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SCHEDULE-III (PART-A)
TECHNICAL SPECIFICATION FOR 12 KV OUTDOOR VACUUM
CIRCUIT BREAKER KIOSKS AGAINST TN-2064
1.0
SCOPE
This specification is intended to cover the design manufacture, assembly,
testing at manufacturer's works, supply, delivery of 12 kV Vacuum Circuit
breaker Kiosks with current transformers, Potential transformers, protection
relays, metering instruments etc.
Complete
with all materials and
accessories
and installation & commissioning by the supplier as per
Schedule-III (Part-B) for efficient and trouble free operation (Separate price for
Installation & Commissioning and Civil works).
1.1
It is not the intent to specify completely herein all details of the design and
construction of equipments. However, the equipment shall conform in all respects
to high standards of engineering, design and workmanship and shall be capable of
performing in continuous commercial operation upto the Bidder's guarantee in
a manner acceptable to the Purchaser, who will interpret the meanings of
drawings and specifications and shall have the power to reject any work or
material which in his judgment is not in accordance therewith. The offered
equipment shall be complete with all components necessary for its effective and
trouble free operation along with associated equipments, interlocks, protection
schemes etc. Such components shall be deemed to be within the scope of
supply, irrespective of whether those are specially brought out in this
specification and/or the commercial order or not.
2.0
STANDARDS
The 12 KV vacuum circuit breaker Kiosks shall conform to latest revisions with
amendments of standards as under unless specified otherwise. Equipment meeting
any other authoritative standard which ensure equal or better quality than
the standard mentioned above will also be acceptable. In such cases a copy of
standard (English version) adopted, should be enclosed with the tender.
IEC56/IS:13118/IS-3427
IS: 3156
IS: 2705
IS: 3231
IS:1248
IS:14697-1999
Circuit
Breaker/
metal
enclosed
Switchgear
and control gear.
Voltage transformers.
Current transformers.
Electrical Relays for power system.
Meters and Instruments
Specification for AC static transformer operated watt
hour and VAR hour meters class 0.2 S & 0.5 S.
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IEC-62053-22-2003
IEC-62052-11-2003
CBIP Technical Report
No.88 revised July,
1996 read with
amendment issued
(April,99, September,99
and also any other
amendment thereafter).
Specification for AC Static Watt hour Meters, class 0.2
S & 0.5 S.
Specification for AC Static Electrical Energy Meter.
3.0 CLIMATIC CONDITIONS:
Equipment to be supplied against this specification shall be suitable for
satisfactory continuous operation under the following tropical conditions :i)Peak ambient air temperature
in shade.
ii) Minimum ambient air temperature
in shade
iii) Maximum relative humidity.
iv)Minimun relative humidity
50 DEG C
(-) 5 DEG C
95 %
10 %
v)Dust storms are liable to occur from the period
March to July
vi) Height above mean sea level
vii) Average number of thunder
storms days per annum.
viii) Average annual rainfall
ix)
Number of months of tropical
monsoon conditions p.a.
less than 1000M
40 DAYS
10-100 cm
(Depending on area)
4
4.0 PRINCIPAL PARAMETERS OF CIRCUIT BREAKERS
4.1
TYPE AND RATING
4.1.1 Type
12 kV
Vacuum circuit breaker
4.1.2 Service
4.1.3 Pole
4.1.4 Rated voltage
(nominal/max.)
4.1.5 Rated frequency
Outdoor
3
11/12 kV
50 HZ
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4.1.6 System Neutral
earthing
Effectively
grounded.
4.1.7 INSULTATION LEVEL
4.1.7.1 Impulse withstand
75 kVp
4.1.7.2 One minute power
frequency withstand
voltage.
35 kV rms
as per IS-3427
4.1.8 Rated Current
o
4.1.8.1 Continuous at 50 C.
630 A
4.1.8.2 Short time current
for 3 Sec.
4.1.9
16 kA
Rated Breaking Capacity
4.1.9.1 Symmeterical
4.1.9.2 Asymmeterical
16 kA
As per relevant standard
4.1.10
Rated making capacity
2.50X16 KA
4.1.11
Rated short time withstand current 3 secs.
16 KA
4.1.12
Total break time
5 cycles(Max.)
4.1.13
Creepage distance
300 mm
or more
4.1.14
Protection class of kiosk
IP-55 as per
IEC 529
4.1.15
Operating duty
For gang operation
4.1.16
Operating Mechanism
4.1.17
Spring charging Motor
4.1.17.1 Heater/Lamp/Socket.
4.1.18
O-3min-CO-3min-CO
motor operated spring
charged closing
mechanism or Magnetic
Actuator.
220V-240V
240V AC
Terminal Connector
4.1.18.1 Type
Bimetallic
clamp type/
Al. alloy.
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4.1.18.2 Suitable for
ACSR conductor
10% Panther and 90%
Dog Conductor
4.2
System details
4.2.1
H.V. System
Voltage (Nominal/Max.)
11/12 kV
Phases
3
System Neutral
Effectively
earthed.
