1993-157ORDINANCE NO. 93 ~3 7
AN ORDINANCE PROVIDING FOR THE EXPENDITURE OF FUNDS FOR PURCHASES
OF MATERIALS OR EQUIPMENT WHICH ARE AVAILABLE FROM ONLY ONE SOURCE
IN ACCORDANCE WITH THE PROVISIONS OF STATE LAW EXEMPTING SUCH PUR-
CHASES FROM REQUIREMENTS OF COMPETITIVE BIDS; AND PROVIDING AN EF-
FECTIVE DATE.
WHEREAS, Section 252.022 of the Local Government Code provides
that procurement of items that are only available from one source,
including: items that are only available from one source because of
patents, copyrights, secret processes or natural monopolies; films,
manuscripts or books; electricity, gas, water and other utility
purchases; captive replacement parts or components for equipment;
and library materials for a public library that are available only
from the persons holding exclusive distribution rights to the ma-
terials; need not be submitted to competitive bids; and
WHEREAS., the City Council wishes to procure one or more of the
items mentioned in the above paragraph; NOW, THEREFORE,
THE COUNCIL OF THE CITY OF DENTON HEREBY ORDAINS:
SECTION I. That the following purchases of materials, equip-
ment or supplies, as described in the "Purchase Orders" attached
hereto, are hereby approved:
PURCHASE
ORDER NUMBER VENDOR AMOUNT
37057 ADVANCED CONTROL SYSTEM $"=70;:465
37058 GENERAL ELECTRIC $155,110
SECTION II. That the acceptance and approval of the above
items shall not constitute a contract between the City and the
person submitting the quotation for such items until such person
shall comply with all requirements specified by the Purchasing
Department.
SECTION III. That the City Manager is hereby authorized to
execute any contracts relating to the items specified in Section I
and the expenditure of funds pursuant to said contracts is hereby
authorized.
SECTION IV. That this ordinance shall become effective immedi-
ately upon its passage and approval.
PASSED AND APPROVED this the /da of
4'
y 1993.
r
BOB CASTLEBERRY, MAY
ATTEST:
JENNIFER WALTERS, CITY SECRETARY
BY:
APPROVED AS TO LEGAL FORM:
DEBRA A. DRAYOVITCH, CITY ATTORNEY
BY:
.li ~i
DATE: SEPTEMBER 14, 1993
CITY COUNCIL REPORT
TO: Mayor and Members of the City Council
FROM: Lloyd V. Harrell, City Manager
SUBJECT:' PURCHASE ORDER # 37057 - ADVANCED CONTROL SYSTEM
RECOMMENDATION: We recommend Purchase Order #37057 to Advanced Control
System be approved in the amount of $70,465.00.
SUMMARY: This purchase order is for software and hardware associated with an
upgrade of the Supervisory Control and Data Acquisition (SCADA) System utilized
by the Electric Utility Department.
This equipment is proprietary by design, protected by patents and copyrights and
therefore exempt from the bid process. (Texas Local Government Code Chapter
252.022).
BACKGROUND: Purchase Order #37057 Advanced Control Systems; Quotation from
Advanced Control System dated August 5, 1993; Memorandum from R.E. Nelson,
Executive Director of Utilities, dated August 1993 prepared for Public Utility Board.
PROGRAMS, DEPARTMENTS OR GROUPS AFFECTED: Electric Utility Departments.
FISCAL IMPACT: 1992-93 Budget for Capital Equipment acquisition Account #610-
080-0254-9217/9227 balance of $77,287.83.
0spectfully mitted.
00,
Loyd V . Harrell
City Manager
Approved:
Name: Tom D. Shaw, C.P.M.
