HomeMy WebLinkAbout102795 WESCO DISTRIBUTION INC - PURCHASE ORDER - 3305524 (2)THE CITY OF FORT COLLINS
UTILITIES
Light and Power Department
P.O. Box 580
Fort Collins, CO 80522
SPECIFICATION NO: 368-1 1 U
TITLE: Single Phase Submersible Cover Mount Transformer
APPROVED BY:
Tim M. Sagen
Standards Engineer Manager
ORIGINATED: June 1999
LAST REVISED: December 15, 2000
REVISION DESCRIPTIONS
REVISION DESCRIPTION
APPROVED
REVISION A
Tim Sagen
• Revised tank material in section 6
Bill Bray
12/15/2000
2
368-110
Specification for Single Phase Submersible Cover Mount Transformer
1 SCOPE
This specification and the accompanying drawing (368-110.dwg) establishes the minimum
requirements for an alternate design to City of Fort Collins Light and Power Specification
368-105 for single phase 60 hertz mineral oil filled self cooled vault type distribution
transformers. The requirements of Specification 368-105 and applicable American National
Standard requirements for distribution transformers shall apply except where specifically
altered by this Specification.
2 PRIMARY
a. 13,200 GRDY/7620, No Taps, Single Voltage
b. Radial feed (1- HV bushing)
c. ESNA long shank wells welded to tank
d. "NO" inserts provided
3 SECONDARY
a. 240/120 volt, 3-wire (3-bushing LV pattern) (exception to 368-105 Table I, cannot be
banked for 3phase 208Y/120 service)
b. X2 internally grounded (clarification to 368-105 paragraph 3.2.4.2)
c. Welded Central Moloney bushings with external epoxy (dia. <1.38 see 368-105 Fig. 1)
d. 5/8" threaded copper stud termination
e. Additive polarity
4 ELECTRICAL REQUIREMENTS
a. Frequency: 60 Hertz
a. KVA: 25, 50, or 75 as requested
b. BIL: 95 kV
c. Impedance Limits:
kVA
Impedance %Z
25
1.77<%Z<2.16
50
1.77 < %Z < 2.16
75
1.86 < %Z < 2.27
3
368-110
5 FUSING (EXCEPTION TO 368-105 TABLE 1)
a. Submersible type bayonet with overload dual sensing fuse element as shown below.
b. RTE ELSP 8.3 kV under oil partial range current limiting fuse as shown below.
c. "NO" low voltage under oil breaker
kVA
RTE Bayonet
I RTE ELSP
25
358C05
40 amp 354304OM61 M
50
358C08
80 amp 354308OM51 M
75
358C10
125 amp 3543125M61 M
6 TANK DESIGN
a. Tank material .105" (12 gauge) stainless steel (Tank - 400CB SST; Cover - 304L SST)
b. Tomko 1720K-1 pressure relief device located on cover
c. Tank drain 1.00" NPT flush coupling with brass pipe plug
d. (2) 1.00" NPT fill couplings located on cover with brass pipe plugs
e. (1) Tomko LG35 sight gauge/oil level coupling
f. (2) V - 13 SST ground pads centered on tank below primary bushing 7" from top and 7"
from base respectively
g. (1)'/2" - 13 SST ground pad on top near primary bushing
h. (1) SST loadbreak type parking stand
i. Cover to be welded to tank
j. Welded base runners
k. (2) Lifting hooks opposite each other welded on the front and backside of the tank near the
top
7 MARKINGS
a. X1, X2 & X3 SST identification tags with black lettering
b. "X2 Int Grid" stenciled in black on cover
c. Bayonet warning decals located near bayonet fuse
d. SST nameplate in accordance with paragraph 3.2.5.6
e. Temporary serial/shipping card attached to tank lift -eye
8 MISC. DESIGN ISSUES
a. Cooling 650C AWR, average ambient 30°C (55°C AWR and 40°C ambient)
b. Final color ASA 70 Gray
c. All exposed parts shall be constructed of corrosion resistant material; e.g., SST, brass, or
plastic
d. Each unit shall be shipped on a two-way pallet with a minimum opening width of 34"
4
368-110
ITEM
01 HIGH VOLTAGE BUSHING WELL
02 LOW VOLTAGE BUSHING (5/9-fi UNC STUM
03 PARKING STAND (LOADBREAK TYPE)
05 STAINLESS STEEL TANK (Tank - 400CB SSTt Cover - 304L SST)
06 LIFTING HOOK
08 SST NAMEPLATE
11 PRESSURE RELIEF DEVICE (TOMCO 1720K-1)
12 1.00-NPT DRAIN PLUG
14 OIL LEVEL GAUGE (TOMCP LG35)
16 1/2-13 UNC SST GROUND PAD
18 SST I.D, TAGS FOR ALL BUSHINGS
21 TRANSFORMER SUPPORT RAILS
31 SUBMERSIBLE BAYONET IN SERIES WITH UNDER OIL
PARTIAL RANGE CURRENT LIMITING FUSE
Post -it® Fax Note 7671
Date
pages)
To ,'^fV-/
From
Co./Dept.
Co.
Phone #
Phone
Fax # 3 L 55 2 v
Fax #
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