HomeMy WebLinkAbout111572 WESTERN UNITED ELECTRIC SUPPLY - PURCHASE ORDER - 8856134Date: 10/1412008
Fort Colslins
Page Number: 1
Purchase Order Number: 8856134
Delivery Date: 10/13/2008 Buyer: DICK,OPAL
Purchase Order number must appear on invoices, packing lists, labels, bills of lading, and all correspondence.
Note:
Line Qty UOM Description Unit Price Extended Price
1 10 EA T1050111: transformer
10kva; mod OH; 1 phase
T1050111
YARD
TRANSFORMER, 10 kVA, MODIFIED OVERHEAD, SINGLE
PHASE DISTRIBUTION WITH ONE HIGH VOLTAGE BUSHING
WELL, HIGH VOLTAGE RATING: 13200 GRDY/ 7620.
LOW VOLTAGE RATING: 120/240.
SERIAL NUMBER 111 TO BE IN ACCORDANCE WITH
SPECIFICATION #368-105-111, REVISION KK
NO LOAD LOSS - 36
TOTAL LOAD LOSS -145
TOTAL LOAD LOSS - 181
IMPEDANCE 2.1%
MFR.HOWARD
DELIVERY 10-12 WEEKS
HOWARD QUOTE MK-0889
Total
City of Fort qllis Director of Purchasing and Risk Management
This order is valid over $5000 unless signed by James B. O'Neill 11, CPPO
City of Fort Collins Purchasing, PO Box 580, Fort Collins, CO 80522.0580
Phone: 970.221-6775 Fax: 970-221-6707 Email: purchasing@fcgov.com
1,149.000
11,490.00
$11,490.00
City of Fort Collins
Accounting Department
PO Box 580
Fort Collins, CO 80522-0580
Rev. Sym. KK
3.2.7 LOSSES
The total losses of a transformer shall be the sum of the excitation losses and the load losses (IZR
losses). Load loss tests shall be performed and reported on all units regardless of whether or not a
record of such tests is available on duplicate units. Loss evaluations and loss costs will be based on
the values shown in the "Special Conditions and Supplemental Instructions to Bidders." Transformers
will be evaluated on excitation losses and I2R losses at the specified rates. If tested losses exceed
quoted losses but are within the tolerances of paragraph 9.3, ANSI C57.12.00-2000, the additional cost
incurred from the differential of losses will be calculated using the following equation and the above
specified rates and will be deducted from the original Purchase Order or back charged to the
manufacturer. In the following equation "Units" shall mean "Transformers of the same size and design
on one order."
Excess loss $ _ [No. of units] [(No Load Loss Evaluation $) (Avg. No Load Losses - Quoted No Load
Losses) + (Load Loss Evaluation $) (Avg. Load Losses - Quoted Load Losses)]. If this equation results
in a negative number, no credit will be given the Supplier.
If any unit or units exceed the tolerances of paragraph 9.3, ANSI C57.12.00-2000, that unit or units shall
not be shipped without express permission from the City. If accepted, the deduction for excess losses
will be based on the following equation: Excess loss $ _ (No Load Loss Evaluation $) (No Load Losses
- Quoted No Load Losses) But Not Less Than Zero + (Load Loss Evaluation $) (Load Losses - Quoted
Losses) But Not Less Than Zero.
4 QUALITY ASSURANCE
4.1GENERAL
4.1 A RESPONSIBILITY FOR INSPECTION
Unless otherwise specified, the vendor is responsible for the performance of all inspection requirements
as specified herein. Except as otherwise specified, the vendor may utilize his own facilities or any
commercial laboratory acceptable to the City of Fort Collins. The City reserves the right to perform or
witness any of the inspections set forth in this Specification where such inspections are deemed
necessary.
4.1.2 TEST REPORT
The manufacturer shall furnish to the purchaser certified copies of the results of loss tests prior to
payment. Copies of loss tests shall be sent to Standards and shall be attached to the invoice.
Unsigned copies are not acceptable even if accompanied by a signed cover letter.
4.2 TEST CONDITIONS
Unless otherwise specified, testing required by Section 4.4 shall be conducted under the following conditions.
