1、*USACE / NAVFAC / AFCEC / NASA UFGS-33 77 19.00 40 (August 2013)-Preparing Activity: NASA SupersedingUFGS-33 77 19.00 40 (August 2010)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2013*SECTION TABLE OF CONTENTSDIVISION 33 - UTILITIESSECTION 33 77 19.00 40MED
2、IUM-VOLTAGE GAS SWITCH08/13PART 1 GENERAL1.1 REFERENCES1.2 SUBMITTALS1.3 PREDICTIVE TESTING AND INSPECTION TECHNOLOGY REQUIREMENTS1.4 MAINTENANCE MATERIALS SUBMITTALSPART 2 PRODUCTS2.1 EQUIPMENT2.1.1 Switches2.1.2 Space Heaters2.1.3 Mounting Frames2.2 ACCESSORIES2.3 FACTORY FINISH2.4 TESTS INSPECTIO
3、NS, AND VERIFICATIONS2.4.1 Factory Information2.4.2 ShippingPART 3 EXECUTION3.1 INSTALLATION3.1.1 Coordination3.1.2 Grounding3.2 FIELD TESTING- End of Section Table of Contents -SECTION 33 77 19.00 40 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS
4、-,-,-*USACE / NAVFAC / AFCEC / NASA UFGS-33 77 19.00 40 (August 2013)-Preparing Activity: NASA SupersedingUFGS-33 77 19.00 40 (August 2010)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2013*SECTION 33 77 19.00 40MEDIUM-VOLTAGE GAS SWITCH08/13*NOTE: This guid
5、e specification covers the requirements for the requirements for 5k through 38 kV, 600A load-break sulphur hexafluoride (SF6) gas switches. On drawings, indicate subsurface, vault, pad-mount, indoor, metal-enclosed, or pole mounted type; the number of switched ways; separable connections; and single
6、-side, double-side, floor, wall, ceiling, or other type installation.Adhere to UFC 1-300-02 Unified Facilities Guide Specifications (UFGS) Format Standard when editing this guide specification or preparing new project specification sections. Edit this guide specification for project specific require
7、ments by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information.Remove information and requirements not required in respective project, whether or not brackets are present.Comments, suggestions and recommended changes for this guide spec
8、ification are welcome and should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL*NOTE: If Section 26 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS is not included in the project specification, insert applicable requirements therefrom and delete the following paragraph.*Section 2
9、6 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS, and Section26 05 70.00 40 HIGH VOLTAGE OVERCURRENT PROTECTIVE DEVICES and Section 26 05 71.00 40 LOW VOLTAGE OVERCURRENT PROTECTIVE DEVICES apply to work specified in this section.SECTION 33 77 19.00 40 Page 2Provided by IHSNot for ResaleNo repro
10、duction or networking permitted without license from IHS-,-,-1.1 REFERENCES*NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designa
11、tion, date, and title.Use the Reference Wizards Check Reference feature when you add a RID outside of the Sections Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizards Check Reference feature to update the issue dates.References not used in
12、the text are automatically deleted from this section of the project specification when you choose to reconcile references in the publish print process.*The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the ba
13、sic designation only.AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)ANSI C37.72 (1987) Standard for Manually-Operated Dead-Front Pad Mounted Switchgear with Load Interrupting Switches and Separable Connections for Alternating-Current SystemsASTM INTERNATIONAL (ASTM)ASTM A123/A123M (2012) Standard Speci
14、fication for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel ProductsASTM A153/A153M (2009) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel HardwareASTM D2472 (2000; R 2006) Standard Specification for Sulphur HexafluorideINSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEE
15、E)IEEE 386 (2006; INT 1 2011) Standard for Separable Insulated Connector Systems for Power Distribution Systems Above 600VIEEE C57.12.28 (2005; INT 3 2011) Standard for Pad-Mounted Equipment - Enclosure IntegrityNATIONAL AERONAUTICS AND SPACE ADMINISTRATION (NASA)RCBEA GUIDE (2004) NASA Reliability