Fault level
16 KA r.m.s.
Symmetrical
4.2.2
Auxiliary power Supply
4.2.2.1
A.C. Supply
1. 415 volts 3 ph 4 W 50 Hz
2. 240V 1 Ph 2 W 50 Hz
5. GENERAL TECHNICAL REQUIREMENTS:5.1
DESIGN CRITERIA
The bidder shall quote 12 KV Outdoor VCB Kiosks conforming to M-2 class
only. The equipment will be used in high voltage system
having
characteristics as
listed in the specification. The equipment will be installed
outdoor in a hot, humid and tropical atmosphere. All equipment, accessories and
wiring shall have tropical protection, involving special treatment of metal and
insulation against fungus, insects and corrosion.
The maximum temperature in any part of the equipment at specified rating shall
not exceed the permissible limits as stipulated in the relevant standards.
The equipment shall be capable of withstanding the dynamic and thermal
stresses of listed short circuit current without any damage or deterioration.
The safety clearances of all live parts of the equipment shall be as per relevant
standards.
5.2
SPECIFIC REQUIREMENTS
5.2.1 The vacuum circuit breaker kiosk shall be for outdoor installation. The duty of
the circuit breaker shall involve satisfactory interruption of short circuit currents
as listed in the specification. The breaker shall be capable of interruption of
low reactive current (lagging/leading) without undue over voltage.
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5.2.2
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CONSTRUCTIONAL FEATURE
5.2.2.1
The circuit breakers shall be triple pole horizontal draw out/ fixed type
enclosed in Kiosk of CRCA sheet steel of 3 mm thickness for load bearing members
and 2 mm thickness for non-load bearing members and shall comply with
latest edition of IS:13118/3427/IEC-56. The Kiosk shall be vermin proof and
dust tight. The switchgears and
Control
gears
shall
be complete
with all necessary
supporting
frame works,
Nuts and bolts etc. for
securing the same to
the floor. The operating
mechanism shall operate
(close/open)
all
the
three
phases simultaneously. The operating
mechanism links etc. should be accessible
for maintenance.
Mechanical
safety shutters should be provided between the breakers and panel. The
circuit breakers and its operating mechanism shall be fully interlocked to
prevent mal-operation. All the breakers shall be supplied with
necessary
clamps and connectors
suitable for
appropriate
current ratings. Rigid
type bimetallic/Al.alloy terminal connectors
of
630 Amps. current rating
form part of supply. Suitable arrangement of earthing the switchgears shall
be provided. All the connecting bus bars shall be made of copper.
5.2.2.2
Switchgear (Vacuum Circuit breakers etc.)and control gear (CTs.,PTs, relays
etc.)shall be mounted on
the
same Kiosk. Bus bars
shall be air
insulated
with
PVC
insulation/sleeves
on electrostatic
powder
coating. The bus bars should be of electrolytic copper with permissible
limits of current density. Size of the
bus bars and current density
should be specified in the tender. The bus bars conductor shall conform to
Indian standard 8084 and 3427 and shall be rated for 630 A,STC 16 KA for 3 sec.
5.2.2.3
All the meters, instruments, relays etc. shall be mounted
on
the
switchgear kiosk. The outdoor circuit breakers Kiosk shall be suitable for AC
series tripping arrangement.
5.2.2.4
The Kiosk shall have an arrangement for emergency shunt tripping from
remote place in addition to arrangement for local emergency tripping(Mechanical).
The kiosk shall also have a system to check the "Trip circuit healthy check"
in all the three phases. Necessary trip and closing coils shall be provided for
operation of the breakers.
5.2.2.5
All the six terminals shall be
bushings.
brought out
through appropriate class
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5.2.2.6
The arcing contacts shall be made of homogenious special alloy so that
surge voltage are reduced to negligible level & multiple reignition
is
eliminated.
5.2.2.7
The circuit breaker kiosk shall
free under various conditions.
5.2.3
be electrically
and mechanically trip
MAIN CONTACTS
The main contacts shall have adequate area and contact pressure for carrying
rated continuous and short time current without excessive heating liable to cause
pitting and welding.
The breakers may be provided with silver plated contacts, if necessary, to meet
the requirement of IS:13118/IEC56 where higher temperature rise is permitted
with silver plated contacts. The quantity of silver facing shall be such that after
carrying out one tenth of total number of operations specified for mechanical
endurance tests,
there is still continuous layer of silver on contacts.
5.2.4 NUMBER & TYPE OF SPARE, AUXILIARY CONTACTS/ SWITCHES :
Adequate number of spare auxiliary switches/contacts both of normally open &
normally close type but not less than four each shall be provided on the circuit
breaker for use in the indication and controlling scheme of circuit breakers.
5.2.5
INTERLOCK
All electrical and mechanical interlocks which are necessary for safe and
satisfactory operation of the circuit breaker shall be provided .