Title: Purchasing Agent
agenda.609
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I
ADVANCED CONTROL SYSTEMS, INC. QUOTATION
1755 Northwoods Parkway, Norcross, Georgia 30071
P.O. Box 922548, Norcross, Georgia 30092-8346
Ttlephone: (404) 4464854 Far: (404) 448-0957
August 5, 1993
TO: Denton Municipal Utilities
215 East McKinney Street
Denton, Texas 76201
Attn: George Pool
REFERENCE: REQUEST FOR QUOTATION
QUOTATION NO: ECO90593-1
TERMS: DUE UPON RECEIPT OF INVOICE
F.O.B.: NORCROSS, GA
DELIVERY: 120 - 180 DAYS ARO
ITEM QTY DESCRIPTION PRICE TOTAL
1 1 HPM-7000 Master Station Upgrade to ACS S 23,500 S 23,500
RDAC Revision 8.0 to include:
• HP RTE-A, 5270 Operating System
• ACS RDAC Revision 8.0 Operating
System
• HP Documentation
• ACS Documentation
• System Generation
• On-Site Installation and Travel
2 1 To add additional ports for Workstations, CRTs, S 16,265 S 16,265
Printers, etc.:
• 512K Memory per CPU
• HP MUX Card per CPU
• Cabling
• System Generation at Time of Rev. 8
Upgrade
BY:
THIS QUOTA770H CONTAINS P
Y INFORRWA71ON
ADVANCED CONTROL SYSTEMS: QUOTATION
Denton Municipal Utilities ECO80593-1
ITEM QTY DESCRIPTION PRICE TOTAL
OPTION:
3 1 HPM-9000 Model 715/50 Workstation with 16 $ 25,750 $ 25,750
MB RAM, 525 MB Disk, LAN interface, 2 RS-
232 ports, I parallel port, UNIX Operating
System, ISC Terminal Emulation.
• Serial interface to HPM-7000 Master
Station, can replace an Intecolor CRT
(plug compatible to ISC 8810/8815 with
special emulation software) and is
reusable when master station is upgraded
to RPM-9000 system.
• Requires Rev. 8.0 RDAC in HPM-7000
Master Station
4 1 Epson FX-1170 Dot Matrix Printer and ACS $ 1,950 $ 1,950
Software License
5 1 Lotus 1-2-3 for HPM-9000 Workstation $ 3,000 S 3,000
REZ-05 WILL REQUIRE- HPM-9000 RDAC
' ,OPERATING SYSTEM.-
NOTE:
ALL PURCHASE ORDERS SHOULD BE
MAILED TO: SALES ADMINISTRATOR,
P.O. BOX 922548, NORCROSS, GA 30092-
8346
L
THIS QUOTATION CONTAINS PROPRIETARY INFORMA77ON Page 2
DATE: August , 1993
PUBLIC UTILITIES BOARD AGENDA
TO: CHAIRMAN AND MEMBERS OF THE PUBLIC UTILITIES BOARD
FROM: R. E. Nelson, Executive Director of Utilities
SUBJECT: RECOMMENDATION TO ACCEPT PROPOSED ENHANCEMENTS TO UPGRADE
SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA) SYSTEM
RECOMMENDATION:
The Electric Utility Staff recommends the acceptance of the
proposed SCADA System enhancements for a cost of $70,465.
SUMMARY/BACKGROUND:
The SCADA System planning efforts, directed by the Electric
Utility Department, have been toward solving the present and
future needs of the City of Denton Electric System. As a
result of these efforts, a SCADA Master Replacement
Recommendation Study made by Tippett & Gee Engineering, and a
SCADA System Enhancement Proposal by the Electric Utility
Department have evolved.
The Tippett & Gee study concurred with the Electric Staff
findings that the existing SCADA System is approaching the end
of its useful life due to age, capacity, and functional
limitations of the existing computers. Recommendations made
by Tippett & Gee suggest that the City update the present
SCADA system and move toward new standard technologies such as
"Open Systems". The study included a list of potential
suppliers for the replacement services of certain portions of
the Scada System. Quotes from the different suppliers for the
recommended changes where also listed. The quote from
Advanced Control Systems (ACS), the present SCADA Supplier, is
$750,000. This cost includes only equipment costs and no
other costs associated with consulting services, staffing and
distribution switch automation etc.
After careful consideration of the recommendations by Tippett
& Gee, the Electric Utility Staff proposes enhancements be
made to the existing system in order to:
extend the life of the existing system and defer a costly
$750,000 total replacement;
solve some of the current capacity and functional
limitations of the present system; and
provide a low-risk migration path to newer technologies
such as UNIX and Open Systems.
