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TECHNICAL SPECIFICATION FOR 138kV 31.2 MVAR, 138kV 15.6 MVAR, 69kV 15.6 MVAR & 69kV 7.8 MVAR SHUNT POWER CAPACITORS LOWER COLORADO RIVER AUTHORITY SPECIFICATION FOR 138kV 31.2 MVAR, 138kV 15.6 MVAR, 69kV 15.6 MVAR & 69kV 7.8 MVAR SHUNT POWER CAPACITOR SPECIFICATION NO. 582B DATE: January 1, 2016 1.00 ITEMS: Capacitor, Power, Shunt 138kV 31.2MVAR Capacitor, Power, Shunt 138kV 15.6MVAR Capacitor, Power, Shunt 69kV 15.6MVAR Capacitor, Power, Shunt 69kV 7.8 MVAR 2.00 SCOPE: This specification establishes minimum standard requirements for the design, construction, testing, and supplementary requirements for 138kV and 69kV maximum voltage class outdoor, open rack power capacitors intended for shunt connection to alternating current transmission system. The capacitor bank shall be supplied complete with capacitor units, elevating structure, mounting frames, buss work, connection provisions, hardware and all spacing/base support insulators. All banks should be designed for a grounded single wye configuration that will be switched daily. 3.00 USE: The equipment specified herein is to be used for an electric utility's transmission system to aid in improving the system operating profile throughout the Central Texas area. 4.00 APPLICABLE STANDARDS: The latest revision of the following standards shall apply to this Specification as well as any standard referred to herein. 4.01 Industry Standards 2 4.01.01 Institute of Electrical Electronic Engineers (IEEE) 18-2012 Standard for Shunt Power Capacitors. 4.01.02 (IEEE) 37.41e – 1996, IEEE Standard Design Tests for External Fuses for Shunt Capacitors. 4.01.03 (IEEE) C57.19 – 2004 IEEE Standard General Requirements and Test Procedures for Outdoor Power Apparatus Bushings. 4.01.04 (IEEE) 37.99 – 2012, IEEE Guide for Protection of Shunt Capacitor Banks. 5.00 6.00 4.01.05 (IEEE) 1036 – 2010, IEEE Guide for Application of Shunt Power Capacitors. 4.01.06 NFPA 70-2002, National Electrical Code (NEC) GENERAL: 5.01 Items furnished under this specification shall in all respects meet the dimensional and performance requirements hereinafter stated and as stated in the above standards or the references therein. 5.02 The requirements specifically stated herein shall govern should there be any conflict with the above standards or the references therein. 5.03 All items of the same design and rating furnished shall be mechanically and electrically interchangeable. CLASSIFICATION AND RATING: 6.01 Shunt power capacitors shall be classified for outdoor use. 6.02 Capacitors shall be designed for continuous operation at a minimum ambient temperature of -400 C and a maximum +400 C. 6.03 Capacitors shall be designed for switched or continuous operation with unrestricted ventilation and direct sunlight under the ambient temperatures listed in IEEE 18-2012, Section 5.7.1. 6.04 Capacitors shall give not less than the rated reactive power at rated sinusoidal voltage and frequency. Capacitors shall not give more than 110% of the rated reactive power measured at 250 C uniform case and internal temperature. 3 6.05 Capacitors shall be suitable for continuous operation at 135% of rated reactive power. The combined effects listed below shall not exceed 135% of the rated reactive power. This maximum reactive power shall include the following factors. A) Reactive power due to voltage greater than the nameplate rating at fundamental frequency but within the permissible voltage limitations described in section 6.06 below. B) Reactive power due to harmonic voltages superimposed on the fundamental frequency. C) Reactive power greater than the nameplate rating due to manufacturing tolerance within the limits specified in section 6.04 above. 6.06 Capacitors shall be capable of continuous operation provided that none of the following limitations are exceeded: A) 110% of rated RMS voltage B) 120% of rated peak voltage, i.e. peak voltage not exceeding 1.2 x (square root of two) x rated RMS voltage, including harmonics, but excluding transients C) 135% of nominal RMS current based on rated KVAR and rated voltage D) 135% of rated KVAR 6.07 Capacitors shall be capable of withstanding, with full life expectancy, switching transients having crest voltages up to two times the peak of the capacitor rated voltage, and other transient over-voltages and over-currents normally associated with the operation of shunt power capacitors on electric power systems as outlined in IEEE Std 1036-2010. 6.08 Shunt power capacitors shall conform to the voltage and reactive power ratings specified in IEEE 18-2012, Table 1. 6.09 Shunt power capacitors shall comply with the basic impulse insulation level (BIL) specified in IEEE 18-2012, Table 2. 6.10 Shunt power capacitors shall be rated for operation at 60 hertz alternating current. 