4.2.1 REFERENCE TEMPERATURE
The reference temperature to which losses, impedance, regulation, and efficiency are corrected shall be
85°C.
4.2.2 TOLERANCE ON IMPEDANCE VOLTAGE
Impedance on completed units shall fall within the ranges specified herein.
4.2.3 TOLERANCE ON IMPEDANCE VOLTAGE ON A TAP
The percent departure of tested impedance voltage on any tap from tested impedance voltage at rated
voltage shall not be greater than the total tap voltage range expressed as a percentage of the rated
voltage.
9
368-105
Rev. Sym. KK
4.3 NOT USED
4.4 TESTS
The tests to be performed and the test procedures required are specified in ANSI C57.12.20, ANSI C57.12.00,
and C57.12.90. Exception: impedance and load -loss tests shall be made on each unit and may not be omitted
even if a record of such tests made on a duplicate unit is available.
5 PREPARATION FOR DELIVERY
Transformers shall be prefilled with the appropriate amount of transformer oil and shall be shipped by open -bed truck.
Units shall be packaged in such a way as to provide for ease of handling and to protect units from shipping damage.
Units shall be packaged on four-way universal pallets with 34 inch minimum opening and loaded on the truck for side
removal. The Supplier shall provide 24 hour notice prior to delivery for any shipments where an individual transformer
weighs over 5,000 pounds. In addition to these requirements, the Supplier shall comply with any additional
requirements or modifications shown on the purchase order and/or supplemental instructions.
10
368-105
Rev. Sym. KK
APPENDIX A — Transformer Stock Number Coding
Below are examples that demonstrate the coding method used by City of Fort Collins to establish
transformer stock numbers.
I. SINGLE PHASE
Example #1: 1]9=�
Transformer Class
Single Phase
00 = 13.2Y/7620 &
7620/13.2Y x
2400/4160 outside
pole
05 = 13.2Y7620 ESNA pole
20 = 13.2Y/7620 ESNA pad
II. THREE PHASE
Example#2 ll—> 368 -
Transformer Class
3 Phase
Pad
Other
KVA
0 = 5
5=50
1=10
6=75
2=15
7=100
3=25
8=167
4=37.5
9=250
1 = single voltage
2 = dual voltage
KVA
006 = 75 075 = 750
015 = 150 100 = 1000
030 = 300 150 = 1500
060 = 500
• All suffixes indicate 208Y/120 sec.
• For 480Y/277 sec., add 1 to XYZ
(ie. 007 would indicate a 75kVA with
480Y/277 sec.)
11
368-105
Rev. Sym. KK
APPENDIX B — Tank Coating Comparison
This Appendix is not intended to dictate requirements for items purchased under Specification 368-
105, but is included as an aid in comparing coatings for those manufacturers attempting to meet the
requirements of this design.
Tank coatings listed here are for reference only and shall not be considered as complete. Also, the
City of Fort Collins shall not be held responsible for patent infringements incurred through the use of
this information.
B.1 ARMORTEC, a fusion bonded vinyl resin having a minimum coating thickness of 15 mils.
B.2 Coal -tar Epoxy having a minimum thickness of 15 mils applied in two coats over a zinc rich
primer and overcoated with flow coat applied black enamel paint.
B.3 Electrostatically applied thermosetting polyester applied as follows:
1. Five Stage Wash - alkaline detergent, water rinse, phosphate treatment, water
rinse, and sealing rinse.
2. Delay Line - dry and cool.
3. Coat - Electrostatically coat with a thermoset- ting polyester.
4. Bake - Heat as recommended by polyester manufacturer to set polyester.
5. Cool.
6. Repeat Process - Repeat applicable steps of above process to obtain a minimum dry
build of 6 mils.
B.4 Ceilcote Flakeline 252 (minimum thickness 35 mils).
12
368-105
Rev. Sym. KK
APPENDIX C — Approved Manufacturers
Transformers purchased under this Specification shall be of the make shown below. Manufacturers
not listed below may submit written proposals demonstrating compliance with these Specifications for
consideration of addition to the accepted manufacturer list prior to the next request for bids. In addition
to inclusion on the list below, manufacturer's equipment must also satisfy all requirements of this
Specification to be acceptable.