The proposed enhancements consist of software and hardware
productivity tools, many of which will be usable in the future
total replacement. These tools will improve printing,
reporting, load management, automation, reliability of service
to customers and operational safety. A more detailed and
PUB ITEM
Page 2
SCADA Enhancements
specific project objectives list intended out of the SCADA
system enhancements proposed for fiscal year (92-93) are
provided in Attachment A.
The enhancements will also allow the necessary planning time
needed for implementing a total SCADA system replacement in
conjunction with the future dispatch center.
As of today there have been very few SCADA "Open Systems" sold
on the market. It is advisable to wait, if possible, before
committing to the new "Open System" emerging technology until
it settles and matures.
The new proposed UNIX workstation will provide an interface to
other systems and 'programs, such as GIS and Lotus 1-2-3.
During this process the Electric Utility staff will be
developing the needed expertise to deal with the increased
sophistication of the UNIX operating system.
PROGRAMS, DEPARTMENTS OR GROUPS AFFECTED:
Electric Utility Department for Engineering and operations,
and rate payers of the Denton municipal utilities.
FISCAL IMPACT:
The $70,465 expense in included in the 1992-93 fiscal year
budget.
Respectfully submitted,
R. E. Nelson
Executive Director of Utilities
Prepared by:
George Pool,
Engineering Associate
Approved by:
Jim Harder,
Director of Electric Utilities
Attachment I - SCADA Enhancement Proposal
SCADA.PUB
ATTACHMENT A
The final overall project objectives for the SCADA System
enhancements proposed for this fiscal year (92-93) are as follows:
• Solve the memory problem limitations of the present SCADA
system;
• Improve the computing performances of the SCADA system master
station;
• Improve the printing capabilities of the system by adding
print routing, batch printing by spooling, color printing,
etc.;
• Improve alarm message processing, data file access, built on
display, accuracy of telemetry table readings, operational
flexibility and man-machine interface, etc.;
• Stretch the life of the existing system to maximize the return
on investment;
• Provide a low-risk migration path to newer technologies such
as UNIX and Open Systems;
• Develop in-house expertise on database management, system
programming, UNIX, and computer system administration
functions;
• Provide secure data access from SCADA to other computer
systems and programs such as Lotus 1-2-3, GIS, Engineering
Analysis, PC's, etc.;
• Improve and automate SCADA reporting capabilities for Power
Plant control center personnel, Engineering, Planning and
Management, etc.;
• Increase SCADA system interaction by providing a higher degree
of autonomy and flexibility to other departmental. SCADA users;
• Provide a developing platform for Engineering to work on
building a GIS to SCADA interface;
• Establish a migration platform for subsequent SCADA system
enhancements and build on applications such as multi-vendor
protocol RTU communications; sequence of events; and improved
Man-Machine Operator Interface; etc.
7133027
DATE: SEPTEMBER 14, 1993
CITY COUNCIL REPORT
TO: Mayor and Members of the City Council
FROM: Lloyd V. Harrell, City Manager
SUBJECT: PURCHASE ORDER # 37058 TO GENERAL ELECTRIC
RECOMMENDATION: We recommend purchase order #37058 to General Electric be
approved in the amount of $155,110.00.
SUMMARY: This purchase order is for purchase if new retaining rings for Spencer
Unit #3 Generator.
Unit three was originally manufactured in 1961 by General Electric. After a recent
review by General Electric there are indicators of a potential problems with the
retaining rings of the generator field. General Electric recommends replacement with
rings made of 18% Manganese and 18% Chromium Steel.
Nonmagnetic generator retaining rings have been in general use by GE and other
generator manufactures since the late 19501s. Most of these have been made from an
18% Manganese - 5% Chromium steel. Experience since that time indicates that this
material, regardless of manufacturer, is susceptible to stress-corrosion cracking
(SCC). Several rings on other manufacturers' units have failed in service, with
considerable damage to both the units and surrounding equipment.
GE initiated a periodic field inspection program following a number of incidents of
SCC of GE retaining rings. GE recommends replacement of 18% Manganese - 5%
Chromium steel retaining rings based on the following concerns:
* 18% Manganese - 5% Chromium steel is inherently susceptible to SCC
when exposed to water and certain corrosive elements.
