TENDERTECHNICALSPECIFICATION
FOR SUPPLY, ERECTION (INCLUDING
CIVIL WORK), COMMISSIONING &
TESTING OF 11KV RMU (RING MAIN
UNIT) AT KHAJOD UNDER ALTHAN
S/DN OF PIPLOD DIVISION
PART - II
TECHNICAL
SPECIFICATIONS:
DGVCL/SP/1004/Project/Khajod/Technical Specifications
Date
Place
Signature of the tenderer
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Company’s Round Seal
INDEX
1.0
Supply, Erection, Commissioning And Testing Of
11kv Sf6 Insulated Ring Main Unit With Vacuum
Circuit Breaker.
2.0
List of Approved Makes of Equipments and
Accessories for Proposed Project
DGVCL/SP/1004/Project/Khajod/Technical Specifications
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GENERAL INFORMATION (TECHNICAL):
1.1. CODES, STANDARDS & REGULATIONS
The design, manufacture, erection and testing of the equipments and material to be supplied
shall comply with latest revisions of relevant Indian Standards or equivalent IEC standards. In
addition, the Indian Electricity Rules, Electricity Act 2003,Statutory requirements of Central
Govt., GERC and State Government of Gujarat( applicable codes), shall also be complied
with. Any complications arising out of it will be set right by the bidder without any implication
to DGVCL. The bidder shall submit his offer as per information given in submission of tender.
Drawings, Data and Documents
The bidder shall furnish following documents/ information along with offer in spiral bound
volumes. General description of equipment offered specifying the important features,
make, technical parameters, materials of construction etc. To enable DGVCL to have proper
understanding of the material offered and its operation.
The drawings and documents shall be furnished to DGVCL by the successful bidder for approval of
DGVCL, within the period stipulated in the draft contract/mutually agreed terms at the
time of placement of order, the bidder shall submit a list of all such drawings and documents he
proposes to submit. The list will be approved by DGVCL and may be modified, if
necessary. Each drawing
/document in the list shall be identified with a serial number, description and scheduled
date of
submission. This should be submitted in a spiral bound volumes.
1.2. FOR REFERENCE
•
•
•
•
•
OEM’s Complete and comprehensive i n s t r u c t i o n manuals with
operation and maintenance of the equipments supplied by the bidder.
Preventive maintenance schedule for each equipment.
Procedure for shutdown and HT equipment.
Safety procedures for safe operation of equipment and complete system.
Test procedure for site tests.
drawings
for
1.3. AS- BUILT DRAWINGS
On completion of installation, testing and commissioning, the bidder shall in Corporate
visions/ modification if any, in the reproducible and submit ‘as built’ drawing for DGVCL’s
record in spiral bound volumes and soft copy. The drawings shall be in AutoCAD DXF format.
1.4. TEST AND INSPECTION FOR INDIVIDUAL ITEM
Routine test/ Acceptance tests shall be carried out on all equipment at manufacture’s works/
ERDA as per appropriate IS/IEC. The bidder shall make reasonable facilities, at his cost for
inspection and testing of the equipment/material by DGVCL’s Officials. No equipment/item shall
be dispatched to site without provisional certificates of acceptance issued by DGVCL. Inspection
and test shall be carried out at the place of manufacture as well as on receipt of the
equipment at site if required. Inspection and tests do not relieve the bidder of his
contractual obligations regarding performance of the equipment at site/in actual use.
The bidder shall submit the brief summary of all type test certificates for similar equipment
supplied by him elsewhere and the actual type test certificates as and when asked. In case type
test certificates for similar equipment is not available, the same shall be conducted in the
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presence of DGVCL’s Authorized representative if DGVCL so desires, without any financial
implications to the DGVCL. The type test report shall not be older than 5 year from the date of
tender opening (Technical bid opening). The supplier of the equipment shall ensure that the
equipment available at his works for routine test/type test/acceptance test are duly calibrated
and necessary certificate shall be made available to the inspecting officer of DGVCL.
As far as possible, the supplier of equipment shall give a minimum of 15 days notice of readiness
of material and give the inspection call accordingly. If on arrival of inspecting officer at the
works, the material is not found to be ready, the concerned supplier of equipment shall be liable
for additional expenditure DGVCL may incur on account of retention or re-deputation of the
inspecting officer.
The officer deputed for inspecting for particular lot of material according to intimation from you
may also like to check Quality Control Plan and for that purpose he may demand the Test Reports
of raw material being procured.
1.5. FUNCTIONAL AND COMPOSITE TESTING
Following test shall be conducted on equipment after completion of erection in the
presence of Engineer-in-charge from point of view of completeness in the presence of DGVCL’s
Authorized Representative.
•
•
•
•
•
•
•
•
•
•
Visual inspection of total system.
Checking of continuity of power and LT/HT cables.
Checking of nameplate data of complete system.
Verification and measurement of earthing resistance.
Checking of cable terminations and laying, dressing etc. in the equipment kiosk.
Checking of safe accessibility of components.
All the equipments and materials shall be passed through checks and test as per
approved Field Quality Plan.
The insulation resistance test shall be carried out
HV installation above 11 KV- by 2500V M e g g e r
Power circuit of voltage up to 1KV- by 1000 V Megger
1.6. BAR CHARTS
The Bidder shall furnish along with the bid, the bar charts in Project and project schedules
indicating starting and completion dates of each activity, such as preparation & approval of
drawings, manufacturing/supply/ delivery, civil works, Cable laying erection, testing, pre
commissioning and commissioning etc. so that quarter wise completion activities suffice the
purpose for releasing the connections.
1.7 GENERAL
Identification labels shall be provided on all equipments as per client’s approval. All labels
shall be engraved on plastic (white letters with black background) and all text shall be in English
language.
Any exclusion /deviation from specification shall be clearly spelt out and listed at one place
only and bidder shall substantiate the same with appropriate reasons. In the absence of clearly
spelt out and mutually agreed deviation, it shall be considered that the bidder has undertaken to
comply with the technical specification totally, in letter and spirit.
It will be responsibility of the successful bidder to obtain necessary approval of statutory
authority as per rules of Govt. of Gujarat before energizing/ charging the equipment/system.
However bidder shall be extended all assistance by the DGVCL in regard to application for the
same. For installation work at site, the bidder shall be fully responsible for arranging the supply
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of required tools and tackles, welding sets, cable crimping tools, labours, scaffolding, ladders,
etc.
The power connection will be provided by DGVCL at one point only at the prevailing tariff, from
where the bidder has to arrange for temporary connection and further distribution of supply at
his own cost. The installation of energy meter, cut out, switches etc. for construction power shall
be as per prevailing norms of DGVCL. The test report and other requirement to release the
connection shall be as per prevailing rules of DGVCL.
On completion of the installation but before energizing the system, all installation shall be
physically checked and properly tested. These checks and tests shall be conducted by the
bidder under the supervision of Engineer In-charge and bidder shall furnish the final status
and test results shall be made good by the bidder free of cost within contract completion period.
All clamps, brackets, bolts, nuts, screws, markers, ferrules, lugs and glands and other
hardware necessary for erection work, shall include in the scope of work and shall be arranged by
the bidder.
1.8 APPROVED MAKES OF EQUIPMENTS /ITEMS OF SUPPLY.
List of approved makes of equipments and accessories for proposed whole
project. (Sheet below)
Notes
(i)The DGVCL reserves the right to make changes (add or delete names of other makes) in
the list during execution of contract.
(ii) If bidder wants to propose additional vendors for any of the items, same shall be stated
along with the tender or within 30 days from the date of LOI & decision thereof will be
conveyed within 30 days thereafter by DGVCL.
2.0 INSPECTION AND TESTING OF EQUIPMENT
Manufacturing Progress reviews, inspection & testing of equipment covered under the technical
specification shall be carried out by the DGVCL’s Authorized Representative at the manufacturer’s
works/premises prior to dispatch, to ensure that their quality & workmanship are in conformity with
the contract specifications and approved drawings.
3.0 RESPONSIBILITY FOR INSPECTION
Any inspection by the DGVCL’s Authorized Representative does not relieve the Bidder from his
responsibility of quality assurance and quality control functions.
As such, any approval which the Inspecting Engineer of the DGVCL may have given in respect of
equipment and other particulars and the work or workmanship involved in the contract (whether
with or without test carried out) shall not bind the DGVCL to accept the plant & equipment, should
it on further tests at site be found not comply, with the requirements of the contract. If
required, audit wing of DGVCL Inspection Department shall also be entrusted with inspection of
particular item/equipment received at site. The bidder is to meet the inspection & testing
requirements for the equipment coming under the statutory regulations e.g. weights &
measures, safety, IE rules, etc. and submit calibration certificates and documents from
appropriate authority to the DGVCL Inspecting Engineer for the same, on demand.
4.0 METHOD OF GIVING INSPECTION CALLS
Inspection calls shall be given by the Bidder to Chief Engineer DGVCL, Surat in accordance with
mutually agreed program with 15 days’ clear time for all equipments. Four sets of relevant
test certificates and inspection report of the Bidder/ Sub-bidder after satisfactory completion of
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internal inspection and test shall be submitted along with acceptance/routine test certificate of the
tests witnessed by DGVCL Inspector.
The DGVCL reserves the right to visit at any stage of manufacture at plant and ask for
additional inspection & tests if it is found necessary after completion of detailed design &
engineering and approval of drawings. The DGVCL or his duly authorized representative
shall on giving written instructions to the bidder, setting out any grounds of objection which
he may have in respect of the work, be at liberty to reject all or any part of
plant/equipment or workmanship which are not in conformity with the contract provisions.
5.0 BIDDER’S RESPONSIBILITY
The Bidder shall provide all reasonable facilities to the Inspecting Engineer of the DGVCL to
the Bidder’s or their sub-bidder’s premises at any time during contract period, to facilitate him to
carryout inspection & testing of equipment during manufacture of equipment.