MANUFACTURER SERIAL NO.
Cooper Power Systems All except 196 & 195
Howard Industries All
ABB All
Central Moloney All
The manufacturers in the following list have been conditionally approved and may bid as an alternate.
The definition and intent of "Conditional Approval" of a manufacturer is to allow the City to gain some
experience with the manufacturer's product. Should a conditionally approved manufacturer be the
evaluated low bidder, the City reserves the right to award all, part, or none of the order to them,
dependant upon the current needs of the City for that item or items.
13
368-105
Transformer Loss Evaluation Form- AVERAGE LOSSES
City Order No. S/N
Manufacturer Invoice No.
KVA/Unit
LINE
DESCRIPTION AMOUNT
(1)
No. of units
(2)
Average core losses
(3)
Quoted core losses
(4)
Excess average core losses:
line (2) less line (3)
(5)
Penalty for excess average core losses:
line (1) x line (4) x $
6)
Average copper losses
(7)
Quoted copper losses
(8)
Excess average copper losses:
line (6) less line (7)
(9)
Penalty for excess average copper losses:
line (1) x line (8) x $
(10)
Penalty to be assessed manufacturer:
line (5) plus line (9) but not less
than zero
Date
Prepared By:
Design Engineering
Rev. Sym. KK
NOTE: If any unit(s) exceeds the loss tolerances of ANSI C57.12.00, Light & Power will either reject it,
include it on these averages, or calculate losses using the Individual Transformer Losses Evaluation
Form, whichever is most favorable to Light and Power.
14
368-105
Individual Transformer Loss Evaluation Form
City Order No. S/N
Manufacturer Invoice No.
KVA/Unit
LINE
DESCRIPTION
(1)
Tested core losses
(2)
Quoted core losses
(3)
Excess core losses
line (1) less line (2) but not less
than zero
(4)
Percent difference
line (3) , line (2) x 100
(5)
Tested total losses
(6)
Quoted total losses
(7)
Excess total losses
line (5) less line (6) but not less
than zero
(8)
Percent difference
line (7) , line (6) x 100
(9)
Tested copper losses
(10)
Quoted copper losses
(11)
Excess copper losses
line (9) less line (10) but not less
than zero
(12) Penalty for excess core losses
line (3) x $
(13) Penalty for excess copper losses
line (11) x $
AMOUNT
(14) Penalty to be assessed manufacturer
line (12) plus line (13)
Date Prepared By: (Design Engineering)
Rev. Sym. KK
15
368-105
Rev. Sym. KK
Special Conditions andSupplemental Instructions to Bidders
Applicable to Specification 368-105
A. Data to be Supplied with Bidder's Proposal
The following data shall be supplied with the bidder's proposal in addition to that information required by
the "Invitation to Bid" and the "Purchase Requisition".
1. Impedance volts in % at full load, high voltage to low voltage at 85°C.
2. No load and total losses at 85°C.
3. Protective tank coating specification.
4. A statement indicating compliance with our Specification without exception.
5. Escalation is _, is not _ applicable for the transformers bid. If escalation applies, the Bidder shall
indicate in his bid the specific items or materials subject to escalation, and shall give the method and indices
to be used in computing the amount thereof. Escalation occurring after the quoted delivery date will not be
paid unless delays are the result of actions by the City. Escalation occurring after acceptance, if Purchaser
exercises the option to delay shipment after manufacturing is completed, will not be paid.
Failure to supply the above data shall constitute a basis for rejection of the bid.
B. Loss Evaluations
Loss penalties and loss evaluations will be based on the following values:
1. No load or excitation losses at $3.25/watt.
2. Load losses at $1.10/watt.
C. Shipping Terms
Ship F.O.B. point of destination, freight prepaid.
D. Terms of Pavment
1. If escalation applies, the City of Fort Collins shall not be billed for escalation occurring after the promised
delivery date. Escalation charges shall be itemized on the invoice.