* Because SCC can be initiated by water alone, it is very difficult to
protect the rings at all times. Accidents, including water leaks, can
and will happen.
* Once cracks are initiated, they can propagate rapidly and
unpredictably. Therefore, any cracks and pits must be removed as
soon as detected.
* Cracks are extremely difficult to detect, due to large grain size,
tightness of cracks, and inaccessibility of critical areas on the inside
diameter.
* At present, there is no generally accepted method of monitoring crack
development while a unit is operating. Cracks can propagate rapidly
during operation.
* The replacement material 18% Manganese - 18% Chromium steel, has the
required properties of thermal capabilities, toughness, strength and
high resistance to SCC.
City Council Report
September 14, 1993
Page 2 of 2
These rings are only available from the original manufacturer and therefore exempt
from the bid process (Texas Local Govt Code Chapter 252.022).
BACKGROUND: Purchase Order #37058 to General Electric; Quotation from General
Electric #832646QC.
PROGRAMS, DEPARTMENTS OR GROUPS AFFECTED: City of Denton Electric
Utility, Electric Production Division.
FISCAL IMPACT: 1992-93 Budget Funds for.Maintenance of Generating Equipment
Account #610-080-0251-8339.
e ~u11 bmit
Lloyd V. Harrel
City. Manager
Approved:
Name: Tom D. Shaw,C.P.M.
Title: Purchasing Agent
agenda.414
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GE POWER GENERATION
SCHENECTADY, NY
08/12/93
YOUR REF NUMBER:
TURBINE NUMBER :
QUOTE EXPIRES .
QUOTATION PREPARED FOR CITY OF DENTON
PAGE 001
DUWAIN CORBELL GE REF NUMBER : 832646QC
0137431 GE DIST DOC NBR: 417R93012755A1
10/15/93
PRIORITY S
CUST
GE
UNIT
EXTENDED
ITM
ITM QTY UM DESCRIPTION
PRICE
PRICE SCHED
001 001 1 ST ONE SET 18-18 RET RING 145616.00 145616.00 20 WKS
DWG: SRR-CF-05-309-S
CUST-- DWG.: RETAINING-RINGS - - -
THIS DWG IS USED FOR QUOTING OR ACKNOWLEDGMENT
PURPOSES ONLY. WHEN AN ORDER IS RECEIVED, THE
ACTUAL DWG TO BE SUPPLIED WILL BE IDENTIFIED.
THE SELLING PRICE IS VALID FOR THIS QUOTE/ORDER
ONLY.
ONE (1) LOT OF 18/18 RETAINING RINGS FOR TE & CE
WITH NECESSARY MATERIAL TO INSTALL.
ONE SET EQUALS TWO FINAL MACHINED SPINDLE MOUNTED
RETAINING RINGS MADE FROM THE COMPOSITE FORGINGS FOR
THIS SIZE MACHINE.
001 002 1 LT RET RING INSTALL KIT 9494.00 9494.00 12 WKS
DWG: SRRI-MODEL-309-S
THIS DWG IS USED FOR QUOTING OR ACKNOWLEDGMENT
PURPOSES ONLY. WHEN AN ORDER IS RECEIVED, THE
ACTUAL DWG TO BE SUPPLIED WILL BE IDENTIFIED.
THE SELLING PRICE IS VALID FOR THIS QUOTE/ORDER
ONLY.
RETAINING RING INSTALLATION KIT TO INCLUDE TWO SETS OF
RETAINING RING INSULATION AND ALL NECESSARY EXPENDABLE
HARDWARE AND MATERIAL NEEDED TO INSTALL A SET OF SPINDLE
MOUNTED RETAINING RINGS.
TOTAL VALUE U.S. DOLLARS: 155110.00
NOTES:
SUBJECT TO PRIOR SALE. SCHED IS AN ESTIMATE BASED UPON
RECEIPT OF ORDER AND COMPLETE INFORMATION AT THE FACTORY.
TAXES ON THIS ORDER ARE CURRENTLY CODED AS EXEMPT DUE TO
SALES TO FEDERAL, STATE AND LOCAL GOVERNMENT.