Metal-Clad Switchgear VacClad-W Medium Voltage Drawout Vacuum Breakers 5 kv (26-Inch Wide) Inch (660.4 mm) Wide 5 kv 250 MVA Switchgear

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1 .- Metal-Clad Swtchgear VacClad-W Medum Voltage (-Inch Wde) General Descrpton October 0 Sheet 00 -Inch (0. mm) Wde MVA Swtchgear Fully Wthdrawn Breaker Automatc Shutters Fused PT Drawer Applcaton Ths narrow wdth VacClad-W MV Metal-Clad swtchgear was desgned for use n nstances where floor space requrements would not allow the ndustry standard -nch (. mm) wde swtchgear. Typcal applcatons nclude not only new constructon but also replacement swtchgear for nstallatons prevously equpped wth -nch (0. mm) wde ar-break devces. Ths lne of swtchgear has also been utlzed where, 0 A, MVA applcatons are commonplace, such as generator and control applcatons. Ratngs The -nch (0. mm) wde swtchgear lne s desgned for use wth Cutler- Hammer Type VCPW-ND Narrow Desgn vacuum crcut breakers rated., 0 BIL, MVA, 0 A maxmum, wth rated man bus of 0 or A. For nstallatons requrng A man breakers wth 0 A feeders, lneups can be bult wth standard -nch (. mm) wde man breaker cubcles and -nch (0. mm) wde feeders. Confguratons -Inch (0. mm) Wde Standard Model The -nch (0. mm) wde desgn s flexble. Avalable confguratons nclude breaker over breaker, one or two auxlary drawers over breaker, breaker over one or two auxlary drawers, or up to four auxlary drawers n one vertcal secton. The standard heght and depth are -nch (.0 mm) and -/-nch (. mm) respectvely. A breaker over auxlary, or auxlary over breaker combnaton can be suppled n reduced depth of -/-nch (0. mm). The depth of breaker over breaker combnaton can also be reduced to -/-nch (0. mm) f power cables for top breaker enter from the top and the cables for bottom breaker enter from the bottom. The man bus locaton and connectons n the standard -nch (.0 mm) hgh -nch (0. mm) wde desgn are 0% compatble wth standard -nch (.0 mm) hgh -nch (. mm) wde vertcal sectons. As a result, addtons to exstng Cutler-Hammer, MVA -nch (. mm) wde VCP-W nstallatons can be smply and rapdly performed wthout costly system modfcatons and transton sectons. Refer to Pages.- and.- for avalable confguratons, dmensons and weghts. -Inch (0. mm) Wde Low Profle Model In addton to the floor space savng offered by the standard -nch (0. mm) wde model, a further savng n the heght and depth of the swtchgear s also avalable. Where heght and depths are an ssue, such as an outdoor powerhouse or n a moble power contaner, the standard -nch (.0 mm) hgh unt can be reduced to an 0-nch hgh (.0 mm), -nch (. mm) deep low profle model. Man bus ratng avalable n the 0-nch (.0 mm) hgh x -nch (. mm) deep low profle model s lmted to 0 A maxmum. It s not compatble n sze or locaton wth standard -nch (0. mm) wde or -nch (. mm) wde, -nch (.0 mm) hgh VCP-W unts. The low profle model s desgned to house breaker over auxlary or auxlary over breaker, or auxlary over auxlary. In order to provde maxmum vertcal space for power cable termnatons, auxlary over breaker confguraton should be used for customer s top entrance cables, and breaker over auxlary confguraton should be used for customer s bottom entrance cables. Auxlary compartments are desgned to accommodate one or two auxlary drawers. That s, up to four auxlary drawers can be nstalled n an auxlary over auxlary confguraton. A set of two lne-to-lne or three lne-to-ground connected voltage transformers, or a sngle-phase control power transformer up to A can be nstalled n each auxlary drawer. Because of the reduced depth, control devces cannot be located on breaker compartment door. control devces should be located on the auxlary compartment doors. Refer to Pages.- for avalable confguratons, dmensons and weghts. For all -nch (0. mm) wde confguratons, multfuncton mcroprocessorbased relays and meters, such as Cutler-Hammer Dgtrp 000 and IQ meters are recommended for reduced panel space. For more nformaton vst: CA000E