5.2.6
BUSHINGS FOR CIRCUIT BRAKER KIOSK
The out door circuit breakers shall be metal enclosed fitted with weather proof/
suitable type bushing conforming to IS:2099 and shall be designed to have the
necessary mechanical strength and rigidity required
and shall be free from
objectionable interference and external and internal corona. The porcelain shall be
of the wet process type, homogeneous, free from laminations and cavities or
other flaws which could effect its chemical & mechanical strength and shall not be
injuriously stressed by temperature change. The porcelain shall be thoroughly
vitrified tough and impervious to moisture and shall be evenly glazed. The glazing
shall be free from blisters or burrs. The bushing shall be designed manufactured &
tested in accordance with latest edition of IS:2099. The type and characteristic
data bushing shall be clearly specified.
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5.2.7
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OPERATING MECHANISM
Characteristics of Operating mechanism of circuit
equipments :
breaker and associated
Method of operation : The circuit breaker shall be equipped with power
operated mechanism to operate all three phases simultaneously using
220/240 V AC
Motor
operated spring closing mechanism or magnetic
actuator type. It shall be electrically & mechanically trip free under various
conditions. Kiosk shall also be provided with hand operated spring charging
closing mechanism. Operation counter and mechanically ON-OFF indicator shall
be provided.
5.2.8
VACUUM CIRCUIT BREAKER
The three phase vacuum circuit breaker will have three vacuum interrupters
(one interrupter per phase) mounted on same carriage. The interrupters shall be
air insulated with epoxy resin / insulated phase barriers. Each interrupter
shall have fixed and moving contacts in sealed envelops having vacuum
below 10-6 torr. The metallic bellow shall permit axial movement of moving
contact and act as vacuum seal. The contacts shall have requisite mechanical
strength and good electrical and thermal conductivity and shall be made of
copper
chromium alloy. Complete literature of vacuum bottles shall be
furnished with the tender.
5.2.9
VOLTAGE TRANSFORMERS
i)
ii)
Highest equipment voltage
No. of phases.
iii)
iv)
v)
vi)
vii)
viii)
Insulation level.
a) Impulse withstand voltage
b) One minute power frequency
withstand voltage on :
i) Primary winding
ii) Secondary winding
Frequency.
Transformation ratio.
Rated output.
Accuracy class.
Rated voltage factor.
ix)
Type of insulation
:
:
12 KV
3 Nos. single
phase VTs
:
75 KVP
:
:
:
:
:
:
:
35 KV rms
2 KV rms
50 Hz.
11000/110 V
100VA/Phase
0.5
1.2 continuous &
1.5 for 30 sec.
: Resin cast.
VTs, shall be provided with HRC type fuses on the secondary side. The VT fuses
on primary side shall also be provided with all safety precautions. One of the
secondary terminals of the VTs, shall be solidly earthed. Three numbers single
phase voltage transformer of this rated output will be required for each circuit
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breaker kiosk. Voltage transformers shall be fixed type and shall be suitable for
single phasing.
5.2.10
CURRENT TRANSFORMERS
i)
Rated voltage.
ii)
Insulation level.
a)
Impulse withstand voltage
b)
One minute power frequency
withstand voltage on :
i) Primary winding
ii) Secondary winding
:
12 KV
:
75 KVP
:
:
35 KV rms
3 KV rms
:
50 Hz.
iii)
Frequency.
iv)
Rated continuous thermal current: 120% of rated
primary current
Short time thermal rating
and its duration.
: 16 KA for 3 sec.
v)
vi)
Transformation ratio of :
CTs 400-200-100/5-5A
a) Rated output
b) Class of accuracy
c) Accuracy limit factor.
d) Purpose
vii)
Max.instrument security
factor.
Core-I
Core.II
---------------15 VA
15 VA
5 P
0.5
15
Relaying Metering
: -
5
(VA burden should not be less than suitable for series tripping arrangement
provided)
12 Kv current transformer shall be single phase. The core shall be of grade non
ageing laminated silicon steel of low hysterisis loss and high permeability to
ensure high accuracy at both normal and fault current.
5.2.11 The rating of secondary winding shall be 5 Amps. Required transformers ratio
can be achieved in any manner, However, the current transformers will have
to satisfy the requirement of rated VA burden, Class of accuracy , accuracy
limit factor and short time thermal rating as have been specified above at
all transformation ratio.
The rating of current transformers of all classes regarding ratio error, knee point
voltage, resistance of secondary winding etc. shall have to be co-ordinated with
the requirement of protective relays and protection scheme without any extra
cost.
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5.2.12
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The tenderer shall also furnish along with the tender, complete general
arrangement, schematic and outline diagrams indicating the mounting arrangement
and position of current transformers, potential transformer, terminal block etc.
Type of current transformers and potential transformers employed shall also be
clearly stated.
5.2.13 INDICATING AND INTERGRATING METERS/INSTRUMENTS:
All indicating instruments shall be of switch board type, back connected suitable
for flush mounting and provided with dust and vermin proof cases for tropical
use and finished in suitable colour. All instruments shall have practical laboratory
means of adjustment of accuracy. The limits of errors for ammeters/voltmeter
shall be permissible for class 1.5 instruments as per IS:1248. The ammeters
and voltments shall be suitable scaled to indicate the current for all the ratings
of current/voltage
transformers.
