber Mat. Since, as per New IS - 12mm, 10mm,
Follow as per ISI
6mm thickness are not in manufacturing range. Available
thickness is 2mm & 3mm thickness only. Kindly clarify.
86
Statutory Approvals
Kindly specify the extent of Power Sanction to be optained
from TANGEDCO.
6MVA (approximate)
88
Modification works in Existing MV Panels
a) Kindly provide GA drawings of existing MV Panels.
Needs to be seen at site and drg prepared as built.
89
b) Kindly confirm whether space provision is available for
adding these switchgears or new verticals needs to be
added.
New verticals are to be added
90
ELINS SWITHBOARDS PVT LTD., [ Our own sister concern
company
to achieve better time schedules, manufacturing Quality
As per revised approved make
Switchboards. The Switchboards are type tested at CPRI
and we can produce necessary Test Certificates.]
(1) LT PANELS
Page 5 of 7
Except lighting DB other DB's are agreed 100mA
Project Name: Construction of New Buildings for IIT Madras
Research Park – Phase – II,
SH: -Electrical works – Package-1 – Substation works
PRE-BID QUERIES
BIDDER'S QUERY
Sl no
91
92
CLAUSE REFERENCE
(2) MCB
(3) CABLE TRAYS
ABB
ELINS - Self Fabricated
93
Main MV panel-3/Main MV panel 4
Main MV panel-3/Main MV panel 4
94
For Transformer incomer, Restricted earth fault
relay and Master trip relay are mentioned
For Transformer incomer, Restricted earth fault relay and
Master trip relay, 20/C +1E/F Relay, under voltage/Over
Voltage are mentioned
Quote as per BOM
95
For DG Incomer, Master Trip relay is mentioned
For DG Incomer, Master Trip Relay, 20/C +1E/F Relay,
under voltage/ Over voltage are mentioned
Quote as per BOM
96
For solar Incomer, Master trip relay is mentioned
For Solar Incomer, Master Trip Relay, 20/C +1E/F Relay,
under voltage/ Over voltage are mentioned
Quote as per BOM
97
In commercial Meeting Panel Feeder, Unver
voltage relay and Master trip relay is mentioned`
For commercial meeting panel feeder, Master Trip Relay,
20/C +1E/F Relay, under voltage/ Over voltage are
mentioned
Quote as per BOM
98
99
Busbar size
Phase: 150X10X2run Alu
Busbar size
Phase:150X12X2run Alu
100
Neutral:150X10X2run Alu
Phase:150X12X2run Alu
101
Earth:50X6X2run Cu
Earth:50X6X2run Cu
102
DG Synchronising panel(Indoor)
DG power & control relay panel suitable for
2X1500KVA+4X1000KVAR DG sets
Quote as per BOM
103
Buscoupler-2Nos are mentioned
Buscoupler-3Nos are mentioned
2nos Quote as per BOM
104
No 800A MCCB Feeder
800A MCCB outgoing-2nos are mentioned
2no
105
No 630A MCCB Feeder
630A MCCB outgoing-2nos are mentioned
2no
Capacitor panel with Power conditioner
YES
De-tuned Reactor is mentioned as 6%
7% is OK.
106
107
Clients Reply
As per revised approved make
As per revised approved make
Quote as per BOM
108
Main lift panel (Service area in MLCP)
Quote as per SLD and revised BOQ
109
Lift power panel
It is not in this package
110
Service lift power panel
It is not in this package
Page 6 of 7
Project Name: Construction of New Buildings for IIT Madras
Research Park – Phase – II,
SH: -Electrical works – Package-1 – Substation works
Sl no
CLAUSE REFERENCE
PRE-BID QUERIES
BIDDER'S QUERY
Clients Reply
Commercial
SL .NO
Queries
IITMRP Reply
1
Kindly provide the soft copy of BOQ to enable us easy working of
taxes and duties
We have uploded excel file in website
2
Will any changes be considered in Payment Terms. Kindly Clarify
As per Tender
3
We request you to kindly provide Electric Power at one point
required for carrying out the installation work.
As per Tender
4
Please confirm whether "C Form" for considering Concessional
Central Sales Tax CST @ 2% Under E1/E2 Sales for all interstate
procurements can be issued or any other tax concession is
applicable for this project.
No tax benefits
5
We understand that the Printed Bill of Quantities with rates filled
Yes
in signed on each page can be submitted.
6
Kindly forward the Excel format of the BOQ for easy
7
TERMS OF PAYMENT
20% Advance
2) 65% against the delivery of material
3) 10% against Installation
8
LD CLAUSE Max LD of 1/2% per week subject to max of 5% of
Contract Value.
As per Tender
9
We would request you to Waive of Penalty clause as LD clause
mentioned in tender
As per Tender
10
Extention date for Tender documents submission
Extended up to 27/11/14 - closing hours
NIB indicates Financial turnover of Rs 550 Laksh on 33KV
SUBSTATION works only
33KV/11KV work acceptable
Page 7 of 7
As per Tender
1)
As per Tender
1/--pages
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