E09.REV

MEDIUM VOLTAGE SWITCHGEAR

NOTE: FINAL COPY: JUNE, 1988.

NOTE: THIS SPECIFICATION IS FOR FUSED SWITCH DEVICES ONLY.

Part 1 -	GENERAL

1)	WORK INCLUDED

A.	Work in this Section includes the providing of labor, materials, equipment and services necessary for a complete and safe installation in accordance with the contract documents and all applicable codes and authorities having jurisdiction.

NOTE: ELABORATE ON UTILITY REQUIREMENTS AS NECESSARY. INCLUDE UTILITY DOCUMENTS IF AVAILBLE

B.	All service equipment shall conform to utility requirements. Contractor to obtain approval for submitted equipment.

C.	The related equipment includes the following:

1.	Metal-enclosed switchgear:

a.	Type:

(1)	Indoor.

(2)	Outdoor.

(3)	Single incoming line.

(4)	Dual selective incoming line.

(5)	Loop feed through line.

(6)	Loop feed selective line.

(7)	Single conductor cables.

(8)	3 conductor cables.

(9)	Pothead and stress cone cable termination.

(10)	Stress cone cable termination.

b.	For operation on:

(1)	----- kv, 3 phase, 3 wire delta system.

(2)	----- kv, 3 phase, 4 wire wye system.

(3)	Ungrounded system.

(4)	Grounded system.

2)	RELATED WORK AND REQUIREMENTS

A.	Requirements of GENERAL CONDITIONS, DIVISION No. 1 and Section GENERAL PROVISIONS FOR ELECTRICAL WORK apply to all work in this Section.

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE ONLY SECTIONS DIRECTLY AFFECTING WORK OF THIS SECION

B.	Related work in the following Sections:

1.	CABLE TRAY (CENTER SPINE TYPE).

2.	CABLE TRAY (SIDE RAIL TYPE).

3.	WIRE AND CABLE.

4.	BUSWAYS.

5.	LOW VOLTAGE DISTRIBUTION EQUIPMENT.

6.	UNIT SUBSTATION.

7.	MOTOR CONTROL CENTERS.

8.	MOTOR CONTROLLERS.

9.	ELECTRIC SERVICE SYSTEM.

10.	POWER, CONTROL AND ALARM WIRING SYSTEMS.

11.	GROUNDING SYSTEM.

12.	DEVICES.

13.	LIGHTING FIXTURES.

14.	PIPE TRACING SYSTEM.

15.	-----.

3)	REFERENCE STANDARDS

A.	Published Specifications' standards, tests or recommended methods of trade, industry or governmental organizations apply to work in this Section.

B.	Comply with all applicable national, state and local codes and refer to Section GENERAL PROVISIONS FOR ELECTRICAL WORK for additional Reference Standards.

4)	QUALITY ASSURANCE

A.	The installation shall be in accordance with ANSI, IEEE and NEMA Standards.

B.	Refer to Section GENERAL PROVISIONS FOR ELECTRICAL WORK for Guarantee and other Quality Assurance requirements.

5)	SUBMITTALS

A.	Submit shop drawings for medium voltage switchgear including plan and elevation drawings, bill of material, wiring diagram, detail layout of equipment in switchgear module, electrical characteristics of components, fusing and cable termination details.

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

A.	S&C Electric Company, General Electric and Westinghouse.

NOTE: REVIEW WITH ENGINEERING DIRECTOR BEFORE INCLUDING IN SPECIFICATION

B.	POWERCON.

C.	Brown Bovari.

2)	SWITCHGEAR ASSEMBLY

A.	Enclosure shall be freestanding, self-supporting integral cubicles and the same manufacturer as switching equipment constructed of No. 11 gauge cold-rolled sheet steel.

1.	Enclosure shall be completely welded construction.

2.	Enclosure shall be angle iron construction.

3.	Provide access.

4.	Enclosure shall have completely front accessible.

5.	Enclosure shall have front and rear accessible.

a.	Provide hinge rear doors.

6.	Make provisions for future expansion.

7.	Cable entry shall be:

a.	1 bottom entry.

b.	1 top entry.

c.	1 side entry.

d.	1 rear entry.

8.	Doors: Provide full length bulkhead or reinforced type construction with minimum 3 latches.

a.	Inspection windows shall permit open and closed position inspection.

b.	Doors shall be interlocked to prevent access to energized switch or fuses.

c.	Doors shall have externally mounted and non-removable operating handles with provisions for padlocking in either open or closed position.

d.	Provide high voltage warnings: "Danger High Voltage" signs on each door.

9.	For outdoor, provide weatherproof construction and gasketed joints between cubicles or roof caps.

a.	Electric space heaters in each bay shall be wired to terminal block. Provide power wiring and thermostat as required.

b.	Louver shall be provided at top and bottom of front and rear of each bay. Louver shall be rainproof and corrosion-resistant. Louver shall have inside baffles to protect against insertion of foreign objects.

c.	Provide rodent and insect screens.

NOTE: IN DUSTY LOCATIONS.

d.	Provide glass-fiber filters.

e.	Provide dripproof and vandalproof construction.