A
phase selector switch with four/six
positions shall be used to measure the current/voltage of each phase. The
meter shall be located at eye level to facilitate observation of readings
correctly.
5.2.14 RELAYS :
The circuit breaker shall be fitted with AC Series tripping arrangement for operation
on overload & earth fault by relays along with emergency shunt tripping from
remote.
Three phase protection relays shall be Numerical Over-current & Earth Fault
protection having 2 element for over current and one for earth fault protection.
The setting for over-current shall be 50-200% (in step of 10%) and for earth fault
element from 10 to 80% (in step of 10%). These relays shall be non directional
with selectable curve from all standard 5 IDMT curves. The numerical relays shall
have following features:a. Self Diagnosis
b. Minimum last five abnormal events recording (over current & earth fault)
including fault level and phase.
c. On-line display of current.
d. Communicable with open Protocol having RS-485 port.
The relay shall be numerical type mounted in flush pattern on the panel board.
The relay should be rated for 110V AC & 5 Amp. CT secondary. The relay should
conform to IS:3231 & 8686 specifications. The tenders shall furnish the detail in
this regard along with the offer.
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All the relays shall be provided with test blocks in panel so designed that the relays
may be tested in situ. The relays should have provision of testing either through
test block or test plug easily accessible by injecting the voltage / current/frequency
(as applicable) from external testing instruments /source without first
disconnecting/ reenergizing the primary electrical circuit protected by the relays.
Facilities for isolating the tripping circuit during such testing shall be also provided.
The requirement of test block shall not be applicable in case of drawout type relays
which can be tested by using test plug without removing the relay from its casing.
The testing facilities provided in the relays shall be specifically stated in the bid.
Necessary test plug etc. as may be required for proper testing shall be included in
the contractor’s scope of supply. One test plug with five panels or part thereof are
to be supplied.
The technical suitability of relays/schemes may also be examined by Protection
Wing & acceptability will be judged appropriately.
The bidder must furnish type test reports as per relevant ISS/ IEC along with bid
to suit the environmental conditions of our State, in respect of the relay (of the
type and design offered) which should have been type tested in NABL accredited
test laboratory in respect of such tests for which the lab has been accredited (for
Indian make Relays)/ CPRI/ Nationally accredited testing laboratory (for Foreign
make Relays). These type test reports should not be older than three years from
the date of opening of bid. Bids without Type Test reports will be treated as NonResponsive.
The Following makes of Relays are acceptable:a.
b.
c.
d.
e.
f.
g.
h.
Areva.
ABB.
Easun Reyrolle
C&S
JVS
SEL
ASHIDA
MEGAWIN
Any other equivalent make of relays shall also be acceptable subject to approval by
this office.
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5.2.15 WIRING :
All wiring shall be of switch board type consisting of copper conductor of 2.5
sq.mm cross section insulated with polyvinyl chloride insulation suitable for 660V
service and in accordance with relevant IS:732. Polyvnyl chloride used shall
have excellent resistance against burning, moisture, oil and vermin and shall
be finished with clear colour. Rubber insulated wiring shall not be acceptable.
Tenderers shall furnish the details of method being adopted by them for joint/
connections.
All instruments and panel wiring shall be of heat resisting and self extinguishing
type in compliance with British Standard Practice/IS. Plastic or porcelain cleats of
the limited compression type shall be used for holding wiring runs. All wires shall
be suitable for bending to meet the terminal studs at right angles. Metal cases of
all apparatus mounted on kiosk shall be separately earthed by means of
copper wire or strips. The following colour schemes of the wiring shall be used as
per IS:375.
a) AC three phase circuits :
i) No.1 phase
No.2 phase
No.3 phase
: Red
: Yellow
: Blue
ii) Neutral conductor
: Black
iii) Connection to earth : Green
5.2.16
TERMINAL BLOCKS :
Terminal blocks shall be 650 V grade, box clamp type ELMEX 10 sq.mm or
approved equal. Not more than two wires shall be connected to any terminal.
Spare terminals equal in number to 20% of active terminals shall be
furnished.
Terminal blocks shall be located to allow easy access. Wiring shall be so
arranged that individual wires of an external cable can be connected to
consecutive terminals.
5.2.17 TEST TERMINAL BLOCK :
Two Nos. test terminal block shall be provided one for testing of relays and other
for testing meters. They shall be of switch board type back connected for front
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of panel mounting. The test blocks shall provide complete isolation of meters,
instruments etc. and the arrangement shall be such that testing power could
be connected at the test block from any external source or may be taken from the
instrument transformers. Provision shall be made for short circuiting current
transformers. Suitable sealing arrangement shall be provided in test terminal
blocks.
5.2.18 INDICATING LAMPS :
Indicating lamps shall be provided on the control board to indicate the following:
i) Visual indication of ON and OFF position of each circuit breaker.
ii) PT supply indication.
Each lamp body shall be of moulded insulation and shall be able to withstand a
high voltage test of appropriate value. All lamps shall be suitable for 240 V AC
supply and shall have low power consumption and shall provide a wide angle of
illumination of sufficient intensity for comfortable viewing. A glass of
appropriate colour shall be screwed into the front of lamp body. The design of
indication lamp shall be such as to facilitate replacement of burnt lamps. An
engraved lable indicating the purpose of the lamp shall be provided with each
lamp.