The Bidder shall delegate a representative/coordinator to deal with DGVCL on all inspection
matters.
The Bidder shall comply with instructions of the DGVCL’s Inspecting Engineer fully. The Bidder
shall ensure that the equipment and materials once rejected by the Inspecting Engineer are not
reused in the manufacturing of the equipment and materials. Where parts rejected by the
Inspecting Engineer have been rectified as per agreed procedures laid down in advance, such
parts shall be segregated for separate inspection and approval, before being used in the work.
6.0 INSPECTION WAIVER
For certain standard bought-out items and the products of reputed firms where the DGVCL has
earlier experience on the quality of their products, the DGVCL may consider allowing of
inspection waiver for such items. The Chief Engineer DGVCL, Surat shall issue approval of
inspection waiver certificate after scrutiny of bidder’s internal inspection report, test certificates
and other documents. However, it is not binding upon DGVCL to give waiver on bidder’s
request. DGVCL may weigh the important issues like quantity of material, cost of material,
importance of material, distance of travel & time of travel required to inspect before deciding the
waiver of the inspection.
7.0 AUDIT INSPECTION
From the lots inspected by the DGVCL, the Inspector of DGVCL may pick up samples from the
lots supplied at stores of contractor at random for quality check only.
The samples picked up will be tested for acceptance test / type test or as decided by DGVCL at
Government/ NABL approved laboratory or ERDA laboratory at DGVCL RSO, Surat or any store
of DGVCL, in presence of representatives of contractor and DGVCL as per relevant ISS/BIS/
DGVCL specifications. The test results will be binding on the suppliers and DGVCL, in
general will not allow re-sampling. If the material fails in any of the acceptance tests carried
out, the full lot of materials will be considered as rejected, and if replacement is not possible due
to consumption of the materials then in that case for whole of the rejected lot, DGVCL will
deduct maximum up to 30% (Thirty) of the contractual order cost of that item. If the same are not
utilized / consumed, then DGVCL may ask for replacement at sole discretion of DGVCL or may
accept with maximum deduction up to 30% (Thirty) of the contractual order cost of that item,
and all these will be binding on the contractor.
In case if the materials does not confirm to specifications or fails at Government approved
laboratory or other laboratory decided by DGVCL for testing and if subsequent testing are to
be carried out (which will solely at DGVCL discretion), then all Testing fees, expenses of the
inspector and other expenses incurred by DGVCL will be to contractor’s account. The
decision in this regard for acceptance as above of DGVCL shall be final and this will be binding
on the contractor.
DGVCL/SP/1004/Project/Khajod/Technical Specifications
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Company’s Round Seal
8.0 OTHER CONDITIONS
Any clarification / amendment necessary, in any or more clauses incorporated in the present A/T,
you will have to make a detailed reference to the DGVCL latest within ten days from the receipt
of A/T. If you fail to do so, no request for any clarification / amendment shall be considered
thereafter. Please also note that all the points which need clarification / amendment should be
brought out at once. No piecemeal clarification/amendment will be entertained.
9.0 PRE INSPECTION AND VERIFICATION OF SITE BY BIDDERS
Bidder, if desire, may visit and inspect proposed work site of Khajod under Althan S/dn of
Piplod Division. Prospecting bidder may contact our Executive Engineer (O&M) Shri R.M
Parmar Piplod division (082380 41553) with prior appointment and confirmation.
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1.0: SUPPLY, ERECTION, COMMISSIONING
AND TESTING OF 11KV SF6
INSULATED RING MAIN UNIT WITH
VACUUM CIRCUIT BREAKER
SYSTEM RATED VOLTAGE UP TO 12 kV
DGVCL/SP/1004/Project/Khajod/Technical Specifications
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SPECIALINSTRUCTIONSTOBIDDER
Please read following instructions carefully before submitting your bid.
1.
All the drawings, i.e. elevation, side view, plan, cross sectional view etc., in AutoCAD
format and manuals in PDF format, for all items including installation (civil work)
shall be submitted. Also the hard copies as per specification shall be submitted.
2.
The bidder shall submit Quality Assurance Plan for manufacturing process and Field
Quality Plan with the technical bid.
3.
The bidder shall have to submit all the required type test reports f o r the offered
item. However, in the event of partial submission or reports older than specified
limit, bidder must submit his confirmation for those type test report/s to be
submitted in the event of an order, without affecting delivery schedule, before
commencement of supply, free of cost. In a b s e n c e of t h i s c o n f i r m a t i o n ,
the evaluation shall be carried out accordingly as non submission of type test reports.
4.
The bidder must fill up all the point of GTP for offered item/s. Instead of indicating
“refer drawing, or as per IS/IEC”, the exact value/s must be filled in.
5.
All the points other than GTP, which are asked to confirm in technical specifications
must be submitted separately with the bid.
6.
The bidder is required to impart training in view of manufacture, assembly, erection,
operation and maintenance for offered item, at his works, to the person/s identified
by DGVCL, in the event of an order, free of cost. The cost of logistics will be bear by
DGVCL.
7.
Please note that the evaluation will be carried out on the strength of content of bid
only. No further correspondence will be made.
8.
The bidder shall bring out all the technical deviation/s only at the specified annexure.
9.
The bidder
should
indicate
manufacturing
capacity
by s u b m i t t i n g
latest
updated certificate of a Chartered Engineer (CE).
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QUALIFYINGREQUIREMENTDATA
(For Supply)
Bidder to satisfy all the following requirements.
1)
The principal manufacturer/s of bidder shall be Original Equipment
Manufacturer (OEM). The offered equipment have to be designed,
manufactured and tested as per relevant IS/IEC with latest amendments and
approved vendor of DGVCL.
2)
The minimum requirement of manufacturing c a p a c i t y of OEM for offered
type, size and rating of equipment shall be 7 times tender / bid quantity. The
bidder should indicate manufacturing capacity by submitting latest updated
certificate of a Chartered Engineer (CE).
3)
Equipment proposed sh all be of similar or higher rating and in service for a
minimum period of Five (5) years and satisfactory performance certificate in
respect of this is to be available and submitted.
4)
The bidder should clearly indicate the qu an ti t y an d Single Value Contract
executed during last FIVE (5) years, for the offered equipment. Bidder should
have executed o n e si ngl e contract d u r i n g last five years for the q u a n t i t y
equivalent to tender / bid.
The details are to be submitted in following format,
Sr.
No
ITEMS
SUPPLIED
TO
ORDER
REFERENCE
No. & DATE
ITEMS
QUANTITY
ORDER
FULLY
EXECUTED.
YES/NO
STATUS, IF
ORDER
UNDER
EXECUTION
REMARK
5) Equipment offered shall have Type Test Certificates from Govt
approved/accredited laboratory (accredited based on ISO/IEC Guide 25 / 17025
or EN 45001 by the National accredition body of the country where laboratory is
located), as per IEC / IS / technical specification. All the required type tests
Should not be older than 5 (five) years from the date of opening of technical bid.
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TECHNICAL SPECIFICATION FOR OUTDOOR 11 KV RING MAIN UNIT
SWITCHGEAR
1.1
GENERAL:
1.1.1
All equipment and material shall be designed, manufactured and tested in accordance
with the latest applicable IEC standard.
1.1.2
Equipment and material conforming to any other standard, which ensures equal or
better quality, may be accepted. In such case copies of English version of the standard
adopted shall be submitted.
1.1.3
The electrical installation shall meet the requirement of Indian Electricity Rules-1956 as
amended up to date; relevant IS code of practice and Indian Electricity Act-1910. In
addition other rules and regulations applicable to the work shall be followed. In case any
discrepancy the most stringent and restrictive one shall be binding.
1.1.4
The high-tension switchgear offered shall in general comply with the latest issues
including amendments of the following standards but not restricted to them.
1.2 SCOPE:
Design, Engineering, Manufacture, assembly, Stage testing, inspection and testing before
supply and delivery at site, Erection, Installation, testing & Commissioning of Ring Main
units outdoor type SF6 filled , with various combinations of load break isolators &
breakers. The scope includes Supply, Erection, testing and commissioning of outdoor type
RMU with necessary take off terminal units for automations contains load break
isolators, breaker and associated accessories, equipments. (including civil works and
earthing-Erection of earthing by using GI strip (minimum 35 mm strip) with earthing
plate including cost of coal/salt to RMU). The Installation of 11KV Outdoor SF6 Insulated
RMU covering erection, testing and commissioning with associated equipment including
civil work of RMU, drawing and Bom(Bill of Material) of civil work submit by bidder along
with technical details.
The RMUs should be provided with necessary take off terminal units for automations
and all these units should be shielded in a outdoor metal-body for making them suitable
for outdoor use. The insulation/dielectric media inside the stainless steel welded tank
should be SF6 gas. The RMUS should be Modular, extensible type on both sides with
provision of attaching/connecting with SNAP FIT arrangement W/o External Busbars
additional load break switches and circuit breakers in future whenever required.
Alternatively Extension shall be possible by adding trunking chambers and required
accessories or by plug-in bushing type arrangement.
The Package scope of work shall include survey, design, manufacture, FAT and delivery,
installation and commissioning of new SCADA enabling equipments of new “SCADA-Read
The RMU should have compatibility with OPEN PROTOCOL SCADA system. Ring Main
Units capable of being monitored and controlled by the SCADA/DMS. The RMU should
have the castle lock for avoiding dual supplyand safety purpose.
Where relevant, the RMU scope of work shall be coordinated with the work to be carried
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out under the project’s other construction packages & associated materials to the
designated destinations as per this tender specification and Bill of quantities. supply &
fixing of relevant 11KV cable termination kits indoor type and jointing kits (if any) at
RMU side as per relevant IS standard in bidder’s scape.