2 December 0 Sheet 00 Metal-Clad Swtchgear VacClad-W Medum Voltage Techncal Data Standard VCP-W Crcut Breakers.- Dscusson of changes n the Voltage Range Factor, K, or K-Factor n Crcut Breaker Ratng Structure In and edtons of ANSI C.0, under Table, preferred values for the rated voltage range factor, K, were set to.0 for all ndoor crcut breaker ratngs. Ths was done because nterruptng capabltes of today s vacuum crcut breakers are better represented by K =.0. Unlke old ar-magnetc and ol crcut breakers, today s vacuum breakers generally do not requre a reducton n nterruptng current, as the operatng voltage s rased to rated maxmum voltage, for example from. up to. The nterruptng capablty of vacuum crcut breakers s essentally constant over the entre range of operatng voltages, up to and ncludng ts rated maxmum voltage. The change was also made as a step towards harmonzng preferred ANSI ratngs wth the preferred ratngs of IEC standards. It was further recognzed that t s much smpler to select and apply crcut breakers rated on the bass of K =.0. The change n the K value, however, n no way affects the ratngs and capabltes of crcut breakers orgnally tested and rated on the bass of K > n the earler edtons of C.0. Exstng crcut breakers, wth ratngs based on K >.0, are stll perfectly vald, meet the latest edtons of the standards, and should be contnued to be appled as they have been n the past. The orgnal K >.0 ratngs are nether obsolete nor nferor to the new K =.0 ratngs; they are just dfferent. The new and edtons of ANSI standard C.0 stll nclude the earler K > ratngs as Table A and AA. The change from K >.0 to K =.0 should be mplemented by manufacturers as they develop and test new crcut breakers desgns. The change does not requre, recommend or suggest that manufactures re-rate and re-test exstng breakers to new standard. And accordngly, Eaton contnues to offer both crcut breakers rated on the tradtonal bass of K >.0 just as thousands of those breakers have been appled for varety of crcut swtchng applcatons world wde, and also as Eaton develops new breakers, they are rated and tested to the new K = ratngs. As a leader n vacuum nterrupton technology, Eaton contnues to provde a wde choce of modern vacuum crcut breakers so that user can select the most economcal crcut breaker that can satsfy hs crcut swtchng applcaton. Table.- ncludes capabltes of tradtonal crcut breakers rated on the bass of K >.0 as well as those rated on the bass of K =.0. Table.- ncludes newer crcut breaker desgns, rated on the bass of K =.0, and many of these also have other extra capabltes for those applcatons whose requrements go beyond what s usually experenced n normal dstrbuton crcut applcatons. Table.- ncludes crcut breakers for specal generator applcatons. Table.-. Avalable VCP-W Vacuum Crcut Breaker Types on Symmetrcal Ratng Bass, Per ANSI Standards Identfcaton Values Related Requred Capabltes Voltage Insulaton Transent Values Level Recovery Voltage Crcut Breaker Type 0 VCP-WND 0 VCP-W 0 VCP-W 0 0 VCP-W VCP-W 00 0 VCP-W 00 0 VCP-W 0 0 VCP-W 00 Nomnal Voltage Class Class Nomnal -Phase MVA Class MVA Class Maxmum Voltage V Voltage Range Factor K Note: Refer to Page.- for footnotes. Wthstand Test Voltage Normal Frequency. x 0 µsec. Impulse Crest Contnuous at 0 Hz Amp Short Crcut (at Maxmum ) Crest Voltage I ka E Crest Tme to Crest Rate of Rse of Recovery Voltage Interruptng Tme T µs /µs Cycles Pesble Trppng Delay Y Sec. Reclosng Tme ms Maxmum Voltage Dvded by K V/K Maxmum Sym. Interruptng Capablty K Tmes Short Crcut ➂ KI ka -Second Short- Tme Carryng Capablty KI ka Closng and Latchng Capablty (Momentary). K Tmes Short Crcut. KI ka Crest. K Tmes Short Crcut. KI ka asym Asymmetry Factor for VCP-W Breakers S CA000E For more nformaton vst:

