Electrical Specifications , Division 16, SECTION 16425 SWITCHGEAR ASSEMBLIES MAIN DISTRIBUTION BOARD

8/12/2019 Electrical Specifications , Division 16, SECTION 16425 SWITCHGEAR ASSEMBLIES MAIN DISTRIBUTION BOARD

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SECTION 16425

SWITCHGEAR ASSEMBLIES MAIN DISTRIBUTION BOARD

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. %ires and cales section 1'1*.

D. Distriution transformer section 1'+*.

$. esting and commissioning, section 1'.

/. &pecification &ection 102 3ounting and 4solation of 3ec!anical and $lectrical &ystems andrelated contract drawings, apply to t!is section of t!e wor.

1.2 DESCRIPTION OF WORK

A. %or includes providing all materials, equipment, accessories, services and tests necessary tocomplete and mae all switc!gears ready for operation in accordance wit! drawings andspecifications.

1.3 QUALITY ASSURANCE

A. 3anufacturers2 /irms regularly engaged in t!e manufacture of switc!gears of t!e types, andcapacities required, w!ose products !ave een in satisfactory use in similar service for not less t!an years and s!all e of one manufacturer, approved y t!e 5a!ramaa, and conform to erequirements set fort! in t!ese specifications.

". &witc!gear s!all e manufactured in accordance wit! t!e following2-

1. "& 06', 4$C 0+ 7 4$C 0 w!ic! outline t!e requirements for electrical power switc!gearand associated apparatus.

*. 5a!ramaa 89egulations for t!e installation of electrical wiring, electrical equipment and airconditioning equipment, latest edition.

+. :atar Construction &pecifications.

!e switc!gear;s manufacturer s!all e on t!e prequalified list of t!e 5a!ramaa. !econtractor s!all secure t!e particular approval of 5a!ramaa to manufacturer;s drawings anddiagrams prior to farication of t!e switc!gear. /ailure in securing 5a!ramaa;s approvalefore and after t!e farication would mean re


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approval in no case s!all mean approval of t!e $ngineer, as t!ese specifications mig!t call for!ig!er t!an specification and performance required y regulations.

&pecifications of components of switc!gear s!all apply to all components, used in any type ofdistriution oard, suc! as instruments, C;s, relays, "3& control etc.

C. 4n case of conflict among t!e referenced standards and codes, t!e more stringent provision willgovern.

D. !e following terms used on t!e Drawings and in t!e &pecifications are equivalent and may e usedinterc!angealy 8switc!gear> and 83ain Distriution "oard>.

1.4 SUBMITTALS

A. #roduct Data2 &umit manufacturer?s data for switc!gears, including si@e, enclosures, and electricalratings and c!aracteristics.

". &!op Drawings 2 sumit dimensional layout on arc!itectural acground drawings.

C. 9elay Coordination

a. &umit to t!e $ngineer a relay and C.". coordination study.

. !e Current-time c!aracteristics must e plotted on a log-log papers s!owing t!at t!e c!oice oft!e C.". and relay settings are correct for coordination, curves plot on computer software arepermitted.

D. 4f selectivity coordination study is failed, contractor is responsile to c!ange any numer ofreaers, relays, suc! t!at t!e selectivity coordination is fully ac!ieved wit! no e=tra cost to t!eowner.

$. &!ort circuit and oltage Drop Calculation

&umit a compre!ensive s!ort circuit study as well as voltage drop calculations ased on t!e actualimpedance values of t!e electrical components suc! as supply s!ort circuit level at t!e 11 5 (s!allnot e less t!an 3A), transformer, us ars and cales...etc. Calculations may e performedy manual met!od or y computer software programs.

PART 2 - PRODUCTS

2.1 GENERAL

A. 3ain Distriution oard(s) s!all e complete factory assemled, uilt-in accordance wit! "& 06',tested and s!ipped ready for installation, complete including ut not limited to t!e following main

components2-

- "us-ar system for t!ree p!ase and neutral, fully s!rouded, insulated and electro-tinned.- %it!drawale motori@ed main air circuit reaers.- ie reaers.- Butgoing moulded case circuit reaers.- Cuicle compartments for aove, free standing type.