Each RMU shall include its own power supply unit (including auxiliary power
transformer, batteries, and battery charger), which shall provide a stable power source
for the RMU. The RMUs will be connected to the FRTU which will be procured, supplied
and installed as a part of Part A of R-APDRP. The RMU will also supply 230VAC 500VA for
FRTU.
FRTU, MODEM, Power and I/O cable interface between FRTU and Control panel of
RMU/sectionaliser are excluded in the scope of supply and these items will be provided
by DGVCL/SIA.
Each new RMU shall be equipped with main-line load break switches and a fault passage
indicator (FPI). Furthermore, to protect each of its lateral / transformer feeders, it shall
be equipped with a corresponding set of circuit breakers and self-powered numerical
relays. The RMU shall include potential-free contacts and control contacts so as to
connect to SCADA/DMS via FRTUs, so as to:
Monitor and control the open/closed status of the RMU circuit breakers and load break
switches.
Monitor the local/remote position of RMU motorised (in case if failure of motor)
manually-operated switches that can be used to enable and disable remote monitoring.
Monitor the health of the power supply, which will include battery failure and low
voltage indications.
Monitor the open/closed status of RMU earthing switches.
Monitor the open/closed status of RMU enclosure doors in case of Hinge doors.
Monitor for low SF6 gas pressure indication.
Monitor for circuit breaker relay operations.
Monitor for indication of main-circuit fault detected by the RMU’s FPI.
1.2.1 Configurations Required:11KV RMU (Both sides extensible refer 1.17 for more details)
a) 1-way (R) , 11KV ,Gas (SF6) Insulated RMU with 1Nos 630A load break switch
b) 1-way (L) , 11KV ,Gas (SF6) Insulated RMU with 1No. SF6 insulated VCB of suitable rating
c) 2-way (RL) , 11KV ,Gas (SF6) Insulated RMU with 1Nos 630A load break switch and 1No. SF6
insulated VCB of suitable rating d) 3-way (RRL) , 11KV ,Gas (SF6) Insulated RMU with 2Nos 630A load break switch and 1No.
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SF6 insulated VCB of suitable rating –
e) 3-way (RLL) , 11KV ,Gas (SF6) Insulated RMU with 1Nos 630A load break switch and 2No. SF6
insulated VCB of suitable rating f) 4-way (RRLL),11KV Gas (SF6) Insulated RMU with 2Nos 630A Load break switches and 2Nos ,
SF6 Insulated VCB of suitable rating –
g) 4-way (RLLL),11KV Gas (SF6) Insulated RMU with 1Nos 630A Load break switches and 3Nos ,
SF6 Insulated VCB of suitable rating –
h) 4-way (RRRL),11KV Gas (SF6) Insulated RMU with 3Nos 630A Load break switches and 1Nos ,
SF6 Insulated VCB of suitable rating –
i) 5-way (RRLLL) , 11KV ,Gas (SF6) Insulated RMU with 2Nos 630A load break switch and 3No.
SF6 insulated VCB of suitable rating –
j) 5-way (RRRLL) , 11KV ,Gas (SF6) Insulated RMU with 3Nos 630A load break switch and 2No.
SF6 insulated VCB of suitable rating –
k) 6-way (RRRLLL) , 11KV ,Gas (SF6) Insulated RMU with 3Nos 630A load break switch and 3No.
SF6 insulated VCB of suitable rating.
Sr.
No.
1
2
3
Item Description
11KV RMU R
11KV RMU L
11KV RMU RL
4
11KV RMU RRL
5
11KV RMU RLL
6
11KV RMU RLLL
7
11KV RMU RRLL
8
11KV RMU RRRL
9
11KV RMU RRRLL
10
11KV RMU RRLLL
11
11KV RMU RRRLLL
Unit
Nos.
Nos.
Nos.
Nos.
Nos.
Nos.
Nos.
Nos.
Nos.
Nos.
Nos.
DGVCL’s
Tentative
Quantity
1
1
1
1
2
1
11
1
1
1
4
Note: R stands for isolators
L stands for Circuit breaker
PLS NOTE: THE NOMINAL CURRENT RATING OF VCB SHALL BE ACCORDING TO LOAD OF
THE FEEDER AND ACCORDINGLY SUITABLE RELAY SHALL BE PROVIDED AND ANY CHANGE IN
COMBINATION/CONFIGURATION SHALL BE EXECUTED WITH THE APPROVAL OF CHIEF
ENGINEER OF RESPECTIVE DGVCL.
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1.1 This Specification provides for design, manufacture, inspection and testing
before
dispatch, packing and delivery F.O.R.(Destination) of SF6 insulated RMUs with necessary take
off terminal units for future automations, compatible with SCADA system other accessories and
auxiliaries equipment and mandatory spares, described herein and required for their satisfactory
operation.
1.2. The objective of the RMUs is for extremely small construction width, compact, maintenance
free, independent of climate, easy installation, operational reliability, Safe and easy to operate,
minimum construction cost, minimum site work and minimum space requirement.
1.3. The RMUs shall conform in all respects to high standards Of Engineering design,
workmanship and latest revisions of relevant standards at the time of offer.
RMU to be installed on Plinth Erection of plinth with cost of cement etc as per below
requirement Plinth size minimum 5’x4’x2’ or as per required Cement ratio 1: 2 : 4 ;Weight of
RMU 510 kg to 1000 kg.
1.4. The type of the 11 KV circuit breaker shall be VCB and insulating medium for load break
isolators, Earth switch,
11 KV Buses and other associated equipments should be SF6 gas. Necessary current sensors /
transformers for protection and metering (wherever required). All necessary dry (potential-free)
contacts for indications relevant to RMU monitoring status and control. A PT Panel including
auxiliary power transformer for measurement of system voltage and for charging the batteries.
Battery and battery charger, to provide stable as per motor rating, 24 VDC, power for the RMU’s
motors. Capacitor voltage dividers serving live-line cable indicators.
1.3 GENERAL:
The Ring Main Unit shall be installed at 11 KV junction points to have continuous supply by
isolating faulty sections. The RMU shall be extensible on both sides and consists of the
following combinations of load break switches and Circuit breakers for a nominal voltage of 12
KV using SF6 gas as insulating and Vacuum as arc quenching medium.
The RMU and combination shall be tropicalised and outdoor metal enclosed type. The RMU
metal parts shall be of high thickness, high tensile steel which must be grit/short blasted,
thermally sprayed with Zinc alloy, phosphate or should follow the 7 tank pre-treatment process
and be subsequently painted with polyurethane based powder paint. The overall paint layer
thickness shall be not less than 80 microns.
Relevant IE rules for clearances, safety and operation inside the enclosure shall be applicable. The
enclosure shall be IP 54 and type tested for weather proof at EREDA/CPRI.
All live parts except for the cable connections in the cable compartments shall be insulated with
SF6 gas. The SF6 gas tank shall be made of robotic or TIG or MIG welded stainless steel, to have
the best weld quality. The gas cubicle shall be metal enclosed with stainless Steel of thickness
as per IEC tested/ designed so as to provide safety and to avoid leakage of gas and should be
provided with a pressure relief arrangement away from operator.
DGVCL/SP/1004/Project/Khajod/Technical Specifications
Date
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Both the load break switches and the tee off circuit breaker must be motorized.
The cable box of isolators and circuit breakers both should be of front access type as per site
requirement.
Any accidental over pressure inside the sealed chamber shall be limited by the opening of a
pressure-limiting device in the top or rear-bottom part of the tank or enclosure. Gas will be
release to the rear of the switchboard away from the operator and should be directed towards
the bottom, into the trench to ensure safety of the operating personnel and the pedestrians /
civilians. All the manual operations should be carried out on the front of the switchboard.
1.3.1 GENERAL TECHNICAL REQUIREMENTS
1 Fixed type SF-6 gas insulated / Vacuum circuit breakers. It should be maintenance free,
having stainless steel robotically/ TIG / MIG welded enclosure for OUTDOOR RMU. However,
offer with high quality of the welding which has necessary extensive leakage test with leak rate
of 0.1% per annum can be accepted. The RMUs to be used are only outdoor type.
2 Low gas pressure devices- 1.2 Bar pressure. RMU should have full rating with 0.0 Bar gas
pressure.
3 Live cable indicators- High operator safety.
4 Fully Rated integral ear thing switch on each device.
5 Self powered Microprocessor Based relay- Does not require any external source of power.
6 Units fully SCADA Compatible. Retrofitting at site possible at a later date. Line switches (Load
break switches) as well as T- OFF circuit Breaker can be operated by remote. ( Manual operations
should be possible in case of motor failure.)
7 For indoor Cable boxes should be front access and interlocked with earth switch. No rear /side
access required. For outdoor RMUs cable boxes shall be on front.
8 Cable testing possible without disconnection of cables.
9 Compact in dimension.
10 Circuit Breaker with self powered O/C & E/F RELAY.
11 Low pressure, sealed for life equipment, can operate at “0” bar pressure.
12 Cable ear thing switch on all switching device-standard, for operator safety.
13 Enclosure with IP 54 standard protection for OUTDOOR RMUs and IP2X for INDOOR RMUs
14 All live parts should be inside a stainless steel enclosure for outdoor type RMU & minimum 2
mm thickness of stainless steel robotically/TIG/MIG welded enclosure for Outdoor / indoor
RMU.
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1.3.2 TECHNICAL AND GUARANTEED PARTICULARS:
The bidders shall furnish all guaranteed technical particulars as called for in Schedule “A”
of this specification. Particulars which are subject to guarantee shall be clearly marked. Bids
lacking information in G.T.P are liable to be rejected
The Entire units or minimum three functions of RMU shall be enclosed in a single compact
metal clad, outdoor enclosure suitable for all weather conditions. The switchgear/steel gas
tank shall be filled with SF6 as per IEC/IS Standards relative pressure to ensure the insulation
and breaking functions. The steel gas tank must be sealed for life and shall meet the “sealed
pressure system” criteria in accordance with the IEC 298 standard. The RMU must be a system
for which no handling of gas is required throughout the 20 years of service life.