6.11 Shunt power capacitors shall have the following standard ratings: 4 A) B) C) D) E) Voltage, RMS (terminal-to-terminal), Terminal-to-case (or ground) insulation class, Reactive power, Number of Phases, Frequency. 6.12 Shunt power capacitors shall be rated to meet the in-service conditions specified under IEEE 18-2012, Section 4. 6.13 Radio influence voltage generated by capacitors shall not exceed the value specified in ANSI/IEEE 18-2012, Section 6.4 and the reference therein. 6.14 Shunt power capacitors shall have a one (1) or two (2) bushing design for installation on a single phase Wye grounded system. 6.15 Capacitor bushings shall comply with the minimum electrical characteristics specified under IEEE 18-2012, Table 5. 6.16 Shunt power capacitors shall meet the following requirements: Externally Fused Banks Grounded Single Wye Configuration: A) 138kV, 31.2 MVAR 1 Can - 19.92kV 200KVAR @ 200kV BIL, 60 Hz (4 series, 13 parallel total 52 cans per phase) B) 138kV, 15.6 MVAR 1 Can- 19.92kV 100KVAR @ 200kV BIL, 60 Hz (4 series, 13 parallel total 52 cans per phase) C) 69kV, 15.6 MVAR 1 Can- 19.92kV 200KVAR @ 200kV BIL, 60Hz (2 series, 13 parallel total 26 cans per phase) Fuseless Banks Grounded Single Wye Configuration: A) 138kV, 31.2 MVAR 1 Can - 19.92kV 650KVAR @ 150kV BIL, 60 Hz (4 series, 4 parallel total 16 cans per phase) B) 138kV, 15.6 MVAR 5 1 Can- 19.92kV 650KVAR @ 150kV BIL, 60 Hz (4 series, 2 parallel total 8 cans per phase) C) 69kV, 15.6 MVAR 1 Can- 19.92kV 650KVAR @ 150kV BIL, 60Hz (2 series, 4 parallel total 8 cans per phase) D) 69kV, 7.8 MVAR 1 Can- 19.92kV 650KVAR @ 150kV BIL, 60Hz (2 series, 2 parallel total 4 cans per phase) 6.17 7.00 Fusing Size based on manufacturer recommendation. CONSTRUCTION: 7.01 Capacitors shall be thermally stable in accordance with the definition and operating conditions outlined in IEEE Std. 18-2012, Section 7.1.3. 7.02 Capacitors shall not be damaged by partial discharges when energized under any conditions of ambient temperature or continuous voltage permitted in accordance with IEEE 18- 2012. 7.03 Capacitors shall be equipped with an internal discharge resistor which will reduce the residual voltage to 50 volts or less within five (5) minutes of time limit after the capacitor is disconnected from the rated voltage. 7.04 Capacitors shall have a No. 409 stainless steel casing (shell). Capacitors shall be hermetically sealed by welding or solder seal process. 7.05 Capacitors shall be painted ANSI 70, sky gray. Capacitors shall comply with the finish requirements stated in ANSI Z55.1. 7.06 Capacitors shall have heavy duty stainless steel mounting brackets. The bracket dimensions shall comply with the requirements specified in IEEE 18-2012, Section 6.9. The mounting contact surface shall be unpainted to assure positive grounding to the frame or hanger. 7.07 Capacitors shall have an all film/foil-type design and shall be impregnated with a dielectric fluid. Paper type design shall not be acceptable. 7.07a The dielectric film stress shall not exceed 2000 volts per mil when the capacitor is energized at rated voltage. The dielectric film stress shall be calculated using the dry thickness of the dielectric film. Rated voltage of 6 each element shall not exceed 2000 volts. Lower stresses may be specified by the LCRA as determined by electrical conditions at the planned location. 7.08 Capacitor fluid shall be low toxicity and biodegradable with high dielectric strength and temperature stability. Capacitors shall be free of PCB (Polychlorinated-biphenyl). 7.09 Capacitors shall have one or two glazed wet processed porcelain insulator bushings that comply with the (BIL) requirements specified herein. 7.10 Capacitor bushing(s) shall have a tin or Cadmium plated parallel groove connector. The connector's clamping range shall accommodate conductor sizes ranging from number 8 AWG solid through number 2 AWG stranded conductor. 7.11 Each capacitor shall have a permanent weather resistant name plate. The name plate shall clearly state the following information: A) B) C) D) E) F) G) H) I) Name of Manufacturer, Unique serial number, Manufacturers type, model, style, or catalog number. Year manufactured, Rated reactive power, Rated voltage RMS, Number of phase, Rated frequency, BIL (if applicable). For capacitors having bushings with two different BIL ratings, the nameplate shall show both BIL ratings, e.g. 150/95 kV BIL. J) Flammability classification and volume of insulating fluid. K) Statement that capacitor contains an internal discharge device. L) Nominal or measured capacitance, µF 7.12 The manufacturer shall attach a weather resistant blue label or decal indicating non-PCB. This information shall be located where it can be seen from the ground. 7.13 Terminal "bird guards" are not required on capacitors unless specified by the purchaser. 7.14 When units are to be supplied in banks, the capacitors shall be individually fused with indicating expulsion fuse units (For Externally Fused Banks). 