3 .- Metal-Clad Swtchgear VacClad-W Medum Voltage Techncal Data Standard VCP-W Crcut Breakers December 0 Sheet 000 Table.-. Avalable VCP-W Vacuum Crcut Breaker Types on Symmetrcal Ratng Bass, Per ANSI Standards (Contnued) Identfcaton Values Related Requred Capabltes Voltage Insulaton Transent Values Level Recovery Voltage Crcut Breaker Type 0 VCP-W 0 VCP-W 0 0 VCP-W 00 0 VCP-W 0 VCP-W 0 0 VCP-W 0 VCP-W 0 VCP-W 0 VCP-W 0 VCP-W 0 Nomnal Voltage Class Class Nomnal -Phase MVA Class MVA Class Maxmum Voltage V Voltage Range Factor K Wthstand Test Voltage Normal Frequency. x 0 µsec. Impulse Contnuous at 0 Hz Crest Amp Short Crcut (at Maxmum ) Crest Voltage I E ka Crest For capactor swtchng, refer to Table.-. and crcut breakers are UL lsted. and breakers are not UL lsted. For -phase and lne-to-lne faults, the symmetrcal nterruptng capablty at an operatng voltage V I sc = ( Short Crcut ) V o But not to exceed KI. Sngle lne-to-ground fault capablty at an operatng voltage V I sc =. ( Short Crcut ) V o But not to exceed KI. The above apply on predomnately nductve or resstve -phase crcuts wth normal-frequency lne-to-lne recovery voltage equal to the operatng voltage. 000 A contnuous ratng s avalable for /. 000 A contnuous ratng s avalable for. Contact Eaton for detals. RRRV =. E T Tme to Crest Rate of Rse of Recovery Voltage Interruptng Tme Pesble Trppng Delay Reclosng Tme T Y µs /µs Cycles Sec. ms Maxmum Voltage Dvded by K V/K Maxmum Sym. Interruptng Capablty K Tmes Short Crcut ➂ KI ka -Second Short- Tme Carryng Capablty Closng and Latchng Capablty (Momentary). K Tmes Short Crcut. K Tmes Short Crcut -cycle ratng avalable, refer to Table.-. Trppng may be delayed beyond the rated pesble trppng delay at lower values of current n accordance wth the followng formula: (K Tmes Short Crcut ) T (seconds) = Y ( Short Crcut Through Breaker) The aggregate trppng delay on all operatons wthn any 0-mnute perod must not exceed the tme obtaned from the above formula. For reclosng servce, there s No De-Ratng necessary for the Cutler- Hammer VCP-W famly of crcut breakers. R = 0%. Type VCP-W breaker can perform the O-C-O per ANSI C.0; O-0s-CO-s-CO per IEC ; and some VCP-Ws have performed O-0s-CO-s-CO-s-CO- s-co; all wth no deratng. Contact Eaton for specal reclosng requrements. For hgher close and latch ratngs, refer to Table.-. Included for reference only. Asymmetrcal nterruptng capablty = S tmes symmetrcal nterruptng capablty, both at specfed operatng voltage. ANSI standard requres 0 BIL. ratngs are tested to 0 BIL. Type 0 VCP-W 0 crcut breaker s not rated for rapd reclosng. KI ka. KI ka Crest. KI ka asym Asymmetry Factor for VCP-W Breakers S For more nformaton vst: CA000E

4 December 0 Sheet 00 Metal-Clad Swtchgear VacClad-W Medum Voltage Techncal Data Crcut Breakers.- Type VCP-W Crcut Breaker Operatng Tmes The closng tme (ntaton of close sgnal to contact make) and openng tme (ntaton of the trp sgnal to contact break) are shown n Table.-. Table.-. Closng Tme and Openng Tme Control Voltage Fgure.- below shows the sequence of events n the course of crcut nterrupton, along wth applcable VCP-W crcut breaker tmngs. Breaker Ratng Closng Tme Mllseconds Openng Tme Mllseconds Standard -Cycle Breaker Optonal -Cycle Breaker V, V, Vdc V, 0 Vac 0 V or 0 Vac Capactor Trp Optonal Undervoltage Trp Release V, V, Vdc 0 0 Clearng Tme Interruptng Tme Standard: ms ( Cycle) Optonal Avalable: 0 ms ( Cycle) Contact Partng Tme Maxmum Contact Partng Tme = ms (-/ Cycle) Based on Mnmum Trppng Delay Equal to ms (/ Cycle) Short- Crcut Begns Trppng Delay Tme ms (/ Cycle) Mnmum Delay s = ( Cycle) Maxmum Delay Protectve Relay Operatng Tme Auxlary Relay Operatng Tme Control Voltage Energzes Trp Col Openng Tme 0 0 ms for Cycle VCP-W Shunt Trp Operatng Tme Mechansm Operatng Tme Fgure.