5.2.19 FERRULES :
Ferrules engraved/printed with the same numbers, of symbols as indicated in the
connections and wiring diagram shall be provided on the terminal ends of all
wires for identification of circuits for inspection and maintenance. Ferrules
shall be of strong and flexible insulating material with glossy finish
to
prevent
adhesion. They
shall
be engraved/ printed and clearly marked
and shall not be effected by dampness. Ferrule numbering shall be in
accordance with IS:375. The same ferrules number shall not be used on wires in
different circuits on a panel.
5.2.20 HT TVM:3 phase 4 wire A.C. Static H.T. Trivector meter of accuracy class 0.5 S for
measurement of energy as per specification appended at Annexure-`A' shall be
provided on each Outdoor VCB Kiosks.
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Following makes of HT TVMs are acceptable to JVVNL :
i) Secure
ii) L&T
iii) ABB/Elster
iv) Schlumberger
5.3
SCHEDUOLE OF EQUIPMENTS, FITTING & ACCESSORIES :
12 KV 630 Amps Vacuum circuit breakers kiosks for out door installation :
5.3.1
1 No. - 12 kv 630 amp. vacuum circuit breaker horizontal draw out/ fixed type
with provision of manual tripping by means of push button and emergency
shunt tripping.
5.3.2 1 No. - AC Motor charged spring
actuator type closing mechanism.
operated closing mechanism or magnetic
5.3.3 1 No. - A.C. series tripping arrangement for operation on over current (load)
and earth fault by relays along with emergency shunt tripping from remote
place in addition to local emergency tripping(Mech.) One additional series trip coil,
fitted very near to the original coil (which will be unwired) is also required to be
provided.
5.3.4 3 Nos. - Single phase 12 KV current transformer ratio 400-200-100/5-5A suitable
for metering and protection. The class of accuracy shall be 0.5 for metering
and 5P15 for protection. Rated burden (output) shall be 15 VA for each secondary
winding and it should not be less than suitable for tripping arrangement provided.
Instrument security factor for metering core shall not be exceed 5.
5.3.5
6 Nos. - Rigid type bimetallic/ aluminium alloy terminal connector suitable for
ACSR (10% Panther and 90% Dog Conductor) for both horizontal/ vertical
take-off.
5.3.6 1 No. - Mechanical ON/OFF indicator.
5.3.7 1 No. - Operating handle for independent manual closing mechanism.
5.3.8 1 No. - Red indicating lamp for ON indication.
5.3.9 1 No. - Green indicating lamp for OFF indication.
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5.3.10 Spare auxilliary contacts/switch having minimum 4 NO + 4 NC
5.3.11
1 No. - Flush mounting pattern 96x96 sq.mm Moving Iron ammeter of class
1.5 accuracy suitable scaled for 5 Amps. CT secondary.
5.3.12 1 No. - Ammeter selector switch to indicate phase current in all three phases and
with OFF position.
5.3.13 1 No. – Numerical 2 O/C + E/F relay.
5.3.14
1 No. HT TVM of accuracy class 0.5S as per requirement mentioned at
Annexure-A.
5.3.16 2 Nos. - 240 V AC single phase 80 or 100 watt anti condensation heaters with
thermostat and switch.
5.3.17 1 No. - Automatic door illumination lamp with switch.
5.3.18
3 Nos. - 11000/110 V single phase voltage transformers each having 100
VA/phase burden & class of accuracy 0.5 suitably connected to meters and
indicating instruments etc.
5.3.19 1 No. - Flush pattern switch board mounting pattern 96x96 sq. mm moving iron
AC voltmeter of class 1.5 accuracy suitable for 110 V phase to phase secondary
suitably scaled.
5.3.20 1 No. - Voltmeter selector switch to indicate phase to phase & phase to neutral
voltage of all the three phases.
5.3.21 3 Nos. - Indicating lamps coloured Red,Amber Blue for PT supply.
5.3.22 2 Nos. - Test terminal blocks to test meters and relays with sealing arrangement.
5.3.23 1 No. - Blank lable on the front of kiosks at the top.
5.3.24 Door locks with keys for all doors.
5.3.25 Pair of base channel for grouting in floor.
5.3.26 Arrangement to check trip circuit healthy in all three phases.
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5.3.27 1 set - Self auxiliary plug and socket.
5.3.28 1 No. - Ground bus system, size 25 x 8 mm copper.
5.3.29 1 No. - Alarm bell with timer for breaking tripping indication.
5.3.30 1 No. - Operation counter.
5.3.31 1 No. - Name plate at front and back of each kiosk.
5.3.32 1 set - 3 phase air insulated main copper bus bar of 630 amp. continuous current
rating having maximum current density 1.5 Amp./ MM2 with minimum
cross sectional area 600 MM2 with PVC insulation or sleeves, STC rating 16
KA for 3 sec.
