Spec_-_26_13_01_Atch_2_to_Addendum__2.pdf

Section 26 13 01 Page 1

SECTION 26 13 01

PAD-MOUNTED DEAD-FRONT AIR INSULATED SWITCHGEAR

08/13

PART 1 GENERAL

Section 26 08 00 APPARATUS INSPECTION AND TESTING applies to this section, with the additions and modifications specified herein.

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM A167 (2011) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel

Plate, Sheet, and Strip

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 386 (2006; INT 1 2011) Standard for Separable

Insulated Connector Systems for Power

Distribution Systems Above 600V

IEEE C2 (2012; Errata 2012; INT 1-4 2012; INT 5-7

2013; INT 8 2014) National Electrical Safety

Code

IEEE C37.74 (2003; Int 1 2004) Standard Requirements for

Subsurface, Vault, and Pad-Mounted Load-

Interrupter Switchgear and Fused Load-

Interrupter Switchgear for Alternating

Current Systems Up to 38 kV

IEEE C57.12.28 (2014) Standard for Pad-Mounted Equipment -

Enclosure Integrity

IEEE C62.11 (2012) Standard for Metal-Oxide Surge

Arresters for Alternating Current Power

Circuits (>1kV)

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2013) Standard for Acceptance Testing

Specifications for Electrical Power Equipment and Systems

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2014; AMD 1 2013; Errata 1 2013; AMD 2 2013;

Errata 2 2013; AMD 3 2014; Errata 3-4 2014;

AMD 4-6 2014) National Electrical Code

Solc FA4418-15-R-0011 Atch #2 to Addendum #2

../Word/26%2008%2000.doc

Section 26 13 01 Page 2

NFPA 70B (2013) Recommended Practice for Electrical

Equipment Maintenance

UNDERWRITERS LABORATORIES (UL)

UL 467 (2007) Grounding and Bonding Equipment

1.2 DEFINITIONS

1.2.1 Switched Way

A switched way is considered a three-phase circuit entrance to the bus through a switch.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. S Submit the following in accordance with Section 01 33 00.

SD-02 Shop Drawings

Switchgear Drawings; G

Sectionalizing Cabinet; G

SD-03 Product Data

Fuse Time-Current Characteristic Curves; G

Air Insulated Pad-mounted Switchgear; G

Sectionalizing Cabinet; G

Insulated High-Voltage Connectors; G

Surge Arresters; G

Include data and manufacturer's information on switches and each component, device, and accessory provided with the equipment.

SD-06 Test Reports

Acceptance Checks and Tests; G

Submit reports, including acceptance criteria and limits for each test in accordance with NETA ATS "Test Values".

SD-07 Certificates

Paint Coating System; G

SD-09 Manufacturer's Field Reports

Switchgear design and production tests; G

../Word/01%2033%2000.doc

Section 26 13 01 Page 3

SD-10 Operation and Maintenance Data

Air Insulated Pad-Mounted Switchgear and Sectionalizing Cabinet

Operation and Maintenance, Data Package 5; G

1.4 QUALITY ASSURANCE

1.4.1 Switchgear Drawings

Furnish drawings that include, but are not limited to, the following:

a. Overall dimensions, weights, plan view, and front view

b. Ratings

c. Single-line diagram.

1.4.2 Paint Coating System

Submit IEEE C57.12.28 paint coating system performance requirement tests.

1.5 MAINTENANCE

1.5.1 Air Insulated Pad-mounted Switchgear Operation and Maintenance Data

In addition to requirements of Data Package 5, include the following:

a. An instruction manual with pertinent items and information highlighted

b. An outline drawing, front, top, and side views

c. Prices for spare parts and supply list

d. Routine and field acceptance test reports

e. Fuse curves for fuses

f. Actual nameplate diagram

g. Date of purchase

PART 2 PRODUCTS

2.1 SECTIONALIZING CABINET

Paint Sectionalizing Cabinet enclosure a brown factory coating, provide color sample with submittals. Paint coating system shall comply with IEEE

C57.12.28 regardless of equipment material.

The Sectionalizing Cabinet shall be low-profile cabinet design conforming to the requirements of IEEE C37.20.3 and IEEE 386 , Category A.