The RMU shall have a design such that in the event of an internal arc fault, the operator shall be
safe. This should be in accordance with IEC 298 and relevant Test certificates shall be submitted
with the Tender.
The offered switchgear and control gear should be suitable for continuous operation
under the basic service conditions indicated below. Installation should be in normal indoor
conditions in accordance with IEC 60694.
Ambient temperature – 10
degree C to + 45 degree C
Relative humidity - up to 95%
Altitude of installation - up to 1000m, IEC 60120
1.3.3 The RMU shall be tested for an internal arc rating of 20 kA for 1 Sec. for 11 KV RMU. Suitable
temperature rise test on the RMU shall be carried out & test reports shall be submitted with
tender for technical bid evaluation.
Each switchboard shall be identified by an appropriately sized label, which clearly indicates the
functional units and their electrical characteristics.
The switchgear and switchboard shall be designed so that the position of the different
devices is visible to the operator on the front of the switchboard and operations are visible as
well.
The entire system shall be totally encapsulated. There shall be no access to exposed conductors.
In accordance with the standards in effect, the switchboards shall be designed so as to prevent
access to all live parts during operation without the use of tools.
The entire 11 KV RMU are insulated by inert gas (SF6) suitable for operating voltage up to 13.8KV
respectively. The 11KV circuit breakers must be VCB breaker. It is necessary to fit an
absorption material in the tank to absorb the moisture from the SF6 gas. The SF6 insulating
medium shall be constantly monitored via a temperature compensating gas pressure indicator
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offering a indication at different temperature ranges, having distinctive RED and GREEN zones
for safe operation.
All the RMUs must be routine tested for the following at factory in India:
Micro-ohm test for the assembly inside the tank.
Circuit breaker analyzer test so as to ensure the simultaneous closing of all poles for VCB. SF6 gas
leak test.
Partial Discharge test on the complete gas tank so as to be assure of the proper insulation
level and high product life.
High voltages withstand.
Secondary test to ensure the proper functioning of the live line indicators, fault passage indicators
and relays.
1.3.4 Sulphur Hex fluoride Gas (SF6 GAS)
The SF6 gas shall comply with IEC 376,376A, and 376B and shall be suitable in all respects for use
in 11 KV RMUs under the operating conditions. The SF6 shall be tested for purity, dew point air
hydrolysable fluorides and water content as per IEC 376,376A and 376B and test certificate shall
be furnished to the owner indicating all the tests as per IEC 376 for each Lot of SF6 Gas.
1.3.5 DIELECTRIC MEDIUM
SF6 / VCB GAS shall be used for the dielectric medium for 11KV RMUS in accordance with IEC376.
It is preferable to fit an absorption material in the tank to absorb the moisture from the SF6 / VCB
gas and to regenerate the SF6 / VCB gas following arc interruption. The SF6 / VCB insulating
medium shall be constantly monitored via a temperature compensating gas pressure
indicator offering a simple go, no-go indication.
1.3.6 General structural and mechanical construction:
The offered RMU should be of the fully arc proof metal enclosed, free standing, floor
mounting, flush fronted type, consisting of modules assembled into one or more units. Each unit
is made of a cubicle sealed-for life with SF6 / VCB and contains all high voltage components
sealed off from the environment.
The overall design of the indoor switchgear should be such that front access only is required. It
should be possible to erect the switchboard against a substation wall, with HV and LV cables being
terminated and accessible from the front.
The units should be constructed from Minimum 2 mm thick stainless steel sheets. However,
Offer with type test report of pressure withstand test for gas filled compartment with pressure
relief device test as per cl. no. 6-103-1 of IEC 62271-200-2003 can be accepted for 2mm
stainless steel tank thickness. The design of the units should be such that no permanent or
harmful distortion occurs either when being lifted by eyebolts or when moved into position by
rollers.
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For outdoor RMUs a weather proofing process shall be carried out. SHEET METAL MUST BE
GRIT BLASED / THERMALLY SPRAYED AND POLYURETHANE PAINTED WITH ABOUT 70 MICRON
THICKNESSES, TO ACHIVE OUTDOOR WORTHINESS AND CORROSION PROOF NESS.
- RMU ENCLOSURE M U S T BE SHIELDED AGAINST SOLAR IRRADIATION AND T E S T E D FOR A
AMBIENT OF 45 DEGREE C WITHOUT DERATING OF THE EQUIPMENT. The cubicle should be have a
pressure relief device. In the rare case of an internal arc, the high pressure caused by the arc will
release it, and the hot gases is allowed to be exhausted out at the bottom / top / rear of the
cubicle. A controlled direction of flow of the hot gas should be achieved.
The switchgear should have the minimum degree of protection (in accordance with IEC 60529)
- IP 67 for the tank with high voltage components
- IP 2X for the front covers of the mechanism
- IP 3X for the cable connection covers
- IP 54 for the outdoor enclosure.
1.4
STANDARDS:
Unless otherwise specified elsewhere in this Specification, the RMU, Switchboard (Switchgear),
Load break isolators, Instrument Transformers and other associated accessories shall conform to
the latest revisions and amendments thereof to the following standards.
1. IEC 60 298/IEC 62 271-200/IS 12729:1988 - General requirement for Metal Enclosed Switchgear
2. IEC60129/IEC62271-102/IS 9921 - Alternating current disconnector’s (Load break isolators) and
earthing switch
3. IEC 62 271-100 & 200/IEC 60 056/IS 13118:1991 - Specification for alternating current circuit
breaker
4. IEC 62 271-1/IEC 60694 - Panel design, SF6/Vacuum Circuit Breakers
5. IEC 60044-1/IEC 60185/IS 2705:1992 - Current Transformer
6. IEC 60265/IS 9920:1981- High voltage switches.
7. IEC 376 - Filling of SF6 gas in RMU.
8. IEC 60273/IS: 2099 - Dimension of Indoor & Outdoor post insulators i. with voltage > 1000 Volts.
9. IEC 60529/IS 13947(Part-1)
- Degree of protection provided by
i. enclosures for low voltage switchgear and
ii. Control gear.
10. Indian Electricity Rules/IS Code
Equipment meeting with the requirements of any other authoritative standards, which ensures
equal or better quality than the standard mentioned above shall also be acceptable. If the
equipments, offered by the Bidder conform to other standards, salient points of difference
between the standards adopted and the specific standards shall be clearly brought out in relevant
schedule. In case of any difference between provisions of these standards and provisions of this
specification, the provisions contained in this specification shall prevail. One copy of such
standards with authentic English Translations shall be furnished along with the offer.(Hard copy)
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1.4.1 Applicable Standards
The RMUs shall be manufactured to the highest quality consistent with best practice and
workmanship and in full accord with the Supplier’s quality assurance plan. The RMUs shall
conform to the Indian or IEC international standards that are applicable. These include the
standards listed in Table 1Error! No text of specified style in document.-1 below.
Table 1Error! No text of specified style in document.-1: Applicable Standards
Standard
Description
IS 3427
AC metal enclosed switchgear and control gear for rated voltages above 1 kV and up
to and including 52 kV
IS 12063
Classification of degrees of protection provided by enclosures of electrical
equipment
IS 9920
(Parts 1 to 4)
High Voltage Switches
IS 9921
(Parts 1 to 5)
IS 13118
IS 10601
Specification for AC disconnectors and earthing switches for voltages above 1000 V
HV AC Circuit Breakers
Dimensions of terminals of HV Switchgear and Control gear
IS 12729
General requirements of switchgear and control gear for voltages exceeding 1000 V
IEC 1330
IEC 60694
IEC 6081
IS 2705
IS 3156
IS 8686
IEC 62271200
High voltage/Low voltage prefabricated substations
Common clauses for MV switchgear standards
Monitoring and control
Current Transformers
Voltage transformers
Specification for Static Protective Relays
Standards for high voltage metal clad switchgear up to 52 KV.
INDIAN
This is to be as per Central Electricity Authority (Safety Requirement for
ELECTRCIATY
Construction, Operation & Maintenance of Electrical Plants and Electric Lines)
REGULATION
Regulations, 2011
2011
1.5
THE STANDARDS MENTIONED ABOVE ARE AVAILABLE FROM:
IEC - (INTERNATIONAL ELECTRO-TECHNICAL COMMISSION, BUREAU CENTRAL DE LA COMMISSION,
ELECTRO TECHNIQUE INTERNATIONAL, 1, RUE DE VEREMBE, GENEVA, SWITZERLAND.)
ISO - INTERNATIONAL STANDARD ORGANISATION
1.6
SPECIFIC REQUIREMENTS IN RMU:-
1.6.1 CLIMATE CONDITIONS
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The climatic conditions under which the equipment should operate satisfactory are as under:
Maximum ambient air temperature
:40-45 deg. C
Minimum ambient air temperature
:10 deg.C
Maximum daily average ambient air temperature
:40 C
Maximum humidity
:100%
Altitude above M.S.L. (maximum)
:1000 metres
Average annual rainfall(mm)
:925
Max. wind pressure(Kg/sq.m)
:200
Seismic level(Horizontal accn.)
:0.3 g
Iso-ceraunic level(Days per Year)
:50
Average thunder storm days per annum
:50
1.6.2 Distribution Network Electrical Parameters
The main parameters of the distribution network are as follows:
1 Nominal system voltage:
11 kV (rms)
2 Highest system voltage:
12 kV (rms)
3 Number of phases:
3
4 Frequency:
50 Hz
5 Variation in frequency:
49.5 Hz to 50.5 Hz
6 Type of earthing:
Solid
7 Power frequency withstand voltage:
28 kV
8 Basic impulse withstand voltage
1.7
:
75 kV
RMU OUTDOOR METAL CLAD ENCLOSURE.