10.	Indoors: Louver shall be at top and bottom of front and rear of each bay. Provide insect and rodent screens.

11.	Finish: Apply zinc coating on both interior and exterior surfaces. Apply intermediate epoxy ester primer. Apply final coat of epoxy-resin which shall be modified alkyd. All paint shall be baked on.

12.	Provide lifting eyes for each section.

13.	Allow adequate space for terminations and cable training.

B.	Bus.

NOTE: 600, 1200 OR 2000 AMPS.

1.	Rating shall be ----- amp continuous.

a.	Bus shall be copper.

b.	Bus shall be aluminum:

(1)	With Bellville washers.

c.	Provide ----- amp symmetrical short circuit rating.

d.	Run bus at top of switchgear.

e.	Run bus at bottom of switchgear.

NOTE: NOT RECOMMENDED.

2.	Ground bus shall run inside equipment with bracket to each cubicle with a capacity 20 percent of bus size.

3.	Allow for future extension of bus.

4.	Provide clearance and spacing as required by code.

5.	Provide silver plate bus connection.

6.	Provide tin plate bus connection.

C.	Metering cubicle shall include fused potential transformer, current transformers, lightning arrestors, phase or ground indicator lights, Utility Co. metering equipment, ammeter, including selector switch, and voltmeter, including selector switch.

D.	Provide air load interrupter switches with ratings, as follows:

NOTE: 4.76 FOR 4.16 KV, 17 KV FOR 15 KV, 27 KV FOR 25, 38 FOR 34.5 KV

1.	----- kv, nominal ----- kv maximum.

NOTE: 19 FOR 5 KV, 36 KV FOR 15 KV, 80 KV FOR 34.5 KV.

2.	----- kv insulation test.

NOTE: 60 KV FOR 5 KV, 95 KV, 95 KV FOR 15, 125 OR 150 FOR 25, 150 OR 200 KV FOR 34.5 KV

3.	----- kv basic impulse level (BIL).

4.	----- amp continuous.

5.	----- amp, momentary current capacity.

6.	3 pole.

7.	Fused.

8.	Unfused.

9.	Switches shall be manually operated.

10.	Switches shall be power operated.

a.	Provide wiring for operator.

11.	Switches shall be free of arcing or ionized gas production.

12.	Switch blades shall not open until clear of main contacts by a distance greater than the external flashover distance. Interlocking blades shall prevent incomplete switch closing.

13.	Provide key interlock as indicated.

14.	Provide ground position for key operated switch as shown on drawings.

E.	Provide fuses with rating as follows:

1.	----- kv.

2.	----- amp continuous.

3.	----- mva, 3 phase symmetrical short circuit interrupting capacity at ----- kv.

4.	Provide 3 spare fuses for each type used.

5.	All fuses shall be of same manufacturer.

6.	Provide fuse handling tool.

F.	Labeling.

1.	Provide with the following information.

a.	Kv nominal.

b.	Kv maximum design.

c.	Kv BIL.

d.	Main bus continuous rating amps.

e.	Short-circuit ratings.

f.	MVA three-phase symmetrical at rated voltage.

g.	Interrupting, momentary, and fault closing ratings.

2.	Each bay shall bear a nameplate indicating continuous and interrupting rating of switches.

3.	Single-line diagram mounted in frame shall be provided and installed in convenient location.

4.	Label all phases in each cubicle.

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Mount on floor channels set in concrete.

B.	Refinish damaged or scratched surfaces and rub down board with approved polish.

C.	Provide 24 inch wide insulating mat in front of boards and in rear of free standing ones.

D.	Provide protective covering during construction.

E.	Tighten all bolted connections prior to energizing.

F.	Provide fuse cabinet with 3 spare fuses of each type.

G.	Provide special tools as required for routine maintenance and inspection.

H.	Make-up cable terminations to cable manufacturer's and utility company requirements.

2)	TESTS

A.	Factory tests shall be in accordance with NEMA, ANSI and IEEE standards and include those tests required by the Electric Utility Company.

B.	Test results substantiating all ratings shall be provided prior to shipment from factory.

C.	Visual and mechanical inspection.

1.	Inspect for physical, electrical and mechanical condition.

2.	Compare equipment nameplate information with latest single line diagram and report discrepancies.

3.	Perform mechanical operator tests in accordance with manufacturer's instructions. Clean and lubricate operator.

4.	Check blade alignment and arc interrupter operation.

5.	Check fuse linkage and element for proper holder and current rating.

6.	Check each fuse holder for adequate mechanical support of each fuse.

7.	Check key interlocks.

D.	Insulation resistance test: Perform insulation resistance test on each phase to ground and from phase to phase.

E.	Overpotential test: Perform overpotential test on each phase to ground and from phase to phase.

F.	Contact resistance test: Perform contact resistance test across each switch blade and fuse holder.

NOTE: OBTAIN ALL UTILITY REQUIRED TEST INFORMATION & INCLUDE AS AN APPENDIX TO THIS SPECIFICATION

G.	Perform all field tests required by the electric utility for service equipment. Contractor shall verify utility requirements and perform all tests.