5.4
MAKE AND TYPE OF BOUGHT OUT ITEMS :
The makes of all bought out items shall be acceptable if it is of "ISI Marked"
or type tested for which tenderers shall furnish attested photostat copies of
ISI Certificate/type test report not older than three years for the respective
make offered along with tender.
5.4.2
Make / type of each relay, indicating
instruments,
integrating
instruments,
control switch for Circuit Breaker/Trip Transfer, selector switch
for
Voltmeter/Ammeter,
Semaphore
Indicator, indicating
lamps,
annunciator,
Push
Button, A.C. Hooter/Bell, D.C. Hooter, Heater, Link Type
Test Terminal Block for testing of TVM, CFL Tube, 2/3 Pin Socket with Switch
etc. shall be clearly and invariably indicated in the
GTP (Guaranteed
Technical Particulars), bill of material
and unit price list. Only specific make
accessories
shall be indicated. The word "EQUIVALENT/REPUTED MAKE"
will not be given for consideration.
Other standard accessories which are not specifically mentioned but are required
to be supplied with circuit breaker kiosk of similar type and rating for efficient
and trouble-free operation.
5.5 TEMPERATURE RISE :
The max. temperature rise of various parts of the circuit breakers when tested
under rated condition shall not exceed the specified values at a peak
ambient temperature of 50 deg.C . The breaker may be provided with silver
plated contacts if necessary to meet the requirement of IS:13118/IEC:56 where
higher temperature rise is permitted with silver plated contacts. The quantity
of silver facing shall be such that after carrying out one tenth of the total
number of operations specified for mech. Endurance test, there is a still
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continuous layer of silver on the contacts. The temperature rise of CTs and
PTs shall also not exceed the permissible values as per relevant Indian standards
when corrected for max. ambient temperature at site.
6.0
TESTS :
6.1
TEST BEFORE DESPATCH : The 12 KV vacuum circuit breakers and accessories
shall be subjected at maker's works before despatch, to the following tests
as per relevant IS/IEC.
A)
ROUTINE TESTS ON EACH UNIT AS PER RELEVANT STANDARDS
:
(i)
One minute power frequency voltage withstand dry
test on main circuit.
(ii) Voltage withstand test on control & auxiliary
circuits.
(iii) Measurement of the resistance of main circuit.
(iv) Mechanical operating test.
(v)
Design and visual checks.
B)
TYPE TESTS CONDUCTED ON ONE UNIT OF EACH RATING
AS PER RELAVANT STANDARDS:
(i)
Dielectric tests.
a) Lightning Impulse Voltage Test.
b) One Minute Power Frequency Test (Wet & Dry).
Short time withstand current and peak withstand current test.
Basic short circuit duties test.
Single phase short circuit test.
Mechanical Operation test as per M-2 class.
Out of phase making & breaking test.
Capacitive Current Switching Test.
a) Cable Charging Test.
b) Single Capacitor Bank Current Switching Test.
Measurement of resistance of main circuit.
Temp. rise test.
IP-55 Test (For cubicle/control cabinet).
Any other type tests not specified above but
covered as per amendment/latest edition of
relevant IS/IEC.
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
(viii)
(ix)
(x)
(xi)
C) The type test reports of Circuit Breakers, Current Transformers,
Potential Transformers, Relays, Meters etc. shall be complete in all
respect as per relevant IEC/ISS.
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6.2
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TYPE TESTS :
The 12 KV vacuum circuit breaker kiosk offered shall be fully type tested as per
relevant standards.
The
bidder must furnish type
test
reports along with bid as per the
qualification requirement of the Tender Specification.
However, the purchaser reserves the right to demand repetition of some or
all the type tests in presence of purchaser's representative. For this purpose,
the bidder should indicate unit rates for carrying out such type tests. These test
charges shall not be taken into consideration for bid evaluation.
6.3
TEST ON BOUGHT OUT ITEMS :
Tests are not required to be performed on bought out equipments/items like
motor, terminal connector, etc. at the works of manufacturer. Furnishing Test
Certificate of these items from the original equipment manufacturers shall be
deemed to be satisfactory evidence. Inspection of the tests at Sub-contractors
works will be arranged by the supplier whenever required.
6.4
ROUTINE/ACCEPTANCE TESTS :
(i)
The following acceptance and routine tests shall be got conducted in
presence of purchaser's representative as per stipulation of the relevant
standards, on each unit.
a)
One minute power frequency voltage withstand dry test on main circuit.
b)
Voltage withstand test on control & auxiliary circuits.
c)
Measurement of the resistance of main circuit.
d)
Mechanical operating test.
e)
Design and visual checks
(ii)
Inspection & tests on control gear.
In addition to the above tests at 6.4(i) above specified by IEC, the following
shall also be performed at manufacturer's works in presence of purchaser's
representative after completely assembling the kiosk.
a)
b)
c)
Checking wiring of circuits and their contacts.
Insulation resistance of complete wiring, circuit by circuit with all equipment
mounted on the panels.
Checking of operational protective schedule , instruments and meters.
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d)
Checking of phase faults between R&Y, Y&B and B&R phases. Kiosk should
trip under all three conditions.