7.15 When substation banks are requested, the following spare equipment is required and shall be included in the total quoted cost: 7 Externally Fused Banks: # OF INDIVIDUAL INDICATING EXPULSION FUSE ASSEMBLIES # OF FUSE LINKS 10 10 Capacitor units: 1 spare can for each 20 cans installed Fuseless Banks: Capacitor units: 1 spare can for each 6 cans installed LV Capacitor units: 1 spare can for each 6 cans installed LV Resistor: 1 spare resistor for each 3 resistors 7.16 When substation substructures are required, the following shall be provided and the price shall be included in the quoted cost: A) 138kV Banks: The 138kV bank assembly will consist of 3 stacks for three phase operation. Steel frames (racks) shall be hot-dipped galvanized after fabrication and conform to ASTM-A37. The manufacturer shall supply a twelve (12) foot high substructure for ground clearance, high strength base, stacking insulators, and all necessary bus work. The capacitor bank shall be designed to handle continuous wind loading of 110mph with a gust factor of 1.3 without damage. All connections in the structure will be made with through bolt connections using nuts and bolts, screw type connections are not acceptable. The shunt capacitor bank shall be outdoor, open structured type with capacitors connected in series and parallel groups. All hardware and materials for electrical and mechanical connections shall be furnished with the capacitor bank. Each capacitor bank shall have spare units mounted in open slots in the bottom rack of each phase. The bushings of each spare unit shall be shorted together and connected to the frame with an insulated conductor. The total number of spare units for each bank shall be as specified in 7.15 of this specification. The spare units shall be evenly distributed between the bottom racks of each phase. B) 69kV Banks: 8 The 69kV bank assembly will consist of 1 stack for three phase operation. Steel frame (rack) shall be hot-dipped galvanized after fabrication and conform to ASTM-A37. The manufacturer shall supply a twelve (12) foot high substructure for ground clearance, high strength base, stacking insulators, and all necessary bus work. The capacitor bank shall be designed to handle continuous wind loading of 110mph with a gust factor of 1.3 without damage. All connections in the structure will be made with through bolt connections using nuts and bolts, screw type connections are not acceptable. The shunt capacitor bank shall be outdoor, open structured type with capacitors connected in series and parallel groups. All hardware and materials for electrical and mechanical connections shall be furnished with the capacitor bank. Each capacitor bank shall have spare units mounted in open slots in the bottom rack of each phase. The bushings of each spare unit shall be shorted together and connected to the frame with an insulated conductor. The total number of spare units for each bank shall be as specified in 7.15 of this specification. The spare units shall be evenly distributed between the bottom racks of each phase. 7.17 Two ground pads, each with two holes drilled to NEMA spacing, shall be provided on diagonally opposite sides of the elevating structure for grounding. 7.18 The structure shall include appropriate means for mounting and connecting capacitor units. They should also include a terminal pad for the incoming cable phase connections. 7.19 All base insulators shall be high strength porcelain, post type, gray and per ANSI standards. Inter-rack insulators shall be standard strength (middle rack) and standard strength (top rack). 7.20 The buss shall be rated for a maximum temperature rise of 30 0C in an ambient of 400C at 135% rated current. 7.21 The structure shall be provided with a capacitor bank nameplate mounted at eye level in a convenient location. The nameplate shall include bank rated voltage, bank BIL, bank KVAR, bank connection (grounded wye), and bank type (fused or fuse less). 7.22 Each rack shall be equipped with a warning sign on all four sides reading “CAUTION! FRAME ENERGIZED” or similar wording. 9 8.00 7.23 Anchor bolts with hex nuts and washers shall be supplied by the foundation installer. 7.24 Clamp connectors shall be provided for the capacitor terminals in accordance with IEEE STD 18-2012, Section 6.6. BANK PROTECTION: 8.01 The manufacturer shall supply the following components for each capacitor bank ordered, to be used in protection scheme. Externally Fused Bank Protection (Neutral to Ground CT Protection Scheme) 1 - Mounting bracket for Current transformer. 