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- 9estricted eart! fault (9$/) relay.- Ammeter wit! ma=imum demand indication.- oltmeter - wit! selector switc! for ?B//?, p!ase to p!ase and p!ase to neutral

measurements.- Current transformer of class and class 4 category of suitale ratings.- 9ed, ellow and green p!ase indication lamps.-

E9C type control fuse.- 9emovale copper lin etween F 7 $ usars.- 1 mm* window-in-meter compartment.- Fonmagnetic aluminum gland plates for 5a!ramaa single core cales.- All t!e laels for incoming and outgoing feeders, circuit reaers, etc.

". A power supply unit complete wit! attery c!arger and long life lead acid atteries s!all e suppliedwit! 3D" for tripping of AC"?s t!roug! dc s!unt trip. !e unit s!all e designed to operate on inputvoltage of *0ac, single p!ase, E@ and e on continuous duty at an amient and recommendedy 5a!ramaa.

C. 3D"?s s!all e rated for electricity supply of 01 volts, +-p!ase and neutral, -wire, E@., wit!neutral solidly eart!ed via removale lin. !e equipment s!all e suitale for operation on a system!aving a fault level of 00, A 93& symmetrical for + seconds (A&A certified) or equivalent.

D. 3D"?s s!all e of t!e si@e and numer of sections indicated, and s!all not e=ceed t!e dimensionss!own on t!e drawings or specification !erein.

$. !e entire 3D"?s s!all e s!ipped in one section unless approval is given y t!e $ngineer.

/. 3D"?s manufacturer s!all e independently certified to 4&B "& :uality specification. !eContractor s!all sumit a copy of t!e certification to t!e $ngineer for approval. !e panel assemlers!all e 4&B * certified.

G. 9efer to single line diagrams for rating and type of feeders required.

E. #rovide 5a!ramaa meters and C..?s for eac! incoming and landlord?s section. 3eters s!all e

mounted in separate components in eac! section. All meters s!all e approved and calirated y5a!ramaa.

4. #rior to starting manufacturing of 3D"?s t!e $ngineer?s and 5a!ramaa?s approval s!all e secured.

2.2 CONSTRUCTION

A. !e 3D" s!all e designed and manufactured to form + type * construction as defined in 4$C 0+-1. t!e enclosures s!all e constructed and !aving additional gaseted and cover plates to ac!ieve adegree of ingress protection 4#0. !e 3D" offered s!all !old a current type-tested (A&A certified)or equivalent covering t!e principle elements of construction. !e certificate must e otained y t!emanufacturer and t!ird party compliance will not acceptale.

". !e enclosure s!all e made up of steel frames olted and welded toget!er to form a rigid free-standing dead front structure, wit! flus! flange type s!eet steel doors and covers plates as required.

All sections s!all e uniform dimension and appearance.

C. All sections s!all e faricated of at least *mm t!ic galvani@ed s!eet steel, treated for corrosionresistance after manufacturer, i.e. after forming, welding and !oles punc!ing !ave een completed.!e finis!ing coat s!all e electrically deposited epo=y powder paint inside and outside lig!t

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luegray colour 9AH +*.

D. All incoming and outgoing feeders, cales and usar trunings entries s!all e from t!e top wit!front and near access unless ot!erwise stated or required due to lac of space or s!own ondrawingsI if t!e space is inadequate it s!all e accessile only from front, giving full and unostructedaccess to all components, us ars, cales, glands, and terminations.

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$. 3D" !eig!ts s!all not e=ceed **mm from t!e finis!ed floor. Compartment for future reaers s!alle complete wit! us connections, disconnecting contacts and supporting rails, ready for t!einsertion of a reaer, and wit! insulating covers for t!e disconnecting contacts.

/. All components s!all e of a single manufacturer.

G. Control contacts, au=iliary contacts, relays and small or lig!t mec!anism s!all e enclosed andprotected, and s!all e accessile for repair or ad


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". 4nterrupting capacity s!all e minimum 5A 93& symmetrical.

C. "reaers s!all e drawout type, wit! interlocs to prevent moving a closed reaer into or out of t!econnected position. Eaving +-position2 connected, test and wit!drawn.