The Sectionalizing Cabinet shall be deadfront construction with cable parking stands, and grounding lugs. Provide removable lifting tabs. Provide insulated protective caps (not shipping caps) for insulating and sealing out moisture from unused bushing well inserts and insulated standoff bushings.

Section 26 13 01 Page 4

Pad mount the Sectionalizing Cabinet.

2.2 AIR INSULATED PAD-MOUNTED SWITCHGEAR

IEEE C37.74

2.2.1 Ratings and Test Requirements

Provide switchgear with a nominal voltage rating of 14.4 kV and the following corresponding ratings:

Rated Maximum Voltage, kV 17

Rated Withstand Impulse Voltage, kV

BIL

Continuous and Load Interrupting

Current, A

Short-Circuit Current, kA rms Sym 22.4

Power Fuses, Amperes, Maximum

Interrupting, kA rms Sym

Provide switched ways rated for the required continuous and load interrupting current.

2.2.2 Switchgear Construction

Provide switchgear with the following construction and configuration:

a. Switch contacts and cable entrance terminations contained in an enclosed, steel compartment.

b. Configured with load interrupting and fused switched ways as indicated.

c. Accessible terminations suitable for cables entering from below.

d. Switch contact positions for switched ways visible through viewing windows in the switchgear termination compartment.

e. Each switched way with two position switch; Open, Closed and provisions for grounding.

2.2.2.1 Pad-mounting Provisions

Provide enclosed switchgear suitable for installation on a concrete pad, including the following:

a. Fabricate switchgear enclosure base of ASTM A167 type 304 or 304L stainless steel.

b. Enclosure base includes any part of the switchgear enclosure that is within 3 inches of concrete pad.

Section 26 13 01 Page 5

c. Paint Paint entire enclosed switchgear a brown factory coating, provide color sample with submittals.

d. Comply with IEEE C57.12.28 for the paint coating system regardless of equipment material.

2.2.3 Fused Ways

Provide the following:

a. Fuse mountings enclosed in an inner steel compartment.

b. Each fuse mounting installed as an integral part of a fuse handling mechanism that does not allow access to the fuse until the elbow for that fuse has been disconnected and a mechanical interlock to the fuse-access panel has been actuated.

c. The opening into the component compartment covered by the fuse-access panel in both the open and closed positions to prevent access to high voltage.

d. Blown-fuse indicators for fused ways visible through viewing windows in the termination compartment.

2.2.3.1 Fuses

Provide fuses in accordance with the following:

a. Fuse ratings as indicated.

b. Helically coiled fuses if rated 10 amperes or larger.

c. Solid-material power fuses capable of detecting and interrupting all faults under all realistic conditions of circuitry, with line-to-line or line-to-ground voltage across the fuse, and capable of handling the full range of transient recovery voltage severity associated with these faults.

d. All arcing accompanying operation of the fuse contained within the fuse, and all arc products and gases evolved effectively contained within the exhaust control device during fuse operation.

e. Fusible elements nonaging and nondamagable with melting time-current characteristics that are permanently accurate to within a maximum tolerance of 10% in terms of current.

f. Equipped with a blown-fuse indicator that provides visible evidence of fuse operation while installed in the fuse mounting.

g. Equipped with a blown-fuse indicator that provides visible evidence of fuse operation while installed in the fuse mounting..

2.2.4 Key Interlock

Provide key interlock system as indicated on the drawings.

Section 26 13 01 Page 6

2.2.5 Dead-Front High-Voltage Bushings

IEEE 386. 15 kV, 95 kV BIL. Provide 200 ampere bushing wells and bushing well inserts for each fused way.

a. Parking stands: Provide a parking stand near each dead-front bushing.

Provide insulated standoff bushings for parking of energized load-break connectors on each parking stand.

2.3 INSULATED HIGH-VOLTAGE CONNECTORS

IEEE 386. Provide corresponding connector for each switched way; provide connectors with a grounding eye and test point.

b. 200 Ampere loadbreak connector ratings: Voltage: 15 kV, 95 kV BIL.

Short time rating: 10,000 rms symmetrical amperes.

2.4 SURGE ARRESTERS

IEEE C62.11, rated 12 kV, fully shielded, dead-front, metal-oxide-varistor, elbow type with resistance-graded gap, suitable for plugging into inserts.

Provide arresters on switched ways as indicated.

2.5 GROUNDING PROVISIONS

Provide a ground-connection pad in each termination compartment. Provide a continuous copper ground bus across the full width of each termination compartment for fuses.