-. Sequence of Events and Crcut Breaker Operatng Tmes Tmes shown are based on 0 Hz. % dc component capablty (and asymmetry factor S) depend on the mnmum contact partng tme. The % dc component capablty s 0% (S factor.) for all VCP-W crcut breakers. Man Contacts Parts Arcng Tme ms Last Pole Clears - Load ms - Openng Tme 0 ms Arcng Tme Tme (ms) ms Dead Tme (Wth Arcng) + Control Supply Source # Trp - Transfer Intate Source # - b Close - Standard b Contact Transfer Intate Sgnal ms - ms - Closng Tme Makes ms Dead Bus Tme (No Arcng) Approx. 0 ms Total Transfer Tme Fgure.-. Typcal Transfer Tmes Fast Sequental Transfer Tmes shown are based on 0 Hz. CA000E For more nformaton vst:

5 .- Metal-Clad Swtchgear VacClad-W Medum Voltage Techncal Data Crcut Breakers and Swtchgear December 0 Sheet 00 Applcaton Quck Check See Table.- for applcaton of crcut breakers n a radal system suppled from a sngle-source transformer. Short crcut duty was determned usng E/X amperes and.0 multplyng factor for X/R ratos n the range of to 0. Usual Servce Condtons Usual servce condtons for operaton of metal-clad swtchgear are as follows: Alttude does not exceed,00 feet (,000 meters). Ambent temperature wthn the lmts of -0 C and +0ºC (- F and + F). The effect of solar radaton s not sgnfcant. Applcatons Above,00 Feet (,00 m) The rated one-mnute power frequency wthstand voltage, the mpulse wthstand voltage, the contnuous current ratng and the maxmum voltage ratng must be multpled by the approprate correcton factor n Table.- to obtan modfed ratngs whch must equal or exceed the applcaton requrements. Note: Intermedate values may be obtaned by nterpolaton. Applcatons Above or Below 0 C Ambent Refer to ANSI C.., Secton. for load current-carryng capabltes under varous condtons of ambent temperature and load. Applcatons at Frequences Less Than 0 Hz Short Crcut Based on seres of actual tests performed on Type VCP-W crcut breakers and analyss of these test data and physcs of vacuum nterrupters, t has been found that the current nterrupton lmt for Type VCP-W crcut breakers s proportonal to the square root of the frequency. Table.- provdes deratng factors, whch must be appled to breaker nterruptng current at varous frequences. Table.-. Deratng Factors Interruptng Deratng Factors 0 Hz Hz Hz Hz None Short Tme and Close and Latch s No deratng s requred for short tme and close and latch current at lower frequency. Contnuous Snce the effectve resstance of crcut conductors s less at lower frequency, contnuous current through the crcut can be ncreased somewhat. Table.- provdes nomnal current ratng for VCP-W breakers when operated at frequences below 0 Hz. Table.-. Radal System Applcaton Informaton Source Operatng Voltage Transformer MVA Ratng Motor Load.... 0% 0% Up to Up to.. 0 VCP-W ( ka) 0 VCP-W 0 ( ka) VCP-W ( ka) Also ncludes 0VCPW-ND. Transformer mpedance.% or more. other transformer mpedances are.% or more. Table.-. Ratngs 0 VCP-W (. ka) Power Frequency and Impulse Wthstand Voltage Ratngs No deratng s requred for lower frequency. CTs, VTs, Relays and Instruments Applcaton at frequency other than rated frequency, must be verfed for each devce on an ndvdual bass. 0 VCP-W 00 ( ka) 0 VCP-W 00 (. ka) 0 VCP-W 0 (. ka) VCP-W 00 ( ka) 0 VCP-W 0 ( ka) 0 Breaker Type and 0 Symmetrcal Interruptng Capablty 0 VCP-W at the Operatng Voltage 00 ( ka) Contnuous at 0 Hz 0 A A 000 A Nomnal at Frequency Below 0 Hz 0 Hz Hz Hz Hz 0 0 VCP-W 00 (. ka) 0 VCP-W 0 (0. ka) 0 VCP-W 00 (0. ka) Table.-. Alttude Deratng Factors Alttude Above Sea Level n Feet (m) 0 VCP-W 0 ( ka) 0 VCP-W 00 ( ka) Alttude Correcton Factor to be Appled to: Voltage Contnuous,00 (,00) (and Below).0.0,000 (,),000 (,),000 (,),00 (,0),000 (,),000 (,),000 (,),000 (,0),000 (,),0 (,0),000 (,),000 (,),00 (,000),000 (,),000 (,0) For more nformaton vst: CA000E