(iii)
Temp. rise test on one No. Kiosk in the first offered lot shall
also be done in the presence of the purchaser's representative.
(iv)
Any other tests not specified above but
covered as per amendment/latest edition of relevant IS/IEC.
6.5
TOLERANCE ON TEST RESULTS :
As per relevant standards/specification.
6.6
TEST AT SITE :
The purchaser reserves the right to conduct all tests on 12 KV circuit breakers
after arrival at site and the contractor shall guarantee test certificate figures
under actual service conditions.
7.0
INSPECTION :
All the tests (as mentioned at Clause 6.4) and Inspection shall be made at the
place of manufacturer unless otherwise especially agreed upon by the bidder
and purchaser at the time of purchase. The bidder shall afford the inspection
officer(s) representing the purchaser all reasonable facilities without charges, to
satisfy him that the material is being furnished in accordance with this
specification. The purchaser has the right to have the tests carried out at his
own cost by an independent agency
whenever there is a dispute regarding
the quality of supply.
The Inspection may be carried out by the purchaser at
manufacture/ before despatch as per relevant standard.
any
stage
of
Inspection and acceptance of any material under the specification by the
purchaser, shall not relieve the bidder
of his obligation of furnishing
material in accordance with the specification and shall not prevent subsequent
rejection if the material is found to be defective. The Bidder shall keep the
purchaser informed in advance, about manufacturing programme so that
arrangements can be made for inspection.
The purchaser reserves the right to
routine testing of the bought out items.
insist
for witnessing
the acceptance/
The Bidder shall give 15 days advance intimation to enable the purchaser to
depute his representative for witnessing the acceptance and routine tests. The
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inspection charges(Inspectors traveling, boarding & lodging) would
purchaser's account.
be to the
8.0 QUALITY ASSURANCE PLAN
8.1
The tenderer shall invariably furnish following information along with his offer,
failing which his offer shall be liable for rejection.
Information shall be
separately given for individual type of equipment offered.
(i)
Statement giving list of important raw materials names of sub-suppliers for
the raw materials, list of standards according to which the raw materials are
tested. List of tests normally carried out on raw materials in presence of
tenderer's representative, copies of test certificates.
(ii)
Information and copies of test certificates as in (i) above in respect of bought out
accessories.
(iii)
List of manufacturing facilities available.
(iv)
Level of automation achieved and list of areas where manual processing exists.
(v)
List of areas in manufacturing process, where stage inspections are normally
carried out for quality control and details of such tests and inspections.
(vi)
Special features provided in the equipment to make it maintenance free.
(vii) List of testing equipments available with the tenderer for final testing of
equipment specified and test plant limitation. If any, vis-a-vis the type,
special acceptance and routine tests specified in the relevant standards. These
limitations shall be very clearly brought out in schedule of deviations from
specified test requirements.
8.2
(i)
The successful tenderer shall within 30 days of placement of order, submit
following information to the purchaser.
List of raw materials as well as bought out accessories
sub-suppliers selected from those furnished along with offer.
and the names of
(ii)
Type test certificates of the raw material and ought out accessories.
(iii)
Quality assurance plan (QAP) with hold points for purchaser's inspection. The
quality assurance plan and purchasers hold points shall be discussed between
the purchaser and supplier before the QAP is finalized.
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8.3
The successful bidder shall submit the routine test certificates of bought out
accessories and central excise passes for raw material
viz oil,
copper,
aluminium, conductors, insulating materials, core material at the time of routine
testing of the fully assembled equipment.
9.0
DOCUMENTATION
9.1
9.2
All drawings shall conform to International Standards Organization (ISO) `A',
series of drawing sheet/Indian Standards specification IS:13118/IEC-56. All
drawings shall be in ink and suitable for micro filming. All dimensions and data
shall be in S. I Units.
List of drawings and documents
The bidder
offer.
shall
furnish
four sets
of following drawings along with his
a) General outline and assembly drawings of
CTs,PTs etc.
the equipment i.e. breaker,
b) Graphs showing the performance of equipments in regard to magnetization
characteristics.
c) Sectional views showing i) General Constructional features.
ii) the materials/ gaskets /sealings used.
iii) the insulation, the winding arrangements, method of connection of the
primary/secondary winding to the primary /secondary terminals etc.
iv) porcelain used and its dimensions along with the mechanical and electrical
characteristics.
d) arrangement of terminal's and details of connection studs provided.
e) Name Plate
f) Schematic drawing
g) Type test reports in case the equipment has already been type tested.
h) Test reports, literature, pamphlets of the bought out items, and raw material.
9.3
The successful tender shall, within 2 weeks of placement of order, submit three
sets of final versons of all the above said drawings for purchaser's approval. The
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purchaser shall communicate his comments/approval on the drawings to the
supplier within four weeks.
The supplier shall, if necessary, modify the
drawings and resubmit three copies of the modified drawings for owners approval
with in two weeks from the date of owner's comments. After receipt of owner's
approval, the supplier shall within two weeks, submit 12 prints and two good
quality reproducibles of the approved drawings for purchasers use.
