CUSTOMER: AP TRANSCO

BILL OF MATERIALS FOR 36KV, 26.3KA, 1600A, OUTDOOR PCVCB WITHOUT CT

STRUCTURE
DEVICE.
DESCRIPTION QTY. Make
NO.

52
36kV, 26.3KA,1600A Porcelain Clad Vacuum circuit
breaker (with Stelmec Interrupters)with spring 1 No. Stelmec
charged stored energy mechanism having following
accessories:
a) Spring charging motor 230V AC - 1 No.
b) Trip coil suitable for 220V DC - 2 Nos.
c) Closing coil suitable for 220V DC- 1 No.
d) Aux. Contacts – 10 NO + 10 NC
e) Accessories:
 Mechanical Close & Trip push buttons.
 Manual spring charging device
 Mechanical operation counter
 Mechanical ON-OFF indicator
 Mechanical Spring charged indicator
f) Foundation bolt - 4 Nos.

Non discrepancy type C.B. Control switch with Pistol

Kaycee/ Recom / L&T/
52C/S grip handle, spring return to neutral 3 position (2 Trip 1 No.
Switron/ Select
+1Close), 25A, 220V DC
Local / Remote selector switch, Stay Put, Non-
Kaycee/ Recom / L&T/
43 L/R Lockable type, 25A, 220V DC 1 No.
Switron/ Select
Contacts – 4 Local + 4 Remote
Terminal connectors suitable for suitable for TWIN Exalt Engineering/
TC 6 Nos.
MOOSE ACSR conductor Ramelex/ Equivalent
Stelmec/Selec/ EAPL/
94 Solid state Anti pumping Device suitable for 220V DC 1 No.
Inventa/Fenixtroniks
Cubical illuminating Lamp with holder and protective Philips/Crompton/Bajaj/
IL 1 Set.
cage 5W LED Lamp, 230V AC. Anchor/ Surya/ Wipro

DS Door Limit switch 1 No. Suraj/Kaycee/ Select

2 Pole, 10A, DC MCB for Closing & Tripping Circuit 3 Nos.
C&S/Siemens/Legrand
MCB 2 Pole, 6A, DC MCB for Indication Circuit 1 No.
/L&T/Indoasian/Hager
2 Pole, 10A, AC MCB for AC Circuit 1 No.
F1 & F2 Fuse Base With Link 2 Nos. R.B.C.O/DAV/Deepl
H Space heater 80W, 230 V AC 1 No. Girish /APT
TH Thermostat (range 30° – 85° C) 1 No. Girish /APT
HS Toggle switch for heater ON-OFF 1 No. Kaycee/Select/Recom
P/P 3 pin socket with ON/OFF switch (5/15A) 1 Set. Anchor/Leader/ Maru
Indicating LEDs 220V DC
C&S/Vaishno/ Seco
ON Breaker ‘ON’ indication (Red) 1 No.
DAV/L&T/Select
OFF Breaker ‘OFF’ indication (Green) 1 No. /Fenixtroniks
SC Spring Charged Indication (Blue) 1 No.
Document No.33/PCVCB/B1624
Made JS 16.03.21
Chkd. VS 16.03.21
Appd. BSK 16.03.21
Rev. No. Date Revision Initials Sheet 1 OF 2 Rev.0
 CUSTOMER: AP TRANSCO
BILL OF MATERIALS FOR 36KV, 26.3KA, 1600A, OUTDOOR PCVCB WITHOUT CT
STRUCTURE
DEVICE.
DESCRIPTION QTY. Make
NO.

Aux. Contactor for

63AX Operating CTD & DC Supply supervision 2 Nos. C&S/Siemens/Schneider
Contact : 4NC, Aux. voltage 220V DC
Aux. Relay for
DCS DC supply supervision (Closing & indication circuit) 2 No. Selec/Paramount/EAPL
Contact : 1 NC, Aux. voltage 220V DC
Aux. Relay for AC circuit Supervision
ACS 1 No. Selec/Paramount/EAPL
Contact : 1 NC, Aux. voltage 230V AC

Aux. Relay for Spring Charge

88X 1 No. Selec/Paramount/EAPL
Contact : 4 C/O, Aux. voltage 220V DC

Aux. Relay for VCB contact Multiplication

52AX 1 No. Selec/Paramount/EAPL
Contact : 4 C/O, Aux. voltage 220V DC
Capacitor Trip Device
CTD Input voltage 220V DC , 1 No. Gogate/SECO/Stelmec
Output voltage 220V DC

Notes: -

1. The control cubicle will be fabricated sheet steel from 2.5mm (Min.) thick.

2. Painting: External & Internal: Colour – Light Grey as per Shade No.631 of IS: 5.

3. Degree of Protection for all enclosure: IP 55

4. Removable gland plate shall be provided.

5. Wiring shall be done with flexible 1100 V grade, PVC insulated, switch board wires with 2.5
sq mm stranded copper conductor.