2. Test reports shall accompany the invoice. If test reports do not accompany the invoice, late payment
penalty charges incurred due to delays in obtaining the test reports will not be paid. Certified copies of test
reports shall be sent to the Design Section, Fort Collins Light and Power Utility.
3. Loss penalty credits and escalation charges shall be itemized on the invoice.
16
368-105
THE CITY OF FORT COLLINS
Light and Power Department
P.O. Box 580
Fort Collins, CO 80522
SPECIFICATION NO: 368-105
TITLE: OVERHEAD -TYPE, SINGLE PHASE
DISTRIBUTION TRANSFORMERS
WITH SEPARABLE
INSULATED LOAD BREAK HIGH -VOLTAGE CONNECTORS
PREPARED BY: 1"""'v "��
Tim M. Sagen, S ndards Engineering Manager
ORIGINATED: March 3, 1973
REVISED: February, 2003
Rev. Sym. KK
REVISION DESCRIPTIONS
REVISION DESCRIPTION (Previous revisions on file)
APPROVED
Rev. II
•
Updated Table of Contents
Sagen/Coram
•
Paragraph 3.2.2.1.1; 3.2.4.2. - Editorial
7/27/94
•
Paragraph 3.2.3.1. - updated ANSI reference
•
Paragraph 3.2.3.2. - changed lead type terminals to stud type, updated ANSI
reference to 1985.
•
Paragraph 3.2.5.2 - Deleted reference to Table II
•
Paragraph 3.2.5.6. - Updated ANSI reference; changed "non -PCB" reference to
"contains < 1 ppm PCB
•
Paragraph 3.2.6.1. - Change Table III to Figure 2
•
Paragraph 3.2.7, - Delete ratio requirement, update ANSI reference to 1987.
•
Paragraph 4.2.2. - Change impedance tolerance to within range specified.
•
Table 1: Change lead type LV terminals to stud type. Add impedance ranges on 131,
151, and 156.
•
Add Figure 1
•
Changes Table III to Figure 2
•
Appendix C — delete tank coating from table.
Rev. JJ
Sagen 9/4/97
•
Paragraph 5.0 —Added pallet requirements
Rev. KK
Sagan 2/20/2003
•
Update date specific references to ANSI standards.
•
Add reference to Central Moloney secondary bushings.
•
Add Central Moloney to Approved Manufacturers list in Appendix C.
2
368-105
TABLE OF CONTENTS
REVISION DESCRIPTIONS ..................................
1 SCOPE................................................................
2 APPLICABLE DOCUMENTS............................................................
3 REQUIREMENTS...............................................................................
4 QUALITY ASSURANCE...................................................................................
Rev. Sym. KK
.................................................................. 2
..................................................................4
...........................4
................................4
............ I ......................... 9
4.1 GENERAL....................................................................................................................................................................................9
4.1.1 RESPONSIBILITY FORINSPECTION............................................... _.............. _......... _....--- ......... - ................................ 9
4.1.2 TEST REPORT ................. _.......... _............. .......................................................................................................................... 9
4.2 TEST CONDITIONS....................................................................................................................................................................9
4.2. l REFERF,NC/ TErWPERAI'U12L......... _.... _._...................................................................................... _...... _.......... _ _.... ...... 9
4.2.2 TOLERANCE ON IMPEDANCE VOLT AGE.. _.... _... _. _. _....... _.................._.... .... .............. ....... ....................................... - 9
4.2.3 TOLERANCE ON A11PEDANCE VOLTAGE ON A TAP................... .................................. ._........................_.................... 9
4.3 NOT USED.................................................................................................................................................................................10
4ATESTS.........................................................................................................................................................................................10
5 PREPARATION FOR DELIVERY......................................................................................................................................10
APPENDIX A - TRANSFORMER STOCK NUMBER CODING..........................................................................................11
APPENDIX B - TANK COATING COMPARISON...............................................................................................................12
APPENDIX C -APPROVED MANUFACTURERS..............................................................................................................13
TRANSFORMER LOSS EVALUATION FORM- AVERAGE LOSSES................................................................................14
INDIVIDUAL TRANSFORMER LOSS EVALUATION FORM..............................................................................................15
SPECIAL CONDITIONS ANDSUPPLEMENTAL INSTRUCTIONS TO BIDDERS.............................................................16
3
368-105
Rev. Sym. KK
SPECIFICATION FOR OVERHEAD -TYPE, SINGLE PHASE DISTRIBUTION TRANSFORMERS
WITH SEPARABLE INSULATED LOAD BREAK HIGH -VOLTAGE CONNECTORS
1 SCOPE
This Specification establishes the minimum requirements for single phase, 60 hertz, mineral -oil -filled self cooled
(O.I.S.C.) overhead -type distribution transformers with separable insulated load break high voltage connectors; rated
250 kilovolt -amperes (KVA) and smaller; high -voltage: 7620/13200Y and dual voltage 7620/13200Y x 2400/4160Y; low
voltage 120/240, 240/480, 277 volts, and 4160Y/2400.
