26_12_00_Update.pdf

Repair (R/M) Electrical Lines – 26 12 00-1 156-011 MSA/COMM SQ Areas – JFSD970342 (114009) Revised July 2013 2012 by FEI

SECTION 26 12 00 1

MEDIUM-VOLTAGE TRANSFORMERS 2

A. GENERAL 4

RELATED DOCUMENTS 6

Drawings and general provisions of the Contract, including General and Supplementary Conditions and 8 Division 01 Specification Sections, apply to this Section. 9

SUMMARY 11

This Section includes Three Phase transformers with 12,470 volt primaries and Single Phase transformers 13 with 7,200 volt primaries: 14

1. Pad-mounted, liquid-filled transformers. 15

DEFINITIONS 17

NETA ATS: Acceptance Testing Specification. 19

ACTION SUBMITTALS 21

Product Data: Include rated nameplate data, capacities, weights, dimensions, minimum clearances, installed 23 devices and features, location of each field connection, and performance for each type and size of 24 transformer indicated. 25

INFORMATIONAL SUBMITTALS 27

Source quality-control test reports. 29 Field quality-control test reports. 31 Follow-up service reports. 33

CLOSEOUT SUBMITTALS 35

Operation and Maintenance Data: For transformer and accessories to include in emergency, operation, and 37 maintenance manuals. 38

QUALITY ASSURANCE 40

Testing Agency Qualifications: An independent testing agency, with the experience and capability to conduct 42 the testing indicated, that is a member company of the InterNational Electrical Testing Association or is a 43 nationally recognized testing laboratory (NRTL) as defined by OSHA in 29 CFR 1910.7, and that is 44 acceptable to authorities having jurisdiction. 45

1. Testing Agency's Field Supervisor: Person currently certified by the InterNational Electrical Testing 46

Association or the National Institute for Certification in Engineering Technologies to supervise on-site 47 testing specified in Part 3. 48

Product Options: Drawings indicate size, profiles, and dimensional requirements of transformers and are 50 based on the specific system indicated. 51 Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by 53 a testing agency acceptable to authorities having jurisdiction, and marked for intended use. 54 Comply with IEEE C2. 56

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(114009) Revised July 2013 2012 by FEI

Comply with ANSI C57.12.10, ANSI C57.12.28, IEEE C57.12.70, and IEEE C57.12.80. 2 Comply with NFPA 70. 4

DELIVERY, STORAGE, AND HANDLING 6

Store transformers protected from weather and so condensation will not form on or in units. Provide 8 temporary heating according to manufacturer's written instructions. 9

PROJECT CONDITIONS 11

Service Conditions: IEEE C37.121, usual service conditions except for the following: 13

1. Exposure to excessively high or low temperatures. 14

2. Unusual transportation or storage conditions. 15

3. Unusual space limitations. 16

COORDINATION 18

Coordinate installation of louvers, doors, spill retention areas, and sumps. Coordinate installation so no 20 piping or conduits are installed in space allocated for medium-voltage transformers except those directly 21 associated with transformers. 22

B. PRODUCTS 24

MANUFACTURERS 26

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may 28 be incorporated into the Work include, but are not limited to, the following: 29

1. Acme Electric Corporation; Power Distribution Products Division. 30

2. Cooper Industries; Cooper Power Systems Division. 31

3. Cutler-Hammer. 32

4. Federal Pacific Transformer Company; Division of Electro-Mechanical Corp. 33

5. GE Electrical Distribution & Control. 34

6. Hammond Manufacturing; Transformer Group. 35

7. Kuhlman Electric Corporation. 36

8. Pauwels Transformers. 37

9. Pioneer Transformers. 38

10. Siemens Energy & Automation, Inc. 39

11. Square D; Schneider Electric. 40

12. Uptegraff, R. E. Mfg. Co. 41

13. Virginia Transformer Corp. 42

PAD-MOUNTED, LIQUID-FILLED TRANSFORMERS 44

Description: ANSI C57.12.13, IEEE C57.12.00, pad-mounted, 2-winding transformers. Stainless-steel tank 46 base and cabinet. 47 Insulating Liquid: Less flammable, dielectric, and UL listed as complying with NFPA 70 requirements for fire 49 point of not less than 300 deg C when tested according to ASTM D 92. Liquid shall be biodegradable and 50 nontoxic. 51 http://www.specagent.com/LookUp/?uid=123456817962&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456817963&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456803100&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456817964&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456803101&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456817965&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456803102&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456803103&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456803104&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456803105&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456817966&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456820270&mf=04&src=wd http://www.specagent.com/LookUp/?uid=123456803106&mf=04&src=wd

Repair (R/M) Electrical Lines – 26 12 00-3 156-011

(114009) Revised July 2013 2012 by FEI

Insulation Temperature Rise: 55 deg C when operated at rated kVA output in a 40 deg C ambient 1 temperature. Transformer shall be rated to operate at rated kilovolt ampere in an average ambient 2 temperature of 30 deg C over 24 hours with a maximum ambient temperature of 40 deg C without loss of 3 service life expectancy. 4

Basic Impulse Level: 95 kV. 6 Full-Capacity Voltage Taps: Four 2.5 percent taps, 2 above and 2 below rated high voltage; with externally 8 operable tap changer for de-energized use and with position indicator and padlock hasp. 9

High-Voltage Switch: 200 A, make-and-latch rating of 10-kA RMS, symmetrical, arranged for loop feed with 11 3-phase, 4-position, gang-operated, load-break switch that is oil immersed in transformer tank with hook-stick 12 operating handle in primary compartment. 13 Primary Fuses: 150-kV fuse assembly with fuses complying with IEEE C37.47. 15