Document No.33/PCVCB/B1624
Made JS 16.03.21
Chkd. VS 16.03.21
Appd. BSK 16.03.21
Rev. No. Date Revision Initials Sheet 2 OF 2 Rev.0
 CUSTOMER: APTRANSCO
GUARANTEED TECHNICAL PARTICULARS FOR 36KV, 26.3KA, 1600A, OUTDOOR PCVCB WITHOUT CT
STRUCTURE
33 KV
Sr. no. Particulars

1 Manufacturer's/Suppliers name address and country Stelmec Limited, Mumbai, India

2 Manufacturer’s type Designation SPCV36-VC53
3 Governing Standards IS:13118 (1991) & IEC 62271-100
4 Rated Voltage/Maximum 33/ 36 KV
5 Rated frequency (HZ) 50 Hz
6 Number of poles 3
7 Outdoor/Indoor Outdoor
8 Rated Normal Current (A)
a) Under site conditions 1600A
b) Under normal conditions as per IS/IEC 1600A
9 Rated short circuit breaking current -
a) RMS value of S.C. component 26.3 kA
b) Percentage D.C. component (%) 40%
c) Asymmetrical breaking current 30.21kA
d) Is it possible to increase the rupturing capacity at a
Yes
later date.
10 Short time current rating for 1 sec. 26.3kA
11 Rated operating duty cycle O-0.3Sec-CO-3Min-CO
12 Rated short circuit making current 65.75 kA Peak
13 First pole to clear factor 1.5
Rated characteristics for short time faults and rated
14 26.3kA
breaking capacity
Rated line charging current breaking capacity and
15
corresponding over voltage recorded during test NA
Rated out of phase breaking current and
16 6.80kA rms & 68 kVp
corresponding transient recovery voltage
Rated small inductive breaking current with
17 2.48 kA rms & 72 kVp
corresponding switching over voltage
Limit of switching over voltage for switching of 50
18 NA
MVAR, 63 MVAR shunt reactors
19 Capacity for Interrupting Transformer in rush current 20kA
Rated of cable charging breaking current and over
20 52 A rms & 47.1 kVp
voltages recorded during test
Rated (single) capacitor bank breaking current and
21 404 A rms & 48.4 kVp
corresponding overvoltages recorded during test.
Data on restriking voltage for 100% 60% 30%
22 100% 60% 30% 10%
10% terminal faults
a) Amplitude factor 1.54 1.65 1.74 1.8
b) Phase factor 1.5 1.5 1.5 1.5
c) Rate of rise of restriking voltage 1.19 1.91 3.33 3.45
d) Transient recovery voltage 67.9 72.7 76.7 79.4
Is circuit breaker restrike free under all conditions of
23 a) C1 class
operation
Means adopted if any to check the voltage rise check
b) NA
the voltage rise
Max. arcing time under any duty condition with limiting
24 20 ms (max)
conditions of voltage and pressure
Maximum total break time under any duty condition
25 for any current upto rated breaking current with 80 ms(max)
limiting conditions of voltage and pressure
Made JS 16.03.21
Chkd. VS 16.03.21
Appd. BSK 16.03.21
Rev. No Date Revision Initials Sheet 1 OF 7 Rev.0
 CUSTOMER: APTRANSCO
GUARANTEED TECHNICAL PARTICULARS FOR 36KV, 26.3KA, 1600A, OUTDOOR PCVCB WITHOUT CT
STRUCTURE
33 KV
Sr. no. Particulars