2.6 SOURCE QUALITY CONTROL

2.6.1 Switchgear Design and Production Tests

Furnish reports which include results of design and production tests performed according to IEEE C37.74. Perform production tests by the manufacturer on each switchgear assembly to ensure that design performance is maintained in production.

PART 3 EXECUTION

3.1 INSTALLATION

Conform to IEEE C2, NFPA 70, and to the requirements specified herein.

3.2 GROUNDING

NFPA 70 and IEEE C2, except provide grounding systems with a resistance to solid earth ground not exceeding 10 ohms. When work, in addition to that indicated or specified, is directed to obtain the specified ground resistance, the provision of the contract covering "Changes" applies.

3.2.1 Grounding Electrodes

Provide driven ground rods as specified in Section 33 71 02 UNDERGROUND

ELECTRICAL DISTRIBUTION.

../Word/33%2071%2002.doc

Section 26 13 01 Page 7

3.2.2 Connections

Make joints in grounding conductors and ground loop by exothermic weld or compression connector. Install exothermic welds and compression connectors as specified in Section Section 33 71 02 UNDERGROUND ELECTRICAL

DISTRIBUTION.

3.2.3 Grounding and Bonding Equipment

UL 467, except as indicated or specified otherwise.

3.3 FOUNDATION FOR EQUIPMENT AND ASSEMBLIES

Mount switch on concrete slab. Place the slab on a 6-inch thick, well-compacted gravel base. Top of concrete slab is approximately 4-inches above finished grade with gradual slope for drainage. Edges above grade are 1/2-inch chamfer. Ensure slab is of adequate size to project at least 8-inches beyond the equipment.

Stub up conduits, with bushings, 2-inches into cable wells in the concrete pad. Coordinate dimensions of cable wells with transformer cable training areas.

3.4 FIELD QUALITY CONTROL

3.4.1 Performance of Acceptance Checks and Tests

Perform in accordance with the manufacturer's recommendations, NFPA 70B, NETA ATS and referenced ANSI standards.

Include the following visual and mechanical inspections and electrical tests, performed in accordance with NETA ATS.

3.4.1.1 Switchgear

a. Visual and Mechanical Inspection

(1) Compare equipment nameplate information with specifications and approved shop drawings.

(2) Inspect physical and mechanical condition.

(3) Check for proper anchorage, alignment, required area clearances, and grounding.

(4) Perform mechanical operator tests in accordance with manufacturer's instructions.

(5) Inspect all indicating devices for proper operation.

(6) Test interlock systems for proper operation and sequencing.

b. Electrical Tests

(1) Perform contact-resistance tests.

(2) Perform insulation-resistance tests.

../Word/33%2071%2002.doc

Section 26 13 01 Page 8

(3) Perform an over-potential test on each switched way pole with the switched way in the open position in accordance with the manufacturer's instructions.

3.4.1.2 Grounding System

a. Visual and Mechanical Inspection

Inspect ground system for compliance with contract plans and specifications.

b. Electrical Tests

Perform ground impedance measurements utilizing the fall-of-potential method. On systems consisting of interconnected ground rods, perform tests after interconnections are complete. On systems consisting of a single ground rod perform tests before any wire is connected. Take measurements in normally dry weather, not less than 48 hours after rainfall. Use a portable ground testing megger in accordance with manufacturer's instructions to test each ground or group of grounds. Use an instrument equipped with a meter reading directly in ohms or fractions thereof to indicate the ground value of the ground rod or grounding systems under test.

Submit the measured ground resistance of each ground rod and grounding system, indicating the location of the rod and grounding system. Include the test method and test setup (i.e., pin location) used to determine ground resistance and soil conditions at the time the measurements were made.

3.4.2 Follow-Up Verification

Upon completion of acceptance checks and tests, show by demonstration in service that devices are in good operating condition and properly performing the intended function. Perform each item not less than three times to demonstrate its function. As an exception to requirements stated elsewhere in the contract, notify the Contracting Officer 5 working days in advance of the dates and times for checks and tests.

3.5 FIELD APPLIED PAINTING

Where field painting of enclosures is required to correct damage to the manufacturer's factory applied coatings, provide manufacturer's recommended coatings and apply in accordance with manufacturer's instructions.

-- End of Section --