16、Centered Building SECTION 33 77 19.00 40 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-and Equipment Acceptance Guide1.2 SUBMITTALS*NOTE: Review Submittal Description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the foll
17、owing list to reflect only the submittals required for the project.The Guide Specification technical editors have designated those items that require Government approval, due to their complexity or criticality, with a “G.“ Generally, other submittal items can be reviewed by the Contractors Quality C
18、ontrol System. Only add a “G” to an item, if the submittal is sufficiently important or complex in context of the project.For submittals requiring Government approval on Army projects, use a code of up to three characters within the submittal tags following the “G“ designation to indicate the approv
19、ing authority. Codes for Army projects using the Resident Management System (RMS) are: “AE“ for Architect-Engineer; “DO“ for District Office (Engineering Division or other organization in the District Office); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ for Project Office. Codes followi
20、ng the “G“ typically are not used for Navy, Air Force, and NASA projects.Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army projects.*Government approval is required for submittals with a “G“ designation; submittals not having a “G“ de
21、signation are for Contractor Quality Control approval.for information only. When used, a designation following the “G“ designation identifies the office that reviews the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:SD-02 Shop DrawingsCon
22、nection Diagrams; G; G, _Load- Break Switches; G; G, _SD-03 Product DataSF6 Load-Break Switches; G; G, _Space Heaters; G; G, _Mounting Frames; G; G, _Accessories; G; G, _SECTION 33 77 19.00 40 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SD-
23、06 Test ReportsBasic Impulse Insulation Level (BIL); G; G, _Withstand Voltage Rating; G; G, _Momentary RMS Asymmetrical Rating; G; G, _Leak Tests; G; G, _Final Test Reports; G; G, _SD-10 Operation and Maintenance DataSwitches; G; G, _Space Heaters; G; G, _1.3 PREDICTIVE TESTING AND INSPECTION TECHNO
24、LOGY REQUIREMENTS*NOTE: The Predictive Testing and Inspection (PT&I) tests prescribed in Section 01 86 26.07 40 RELIABILITY CENTERED ACCEPTANCE FOR ELECTRICAL SYSTEMS are MANDATORY for all NASA _ assets and systems identified as Critical, Configured, or Mission Essential. If the system is non-critic
25、al, non-configured, and not mission essential, use sound engineering discretion to assess the value of adding these additional test and acceptance requirements. See Section 01 86 26.07 40 RELIABILITY CENTERED ACCEPTANCE FOR ELECTRICAL SYSTEMS for additional information regarding cost feasibility of
26、PT&I.*This section contains systems and/or equipment components regulated by NASAs Reliability Centered Building and Equipment Acceptance Program. This program requires the use of Predictive Testing and Inspection (PT&I) technologies in conformance with RCBEA GUIDE to ensure building equipment and s
27、ystems have been installed properly and contain no identifiable defects that shorten the design life of a system and/or its components. Satisfactory completion of all acceptance requirements is required to obtain Government approval and acceptance of the work.Perform PT&I tests and provide submittal
28、s as specified in Section 01 86 26.07 40 RELIABILITY CENTERED ACCEPTANCE FOR ELECTRICAL SYSTEMS.1.4 MAINTENANCE MATERIALS SUBMITTALSSubmit operation and maintenance manuals for switches, and space heaters.PART 2 PRODUCTS2.1 EQUIPMENT2.1.1 SwitchesProvide detail drawings that show mounting details an
29、d configuration for SECTION 33 77 19.00 40 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-load-break switches.Provide gas insulated load-break switches of the subsurface pad-mounted vault _ type in accordance with ANSI C37.72 and IEEE 386.Prov
30、ide sulphur hexafluoride (SF6) gas in accordance with ASTM D2472.Provide manually operated, load-interrupting type SF6 load-break switches, rated 15 _ kV 600 _ amperes, minimum, continuous and load break for operation on a 12.47 _ kV, 3-phase, 3-wire system.Provide switch enclosures in accordance wi