26 Maximum closing time 70ms max at 100% rated voltage

Minimum opening time under any duty condition with
27 <60 ms at 100% rated voltage
limiting voltage and pressure
Maximum close open time under any condition with
28 Max 80 ms at 100% rated voltage rated
limiting voltage and pressure
Minimum reclosing time at rated interrupting capacity
29 <300 ms
from the instant of trip coil energisation
30 Minimum dead time for -
a) Three phase reclosing <300 ms
b) One phase reclosing -
c) Limits of adjustment of dead time for three phase
-
Reclosing.
Difference in the instants of closing opening of contacts
31 -
at rated voltage and pressure
a) Within a pole <=2 ms
b) Between poles <=2 ms
Type of device, if any, used to obtain uniform voltage
32 -
distribution between contacts.
33 Maximum temperature rise for -
a) Main contacts over ambient temperature at site 40 degree C max
b) Terminals to be connected to the external
45 degree C max
conductors
One minute power frequency withstand test voltage for
34 -
complete circuit breaker
a) Between line terminal and ground objects with
70 kV rms
circuit breakers contacts closed
b) Between terminals with breaker contacts open 70kV rms
1.2/50 microsecond lightning impulse withstand test
-
35 voltage for complete circuit breaker
a) Between line terminal and ground with circuit
170kVp
breaker contacts closed
b) Across terminals with circuit breaker contacts open 170kVp
One terminal lightning impulse -
Opposite terminal power frequency -
250/2500 microsecond switching surge withstand
36 NA
voltage
I) Between line terminal and ground with circuit
NA
breaker contacts closed
II) Between terminals with breaker contacts open One
terminal switching impulse Opposite terminal power NA
frequency
37A Corona extinction voltage NA
37B Corona inception voltage NA
38 i) Radio interference voltage at NA
a) 0.5 MHz NA
b) 1.0 MHz NA
c) 1.5 MHz NA
d) 2.0 MHz NA
ii) Partial discharge level NA
39 Whether the circuit breaker is fixed trip or trip free Trip free

Made JS 16.03.21
Chkd. VS 16.03.21
Appd. BSK 16.03.21
Rev. No Date Revision Initials Sheet 2 OF 7 Rev.0
 CUSTOMER: APTRANSCO
GUARANTEED TECHNICAL PARTICULARS FOR 36KV, 26.3KA, 1600A, OUTDOOR PCVCB WITHOUT CT
STRUCTURE
33 KV
Sr. no. Particulars

40 a)Rated voltage of closing coils 220V DC

b)Range of pick up value 85% of Rated Voltage
41 Trip coil -
a) Rated voltage of tripping coil 220V DC
b) Range of pick up value 70% of Rated Voltage
42 Normal power consumption at rated voltage for 330 watt approx
43 Number of trip coils 2
44 Type of main contact RMF
45 Whether arcing contact provided No
46 Material of -
a) Main contact Cu-Cr Alloy
b) Arcing contact NA
c) Whether contacts silver plated Yes
d) Minimum thickness of silver plating <10 micron
e) Contact pressure of main contact 230±50 N
47 Number of auxiliary contacts per pole provided for
Purchaser's use.
a) NO 5NO
b) NC 4NC
48 Rated voltage of auxiliary contacts. 250 V AC/DC
49 Current capacity of auxiliary contacts -
a) Continuous 10A for 220 V DC
b) Breaking 2.5 for resistive load ,2A for inductive load
220 V DC
c) Time constant -
50 Whether auxiliary contacts silver plated. Yes
51 Quantity of SF6 gas required for each pole of circuit
NA For PCVCB
breaker
52 a) Guaranteed maximum leakage rate of SF6 gas per NA For PCVCB
year
b) SF6 density monitor provided NA For PCVCB
53 Limits of pressure of SF6 gas at which breaker operate NA For PCVCB
correctly
54 Number of operations after which SF6 gas replacement NA For PCVCB
is necessary
a) At full rapturing capacity NA For PCVCB
b) At 50% of rated rupturing capacity NA For PCVCB
c) At 10% of rated rupturing capacity NA For PCVCB
d) At rated current NA For PCVCB
55 Details of Interrupter NA For PCVCB
i) No of chambers NA For PCVCB
ii) Function of each chamber NA For PCVCB
56 Material of contacts NA For PCVCB
a) Arcing contacts (Main & Auxiliary) NA For PCVCB
Material of Tips NA For PCVCB
Ratio of Material (if more than one) NA For PCVCB
Production technique NA For PCVCB
b) Nozzle NA For PCVCB
Material NA For PCVCB