D. "reaers s!all e equipped wit! eart!ing device to solidly eart! t!e framewor efore t!e maindisconnecting contacts are engaged and to maintain t!e eart! until after t!e contact !ave separated.

$. 3ain and tie reaers s!all e electrically operated, wit! ey switc! mounted on t!e faceplate.

/. "reaers s!all e completely self-powered wit! no e=ternal control power source required. 4f e=ternalcontrol power is required, 11 dc atteries and c!arger s!all e provided. "atteries to e Fi-Cadtype.

G. "reaers s!all e provided for protection against, s!ort circuits wit! time delay and eart! faults and!ave t!e following functions2

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#. &econdary control contacts s!all e provided on drawout units to automatically connect or disconnectcontrol circuits, as t!e circuit reaer moves t!roug! its positions in t!e cradle.

:. Nnder-voltage trip units s!all e installed on all reaers to provide protection on loss of systemvoltage or low system voltage. !e unit s!all incorporate a time delay attac!ment wit! an ad


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2.6 METERING

A. #rovide all necessary current and potential transformers to operate metering and alarms, and ot!erinterfere units required for full operation of uilding management system.

". #rovide digital totali@ing total of 3%E9 AFD %.

C. #rovide line drives for remote sensing.

D. #rovide digital meters on all main incomer reaers.

$. #rovide indicating lig!ts and relays for signaling eart! faults to t!e miscellaneous alarmsannunciator.

2. ETERNAL CONNECTIONS

A. #rovide us e=tensions and usar truning flanges as required completely coordinated wit! t!eoutgoing usar truning feeders. #rovide us transition section w!ere required wit! olted accesspanels.

". #rovide arrier type terminal locs for all interconnecting and outgoing small wiring. 4dentity terminaland conductors ends y means of suitale approved marers, to agree wit! t!e wiring diagrams.erminal locs s!all e accessile for inspection and testing.

2. TRANSIENT OLTAGE SURGE SUPPRESSOR TSS

A. !e module !ig!-energy transient voltage surge suppressor (&&) s!all e provided. && s!allprovide effective !ig!-energy surge current diversion and e suitale as applicale in AF&44$$$C'*.01 Category A, " and C+ environments, as tested y AF&44$$$ C'*.11, C'*.0.

". !e equipment s!all e designed, manufactured, tested and installed in compliance wit! t!e followingcodes and standards2

1. 4nternational $lectrotec!nical commission (4$C 61) $3C directive 6++'$$C-C$ compliant.

*. Canadian &tandard Association (C&A).

+. American Fational &tandards 4nstitute and 4nstitute of $lectrical and $lectrical $ngineer(AF&44$$$ C'*.11, C'*.01, C'*.0).

0. /ederal 4nformation #rocessing &tandards #ulication 0 (/4#& #N" 0).

. Fational $lectrical 3anufacturer Association (F$3A H&-1 1*).

'. Fational /ire #rotection Association (F/#A *, , and 6).

. Fational $lectric Code (F$C).

6. Nnderwriters Haoratories (NH 100 and NH 1*6+) (&econd $dition).

C. !e system s!all e constructed using multiple surge current diversion modules utili@ing metal o=idevaristors (3B) computer matc!ed to a variance of P 1 volts and tested for manufacturing defects.!e modules s!all e designed and constructed in a manner t!at ensures current s!aring. Nse of gas

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tues, silicon avalanc!e diodes or selenium cells are unacceptale.

D. 1 A + p!ases and eart! && unit s!all e provided.

$. && and all components in t!e suppression pat! ma=imum continuous operating voltage s!all egreater t!at 11K of t!e nominal system operating voltage to ensure t!e aility of t!e system towit!stand temporary 93& over-voltage.

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/. && system s!all e duty life cycle-tested to wit!stand * , 1A, 4$$ C'*.01 category C+ surgecurrent wit! less t!an K degradation of clamping voltage. !e minimum numers of surge t!e units!all e ale to protect against of 1*. life cycle surge per mode and *0, life cycle surge perp!ase.

G. All components, individually fused and rated to allow ma=imum specified surge current capacity.

E. && system s!all e completed wit! unit status indicators, dry contacts for remote monitoring,under voltage detection, p!ase loss monitoring and power loss monitoring.