2 APPLICABLE DOCUMENTS
The following American National Standards (ANSI) for Distribution, Power, and Regulating Transformers and Shunt
Reactors form a part of this Specification:
General Requirements C57.12.00
• Overhead -Type Distribution Transformers
• Terminal Marking and Connections
• Terminology
• Test Code
Appendix to ANSI C57.12.20
• Separable Insulated Connectors
3 REQUIREMENTS
3.1 GENERAL REQUIREMENTS FOR DESIGN
C57.12.20
C57.12.70
C57.12.80
C57.12.90
C57.91
ANSI/IEEE 386
Unless otherwise stated in this Specification, all transformers shall be new and shall conform to the American
National Standard Requirements for Overhead -Type Distribution Transformers, ANSI C57.12.20 - latest
revision. In case of conflict, the requirements of the following documents shall apply in the priority shown:
1. This Specification.
2. Referenced ANSI Standards.
Approved manufacturers are listed in Appendix C. For purposes of warranty and service, any distributor bidding
must be an authorized distributor appointed by an approved manufacturer to serve the Fort Collins area.
3.2 SPECIFIC REQUIREMENTS FOR DESIGN
3.2.1 FUNCTIONAL DESCRIPTION
Transformers of this design are for installation on an underground power system utilizing separable
insulated connectors and may be installed in underground vaults subject to submersion. They may also
be padmounted under an enclosure, or pole mounted. The transformer tank, cover, and all external
appurtenances shall be of corrosion -resistant material, unless they are otherwise rendered corrosion
resistant.
3.2.2 RATINGS
3.2.2.1 KILOVOLT -AMPERE -RATINGS
3.2.2.1.1 NAMEPLATE RATING
Kilovolt -ampere ratings are continuous and based on not exceeding either a 65°C average winding
temperature rise or an 80°C hot spot temperature rise. The temperature rise of the insulating oil shall
not exceed 65' when measured near the top of the tank. The KVA rating shall be regarded as a test
rating which defines an output which can be taken from the apparatus under the prescribed conditions
of test within the limitations of all applicable standards. KVA ratings shall be in accordance with Table-
t.
4
368-105
Rev. Sym. KK
3.2.2.1.2 ADDITIONAL SUPPLEMENTAL LOADING
Additional supplemental loading may be carried as recommended by ANSI C57.91.
3.2.2.2 VOLTAGE RATINGS
Secondary and primary voltage ratings shall be in accordance with Table 1.
3.2.2.3 IMPEDANCE
Nominal impedance voltage shall be in accordance with Table 1 of this specification. Completed units may
vary from the specified nominal up to the tolerance specified in ANSI C57.12.00.
3.2.2.4 BASIC IMPULSE INSULATION LEVELS
The high voltage BIL shall be 95 kV. The low voltage BIL shall be 30 kV.
3.2.3 BUSHINGS AND TERMINALS
All internal leads and connections, on both high and low voltage, shall be sized to carry full ampere
rating, including overload rating of transformer.
3.2.3.1 HIGH VOLTAGE TERMINALS
The number of high voltage terminals required is specified in Table 1. High -voltage bushing wells shall be
cover mounted 200A load -break interface 8.3/14.4 kV bushings in accordance with ANSI/IEEE Std. 386.
