261316 Medium Voltage Fusible Interrupter Switches.pdf

11-01-22

26 13 16 - 1

SECTION 26 13 16

MEDIUM-VOLTAGE FUSIBLE INTERRUPTER SWITCHES

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies the furnishing, installation, connection, and testing of medium-voltage fusible interrupter switches, indicated as switches in this section.

1.2 RELATED WORK

A. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS:

Requirements that apply to all sections of Division 26.

B. Section 26 05 73, OVERCURRENT PROTECTIVE DEVICE COORDINATION STUDY:

Short circuit and coordination study, and requirements for a coordinated electrical system.

1.3 QUALITY ASSURANCE

A. Quality Assurance shall be in accordance with Paragraph, QUALIFICATIONS

(PRODUCTS AND SERVICES) in Section 26 05 11, REQUIREMENTS FOR

ELECTRICAL INSTALLATIONS.

1.4 FACTORY TESTS

A. Factory Tests shall be required.

B. Factory Tests shall be in accordance with Paragraph, MANUFACTURED

PRODUCTS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL

INSTALLATIONS, and the following requirements:

1. Switches shall be tested to assure that there are no electrical or mechanical defects. Tests shall be conducted as per UL and ANSI

Standards. Factory tests shall be certified. The following tests shall be performed:

a. Verify that fuse sizes and types are in accordance with drawings and

Overcurrent Protective Device Coordination Study.

b. Verify tightness of bolted electrical connections by calibrated torque-wrench method in accordance with manufacturer’s published data.

c. Verify correct phase barrier installation.

d. Verify correct operation of all indicating and control devices.

e. Verify appropriate lubrication on moving current-carrying parts and on moving and sliding surfaces.

f. Exercise all active components.

26 13 16 - 2

g. Perform an insulation-resistance test, phase to ground, on each bus section, with phases not under test grounded, in accordance with manufacturer’s published data.

1.5 SUBMITTALS

A. Submit in accordance with Paragraph, SUBMITTALS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS, and the following requirements:

1. Shop Drawings:

a. Shop drawings shall be submitted simultaneously with or after the

Overcurrent Protective Device Coordination Study.

b. Submit sufficient information to demonstrate compliance with drawings and specifications.

c. Provide information such as complete electrical ratings, dimensions and approximate design weights, enclosure types, mounting details, materials, required clearances, cable termination sizes, fuse sizes and class, interrupting ratings, basic impulse level, single line diagram, wiring diagrams, front, side and rear elevations, sectional views, safety features, accessories, and nameplate data.

2. Manuals:

a. Submit, simultaneously with the shop drawings, companion copies of complete maintenance and operating manuals including technical data sheets, wiring diagrams, and information for ordering replacement parts.

b. If changes have been made to the maintenance and operating manuals originally submitted, submit updated maintenance and operating manuals to the Resident Engineer .

3. Certification: Submit the following.

a. Certification by the manufacturer that switches conform to the requirements of the drawings and specifications.

b. Certified production test reports.

1.6 APPLICABLE PUBLICATIONS

A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by designation only.

B. American National Standards Institute (ANSI):

26 13 16 - 3

C37.57-10...............Metal-Enclosed Interrupter Switchgear

Assemblies - Conformance Testing

C37.58-20...............Indoor AC Medium-Voltage Switches for Use in

Metal-Enclosed Switchgear - Conformance Test

Procedures

C. International Code Council (ICC):

IBC-21..................International Building Code

D. Institute of Electrical and Electronics Engineers (IEEE):

C37.20.3-13.............Metal-Enclosed Interrupter Switchgear (1kV –

38kV)

C37.22-03...............Preferred Ratings and Related Required

Capabilities for Indoor AC Medium Voltage

Switches Used in Metal-Enclosed Switchgear

C37.42-16...............Specifications for High Voltage (>1000 V)Fuses and Accessories

C37.48-20...............Guide for Application, Operation and

Maintenance of High Voltage Fuses, Distribution

Enclosed Single Pole Air Switches, Fuse

Disconnecting Switches, and Accessories

E. National Fire Protection Association (NFPA):

70-23...................National Electrical Code (NEC)