The RMU enclosure must be a metallic, it shall follows an industrialized process of manufacturing.
The RMU and combination shall be tropicalised and outdoor metal enclosed type. The RMU metal
parts shall be of high thickness, high tensile steel which must be grit/short blasted, thermally sprayed
with Zinc alloy, phosphate or should follow the 7 tank pre-treatment process and be subsequently
painted with polyurethane based powder paint. The overall paint layer thickness shall be not less
than 80 microns.
The rating of enclosure shall be suitable for operation on three phase, three wire, 11 KV, 50 cycles,
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A.C. System with short-time current rating of 20KA for 3 seconds for 11 KV with RMU Panels.
The enclosure should have two access doors one for the operation and relay monitoring and
other for the cable access. Both the doors should have the locking facility to prevent the access
to operating mechanism to avoid unauthorized operating of RMU and relay.
1.7.1 RMU Design Features
All design features of the proposed RMU, as described in the supplier’s bid and in the bid’s
reference materials, shall be fully supported by the equipment actually delivered. The key design
features include those that relate to:
Maintainability, expandability, and life span
Ability to operate in severe outdoor environmental conditions.
Immunity to electrical stress and disturbance.
Acceptable insulation properties.
Convenient FRTU interconnection features.
1. MODULAR DESIGN, PANEL TYPE WITH FRONT CABLE ACCESS.
2. RMU MUST BE MADE OF ROBOTICALLY / TIG / MIG WELDED STAINLESS STEEL.
3. Offered RMU must be extensible.
i. RMU Type Installation BOTH SIDES EXTENSIBLE Type.
1. Specification
•
Rated Voltage-12 KV.
•
Rated Power Frequency withstand voltage- 28 KV
•
Rated Lightening impulse withstand voltage-75 KV.
•
Rated Current for Ring Main Feeder- 630 A.
•
Rated Current for VCB Feeder- 630 A.
•
Rated short time current- 21 KA/3 Sec.
•
Rated short making current- 52 kA.
•
Ambient temperature- (-5 degree Celsius to +45 degree Celsius)
2. Scope of Supply
•
Each including Enclosure IP-54.
Each load break Switches includes
•
SF6 three position switches with position ON-OFF-EARTH.
•
Motor operated spring mechanism ON-OFF.
•
Mechanical indicators for position ON-OFF-EARTH.
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•
Mimic diagram at the front facia of RMU.
•
Socket for Capacitive Voltage Indicator
•
Padlocking facility.
Each Vacuum Circuit Breaker includes
•
Motorized VCB with position ON-OFF.
•
Manual Line disconnector with three positions switches ON-OFF-EARTH.
•
Auxiliary switches 4 NO + 4 NC with wiring
•
Self powered relay for Over current and earth fault protection.
•
Space for SCADA Unit.
3 Phase definite time over current, earth fault and short-circuit protection with variable
tripping times (ANSI 50/51), 3phase over current protection with selectable inverse time
characteristic and definite time short circuit current element. ( ANSI50/51),Definite time earth over
current and earth short circuit protection by internal calculations (ANSI 50N/51N),earth over current
protection with selectable inverse time characteristics and instantaneous short circuit current
element (ANSI 50N /51N) LV Current transformer compatible with self powered relay.
•
•
Socket for capacity voltage indicator
•
Padlocking facility.
•
24 V DC Battery
•
Battery charger
Inherently designed LT voltage transformer of suitable VA burden for LT supply voltage for
battery charger and protection.
•
•
Earthing of RMU as per IS 3043-1987.
•
HT metering panel as per relevant IS
ACCECORIES WITH EACH RMU Includes.
1. Operating handle- 1 No.
2. Right angle cable boots- 2 x sets.
3. Capacitor voltage indicator Type HR-ST Make Hortsmann or equivalent -1 Nos.
4. Potential free contacts and wiring for future communication and RTU provision.
5. Fault passage indicator for ring feeder.
6. Battery Backup for control supply.
7. All Cable termination kits at RMU side.
8. Ready for Service indicator. This should have facility that from the SCADA control room the
controller should be able to check the pressure of SF6 gas in the individual tank and the signals of
the readiness of the RMU)
NOTE: 3phase Potential transformer with voltage ratio of 11KV/110V for 11KV RMU. The PT shall be
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of cast resin construction and they shall confirm the IS-3156. Current transformer provided should
be with dry type with rating & ratio as per requirement of site situation & as per IEC 60185&
capable for measurement of current for connection & with protection/ relay circuit of RMU
OUT DOOR RMU
1.
Stainless steel enclosure for OUT DOOR RMU application.
The manufacturers shall
conform the normal current ratings mentioned in GTP at 45 deg. Ambient without derating or as
per IEC Standard
2. Enclosure with I.P.54 standard protection.
3. Offered RMU must be extensible.
4. Cable boxes shall be on Front sides.
5. RMU ENCLOSURE MUST BE SHIELDED AGAINST SOLAR IRRADIATION AND TESTED FOR
AMBIENT OF 45 DEGREE C. The manufacturers shall conform the normal current ratings mentioned
in GTP at 45 deg. Ambient without derating, however, design for higher ambient temperature than
45 degree may be admissible.
6. MODULAR DESIGN, PANEL TYPE WITH FRONT CABLE ACCESS.
7. RMU MUST BE MADE OF ROBOTICALLY / TIG / MIG WELDED STAINLESS STEEL.
8. Offered RMU must be extensible.
1.8 TAKE OFF TERMINAL UNITS FOR AUTOMATION:
The RMU should be provided with necessary take off terminal units for automations, located in the
front recesses / LV cubical of the RMU. The connectivity to the FRTU for SCADA purpose shall be
provided. Refer Annexure-1 for general arrangement of the terminals.
1.9 ISOLATORS (LOAD BREAK TYPE)
The load break isolators for Incoming and Outgoing supply must be provided. These should be fully
insulated by SF6 gas. The load break isolators shall consist of 630 Amp fault making/load breaking
spring assisted ring switches, each with integral fault making earth switches. The switch shall be
naturally interlocked to prevent the main and earth switch being switched “ON‟ at the same time.
The selection of the main and earth switch is made by a lever on the facia, which is allowed to
move only if the main or earth switch is in the off position. The load break isolators should have
the facility for remote operation. Each load break switch shall be of the triple pole,
simultaneously operated, automatic type with quick break contacts and with integral earthing
arrangement.
The isolating distance between the OFF and the ON position in the isolator should be sufficient to
withstand dielectric test as per IS/IEC, so as to have enough isolating distance for ensuring safety
during DC injection for Cable testing.
1.9.1 Load break switch should have the following
Motor operated 12 KV, 630A Load Break switch and manually operated Earthing Switch with making
capacity.
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“Live Cable” LED Indicators thru Capacitor Voltage Dividers mounted on the bushings.
Mechanical ON/OFF/EARTH Indication
Anti-reflex operating handle
Cable Testing facility without disconnecting the cable terminations, cable joints and terminal
protectors on the bushings. Cable terminations Cable boxes suitable for 1 X 3C x 300 sq mm XLPE
Cable with right angle Cable Termination Protectors.
1.10
EARTHING OF ISOLATORS AND BREAKER (EARTH SWITCH)
Necessary arrangements are provided at Load break isolators Breaker for selecting Earth position.
Mechanical interlocking systems shall prevent the RMU function from being operated from the
“ON” to “Earth On” position without going through the “OFF” position.
1.11
DISTRIBUTION TRANSFORMER/FEEDER BREAKER (VACUUM)
The VCB breaker for the controlling of DT/Feeder Breaker must be provided inside welded stainless
steel SF6 gas tank with the outdoor metal clad enclosure. The VCB circuit breaker must be a spring
assisted three positions with integral fault making earth switch. The selection of the main/earth
switch lever on the facia, which is allowed to move only if the main or earth switches is in the off
position.
The manual operation of the circuit breaker shall not have an effect on the trip spring. This should
only be discharged under a fault (electrical) trip; the following manual reset operation should
recharge the trip spring and reset the circuit breaker mechanism in the main off position.
The circuit breaker shall be fitted with a mechanical flag, which shall operate in the event of a
fault (electrical) trip occurring. The “tripped” flag should be an unambiguous colour differing from
any other flag or mimic.
Both the circuit breaker and ring switches are operated by the same unidirectional handle. The
protection on the circuit breaker shall comprise of the following components:- 3 class X protection CT‟s,
- a low burden trip coil and
- a self powered (No external DC or AC source required) IDMT protection relays (Numeric/Micro
processor based) 3 x over current and earth fault element shall be Definite Time type relay . The
protection system should be suitable for protecting transformers of rated power from 250 KVA on
wards. The relay should be housed within a pilot cable box accessible.
1.11.1 Circuit Breaker should have the following:
- Motor operated 200 A / 630A SF6 insulated Vacuum circuit breaker and Ear thing Switch with
making capacity
- Mechanical tripped on fault indicator
- Auxiliary contacts 4NO and 4NC
- Anti-reflex operating handle
- “Live Cable” LED Indicators thru Capacitor Voltage Dividers mounted on the bushings.
