HomeMy WebLinkAboutAgenda Report - August 15, 1990 (36)RECOMMENDED ACTION: That the City Council approve the specifications
and., authorize,-advert'sement for bids for the pqrcl ase of two 1200KVAR
Capacffor Ba ks
i
NORMAThepcia4d[ f6rnstallation at various locations throughodt the city to improve
electrical system polder factors and voltages, and to maintain high
service levels during periods of peak demand.
Tk6.estlmated cost of this purchase is $9,000, with delivery expected
ab6uiJ61 eeks., af ter placement of order. Funding is avaiiable in the
Electrit' Utility Deja rtment's operating Fund.
6 - I 'd is et for Wednesday, September 5, 1990.
The bid opening
E.
Harris
Murc asing Officer
cc: Electric Utility Director
Assistant Electric Utility Director
Electrical Engineer
EQUIPMENT SP -CC IVCATIONS
124CV CAPACITORS
A GENERAL
Capacitor banks shall be rated 1200 KYAR and be utilized on a 12,0-kv
(nominal) system. The banks shall consist of six (6) individual, two .(2)
bushing, ;7.2-kv,. 200 WAR single-phase capacitors connected in a floating
(ungrounded) Wye.
B. REQUIREMENTS FOR CAPAC M UNITS
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1. Capacitor-_ units shall be manufactured and tested in accordance withl ANSI
Standard C55.1 (latest revision) and ANSI Standard 055.2 (latest
revision).
2. Ratings - Each individual capacitor shall be rated as follows:
r
° 200 KYAR (nominal) '
0 7200 volts ,
0 95-kv B i 1 (minimum)
3. Construction - Each individual capacitor shall be constructed as follows:
° Paint Color: ANSI 70 Gray
0
Capable of mounting with NEMA standard 15.62" centers.
Bushing creepage shall be 10" (minimum).
O -
Each bushing shall include an insulating terminal cover.
C Capacitors shall contain NO PCB's.
All film foil construction
Two (2) bushings
4. Capacitor losses shall not exceed 0.2 watts/KVAR. This value is based
upon being energized at rated voltage in a 40° C ambient temperature.
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5. The internal corona starting voltage or ionization level shall not be less
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2. Oil switches must be electrically and mechanically interchangeable and
supplied with 5 -conductor plug and receptacle. Control wiring to be
factory assembled with switch controls wired and terminated on a terminal
board located n a weatherproof, frame -mounted junction box. Acceptable
a1`.-sw aches are
Westinghouse CSR
General Electric 9F90DSF142
3. Capacitor switches- .;shalI be insulated from ..the rack by means of Stand-off
insulators. Minimum creepage of capacitor switch insulators shall be ten
(10) inches.
4. Means for grounding:ahe switch tanks .,only shall be provided.
5. Grounding connector for switch tank shall be of a materiel compatible with z
switch tank finish.
F. Ground lead shall consist of 600 -volt insulated copper, minimum of No. 6
AWG and shall be insulated from the rack with Schedule 80 PVC conduit.
7. Switch leads shall have three (3) inches bare section on load side to
pe rm i t'" a t to c hme n t of grounds wbm required.
E QUOTATION AKD DRAWING REQUIREMENTS
1. For evaluation purposes, each bid shall be accompanied by the following
information for each capacitor unit:
a. Loss versus temperature.
b. Capacitance versus temperature.
c. Corona starting voltage versus temperature.
d. Maximum and average watts loss from actual production.
e. Safe time verses current plots or allowable i't values.
f. Dielectric stress in volts/mil
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g. Plumber of series - parallel- sections and the section voltage at rated
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