Made JS 16.03.21
Chkd. VS 16.03.21
Appd. BSK 16.03.21
Rev. No Date Revision Initials Sheet 3 OF 7 Rev.0
 CUSTOMER: APTRANSCO
GUARANTEED TECHNICAL PARTICULARS FOR 36KV, 26.3KA, 1600A, OUTDOOR PCVCB WITHOUT CT
STRUCTURE
33 KV
Sr. no. Particulars

Colour NA For PCVCB

Filled/unfilled NA For PCVCB
rate of acceleration NA For PCVCB
57 Number of operations after which main and auxiliary
contacts replacement is necessary.
a) At full rupturing capacity 100 nos
b) At 50% of rated rupturing capacity 200 nos
c) At 10% of rated rupturing capacity 500 nos
d) At rated current 20,000 nos
58 Number of operations at rated current after which
routine inspection/maintenance of breaker is 100 nos
necessary.
59 Number of operations at full rupturing capacity after
which routine inspection/maintenance of circuit NA
breaker is necessary.
60 Parameters of SF6 gas required for initial filling and NA For PCVCB
satisfactory operation
a) Governing standard NA For PCVCB
b) Density NA For PCVCB
c) Dielectric strength NA For PCVCB
d) Acidity NA For PCVCB
e) Water content NA For PCVCB
f) Oil content NA For PCVCB
g) Condensation temperature NA For PCVCB
h) Resistivity NA For PCVCB
i) size of SF6 Gas Cylinder NA For PCVCB
60 Support insulation column/units -
a) Manufacturers name, address & country Jaipur Glass/CJI/Genesis
/Ravikiran/Mahalakshmi
b) Make and type Hollow Insulator
c) Numbers per pole 2 nos
d) Weight 25 kg approx/unit
e) Material its composition and effect of SF6 Gas
Porcelain
degradation of the material
f) Transport dimensions Dia 280 x 520(L) mm
g) One minute power frequency withstand/flashover
70 kV / 210 kV
voltage
h) Lightning impulse withstand/flash over voltage. 170 kV / 210 kV
i) Switching impulse withstand flashover voltage -
j) Corona extinction and inception voltage NA
k) Creepage distance 900 mm
i) Permissible safe cantilever strength 600 kg for 1 min as per IS 2099
62 Type of operating mechanism for
a) Closing Motor/ Manual spring charge shunt
operating
b) Opening Motor/ Manual spring charge shunt
operating
63 No. of trouble free operations for virtually maintenance
10,000
free operation of Circuit Breaker.
64 Rated pressure and limits of pressure of operating NA
Made JS 16.03.21
Chkd. VS 16.03.21
Appd. BSK 16.03.21
Rev. No Date Revision Initials Sheet 4 OF 7 Rev.0
 CUSTOMER: APTRANSCO
GUARANTEED TECHNICAL PARTICULARS FOR 36KV, 26.3KA, 1600A, OUTDOOR PCVCB WITHOUT CT
STRUCTURE
33 KV
Sr. no. Particulars

mechanism in case of pneumatic and hydraulic

mechanism
65 Pneumatic operating mechanism NA For PCVCB
a) Rated operating pressure NA For PCVCB
b) Range of pressure for NA For PCVCB
i) Closing NA For PCVCB
ii) Opening NA For PCVCB
c) Air consumption at rated pressure for NA For PCVCB
i) Closing NA For PCVCB
ii) Opening NA For PCVCB
iii) Close-open NA For PCVCB
d) Number and capacity of local air receiver NA For PCVCB
e) Time required for filling the air receiver to its rated NA For PCVCB
pressure from atmospheric pressure
f) Design pressure of air receiver NA For PCVCB
g) Number of closing opening operations possible NA For PCVCB
without charging the air receiver
h) Arrangement provided for preventing the operation NA For PCVCB
of breaker with insufficient air pressure.
I)Compressor NA For PCVCB
i) Make and type NA For PCVCB
ii) Number of compression stages NA For PCVCB
iii) Compression pressure NA For PCVCB
iv) Whether compressor is provided with its own filter. NA For PCVCB
If so give type and make
v) Effectively delivered air in litres per hr. at NA For PCVCB
atmospheric pressure.
j) Compressed air piping NA For PCVCB
a) Material NA For PCVCB
b) Inner & outer diameter NA For PCVCB
c) Working pressure NA For PCVCB
66 Spring charged mechanism -
a) Name of manufacturer MK /Sunkid
b) Rating of motor V-220-240 AC/DC 50Hz Pi-880Watt
c) Time required for charging the closing spring <30 sec
d) Number of Co-operations possible after failure of
-
auxiliary supply
e) Whether indication for spring charged condition
Yes
provided in central control cabinet.
67 Hydraulic Operating Mechanism NA For PCVCB
a) Rated pressure of oil in operating cylinder NA For PCVCB
b) Limits of operating pressure NA For PCVCB
c) Specification of oil and quantity required per NA For PCVCB
breaker
d) Number of CO operations possible after loss of NA For PCVCB
hydraulic pressure.
e) Details of arrangement to prevent change of position NA For PCVCB
of breaker in the event of loss of hydraulic pressure.
f) Details of monitoring arrangement for hydraulic NA For PCVCB
pressure