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- O/C + E/F self powered relay
- Shunt Trip circuit for external trip signal
- Mechanical ON/OFF/EARTH Indication
- Cable boxes suitable for 1 X 3C x 300 sq mm XLPE Cable with right angle Cable Termination /
protectors / boots
1.12 TECHNICAL DATA
1.12.1 Ring Main Unit, Electrical data
Electrical data and service conditions
Sr. No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Rated voltage
KV
Power frequency withstand voltage
KV
KV
Impulse withstand voltage
Rated frequency
Hz
Rated current busbars
A
Rated current (cable switch)
A
Rated current (T-off)
A
Breaking capacities:
active load
A
closed loop (cable switch)
A
off load cable charging (cable switch)
A
earth fault (cable switch)
A
earth fault cable charging (cable switch)
short circuit breaking current (T-off circuit
kA
Rated making capacity
kA
Rated short time current 3 sec.
kA
Ambient temperature:
Maximum value
°C
Maximum value of 24 hour mean
°C
Minimum value
°C
Altitude for erection above sea level4
m
Relative humidity
12/15.5 KV
28 / 35
75 / 95
50
630
630
200 / 630
630
630
135
200
115
20 / 21
52
20 / 21
+ 45
+ 40
0
...1000
Max 95%
1.12.2 Ring Main Unit Technical data (11KV/22KV)
No. General data, enclosure and dimensions
1 Standard to which Switchgear complies
2
Type of Ring Main Unit
3
4
5
6
Number of phases
Whether RMU is type tested
Whether facility is provided with pressure relief
Insulating gas
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IEC
Metal Enclosed, Panel type, Compact
Module.
3
Yes
Yes
SF6
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7
Nominal operating gas pressure
8
9
Gas leakage rate / annum
Expected operating lifetime
10
Whether facilities are provided for gas monitoring
11
Material used in tank construction
No.
1
2
3
4
5
6
7
8
9
Operations, degree of protection and colours
Means of switch operation
Means circuit breaker operation
Rated operating sequence of Circuit Breaker
Total opening time of Circuit Breaker
Closing time of Circuit Breaker
Mechanical operations of switch (co)
Mechanical operations of CO earthing switch
Mechanical operations of circuit breaker (co)
Principle switch / earth switch
Degree of protection:
High Voltage live parts, SF6 / VCB tank
Front cover mechanism
Cable covers
Outdoor Enclosure
Colours:
Front cover
Side and cable cover
10
11
12
13
14
15
1.4 bar @ 20° C. However offer with
Nominal operating gas pressure shall be as
per manufacturer standard and suitable to
satisfy the rated dielectric strength can be
accepted
0.075%
30 years
Yes, temperature compensated manometer
can be delivered
Stainless steel sheet, minimum 2 mm
separate handle
separate handle and push buttons
O - 3min-CO-3min-CO
approx. 45ms
approx. 40ms
1000
1000
2000
3 position combined switch / earth switch
IP 67
IP 2X
IP 3X
IP 54
1.13 BUSHINGS
The units are fitted with the standardized bushings that comply with IEC standards. All the
bushings are the same height from the ground and are protected by a cable cover.
1.14 CABLE BOXES
All the cable boxes shall be air insulated suitable for dry type cable terminations and should have
front access. The cable boxes at each of the two ring switches should be suitable for accepting HV
cables of sizes 3c x 300 sq.mm and circuit breaker cable suitable up to 3c x 300 sq.mm. The cable
boxes for an isolator in its standard design should have sufficient space for connecting two cables
per phase .Necessary Right angle Boot should be supplied to the cable terminations .The type of
the Right angle Boot should be cold applied insulating Boot.
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1.15 CABLE TESTING FACILITY
It shall be possible to test the cable after opening the cable boxes. The cable boxes should open only
after operation of the earth switch. Thus ensuring the earthing of the cables prior to performing the
cable testing with DC injection.
1.16 VOLTAGE INDICATOR LAMPS AND PHASE COMPARATORS
The RMU shall be equipped with a voltage indication to indicate whether or not there is voltage
on the cable. There should be a facility to check the synchronization of phases with the use of
external device. It shall be possible for the each of the function of the RMU to be equipped with a
permanent voltage indication as per IEC 601958 to indicate whether or not there is voltage on the
cables.
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1.17 EXTENSIBLE (BOTH SIDES)
Each combination of RMU shall have the provision for extension by load break isolators /
breakers in future, with suitable accessories and necessary Bus Bar. The equipment shall be
well designed to provide any kind of extension / trunking chamber for connecting and housing
extensible Busbars. Extensible isolators and circuit breakers shall be individually housed in
separate SF6 gas enclosures. Multiple devices inside single gas tank / enclosure will not be
acceptable. In case of extensible circuit breakers, the Breaker should be capable of necessary
short circuit operations as per IEC at 20 KA, and the Breaker should have a rated current carrying
capacity of 200 A to 630 A.
1.18 WIRING & TERMINALS:
The wiring should be of high standard and should be able to withstand the tropical weather
conditions. All the wiring and terminals (including take off terminals for future automation,
DC, Control wiring), Spare terminals shall be provided by the contractor. The wiring cable
must be standard single-core non-sheathed, Core marking (ferrules), stripped with nonnotching tools and fitted with end sleeves, marked in accordance with the circuit diagram
with printed adhesive marking strips.
The wiring should be of high standard and should be able to withstand the tropical weather
conditions. All wiring shall be provided with single core multi-strand copper conductor wires with
P.V.C insulation.
The wiring shall be carried out using multi-strand copper conductor super flexible PVC
insulated wires of 650/1100V Grade for AC Power, DC Control and CT circuits. Suitable colored
wires shall be used for phase identification and interlocking type ferrules shall be provided at
both ends of the wires for wire identification. Terminal should be suitably protected to
eliminate sulphating. Connections and terminal should be able to withstand vibrations. The
terminal blocks should be stud type for controls and disconnecting link type terminals for CT
leads with suitable spring washer and lock nuts.
Flexible wires shall be used for wiring of devices on moving parts such as swinging Panels (Switch
Gear) or panel doors. Panel wiring shall be securely supported, neatly arranged readily
accessible and connected to equipment terminals, terminal blocks and wiring gutters. The
cables shall be uniformly bunched and tied by means of PVC belts and carried in a PVC carrying
trough.
The position of PVC carrying trough and wires should not give any hindrance for fixing or
removing relay casing, switches etc., Wire termination shall be made with solder less crimping
type of tinned copper lugs. Core identification plastic ferrules marked to correspond with panel
wiring diagram shall be fitted with both ends of each wire. Ferrules shall fit tightly on the wire
when disconnected. The wire number shown on the wiring shall be in accordance with the
IS.375.
All wires directly connected to trip circuits of breaker or devices shall be distinguished by
addition of a red color unlettered ferrule.
Inter-connections to adjacent Panels (Switch Gear) shall be brought out to a separate set of
Terminal blocks located near the slots or holes to be provided at the top portion of the
panel. Arrangements shall be made for easy connections to adjacent Panels (Switch Gear) at
site and wires for this purpose shall be provided and bunched inside the panel. The bus wire
shall run at the top of the panel.
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Terminal block with isolating links should be provided for bus wire. Ateast 10% of total
terminals shall be provided as spare for further connections. Wiring shall be done for all the
contacts available in the relay and other equipment and brought out to the terminal blocks for
spare contacts. Color code for wiring is preferable in the following colours.
Voltage supply :
Red, Yellow, Blue for phase and Black for Neutral
CT circuits
:
similar to the above
DC circuits
:
Grey for both positive and negative
250V AC circuits :
Earthing
Black for both phase and neutral
:
Green
The wiring shall be in accordance to the wiring diagram for proper functioning of the connected
equipment. Terminal blocks shall not be less than 650V grade and shall be piece-molded type
with insulation barriers.
The terminal shall hold the wires in the tight position by bolts and nuts with lock washers. The
terminal blocks shall be arranged in vertical formation at an inclined angle with sufficient space
between terminal blocks for easy wiring.
The terminals are to be marked with the terminal number in accordance with the circuit
diagram and terminal diagram. The terminals should not have any function designation and are
of the tension spring and plug-in type.
Clear empty Space shall be mandatorily provided in RMU Panel for mounting FRTU Panel.
Dimensions details of required space for FRTU are about 1500 mm H x 600 mm W x 300 mm D.
230V AC Supply for charging of FRTU battery should be available. The Aux supply will be taken
through the PT provided for metering in RMU. We require 230V AC and not 110V AC. FRTU
will require power up to 500 VA depending upon RMU configuration. The PT must have
sufficient burden for meeting the aforesaid requirement also for battery charging.
1.19 EARTHING
The RMU outdoor metal clad, Switch Gear, Load break isolators, Vacuum circuit breakers shall
be equipped with an earth bus securely fixed along the base of the RMU.
The size of the earth bus shall be made of IEC/IS standards with tinned copper flat for
RMU and M.S. Flat for Distribution Transformer, earth spike and neutral earthing.
Necessary terminal clamps and connectors shall be included in the scope of supply.
All metal parts of the switchgear which do not belong to main circuit and which can collect
electric charges causing dangerous effect shall be connected to the earthing conductor made
of copper having CS area of minimum 75 mm. Each end of conductor shall be terminated by M
12/equivalent quality and type of terminal for connection to earth system installation. Earth
conductor location shall not obstruct access to cable terminations.
The following items are to be connected to the main earth conductor by rigid or copper
conductors having a minimum cross section of 75 mm (a) earthing switches (b) Cable sheath or
screen (c) capacitors used in voltage control devices, if any.
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The metallic cases of the relays, instruments and other panel mounted Equipment’s shall be
connected to the earth bus by independent copper wires of size shall be made of IEC/IS
standards. The colour code of earthing wire shall be green. Earthing wires shall be connected
on the terminals with suitable clamp connectors and soldering shall not be permitted.
1.20 ACCESSORIES & SPARES:
The following spares and accessories shall be supplied along with the main equipments at free
of costs. This shall not be included in the price schedule.
1. Charging lever for operating load break isolators & circuit breaker of each RMU.
2. The pressure gauges indications - 1 numbers
Provision shall be made for padlocking the load break switches/ Circuit breaker, and the
earthing switches in either open or closed position with lock & master key.