3.2.3.2 LOW VOLTAGE TERMINALS
Terminal type and number shall be in accordance with Table 1 of this specification. Eyebolt and spade
terminals shall be singly mounted sidewall type. Stud type terminals shall be singly mounted on the
sidewall at 5.5 to 7.5 inch center to center spacing. Stud type terminals shall be equivalent to Central
Moloney type 7013 having dimensions in accordance with Figure 1 of this specification or Central Moloney
type 70105850, shall have a copper stud, and shall be internally or externally clamped. All non-metallic
components of the terminals shall be of a material resistant to ultra -violet degradation. Mounting hardware
shall be corrosion resistant. Secondary terminals for transformers with secondary voltages above 480V
shall be cover mounted 200A load -break interface 8.3114.4 kV bushings in accordance with ANSI/IEEE So
386.
Figure 1
See below
\ II I1
Yi
r_
1.38" dia. -)
I
WA Rating Thread Size Min. Length
25 - 75
0.625" — 11 UNC-2A
1.25"
100 - 1671.75"
5
368-1D5
Rev. Sym. KK
3.2.4 NEUTRAL TERMINATION
3.2.4.1 On transformers having one high voltage bushing, the H2 end of the winding shall be securely grounded
internally.
3.2.4.2 On units having three external eyebolt or spade type low -voltage terminals, the Xz connection of the
winding shall be isolated and an adequate external copper ground strap shall be provided from the neutral
bushing to a standard tank ground pad.
On units having lead type low -voltage terminals, the X2 connections of the winding shall be connected to
the tank internally and such connection shall be indicated on a label next to the X2 lead as well as on the
nameplate.
Ground connections shall be suitably sized for the short-circuit rating of the transformer as defined in ANSI
C57.12.00.
3.2.4.3 An adequate stainless steel connection shall provide electrical continuity between the tank and the cover.
3.2.5 ACCESSORY EQUIPMENT
In addition to the requirements of ANSI, accessory equipment shall be provided in accordance with
Table 1 and the following details.
3.2.5.1 Current -protecting (CP) when specified in Table 1 shall include internal weaklink primary fuse, secondary
breaker, signal light, and emergency control handle. Internal fusing (internal) when specified in Table 1
shall include an internal partial range current limiting fuse in conjunction with an internal eutectic
(temperature sensitive) weak link fuse.
3.2.5.2 When required by Table 1, an RTE Bay-o-net fuse and internally mounted ELSP partial range current
limiting fuse(s) shall be furnished. Bay-o-net fuses shall be top mounted or sidewall mounted as required in
Table 1.
3.2.5.3 When the transformer is specified as a dual voltage unit, an externally operated dual voltage switch shall
be provided.
3.2.5.4 Taps, when required, shall be full capacity above and below normal and shall be provided with an
externally operated tap changer switch. On dual voltage transformers, taps shall be furnished on the top
voltage only.
3.2.5.5 Cover mounted, pocket type, cable accessory, parking stand for a loadbreak stand off device shall be
provided.
3.2.5.6 Cover mounted instruction nameplate conforming to 5.12 of ANSI C57.12.00-1987, Nameplate A, shall be
provided. Also, on the nameplate or label affixed near it, the manufacturer shall indicate that the dielectric
fluid contains less than 1 ppm PCB.
