electrical specifications ,section 16170 safety and motor isolators (disconnects)

8/12/2019 Electrical Specifications ,SECTION 16170 SAFETY AND MOTOR ISOLATORS (DISCONNECTS)

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SECTION 16170

SAFETY AND MOTOR ISOLATORS (DISCONNECTS)

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of Contract, including General and special Conditions andDivision-1 (General requirements), apply to wor of t!is section.

". General #rovisions for $lectrical %or &ection 1'1.

C. esting and commissioning, section 1'*+.

D. !e requirements of t!is section apply to safety and motor disconnects specified elsew!ere int!e specification.

1.2 DESCRIPTION OF WORK

A. %or includes providing all materials, equipment, accessories, services and tests necessary tocomplete and mae ready for operation y t!e wner, all safety and disconnect switc!es (fusedand un-fused) in accordance wit! Drawings and &pecifications.

1.3 QUALITY ASSURANCE

A. anufacturers/ 0irms regularly engaged in manufacture of safety and motor disconnectswitc!es of types and capacities required, w!ose products !ave een in satisfactory use insimilar service for not less t!an years and s!all e of one manufacturer, approved y t!ea!ramaa, and conform to t!e requirements set fort! in t!is specification. #rovide safety andmotor disconnects produced y a manufacturer listed as an Acceptale anufacturer in t!is

section.

". &tandards Compliance/ Comply wit! requirements of applicale local codes, a!ramaaregulations latest edition, D2345D$, 2$C, $3, 3$C, 67 and 3$A &tandards pertaining tosafety and motor disconnects. #rovide disconnect switc!es w!ic! !ave een listed andlaeled.

C. 2n case of conflict among t!e referenced standards and codes, t!e more stringent provision willgovern.

1. SU!MITTALS

A. #roduct Data/ &umit manufacturer8s data including printed tec!nical literature, installation,instructions, and catalog cuts for eac! type of safety and motor disconnect switc!es.

PART 2 - PRODUCTS

2.1 SAFETY AND MOTOR DISCONNECT

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A.&%2C; 23$cept as ot!erwise noted or required, wit! multiple nocouts on all sidesand ac.

=. ;inged door and cover.

. 2ndustry &tandard for e>terior installation.

9. 2ndustry &tandard type most suitale for t!e environmental condition of t!e area.

+. All disconnect switc!es mared weat!er @proof type s!ould e type 3$A@9 (for indoorinstallation) and type 3$A @ 9B for (outdoor installation).

2.2 INSPECTION AND TEST PROCEDURES

!e tests to e carried out s!all include ut not necessarily limited to/-

A. 5isual and ec!anical 2nspection

1. 2nspect p!ysical and mec!anical condition.

=. 2nspect anc!orage, alignment, grounding, and required area clearances.

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. #rior to cleaning t!e unit, perform as-found tests, if required.

9. Clean t!e unit.

+. 5erify correct lade alignment, lade penetration, travel stops, and mec!anical operation.

'. 5erify t!at fuse sies and types are in accordance wit! drawings, s!ort-circuit studies, andcoordination study.

:. 5erify t!at eac! fuse!older !as adequate mec!anical support.

E. 2nspect olted electrical connections for !ig! resistance using one of t!e following met!ods/

- 6se of low-resistance o!mmeter.

- 5erify tig!tness of accessile olted electrical connections y calirated torque-wrenc! met!od in accordance wit! manufacturer8s pulis!ed data.

- #erform t!ermograp!ic survey.

*. est all interlocing systems for correct operation and sequencing.

1. 2nspect insulating assemlies for evidence of p!ysical damage or contaminated surfaces.

11. 5erify all indicating and control devices.

1=. 7urication requirements

- 6se appropriate lurication on moving current-carrying parts.

- 6se appropriate lurication on moving and sliding surfaces.

1. #erform as-left tests.

". $lectrical ests

1. #erform resistance measurements t!roug! olted connections wit! a low-resistanceo!mmeter, if applicale.

=. #erform insulation-resistance tests on eac! pole, p!ase-to-p!ase and p!ase-to-ground wit!switc! closed and across eac! open pole for one minute. est voltage s!all e inaccordance wit! manufacturer8s pulis!ed data.

. easure contact-resistance across eac! switc!lade and fuse!older.

9. easure fuse resistance.

+. 5erify !eater operation.

'. #erform ground-fault test.

C. est 5alues

1. Compare olted connection resistances to values of similar connections.

=. "olt-torque levels .

. icro!m or millivolt drop values s!all not e>ceed t!e !ig! levels of t!e normal range asindicated in t!e manufacturer8s pulis!ed data. 2f manufacturer8s data is not availale,investigate any values w!ic! deviate from adFacent poles or similar switc!es y more t!an +percent of t!e lowest value.

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9. inimum insulation resistance s!all e in accordance wit! manufacturer8s pulis!ed data.

+. 2nvestigate fuse-resistance values t!at deviate from eac! ot!er y more t!an 1+ percent.

2.3 ACCEPTA!LE MANUFACTURERS

R$#$* T %$ S$,$ # P*$#$**$ E,$%*", M"'#"%*$*+ S44,$*+.

PART 3 - E5ECUTION

3.1 INSPECTION

A. $>amine conditions under w!ic! safety and motor disconnects are to e installed. 3otify $ngineer inwriting of conditions detrimental to proper completion of t!e wor. Do not proceed wit! wor untilunsatisfactory conditions !ave een corrected.

3.2 INSTALLATION

A. 2nstall safety and motor disconnect switc!es as indicated, in accordance wit! manufacturer8s writteninstructions, requirements of applicale &tandards, and in accordance wit! recognied industry

practices to ensure t!at installation complies wit! requirements and serves intended function.". Coordinate as necessary to interface installation of safety and motor disconnects wit! ot!er wor.

C. #rotect disconnect switc!es from dirt, moisture and construction deris, susequent and duringinstallation until proFect is accepted y wner.

D. ig!ten connectors and terminals, including screws olts and equipment grounding connections inaccordance wit! equipment manufacturer8s pulis!ed torque tig!tening values for equipmentconnectors.

$. 2nstall disconnect switc!es used wit! motor-driven appliances and motors and controllers wit!insig!t of controller position unless ot!erwise indicated.

0. #rovide o> wit! spare set of eac! sie fuse used on proFect. #rovide nameplate on switc!,indicating equipment served.

G. 2nstall fuses in fused switc!es.

;. #rovide equipment grounding connections, sufficiently tig!t to assure a permanent and effectiveground, for electrical disconnect switc!es.

3.3 FIELD QUALITY CONTROL

A. 6pon completion of installation of electrical disconnect switc!es and after circuitry !as eenenergied, demonstrate capaility and compliance wit! requirements. Close all switc!es to c!ec forproper energiation of all loads. %!ere possile, correct malfunctioning units t!en retest todemonstrate compliance ot!erwise, remove and replace wit! new units and retest.

END OF SECTION 16170

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electrical specifications ,section 16170 safety and motor isolators (disconnects)

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