1.21 TESTING OF EQUIPMENT & ACCESSORIES:
Provision for testing CTs, PTs, Relays, Breakers and Cables shall be made available.
Procedure and schedule for Periodical & Annual testing of equipments, relays, etc. shall be
provided by the supplier.
1.21.1 TYPE TEST
The Tenderers should, along with the tender documents, submit copies of all Type test
certificate of their make in full shape as confirming to relevant ISS/IEC of latest issue obtained
from a International/National Govt. Lab/Recognized laboratory.
The above type test certificates should accompany the drawings for the materials duly signed
by the institution who has type test certificate. The details of type test certificate as per Schedule
F.
1.21.2 ACCEPTANCE AND ROUTINE TESTS
All acceptance and routine tests as stipulated in the latest IEC- shall be carried out by the
supplier in the presence of DGVCL’s representative. The supplier shall give at least 7 days
advance intimation to the DGVCL to enable them to depute their representative for witnessing
the tests. The partial discharge shall be carried out as routine test on each and every completely
assembled RMU gas tank and not on a sample basis. As this test checks and guarantees for the
high insulation level and thus the complete life of switchgear.
1.21.3 ADDITIONAL TESTS
The DGVCL reserves the right for carrying out any other tests of a reasonable nature at
the works of the supplier/laboratory or at any other recognized laboratory/research institute in
addition to the above mentioned type, acceptance and routine tests at the cost of the Board
to satisfy that the material complies with the intent of this specification.
1.21.4 PRE-COMMISSIONING TESTS
All the pre-commissioning tests will be carried out in the presence of the DGVCL’s testing
engineer and necessary drawing manual and periodical test tools shall be arranged to be
supplied.
During the above tests the contractor representative should be present till the RMUs are put in to
service.
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1.22 INPSCTION:
The inspection may be carried out by the DGVCL at any stage of manufacture. The supplier shall
grant free access to DGVCL’s representative at a reasonable time when the work is in
progress. Inspection and acceptance of any equipment under this specification by the DGVCL
shall not relieve the supplier of his obligation of furnishing equipment in accordance with the
specification and shall not prevent subsequent rejection if the equipment is found to be
defective.
The supplier shall keep the DGVCL informed in advance, about the manufacturing programme so
that arrangement can be made for inspection. The DGVCL reserves the right to insist for
witnessing the acceptance/routine testing of the bought out items. The DGVCL has rights to
inspect the supplier’s premises for each and every consignment for type & routine test.
No material shall be dispatched from its point of manufacture unless the material has been
satisfactorily inspected and tested / unless the same is waived by the DGVCL in writing.
The good/equipments/ materials shall be dispatch first form manufacturer place to RSO Navsari of
DGVCL. From RSO Navsari the material will be re-issued to contractor for execution at work site.
1.22.1 : QUALITY ASSURANCE PLAN:
The bidder shall invariably furnish following information along with his offer / in case of event of
order. I. Statement giving list of important raw materials including but not limited to
a) Contact material b) Insulation
c) Sealing material
d) Contactor, limit switches, etc. in control cabinet.
Name of sub-suppliers for the raw materials, list of standards according to which the raw
materials are tested, list of test normally carried out on raw materials in presence of Bidder’s
representative, copies of test certificates.
II. Information and copies of test certificates as in (I) above in respect of bought out accessories &
raw materials. III. List of areas in manufacturing process, where stage inspections are to be carried
out.
IV. Normally carried out for quality control and details of such tests and inspections. V. Special
features provided in the equipment to make it maintenance free.
VI. List of testing equipment available with the Bidder for final testing of RMUs and associated
combinations vis-à-vis the type, special, acceptance and routine tests specified in the relevant
standards. These limitations shall be very clearly brought out in the relevant schedule i.e.
schedule of deviations from specified test requirements. The supplier shall, within 15 days from
the date of receipt of Purchase Order submit following information to the DGVCL.
a) List of raw materials as well bought out accessories and the names of sub-suppliers selected
from those furnished along with offer.
b) Necessary test certificates of the raw material and bought out accessories.
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c) Quality Assurance Plan (QAP) with hold points for DGVCL’s inspection. The quality assurance
plan and hold points shall be discussed between the DGVCL and supplier before the QAP is
finalized.
The supplier shall submit the routine test certificates of bought out items and raw material, at the
time of routine testing of the fully assembled breaker.
1.23 TRAINING:
The supplier shall give rigorous training to the engineers & staff for 2 days in attending
trouble shooting and maintenance.
1.24 SCADA CONNECTIVITY:
Provision shall be made in all the RMUs with necessary take off terminal units for automations
and connectivity with FRTU. The all RMUs shall be motorized type and compatible for SCADA
operation. All the I/O signals need to be brought to the Terminal Strip on a Din Rail, also the
Din Rail should have space to mount the MFT’s provi ded by SIA. The entire DI’s, AI’s and DO’s
should be provided as potential free and control contacts. The CT/PT should provide metering
grade core for connecting MFT provided with FRTU. The RMU will also supply 230VAC 500VA for
FRTU. Refer Annexure-1.
The RMU should be provided with provision of following minimum signals available at separate
SCADA terminal box.
Minimum signals for SCADA/DMS - to be wired to Separate TBs
CB close / open
potential free contacts
LBS close / open
potential free contacts
LBS & CB Earth Switch close /open
potential free contacts
CB Test/Service Position
potential free contacts
Spring charge Status indication
potential free contacts
SF6 gas pressure low
potential free contacts
O/C Operated
potential free contacts
E/F Operated
potential free contacts
Local/Remote
potential free contacts
Common Power Supply Healthy
potential free contacts
Motor MCB Healthy Status
potential free contacts
Battery charger Fail
potential free contacts
RMU Door Open
potential free contacts
CB Trip Coil Healthy
potential free contacts
CT & PT
For SCADA Metering
FPI Control
FPI remote resetting for SCADA
CB control
Control from SCADA
LBS Control
Control from SCADA
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1.25 DOCUMENTATION and DRAWINGS
All drawings shall conform to relevant International Standards Organization (ISO) Specification. All
drawings shall be in ink and suitable for microfilming.
The tenderer shall submit along with his tender dimensional general arrangement drawings of
the equipments, illustrative and descriptive literature in triplicate for various items in the RMUs
which are all essentially required for future automation.
I. Schematic diagram of the RMU panel
II. Instruction manuals
III. Catalogues of spares recommended with drawing to indicate each items of spares
IV. List of spares and special tools recommended by the supplier.
V. Copies of Type Test Certificates as per latest IS/IEC.
VI. Drawings of equipments, relays, control wiring circuit, etc.
VII. Foundation drawings of RMU and D.T. Structure.
VIII. Dimensional drawings of each material used for item VII.
IX. Actual single line diagram of RMU/RMUs with or without Extra combinations shall be made
displayed on the front portion of the RMU so as to carry out the operations easily. The following
should be supplied to each consignee circle/town along with the initial supply of the
equipments ordered.
a. Copies of printed and bound volumes of operation, maintenance and erection manuals in
English along with the copies of approved drawings and type test reports etc.
b. Sets of the manuals as above shall be supplied to the Chief Engineer/Distribution. A soft copy
of the all Technical and Drawing furnished in a CD
1.26 NAME PLATE:
Each RMU and its associated equipments shall be provided with a nameplate legible and indelibly
marked with at least the following information.
a. Name of manufacturer
b. Type, design and serial number c. Rated voltage and current
d. Rated frequency
e. Rated symmetrical breaking capacity f. Rated making capacity
g. Rated short time current and its duration h. Purchase Order number and date
i. Month and Year of supply
j. Rated lighting impulse withstand voltage
k. Feeder name (Incoming and Outgoing), DTs Structure name, 11000 Volts Dangers etc.
NOTE:
I) THE WORD RATED NEED NOT APPEAR ON THE NAME PLATE. RECOGNIZED ABBREVIATIONS
MAY BE USED TO EXPRESS THE ABOVE PARTICULARS.
II) WHETHER THE CIRCUIT BREAKER IS FITTED WITH CLOSING/TRIPPING DEVICES NECESSITATING
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AN AUXILIARY SUPPLY SHALL BE STATED EITHER ON THE CIRCUIT BREAKER NAME PLATE OR ANY
OTHER ACCEPTABLE POSITION.
1.27 FAULT PASSAGE INDICATORS (FPI):
These shall facilitate quick detection of faulty section of line. The fault indication may be on
the basis of monitoring fault current flow through the device. The unit should be self-contained
requiring no auxiliary power supply. The FPI shall be integral part of RMU. The FPI shall have
LCD/LED display, automatic reset facility. FPI Reset from SCADA will be through momentary
closureof a potential free contact from FRTU.
The sensors to be bushing mounted. The number of FPI should be put in all the three phases of the
outgoing branch of the RMUs
FPI should have suitable connectivity with the FRTUs for the SCADA purpose.
The FPI inside the RMU may be non communicable and hard wired to the TB for the signals
Fault Passage indicator OK
Fault Passage indicator operated
1.28 TROPICALISATION
Due regard should be given to the climatic conditions under which the equipment is to work.
Ambient temperatures normally vary between 20 deg C and 40 d e g C, although direct sun
temperature may reach 45 deg C. The climate is humid and rapid variations occur, relative
humidity between 60% and 95% being frequently recorded, but these values generally correspond
to the lower ambient temperatures. The equipment should also be designed to prevent ingress of
vermin, accidental contact with live parts and to minimize the ingress of dust and dirt. The use of
materials which may be liable to attack by termites and other insects should be avoided.
1.29 MOTORIZATION:
All the functions within the RMU i.e Isolators/Breakers should be fitted with motor mechanism and
closing coil making it suitable to make it on from remote.( However, manual mechanism should be
possible in case of failure/ non working of motor)
Other Accessories (required with RMU):a) Shunt Trip Coil ( Coil voltage shall be indicated later on)
b) Battery & Battery Charger.
c) 4NO+4NC auxiliary contacts.