Made JS 16.03.21
Chkd. VS 16.03.21
Appd. BSK 16.03.21
Rev. No Date Revision Initials Sheet 5 OF 7 Rev.0
 CUSTOMER: APTRANSCO
GUARANTEED TECHNICAL PARTICULARS FOR 36KV, 26.3KA, 1600A, OUTDOOR PCVCB WITHOUT CT
STRUCTURE
33 KV
Sr. no. Particulars

g) Details of hand pump set provided for emergency NA For PCVCB

operation.
68 Control Cabinet
a) Manufacturer's name Stelmec Limited
b) Thickness of sheet steel
Front 2.5 mm
back 2.5 mm
Side walls 2.5 mm
c) Degree of protection provided and test certificated
IP55
enclosed.
d) Colour of finish paint
i) Outside Light Grey as per Shade No.631 of IS: 5
ii) inside Light Grey as per Shade No.631 of IS: 5
e) Control wiring -
i) Rated voltage 1100V Grade
ii) Size 2.5Sq.mm
f) Terminal Block -
I ) Make Connectwell/Elmex/Pheonix
ii) Current rating 45A
g) Locking Mechanism -
h) Illuminating lamp 5W, 230V AC LED Lamp
i) Whether all cabling for wiring out contacts to
-
control cabinet included in scope of supply.
69 Terminal clamps and connectors
a) Manufacturer's name Exalt Engineering/Ramelex
b) Applicable standard IS5561-1970
c) Material Aluminium
i) Clamp body Al-4600 as per IS 617 /LM6
ii) Bolts and nuts Steel
iii) Spring washer Steel
iv) Liner if any -
d) Rated current 1600A
e) i) Rated terminal load -
ii) Factor of safety -
f) Radio interference voltage -
g) Corona extinction voltage -
h) Maximum allowable span for aluminum tube of
114.2mm outer diameter and 97.18mm inside diameter
on equipment terminal pad with rated fault current and -
7m, 4.5m phase-to-phase spacing for 420kV, 245kV
breakers respectively.
70 Overall dimensions -
a) height 2329mm + 5%
b) width 1635mm + 5%
c) length AS per Approved GA drawing
71 Clearances -
a) Between poles 490 mm
b) Between live part and earth 3700 mm including foundation
72 Weight of -
i) Each pole 60 kg Approx
Made JS 16.03.21
Chkd. VS 16.03.21
Appd. BSK 16.03.21
Rev. No Date Revision Initials Sheet 6 OF 7 Rev.0
 CUSTOMER: APTRANSCO
GUARANTEED TECHNICAL PARTICULARS FOR 36KV, 26.3KA, 1600A, OUTDOOR PCVCB WITHOUT CT
STRUCTURE
33 KV
Sr. no. Particulars

ii) Complete breaker 550 kg approx including structure

73 Noise level
a) at base <145 dbA
b) at 50 mtrs. and 100 mtrs. Distance from base <145 dbA
74 Enclosures -
Whether the following are enclosed: -
i) Type test reports for main equipment and auxiliaries Yes
ii) Drawings as per Section General Yes
iii) Technical literature for Circuit Breakers, SF6 Gas,
Yes
support insulators and operating mechanism.

Made JS 16.03.21
Chkd. VS 16.03.21
Appd. BSK 16.03.21
Rev. No Date Revision Initials Sheet 7 OF 7 Rev.0