31、th IEEE C57.12.28 equipped with ground bus capable of carrying the rated fault current for one second for each way.Provide each switch with pressure gage, position viewing window and fill plug.Provide lockable incoming line position of switches to prevent unauthorized grounding.Provide cable and cab
32、le terminations in accordance with Section 26 05 13.00 40 MEDIUM-VOLTAGE CABLES. Equip switches with 600 amperes and bushings with inserts to accept load break elbows, as indicated.Provide cable terminations from the fuse compartment that are preformed stress-cones or have deep-well apparatus bushin
33、gs in accordance with IEEE 386.Provide provisions for padlocking each handle in any position.Provide switch tanks that are constructed of stainless steel plate, fully TTG welded.Provide operating mechanisms that are equipped with handles for manual operation and are operated by a non-teasible, snap-
34、action, quick-make, quick-break. Make opening and closing of the main contacts totally independent of the speed or position of the operating handle. Secure operating handle to the shaft in a manner that ensures tightness and alignment.2.1.2 Space HeatersPermanently mark connection diagrams for heate
35、r connections on drawings and shipping covers.*NOTE: Space heaters are seldom required with SF6 switches. Choose the following paragraphs only when metal enclosed SF6 switch/fuse modules are used and where moisture could condense on components in air-filled compartments.Wattage supplied by heaters i
36、s one-fourth of the heater nameplate rating when 240-volt heaters are operated at 120 volts.*Equip ventilated cable termination compartment and the fuse compartment on SECTION 33 77 19.00 40 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-outdo
37、or switches with externally energized space heaters to provide approximately 40 _ watts/square meter 4 _ watts/square foot of outer surface area. Provide heaters that have a power density that does not exceed 4 _ watts per 650 square millimeter 4 _ watts per square inch of heater element surface. Pr
38、ovide heaters that are rated at 240 _ volts for connection at 120 _ volts. Locate heaters at the lowest portion of each space to be heated. Cover terminals. Use thermostats to regulate the temperature.Provide installed and operable heaters at the time of shipment so that the heaters can be operated
39、immediately on arrival at the site, during storage, or before installation. Mark connection locations prominently on drawings and shipping covers with temporary leads for storage operation easily accessible without removal of shipping protection.2.1.3 Mounting Frames*NOTE: Choose the following parag
40、raphs when pad-mounted switches are used. Subsurface switches do not require frames since they mount directly to the floor, walls, or ceiling.*Furnish mounting frames that are of angle-iron construction, for all pad _ -mounted switches and are hot-dipped galvanized after fabrication in accordance wi
41、th ASTM A123/A123M ASTM A153/A153M.After fabrication, clean and paint all exposed ferrous metal surfaces of the pad mount enclosure.Paint mounting frames in accordance with ANSI C37.72.2.2 ACCESSORIESProvide fittings, lifting eyes, insulators, and other required accessories with the switch as necess
42、ary.Provide all corrosion-resistant metal operating parts of switch assemblies.Provide switches with suitable attachments to permit closing and opening under full rated load current, without damage.Provide fuses located in a separate compartment on the outgoing feeders as indicated and per Section 2
43、6 05 70.00 40 HIGH VOLTAGE OVERCURRENT PROTECTIVE DEVICES and Section 26 05 71.00 40 LOW VOLTAGE OVERCURRENT PROTECTIVE DEVICES. Interlock fuse-compartment doors with switch mechanisms.Provide switches with a visible break option that allows direct viewing of the switch contacts in the open and closed positions within the switch tank.2.3 FACTORY FINISH*NOTE: For all outdoor applications and all indoor applications in a harsh environment refer to Section 09 96 00 HIGH-PE