1. Current-limiting type in dry-fuse holder wells, mechanically interlocked with liquid-immersed switch in 16 transformer tank to prevent disconnect under load. 17

2. Internal liquid-immersed cartridge fuses. 18

3. Bay-O-Net liquid-immersed fuses that are externally replaceable without opening transformer tank. 19

4. Bay-O-Net liquid-immersed fuses in series with liquid-immersed current-limiting fuses. Bay-O-Net 20 fuses shall be externally replaceable without opening transformer tank. 21

5. Bay-O-Net liquid-immersed current-limiting fuses that are externally replaceable without opening 22 transformer tank. 23

Surge Arresters: Distribution class, one for each primary phase; complying with IEEE C62.11 and 25 NEMA LA 1; support from tank wall within high-voltage compartment. Transformers shall have three arresters 26 for loop-feed circuits. 27 High-Voltage Terminations and Equipment: Dead front with universal-type bushing wells for dead-front 29 bushing-well inserts, complying with IEEE 386 and including the following: 30

1. Bushing-Well Inserts: One for each high-voltage bushing well. 31

2. Surge Arresters: Dead-front, elbow-type, metal-oxide-varistor units. 32

3. Parking Stands: One for each high-voltage bushing well. 33

4. Portable Insulated Bushings: Arranged for parking insulated, high-voltage, load-break cable 34 terminators; one for each primary feeder conductor terminating at transformer. 35

Accessories: 37

1. Drain Valve: 1 inch, with sampling device. 38

2. Dial-type thermometer. 39

3. Liquid-level gage. 40

4. Pressure-vacuum gage. 41

5. Pressure Relief Device: Self-sealing with an indicator. 42

6. Mounting provisions for low-voltage current transformers. 43

7. Mounting provisions for low-voltage potential transformers. 44

8. Busway terminal connection at low-voltage compartment. 45

9. Alarm contacts for gages and thermometer listed above. 46

IDENTIFICATION DEVICES 48

Nameplates: Engraved, laminated-plastic or metal nameplate for each transformer, mounted with corrosion-50 resistant screws. Nameplates and label products are specified in Section 26 05 53 "Identification for 51 Electrical Systems." 52

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SOURCE QUALITY CONTROL 1

Factory Tests: Perform design and routine tests according to standards specified for components. Conduct 3 transformer tests according to ANSI C57.12.50 and IEEE C57.12.90. 4 Factory Tests: Perform the following factory-certified tests on each transformer: 6

1. Resistance measurements of all windings on rated-voltage connection and on tap extreme 7 connections. 8

2. Ratios on rated-voltage connection and on tap extreme connections. 9

3. Polarity and phase relation on rated-voltage connection. 10

4. No-load loss at rated voltage on rated-voltage connection. 11

5. Excitation current at rated voltage on rated-voltage connection. 12

6. Impedance and load loss at rated current on rated-voltage connection and on tap extreme 13 connections. 14

7. Applied potential. 15

8. Induced potential. 16

9. Temperature Test: If transformer is supplied with auxiliary cooling equipment to provide more than 17 one rating, test at lowest kilovolt-ampere Class OA or Class AA rating and highest kilovolt-ampere 18 Class OA/FA or Class AA/FA rating. 19

a. Temperature test is not required if record of temperature test on an essentially duplicate unit 20 is available. 21

C. EXECUTION 23

EXAMINATION 25

Examine areas and conditions for compliance with requirements for medium-voltage transformers. 27 Examine roughing-in of conduits and grounding systems to verify the following: 29

1. Wiring entries comply with layout requirements. 30

2. Entries are within conduit-entry tolerances specified by manufacturer and no feeders will have to 31 cross section barriers to reach load or line lugs. 32

Examine walls, floors, roofs, and concrete bases for suitable mounting conditions where transformers will be 34 installed. 35 Verify that ground connections are in place and that requirements in Section 26 05 26 "Grounding and 37 Bonding for Electrical Systems" have been met. Maximum ground resistance shall be 5 ohms at location of 38 transformer. 39 Proceed with installation only after unsatisfactory conditions have been corrected. 41

INSTALLATION 43

Install transformers on fiberglass basements per basement manufacturer’s requirements. 45

Maintain minimum clearances and workspace at equipment according to manufacturer's written instructions 47 and NFPA 70. 48

IDENTIFICATION 50

Identify field-installed wiring and components and provide warning signs as specified in Section 26 05 53 52 "Identification for Electrical Systems." 53

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(114009) Revised July 2013 2012 by FEI

CONNECTIONS 1

Ground equipment according to Section 26 05 26 "Grounding and Bonding for Electrical Systems." 3

Connect wiring according to Section 26 05 19 "Low-Voltage Electrical Power Conductors and Cables." 5

FIELD QUALITY CONTROL 7

Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust 9 field-assembled components and equipment installation, including connections, and to assist in field testing. 10 Report results in writing. 11 Testing Agency: Engage a qualified testing and inspecting agency to perform the following field tests and 13 inspections and prepare test reports: 14 Perform the following field tests and inspections and prepare test reports: 16

1. After installing transformers but before primary is energized, verify that grounding system at 17 substation is tested at specified value or less. 18

2. After installing transformers and after electrical circuitry has been energized, test for compliance with 19 requirements. 20

3. Perform visual and mechanical inspection and electrical test stated in NETA ATS. Certify compliance 21 with test parameters. 22

4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment. 23

Remove and replace malfunctioning units and retest as specified above. 25 Test Reports: Prepare written reports to record the following: 27

1. Test procedures used. 28

2. Test results that comply with requirements. 29

3. Test results that do not comply with requirements and corrective actions taken to achieve compliance 30 with requirements. 31

END OF SECTION 33