2.7 CURRENT TRANSFORMERS

A. 3ain Data 2

ype 2 $po=y resin encapsulated.&tandards 2 "& ++6emperature 9ating 2 Class " emperature 9ise&!ort ime 2 00 A for + &econds#rimary oltage 2 ' olts

Butput 2 3atc!ed wit! t!e load of protective devices, interfacing and measuringinstruments and transducers.

9ated secondary current 2 A for measuring instruments.". Accuracies 2

a. Class 1, /or protective circuits of class #* 5a!ramaa requirements.

C. /eatures 2

a. &econdary circuits of eac! C eart!ed t!roug! removale olted copper lin at one point only.

. 9outine test reports for reports for individual C;s.

c. ype test reports for magneti@ing current and related accuracy factor for eac! type and ratio.

d. All outputs connected to test terminal locs equipped wit! removale lins.

e. $asy connection of testing instruments BF HBAD wit!out B#$F circuiting t!e C;&.

f. Au=iliary Contacts.

g. Fo plastic casing.

!. Fo split core type C;s.

2.18 OLTAGE TRANSFORMERS

A. 3ain Data 2

ype 2 $po=y resin encapsulated.&tandards 2 "& +01emperature 9ating 2 Class " emperature 9ise

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". All cale connections s!all e made at fi=ed terminals wit! no intermediate


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equipment s!all e fitted wit! warning laels inscried JDAFG$9 01 4&BHA$ "$/B9$B#$F4FGJ.

$. %arning laels s!all !ave lac letters on a rig!t yellow acground. %!erever possile, letterss!all e not less t!an +mm in !eig!t. Bn small covers and doors letters of *mm or 1mm in !eig!ts!all e used.

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/. Cale o=ed s!all e clearly laeled ot! e=ternally and internally wit! t!e circuit and functionaldevice numer.

G. All terminal locs s!all e laeled relative to t!e respective functional unit.

E. $very control and metering device, selector switc!, pus!utton and indicator lig!t s!all e clearlylaeled to indicate its purpose.

4. 3ain identification laels s!all e provided on t!e assemly toget!er wit! a rating plate.

M. /i=ed and wit! drawale portions of equipment including fi=ed and plug-in devices s!all e laeledwit! drawale portions cross-referenced to t!eir fi=ed part.

5. #roposed engraving details s!all e sumitted for comment prior to engraving.

2.16 COMPONENTS

A. All components s!all e installed in accordance wit! t!e instructions of t!eir manufacturers. !isrequirement does not negate t!e requirement for type and routine testing as specified elsew!ere int!is &pecification.

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2.1 WIRING TERMINALS

A.Cale terminations and space for terminations s!all e suitale for t!e si@es of cale called for in t!edesign, refer to Cale &c!edules.

".erminal locs s!all e made of t!ermosetting melamine or polyamide material wit! a low tracinginde= and good flame resistance, tested to wit!stand a temperature rise of C aove amient

temperature.

C.#rovision s!all e made for permanent laels to e applied to eac! terminal for identification purposes.D.All terminals s!all e mared in accordance wit! D4FD$ standards.

$.All terminals for control wiring s!all !ave provision for plug-in test spills and in addition e fitted wit!isolating lins. Current carrying parts s!all e made of tinned rass or copper.

/.Completely s!rouded terminals of t!e tunnel type s!all e used for cup to 1mmQ. !e screw clampconnection s!all e viration proof, self-locing and suitale for clamping two condo.

G.&tranded cales up to 1mmQ s!all e terminated in copper or copper alloy ferrule s!all retain allstrands of t!e cale.

E.erminals for cales in e=cess of 1mmQ s!all e of t!e doule connection type wit! olted studs fort!e connection of cale lugs. !e terminal and stud si@e s!all e adequate for t!e current carriedand t!e si@e of cale. &uitale insulating partitions and protective covers s!all e provided.

4. All au=iliary wiring e=cept screened cales s!all e connected to incomingoutgoing cales iainsulated terminal locs, screwscrew type, clipped onto D4F rails. !ere s!all e sufficient spaceon t!e D4F rail for future terminal locs of not less t!an 1K or Fo. w!ic!ever is t!e greater.