1.30 METERING:
Multifunction Energy meter shall be provided by DGVCL, of accuracy class of 0.5s at incoming
isolator of all RMUs. The Metering CTs and PTs of suitable rating shall be provided and wired in
SCADA terminal TBs by the bidder.
1.31 TECHNICAL SPECIFICATION FOR RMU
1.31.1 11KV Bus Bar
I.
Current Carrying Capacity
: 630 Amps.
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II.
Short time rating current for 3 secs.
: 20 KA for 11kv
III.
Insulation of bus bar
: SF6
IV.
Bus bar connections
: Anti-oxide grease
1.32
PARAMETERS FOR SWITCH GEAR OF DT AND LOAD BREAK ISOLATORS
I.
Type
: Metal enclosed
II.
No of Phases
:3
III.
No. of poles
:3
IV.
Rated voltage
:12 KV
V.
Operating voltage
:11 KV(+10% to -20%)
VI.
Rated lightning impulse withstand voltage
:75 KV
VII.
Rated power frequency withstand voltage
:28 KV
VIII.
Insulating gas
:SF6
IX.
Rated filling level for insulation
:As Per IEC.
Max. Permissible site altitude at the above gas pressures
: 1000m
(The operating pressure has to be adjusted for greater altitudes)
Isolating distance between ON and OFF position in isolator
short time current
:20 KA.for 11kv
Rated short time
:3s
Rated peak withstand current
:50 KA.
No of operations in Short circuit
:15 Nos (minimum)
:80 mm (min). Rated
Operating mechanism: Circuit breaker with spring assisted anti reflex mechanism. Rated
current (Bus):
:630 A
Rated current (breaker)
:200 A
Circuit Breaker interrupter
:SF6 insulated VCB Rated
frequency
: 50 Hz
Rated operating sequence
:O-3min- CO
Number of mechanical/Remote operations for earthing: As per IEC
& Ring switches & Number of mechanical/ remote operations for circuit breakers 60298
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1.33 PRINCIPAL FEATURES
Sr. No.
DESCRIPTION
Breaker
1
2
3
4
Circuit label
Mimic diagram
Supply voltage indication
Current Transformer
Self Powered based Microprocessor based IDMT
Relay (3OL)/EL
Anti - Reflexing Relay
Interlock to defeat the operation of the line side earthing when
the line side isolator is ON.
Yes
Yes
Yes
Yes
5
6
7
Yes
Yes
Yes
9
Interlock to defeat the operation of the earthing when the
breaker is in service position and is ON.
Breaker ON/OFF indication
10
Spring Charge indication / Spring assisted mechanism.
Yes
11
12
Fault Tripping indication
Bus bar end caps
Whether the SF6 gas pressure gauge indicator and
filling arrangement.
Yes
Yes
8
13
Yes
Yes
Yes
14
Whether the spring assisted mechanism with operating handle
for ON/OFF.
Yes
15
Whether the earth positions with arrangement for
padlocking in each position and independent manual
operation with mechanically operated indicator are
provided
Yes
16
RMUs are provided with necessary take off terminals for future
automation.
Yes
1.34 Earthing switch for 11 KV Line side Isolation and DT
Rated short time current
: 20 KA.for 11kv.
Rated short time
:3s
Rated peak withstand current
:50 KA Interlocking facility:
1) Between 11 KV Line side isolator “ON”&Earthing.
2) Between 11 KV DT side breaker on close condition &earthing
1.35
Current Transformers for breaker
CT Type
: Tape wound
CT Description: The CTs of breaker shall be Suitable for sensing the minimum primary variable
current in the order of 10-100 A and the secondary current for the CT is 1 A.
The CT shall be housed in outside SF6 chamber for testing and Maintenance
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Accuracy Class : class X/5P10 protection
Rated burden : Suitable for self powered relay and metering.
1.36 TRAINING:
All successful tenderer for RMU shall provide training facility for DGVCL’s engineers. The training
shall be for not less than 4 man weeks for operation and maintenance of RMU. Syllabus and other
details of the training shall be finalized in consultation with the DGVCL. Boarding, lodging and
travel expenses for deputed trainees shall be borne by DGVCL. Charges for training shall be
quoted by in the offer separately. This will not be considered for evaluation of the offer.
SCHEDULE -A
GUARANTEED TECHNICAL PARTICULARS OF RMUs (Technical Data Sheet)
SR.
NO.
OFFERED BY
BIDDER.
DESCRIPTION
1
SWITCHGEAR ASSEMBLY
1
Make
2
Type
3
reference Standard
4
Voltage (normal/Max) kv.
5
phase (Nos.)
6
Frequency (HZ)
7
Short Circuit rating
a) Breaking Symmetrical (KA)
b) Breaking Asymmetrical (KA)
c) Short Time for 1 Sec.
d) Short time 3 Sec.
8
Insulation Level
a) Impulse withstand (KV peak)
b) 1 Minute 50 HZ Voltage with st5and (KV rms)
9
Metal clad Construction
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10 Degree of protection:
11 Switchgear completely wire and tested at Factory.
2
CONSTRUCTION
Overall Dimensions
A
Breaker
i) Length (MM)
ii) Bredth (MM)
iii) Height (MM)
B
Isolator
i) Length (MM)
ii) Bredth (MM)
iii) Height (MM)
C
Total Extensible 3 Panel RMU
I) Width (W) (mm)
ii) De(t) (D) (mm)
D
Weight
a) Breaker (Kg)
b) Isolator (KG)
c) Extensible 3 Panel RMU (Kg)
d) Heaviest Package (Kg)
3
BUS BAR
Make
Material & Grade
Reference Standard
4
a) Cross Sectional area (mm2)
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b) Size (mm2)
5
Continuous Current
a) Standard
b) At site conditions and within cubicle
6
Maximum temperature rise over ambient ©
Short time current for 1 Sec (KA rms)
Minimum clearance from bare bus bar connection
a) Phase to phase (mm)
b) Phase to Earth (mm)
9
Bus bar provided with
a) Insulator Sleeve
b) Case Resin Shrouds for joints
10 Bus bar connection
a) Silver plate
b) Made with anti-oxide grease
11 Bus bar support spacing (mm)
Bus support insulator
a) Make
b) Type
c) Reference standard
d) Voltage class (KV)
e) Minimum creepage distance (mm)
f) Cantilever Strength Kg/mm2)
g) Net Weight (KG)
13 Sf gas pressure (Filling pressure at 20 deg. C)
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5
ISOLATORS
1
Make
2
Type
3
Reference Standard
4
Rated Voltage (KV)
5
Rated frequency HZ)
6
No. of poles (No.)
7
Rated current
Normal (Standard) (Amps)
Derated (Site) Amp.
8
Maximum temperature rise over ambient Deg. C
9
Rated operation duly
10 Rupturing Capacity at Rated Voltage MVA
11 Rated making current KA peak
12 Short time current.
a) For 2 Sec KA rms.
b) For 3 Sec. KA rms.
13 Impulse Voltage withstand on 1/50 full wave
14 Maximum over voltage factory when switching off.
a) Loaded feeder cable
15 Maximum SF6 Gas pressure required?
16 No. of isolator operation permissible without requiring inspection
replacement of contacts and other main parts
At 100% rated current
At 100% rated breaking current.
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2
Isolator
Type
Materials
Dimensions
Size
Height of cCable box from ground level
Arrangement for supplying bus end cable box furnished for
extensible ring main Unit
Arrangement for mounting an extra cable box on each equipment
furnished.
6
NAME PLATE
1
Material
Thickness
Size for
Breaker Cubicle
Instruments/Devices
7
PAINTING
1
Finish of Breaker
Inside
Outside
2
Finish of Isolator
Inside
Outside
8
NO. OF ACCESSORIES FURNISHED
1
Earthing 3equi8pment
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2
Test Plust
3
Tests
4
Reference Standard
5
Routine Test to be performed on Switchgear
6
Type test quoted
9
DRAWING / DATE
1
General arrangement for Penal; Board
2
Foundation plan
3
SF6/VCB tripping and material schematic
4
Bill of material
5
SF6/VCB LT panel wiring diagram
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2.0
LIST OF APPROVED MAKES OF
EQUIPMENTS AND ACCESSORIES FOR
PROPOSED TURNKEY PROJECT
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Sr.
No.
1
Particulars
RING MAIN UNIT
Makes /Suppliers
Crompton
Greaves/C&S/Siemens/ABB/Schnieder/Easun
Reyrolle approved vendors of DGVCL.
2
XLPE Cables
Torrent Cables, Hindustan Vidyut Diamonds
cables, Apar Industries, Havell’s, KEI industries,
Paramount & other approved vendors of
DGVCLs/GETCO/GSECL of GUVNL.
3
LT Cables
Torrent Cables, Hindustan Vidyut Diamonds
cables, Apar Industries, Havell’s & other
approved vendors of DGVCLs/GETCO/GSECL of
GUVNL.
4
Mini Section Pillar (MSP)
Sintex Industries or any other approved vendor of
DGVCLs/GETCO/GSECL of GUVNL.
5
Fuse Section Pillar (FSP)
Sintex Industries or any other approved vendor of
DGVCLs/GETCO/GSECL of GUVNL.
6
End terminal Kit
7
HRC Fuses
8
Cable Glands
9
Lugs
10
G.I. Pipes
11
Any other
accessories/Material
UNCIL, Rychame, Bensons, Densons , M-seal
Havell’s or any other equivalent brands.
HME, EEW or any other IS
Dowells
Tisco, Sail, Damodar, Zenith & Shivdurg
Must be IS marked and approved vendors
%%%%%%%%%%
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