6
368-105
Rev. Sym. KK
TABLE 1
STOCK
N0. 368-
105-
SERIAL
KVA
% Z
HIGH VOLTAGE
LOW VOLTAGE
PROTECTION
TYPE
RATING
TERMINALS)
TAPS
RATING
TYPE AND
NUMBER OF
TERMINALS
ABOVE
BELOW
-111
10
TBD
13200 GRDY/7620
One bushing well
-
-
120/240*
Three Eyebolt
CP
-131
25
1.77 to 2.16
13200 GRDY/7620
One bushing well
-
-
120/240*
Three CU stud
CP
-151
50
1.77 to 2.16
13200 GRDY/7620
One bushing well
-
-
120/240*
Three CU stud
CP
-155
50
TBD
7620/13200Y
Two bushing wells
2-2%%
2-2%,%
120/240*
Three 4 hole
"H"
S
-156
50
TBD
13200 GRDY/7620
One bushing well
-
-
240/480
Three Eyebolt
CP
-161
75
1.86 to 2.27
13200 GRDY/7620
One bushing well
-
-
120/240*
Three CU stud
Internal
-171
100
TBD
13200 GRDY/7620
One bushing well
-
-
120/240*
Three Eyebolt
Internal
-174
100
TBD
13200 GRDY/7620
One bushing well
2-2%
2-211%%
120/240
Four 6 hole "J"
Internal
-175
100
TBD
7620/13200Y
Two bushing wells
2-2%,%
2-2%%
120-240
Four 6 hole "J"
S
-176
100
TBD
13200 GRDY/7620
One bushing well
2-2%%
2-2%%
277
Two 4 hole "H"
Internal
-177
100
TBD
7620113200Y
Two cover mounted
bushing wells
2 2%%
2-2%%qGRD2y4OO
wo cover
ounted
shing wells
S
-184
167
TBD
13200 GRDY/7620
One bushing well
2-2%%
2-2%%r
6 hole "J"
Internal
-185
167
TBD
7620113200Y
Two bushing wells
2-2%%
2-2%%r
6 hole "J"
s
-186
167
TBD
13200 GRDY/7620
One bushing well
2-2Y2
2-2%%
4 hole 'H"
Internal
-189
167
TBD
13200 GRDY/7620
One cover mounted
bushing wells
ne cover
mounted
bushing well
S
-195
250
TBD
7620/13200Y
Two bushing wells
2-2%%
2-2%%
120/240
Four 6 hole "J"
S
-196
250
TBD
13200 GRDY/7620
One bushing well
2-21/%
2-2%x%
277
Two 6 hole "J"
Internal
-231
25
TBD
13200 GRDY/7620x
4160 GRDY/2400
One bushing well
-
-
120/240*
Three Eyebolt
CP
-238
25
TBD
13200 GROY/7620x
4160 GRDY/2400
One bushing well
2-2%
2-2%:%
240/480
Three Eyebolt
CP
-251
50
TBD
13200 GRDY17620X
4160 GRDY/2400
One bushing well
-
-
120/240*
Three Eyebolt
CP
-258
50
TBD
13200 GRDY/7620X
41, GRDY/2400
One bushing well
2-2%%
2-2'%%
240/480
Three Eyebolt
CP
"Reconnectable in field for 120/208 volt service
(1) CP = current -protecting (see para. 3.2.5.1); S = conventional; Internal - current limiting protection (see para. 3.2.5.1)
TBD = To be Determined
7
368-105
Rev. Sym. KK
3.2.6.1 An adequate tank coating for underground vault application shall be provided. Appendix B is provided as a
reference for comparing coating requirements. The Light and Power Department, Engineering Division, is
the only authority regarding the adequacy of proposed coatings. Figure 2 shows outside dimensions.
Figure 2
Maximum Clearance Dimensions inches
WA
A B
C*
75 and below
27 33
44
100 and above
36
3.2.6.2 PRESSURE
The tank shall be equipped with a Qualitrol #202-014-01 or 202-030-01 pressure relief device or a
pressure relief cover. If a pressure relief cover is used, the cover assembly shall remain effectively sealed
for overloads and external secondary short circuits of the magnitude and duration allowed by industry
standards and loading guides, but shall relieve pressure at a minimum of 8 psi gauge if designed to reseal;
or at a minimum of 20 psig if designed for pressure relief without resealing. If a pressure relief cover is
used, a manual means of venting the tank before removal of the cover shall be provided. Regardless of
which means of pressure relief is provided, the tank and other components of the tank shall be of sufficient
strength to withstand, without damage or permanent distortion, the pressures occurring prior to pressure
relief, as well as pressures occurring due to normal overloads and external secondary short circuits.
3.2.6.3 GROUNDING PROVISIONS
A minimum of two tank mounted ground nuts fitted with a solderless type connector for AWG conductor
size No. 8 solid to No. 2 stranded shall be provided. One ground connector shall be on the tank sidewall,
near the top of the tank, below the primary bushing and the other shall be near the base, below the primary
bushing.
8
368-105