M.%ires s!all enter terminals singly.

5.#lugs and fi=ed socets for t!e application s!all e provided for t!e termination of screened cales.

H.All terminations s!all e mounted at least .*m aove t!e ase of floor mounted assemlies .

3.All load terminals s!all e suitale for t!e types and si@es of cales as specified in t!e sc!edules anddrawings.

2.17 WORKS TESTS

A. All assemlies s!all e tested in accordance wit! t!e requirements of D4FD$ standards #art 1,plus requirements of associated standards.

". #$ $&$D A&&$3"H4$&

C. %!ere As are specified, certification s!all e provided for all type and routine tests to D4FD$standards.

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D. PARTIALLY TYPE TESTED ASSEMBLIES

%!ere #As are specified, compliance wit! t!e test requirements of "& 06', s!all e eit!er ytype testing or y e=trapolation from type tested assemlies or individual parts of similar,representative construction. erification of t!e ype esting Certification or t!e appropriatee=trapolation calculations s!all e provided. Certificates s!all also e provided for routine tests incompliance wit! D4FD$ standards.

$. Calculation from first principles for temperature rise and s!ort-circuit strengt! will not e acceptale.

/. erification of t!e s!ort-circuit wit!stand strengt! is not required for assemlies !aving a rated #&&Cnot e=ceeding 15A or t!ose protected y current limiting devices wit! a cut-off current note=ceeding 15A.

G. erification of t!e s!ort-circuit wit!stand strengt! is not required for au=iliary circuits connected totransformers w!ose2

(i) rated power dose not e=ceed 15A for a rated secondary voltage of not less t!an 11.or

(ii) rated power does not e=ceed 1.'5A wit! a rated secondary voltage of less t!an 11, and

w!ose relative s!ort-circuit voltage is not less t!an 0K.

E. %ors tests s!all include inspection of all wiring and a complete electrical functioning test.

4. #rotection relays s!all e tested y primary current in


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. erify tig!tness of accessile olted electrical connections y calirated torque-wrenc!met!od

c. #erform t!ermograp!ic survey.

6. Confirm correct operation and sequencing of electrical and mec!anical interloc systems.

a. Attempt closure on loced-open devices. Attempt to open loced-closed devices.

. 3ae ey e=c!ange wit! devices operated in off-normal positions.

. Hurication requirements

a. Nse appropriate lurication on moving current-carrying parts.

. Nse appropriate lurication on moving and sliding surfaces.

1. #erform as-left tests.

11. 4nspect insulators for evidence of p!ysical damage or contaminated surfaces.

1*. erify correct arrier and s!utter installation and operation.

1+. $=ercise all active components.

10. 4nspect mec!anical indicating devices for correct operation.

1. erify t!at filters are in place andor vents are clear.

1'. #erform visual and mec!anical inspection of instrument transformers.

1. 4nspect control power transformers.

a. 4nspect for p!ysical damage, craced insulation, roen leads, tig!tness of connections,

defective wiring, and overall general condition.

. erify t!at primary and secondary fuse ratings or circuit reaers matc! drawings.

c. erify correct functioning of drawout disconnecting and grounding contacts andinterlocs.

". $lectrical ests

1. #erform electrical tests on instrument transformers.

*. #erform ground-resistance tests.

+. #erform resistance measurements t!roug! olted electrical connections wit! a low-resistanceo!mmeter.

0. #erform insulation-resistance tests on eac! us section, p!ase-to-p!ase andp!ase-to-ground, for one minute .

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. #erform an overpotential test on eac! us section, eac! p!ase to ground wit! p!ases notunder test grounded, in accordance wit! manufacturer?s pulis!ed data. 4f manufacturer !asno recommendation for t!is test. !e test voltage s!all e applied for one minute.

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'. #erform insulation-resistance tests on control wiring wit! respect to ground. Applied potentials!all e volts dc for + volt rated cale and 1 volts dc for ' volt rated cale. estduration s!all e one minute. /or units wit! solid-state components or control devices t!at cannot tolerate t!e applied voltage, follow manufacturer;s recommendation.

. Control #ower ransformers

a. #erform insulation-resistance tests. #erform measurements from winding -to-windingand eac! winding-to-ground.