9.4
Six sets of the type test reports, duly approved by the purchaser, shall be
submitted by the supplier for distribution before commencement of supply.
Adequate copies of acceptance and routine test certificate, duly approved by the
purchaser shall accompany the despatch consignment.
9.5
The manufacturing of the equipments shall be strictly in accordance with the
approved drawings and no deviation shall be permitted without the written
approval of the purchaser. All manufacturing and fabrication work in connection
with the equipment prior to the approval of the drawing shall be at the supplier's
risk.
16 sets of nicely printed and bound volumes of operation, maintenance and
erection manuals in English language, for each type and rating of equipment
supplied shall be submitted by the supplier for distribution, prior to the
despatch of the equipment. The manual shall contain all the drawings and
information required for erection, operation and maintenance of the circuit
breaker. The manual shall also contain a set of all the approved drawings,
type test reports etc.
9.6
9.7
Approval of drawings/work by purchaser shall not relieve the supplier of his
responsibility and liability for ensuring correctness and correct interpretation of
the drawings for meeting the requirement of the latest revision of applicable
standards, rules and codes of practices. The equipment shall conform in all
respects to high standards of engineering, design, workmanship and latest
revisions of relevant standards at the time of ordering and purchaser shall have the
power to reject any work or materials which, in his judgement is not in full
accordance therewith.
10. PACKING AND FORWARDING
10.1 The equipments shall be packed in crates suitable for vertical/horizontal
transport as the case may be, and suitable to withstand handling during
transport and outdoor storage during transit. The supplier shall be
responsible for any damage to the equipment during
transit, due
to
improper and inadequate packing. The easily damageable material shall be
carefully packed and marked with the appropriate caution symbol. Wherever
necessary, proper arrangement for lifting, such as lifting hooks etc. shall be
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provided. Any material found short inside the packing cases shall be supplied by
supplier without any extra cost.
10.2
Each consignment shall be accompanied
containing the following information :
with
a detailed
packing
list
a) Name of the consignee.
b) Details of consignment
c) Destination
d) Total weight of consignment.
e) Sign showing upper/lower side of the crate.
f) Handling and unpacking instructions.
g) Bill of material indicating contents of each package.
10.3
The supplier shall ensure that the packing list and bill of material are approved by
the purchaser before despatch.
11.0 Optional Spares
The bidder shall
also recommend optional spares that will be required
for breakers along with their total and unit prices. However, the prices of
operation spares will not be considered for bid evaluation.
12.0
PERFORMANCE WARRANTY PERIOD :
The performance warranty period shall be 10 years from the date of receipt of
equipment along with all accessories.
The supplier will be required to furnish a Performance Bank Guarantee @ 10% (for
new suppliers)/ @ 5% (for old & established suppliers) amount of the total ordered
value, which is required to be valid for 10 years.
Successful bidder shall attend the complaint within 15 days from the date of
receipt of complaint and in case complaint is not rectified within 15 days period,
penalty @ 0.5% (half percent) per week or part thereof shall be levied upon the
supplier till complaint of breaker is attended and breaker is again kept in circuit.
13.0 Delay in Delivery of Inspected Material at Store :
If the material are not delivered within 7 days at same station, 14 days for
station within State and 20 days by the suppliers situated outside the State from
the date of receipt of the Dispatch Instructions. Charges shall be recovered @
Half Percent per week or part thereof (for actual delay in receipt), maximum
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upto 3% of the Dispatch Instructions consignment value
will be in addition to Clause No.1.24(1) of GCC.
14.0
(Ex-works). This
PAYMENT:-
A) FOR NEW SUPPLIERS:
90% (Ninety percent) payment of each consignment shall be made along with taxes &
duties by the Accounts Officer (CPC), Jaipur Discom, Jaipur subject to furnishing of
SBG & PBG in terms of relevant clause of GCC and balance 10% payment shall be
released on production of satisfactory installation & commissioning report of 12 KV
Outdoor Vacuum Circuit Breaker Kiosks duly verified by the Nodal Officer. In absence
of furnishing of Security Bank Guarantee & Performance Bank Guarantee, 78%
payment of the cost of each consignment along with 100% taxes, duties and freight
and insurance charges shall be made on production of receipted challan duly verified
by the consignee & 10% payment shall be released on production of satisfactory
installation & commissioning report of 12 KV Outdoor Vacuum Circuit Breaker Kiosks
duly verified by the Nodal Officer. No payment shall be released without
furnishing of complete type test reports.
B)
For old & established suppliers:75% (Seventy Five Percent) Payment of each consignment with taxes & duties
shall be payable on supply of breakers in absence of type tests, 10% (Ten Percent)
Payment shall be payable on production of satisfactory Installation &
Commissioning Report of the breaker by the respective field officer and balance
15% payment will be released after successful type test reports. In case of failure
of any of the type test reports, the balance 15% payment shall be forfeited for the
used material and remaining unused material will be lifted back by the supplier”
15.0 QUANTITY :
12 KV OUTDOOR VCB KIOSKS
: 3900 Nos.
The quantity as indicated above is approximate and may be increased or decreased
to any extent at the time of finalization of this tender enquiry.