1 - CT, 15 KV, dual ratio 20/10:5 ratio, 110 KV BIL 1 - CT primary spark gap – for protection of the primary winding of the CT. Fuseless Bank Protection (Neutral to Ground CT Protection Scheme, Unbalance Voltage Protection Scheme) 1 – Mounting bracket for Current transformer and PT 1 – CT, 15 KV, dual ratio 20/10:5, 110 KV BIL 1 – CT primary spark gap – for protection of the primary winding of the CT. 3 – PT, 800/250, 95 kV BIL (Dry Type) 1 – Unbalance Protection Junction Box (Shielded cables to PT/CT) 3 – Resistor, 100 ohm, 10 Watts, install in series with PTs 1 – Low Voltage Capacitor, 167 kvar, 825V, 95kV BIL, install in parallel with PTs (Note: 1 for 15.6 MVAR Banks, 2 for 31.2 MVAR Banks) 9.00 DRAWINGS AND INSTRUCTION MANUALS: All drawings and instruction manuals shall be submitted in accordance with the following. 9.01 Approval Drawings (AutoCAD 2012 electronic files shall be sent electronically via e-mail.) The manufacturer shall furnish for approval on AutoCAD 2012 electronic file and six (6) paper copies each of the following drawings: 10 A) B) C) D) E) F) G) 9.02 Outline dimensions of capacitor, Insulators, Mounting brackets, Outline dimension showing stacked capacitors, Fuse link (recommended), Manufacturers Catalog Number. Nameplate Information Final Drawings Once LCRA comments and corrections have been taken from the drawings listed in Section 9.01, final drawings shall be submitted. AutoCAD 2012 Electronic files shall be submitted via e-mail and CD-ROM formats. Note: 9.03 Drawings submitted shall be unique drawings customized for LCRA including all options and excluding any options which are not requested in these Specifications. "Typical" drawings are not acceptable. AutoCAD-generated drawings shall also be provided. Instruction Manuals Any applicable instruction manuals shall be provided with the final drawings via e-mail and CD-ROM formats. Any service advisories shall be sent to the Manager of Construction Maintenance. 9.04 Service Bulletins The Contractor shall be responsible for providing any and all service bulletins/advisories on equipment provided after delivery. This is to be an ongoing process provided by the Contractor to ensure that LCRA is informed of any mechanical and/or electrical problems which may result in personnel danger or equipment malfunction/failure. This service shall continue beyond the standard warranty period and any fee for this service shall be included in the purchase price of the equipment. This correspondence shall be sent to the LCRA Maintenance Department, and shall reference the original purchase order number, equipment model, serial number(s), and date of manufacture. Service advisory information shall be sent to [email protected] on top of any other communications made to the LCRA. 9.05 MSDS Sheets The Contractor shall furnish Material Safety Data Sheets (MSDS OSHA Form 20) on all chemicals and hazardous materials specifying generic and trade name of the product, product specification, full hazard information, 11 instructions and special equipment required for handling, information on approved containers, and instructions for disposal. An MSDS sheet shall be furnished with each shipment of chemicals or hazardous materials. 9.06 Training The Contractor shall provide up to two (2) days of offsite training in Austin, Texas by a qualified instructor to educate LCRA technicians on the installation, testing, and maintenance of the Shunt Power Capacitor Bank. This training shall be conducted in Austin when all materials have been received. This training shall not be priced as part of the price of the Shunt Power Capacitor Banks that are bid. A separate description of the training and pricing shall be provided as part of the Contractor’s proposal. 10.00 TESTING - INSPECTIONS: 10.01 Testing 10.01.01 The manufacturer shall conduct design and production testing as follows. The manufacturer shall comply with the specific testing requirements specified under IEEE 18-2012, Section 7 therein. Production Test A) B) C) D) E) Short time overvoltage Capacitance Leak Discharge resistor Loss determination Design Tests A) B) C) D) E) F) G) 10.01.02 Dielectric withstand Impulse withstand Bushing Thermal stability Radio influence voltage Voltage decay Short circuit discharge The manufacturer shall furnish a certified test report for the tests described above. The report shall list each test conducted and test results. 12 10.01.03 The conditions that the tests shall be performed under shall comply with IEEE 18-2012, Section 7.1.3 therein. 10.01.04 LCRA reserves the right to be present to observe the tests described herein. 10.01.05 LCRA reserves the right to test or have test conducted on any item furnished under this specification. 10.01.06 Any item which fails to pass the prescribed tests described herein shall be rejected from any shipment. 10.02 Inspection 10.02.01 The manufacturer shall conduct production and final inspections to assure that all items are in compliance with this specification. Any nonconforming items shall be rejected. 10.02.02 The vendor shall assure that all items which have been in the vendor's possession have been inspected and are in compliance with this specification. 13 14