SECTION 16361

AIR INTERRUPTER SWITCHES

PART 1 GENERAL

SECTION INCLUDES

Medium voltage interrupter switches.

RELATED SECTION

Section [_____ - __________]: Concrete pad for equipment support.

REFERENCES

ANSI/IEEE 24 - Performance Characteristics and Dimensions for Outdoor Apparatus Bushings.

ANSI/IEEE 37.20 - Switchgear Assemblies, Including Metal-Enclosed Bus.

IEEE 48 - Test Procedures and Requirements for High-Voltage AC Cable Terminations.

ANSI Z55.1 - Gray Finishes for Industrial Apparatus and Equipment.

SUBMITTALS

Submit shop drawings under the provisions of Section [01300.] [01340.]

Submit shop drawings indicating outline dimensions, enclosure construction, shipping splits, lifting and supporting points, electrical single line diagram, and equipment electrical ratings.

Submit product data under the provisions of Section [01300.] [01340.]

Submit product data for components and accessories.

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

OPERATION AND MAINTENANCE DATA

Submit operation and maintenance data under provisions of Section [01700.] [01730.]

Include fuse replacement, adjustment, and lubrication instructions.

QUALITY ASSURANCE

Manufacturer: Company specializing in medium voltage interrupter switches with [three] [_____] years [documented] experience.

DELIVERY, STORAGE, AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Store and protect products under provisions of Section [01600.] [01620.]

Accept interrupter switches on site and inspect for damage.

Protect interrupter switches from weather and moisture by covering with heavy plastic or canvas and by maintaining heat within enclosure in accordance with manufacturer's instructions.

EXTRA MATERIALS

Submit maintenance materials under provisions of Section [01700.] [01750.]

Submit two insulated-handle tools designed for pulling fuses.

Provide [two] [_____] sets of spare fuses of each size and rating under provisions of Section [01700.] [01750.]

PART 2 PRODUCTS

MANUFACTURERS

[______________________________] Model [__________.]

[______________________________] Model [__________.]

[______________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

AIR INTERRUPTER SWITCHES

Switches: ANSI/IEEE 37.20; switchgear assembly including individual air interrupter switches in free-standing cubicles[, securely bolted together to form an integrated structure.]

System Voltage: [_____] kV, three phase, 60 Hz.

Maximum Design Voltage: [5] [15] [25.8] [38] kV.

Basic Impulse Level: [95] [_____] kV.

Main Bus Ampacity: [_____] amperes, continuous.

Short Circuit Rating: [_____] rms symmetrical amperes; [_____] rms symmetrical MVA at rated nominal voltage.

COMPONENTS

Interrupter Switch: [Fused] [Nonfused] two position load interrupter switch.

Voltage and Short Circuit Ratings: Match ratings specified for integrated assembly.

Momentary Rating: [_____] amperes.

Fault Closing: [_____] amperes, two time duty cycle.

ACCESSORIES

Surge Arrestors: [Station] [Intermediate] [Distribution] class, rated [_____] kV; mount in incoming line compartment.

Incoming Cable Terminations: [Clamp-type.] [Potheads.] [Roof bushing.]

Roof Bushings: [ANSI/IEEE 24.] [__________________________.]

Potheads: [IEEE 48.] [_________________________.]

Space Heaters: For [120] [_____] external source, sized by switchgear manufacturer.

Electric Switch Operator: [48] [120] [125] [240] volts [AC] [DC]; operable manually with removable handle or through motor and gear train. Interlock fuse compartment door to prevent opening with switch in CLOSED position.

Provide permanently mounted operating handle, lockable in both positions. Interlock fuse compartment door to prevent opening with switch in CLOSED position.

Key Interlocks: [___________________________________.]

FABRICATION

Construction: [Indoor.] [Weatherproof.] [Walk-in.]

Height: [_____] inches, maximum including auxiliary support members on top and bottom.

Provide sloped drip-proof roof.

Provide separate access to fuses through main cabinet door.

Include continuous ground bus through switchgear assembly, securely connected to frame of each cubicle.

Make top and rear covers removable.

Main Bus: [Aluminum.] [Copper.]

Provide lugs for incoming feeder in [_____] cubicle.

FACTORY FINISHING

Clean surfaces before applying paint.

Apply corrosion-resisting primer to all surfaces.

Apply finish coat of [baked enamel] [____________________] paint to [2] [4] [___] mils ([0.5] [one] [___] mm) thick.

Finish Color: [ANSI Z55.1; Type [24 - Dark Gray.] [61 -Light Gray.] [_______________].] [_______________.]

MANUFACTURERS - MEDIUM VOLTAGE FUSES

[______________________________] Type [__________.]

[______________________________] Type [__________.]

[______________________________] Type [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

MEDIUM VOLTAGE FUSES

Fuse: [Enclosed current limiting, non-expulsion type] [Expulsion type] suitable for use [indoors.] [outdoors in enclosure.]

Fuse Rating: [E] [R] rated fuse, size as indicated.

Voltage: [2.4] [4.16] [15] [_____] kV.

Interrupting Rating: [_____] amperes rms symmetrical.

PART 3 EXECUTION

EXAMINATION

Verify that surfaces are ready to receive work.

Verify field measurements are as [shown on Drawings.] [shown on shop drawings.] [instructed by manufacturer.]

Verify that required utilities are available, in proper location, and ready for use.

Beginning of installation means installer accepts existing surface conditions.

INSTALLATION

Install in accordance with manufacturer's instructions.

FIELD QUALITY CONTROL

Field inspection and testing will be performed under provisions of Section [01400.] [01410.]

Visually inspect for physical damage.

Perform mechanical operator tests in accordance with manufacturer's instructions. Check blade alignment and arc interrupter operations.

Verify key interlock operation.

Perform insulation resistance test on each phase to ground and from each phase to each other phase. Record results.

Perform AC or DC overpotential test to ANSI/IEEE 37.20.

Perform contact resistance test across each switch blade; report any contact resistance in excess of 50 microohms.

END OF SECTION