. erify correct function of control transfer relays located in switc!gear wit! multiplepower sources.

6. oltage ransformers

a- #erform insulation-resistance tests. #erform measurements from winding -to-windingand eac! winding-to-ground.

. erify secondary voltages.

. erify operation of switc!gearswitc!oard !eaters.

C. est alues

1. Compare us connection resistances tovalues of similar connections.

*. "olt-torque levels s!ould e in accordancewit! ale 1.1* unless ot!erwise specified y manufacturer.

+. 3icro!m or millivolt drop values s!all note=ceed t!e !ig! levels of t!e normal range as indicated in t!e manufacturer?s pulis!ed data. 4fmanufacturer?s data is not availale, investigate any values w!ic! deviate from similar us ymore t!an percent of t!e lowest value.

0. 4nsulation-resistance values for us andcontrol power transformers s!all e in accordance wit! manufacturer?s pulis!ed data. 4n t!easence of manufacturer?s pulis!ed data. alues of insulation resistance less t!an t!is tale ormanufacturer?s minimum s!ould e investigated. Bverpotential tests s!ould not proceed untilinsulation-resistance levels are raised aove minimum values.

. "us insulation s!all wit!stand t!eoverpotential test voltage applied.

'. Control wiring minimum insulation-resistancevalues s!ould e comparale to previously otained results ut not less t!an two mego!ms.

2.21 ACCEPTABLE MANUFACTURERS

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PART 3 - EECUTION

3.1 INSPECTION

A. $=amine conditions under w!ic! switc!gears are to e installed, and notify in writing ofconditions detrimental to proper completion of wor. Do not proceed wit! wor untilunsatisfactory conditions !ave een corrected.

3.2 INSTALLATION

A. 4nstall switc!gears as indicated, in accordance wit! manufacturer?s written instructions,requirements of a!ramaa regulations and in accordance wit! recogni@ed industry practices toensure t!at installation complies wit! requirements and serves intended function.

". Coordinate as necessary to interface installation of switc!gears wit! ot!er wor.

C. ig!ten connectors and terminals, including screws and olts and equipment groundingconnections, in accordance wit! equipment manufacturer?s pulis!ed torque tig!tening valuesfor equipment connectors.

D. #rovide properly wired electrical connections for switc!gears wit!in enclosures.

$. Doule lugging is not permitted.

/. /ill out switc!gears circuit directory card upon completion of installation wor.

G. #rovide equipment eart!ing connections sufficiently tig!t to assure a permanent and effectiveground for switc!gears.

3.3 FIELD QUALITY CONTROL

A. Npon completion of installation of switc!gear and after circuiting !as een energi@ed,demonstrate capaility and compliance of switc!gear wit! requirements. %!ere possile,correct malfunctioning units at site, t!en retest to demonstrate complianceI ot!erwise, removeand replace wit! new units and retest.

". #rior to energi@ation of switc!gears circuitry, c!ec all accessile connections tomanufacturer?s tig!tening torque specifications.

C. #rior to energi@ation of switc!gears, c!ec wit! eart!ing resistance tester p!ase-to-p!ase andp!ase-to-ground insulation resistance levels to ensure requirements are fulfilled.

D. #rior to energi@ation, c!ec switc!gears for electrical continuity of circuits, and for s!ort circuits.

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3.4 INTER CONNECTION WITH OTHER SYSTEMS

!e system supplier is responsile to provide all required switc!es, au=iliary contacts, relays, wiring,terminal locs transducers to provide signaling and metering information for t!e central control systemand to accept &A9&B#, openclose, set point from it.

9elevant signals are listed under controls, "3& and motor control panels drawings and data sc!edules.

All signals to t!e "3& system s!ould e potential free to actuate devices of less t!an * A. S *0volt.

4n any device will need more t!an * A. at any operating condition t!e supplier s!ould add interposingrelays.

All analog measures coming or going to t!e "3& s!ould e coordinated wit! t!e "3& supplier (eit!er0-* 3A or 1- volt or -1 volt).

END OF SECTION 16425

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Documents

Electrical Specifications , Division 16, SECTION 16425 SWITCHGEAR ASSEMBLIES MAIN DISTRIBUTION BOARD