PART 2 - PRODUCTS

2.1 MEDIUM-VOLTAGE FUSIBLE INTERRUPTER SWITCHES

A. Shall be in accordance with ANSI, IEEE, NFPA, as shown on the drawings, and have the following features:

1. Deadfront air break, three-pole gang-operated, interrupter type.

2. Copper blades.

3. Interphase barriers for the full length of each pole.

4. Protective shield to cover the cable connections on the line terminals.

5. Quick-make, quick-break, manual stored-energy type operation mechanism. The mechanism shall enable the switch to close against a fault equal to the momentary rating of the switch without affecting its continuous current carrying or load interrupting ability.

6. External manual operating handle with lock-open padlocking provisions.

7. When the switches are open, the fuses shall be de-energized.

26 13 16 - 4

8. Current limiting fuses type CLE.

9. The switch shall be removable from the structure as a complete operational component.

10. Enclosures:

a. Outdoor NEMA type 3R.

b. Doors:

1) Concealed or semi-concealed hinges shall be used to attach doors. Weld hinges to the enclosure and door.

2) A separate door for the fuse section. A mechanical interlock shall prevent opening the door unless the switch blades are open, and prevent closing the switch if the door is open.

3) Three point door locking mechanism with suitable handles and padlocking provisions.

4) Safety-glass window for full viewing of the switch blades. The window shall be not more than 58 inches above the switch pad level to allow ease of inspection.

5) Door stops for the open position.

c. Finish:

1) All metal surfaces shall be thoroughly cleaned, phosphatized, primed and painted at the factory.

2) Final finish shall be enamel, lacquer or powder coating.

Enamel and powder coatings shall be oven baked. Color shall be light gray.

d. A hinged grounded metal barrier that is bolted closed in front of the switch to prevent inadvertent contact with any live part, yet allows for full-view inspection on the switch blade position.

e. Green OPEN, red CLOSED switch position indicators with the words

“Open” and “Closed” in French, Spanish and English.

B. The minimum momentary current rating shall be 61kA.

C. The minimum short-time 2-second current rating shall be 38 kA.

D. Provide full length ground bar.

E. Accessories: Furnish distribution class surge arresters with ratings in accordance with manufacturer’s recommendations.

F. Equipment shall be manufactured by Eaton or approved equal by Schneider

Electric or ABB.

2.2 METERING

A. Not Used

26 13 16 - 5

2.3 NAMEPLATES AND MIMIC BUS

A. Nameplates: Provide laminated black phenolic resin with white core with

12 mm (1/2 inch) engraved lettered nameplates next to each switch.

Nameplates shall indicate equipment served, spaces, or spares in accordance with one line diagram shown on drawings. Nameplates shall be mounted with plated screws on front of switches.

B. Mimic Bus: Provide an approved mimic bus on front of each switch assembly. Color shall be black, either factory-painted plastic or metal strips. Plastic tape shall not be used. Use symbols similar to one line diagram shown on drawings. Plastic or metal strips shall be mounted with plated screws.

PART 3 - EXECUTION

3.1 FACTORY TESTING

A. Standard factory tests shall be performed on the equipment under this section. All tests shall be in accordance with the latest version of

ANSI and NEMA standards.

B. The manufacturer shall provide three(3) certified copies of the test reports.

3.2 SPARE PARTS

A. Provide one (1) set of spare fuses for each switch installed on this project.

3.3 ONE LINE DIAGRAM AND SEQUENCE OF OPERATION

A. Furnish a written sequence of operation for the switchgear and connected line side/load side electrical distribution equipment.

B. Deliver an additional four copies of the as-built one line diagram and sequence of operation to the Resident Engineer.

3.4 INSTRUCTION

A. Furnish the services of a factory-trained technician for one 4 hour period for instructing personnel in the operation and maintenance of the switches and related equipment, on the date requested by the

Resident Engineer.

---END---