6 December 0 Sheet 00 Unusual Servce Condtons Applcatons of metal-clad swtchgear at other than usual alttude or temperature, or where solar radaton s sgnfcant, requre specal consderaton. Other unusual servce condtons that may affect desgn and applcaton nclude: Exposure to salt ar, hot or humd clmate, excessve dust, drppng water, fallng drt, or other smlar condtons. Unusual transportaton or storage condtons. Swtchgear assembles when used as the servce dsconnectng means. Installatons accessble to the general publc. Exposure to sesmc shock. Exposure to nuclear radaton. Load Swtchng Table.- showng number of operatons s a gude to normal mantenance for crcut breakers operated under usual servce condtons for most repettve duty applcatons ncludng solated capactor bank swtchng and shunt reactor swtchng, but not for arc furnace swtchng. The numbers n the table are equal to or n excess of those requred by ANSI C.0. Metal-Clad Swtchgear VacClad-W Medum Voltage Techncal Data Swtchgear Mantenance shall consst of adjustng, cleanng, lubrcatng, tghtenng, etc., as recommended by the crcut breaker nstructon book. Contnuous current swtchng assumes openng and closng rated contnuous current at rated maxmum voltage wth power factor between 0% leadng and 0% laggng. Inrush current swtchng ensures a closng current equal to 00% of rated contnuous current at rated maxmum voltage wth power factor of 0% laggng or less, and an openng current equal Table.-. Breaker Operatons Informaton Crcut Breaker Ratngs Maxmum Voltage.,.,.,.,., Contnuous Amperes 0, 000 Short Crcut ka, sym. ka and below ka and above Each operaton s comprsed of one closng plus one openng. to rated contnuous current at rated maxmum voltage wth power factor between 0% leadng and 0% laggng. In accordance wth ANSI C.0, f a short crcut operaton occurs before the completon of the lsted swtchng operatons, mantenance s recommended and possble functonal part replacement may be necessary, dependng on prevous accumulated duty, fault magntude and expected future operatons. Maxmum Number of Operatons Between Servcng,000,000, No-Load Mechancal,000,000,000,00,00 Contnuous Swtchng,000,000,000,00,00 Inrush Swtchng CA000E For more nformaton vst:

7 December 0 Sheet 00 Metal-Clad Swtchgear VacClad-W Medum Voltage Techncal Data Surge Protecton and Instrument Transformers.- Instrument Transformers Instrument transformers are used to protect personnel and secondary devces from hgh voltage, and permt use of reasonable nsulaton levels for relays, meters and nstruments. The secondares of standard nstrument transformers are rated at amperes and/or volts, 0 Hz. Voltage Transformers Selecton of the rato for voltage transformers s seldom a queston snce the prmary ratng should be equal to or hgher than the system lne-to-lne voltage. The number of potental transformers per set and ther connecton s determned by the type of system and the relayng and meterng requred. When two VTs are used, they are typcally connected L-L, and provde phase-to-phase voltages, (Vab, Vbc, Vca) for meterng and relayng. When three VTs are used, they are connected lne-to-ground, and provde phase-to-phase (Vab, Vbc, Vca), as well as phase-to-ground (Va, Vb, Vc) voltages for meterng and relayng. If meterng or relayng applcaton requres phase-to-ground voltages, use three VTs, each connected L-G. If not, use of two VTs connected L-L s suffcent. For ground detecton, three VTs connected n Lne-to-ground/brokendelta are used. A sngle VT, when used, can be connected lne-to-lne (t wll provde lne-to-lne output, for example Vab or Vbc or Vca), or lne-to-ground (t wll provde lne-to-ground output, for example Va or Vb or Vc). Generally, a sngle VT s used to derve voltage sgnal for synchronzng or Over Voltage/Under Voltage functon. Transformers The current transformer rato s generally selected so that the maxmum load current wll read about 0% full scale on a standard -ampere col ammeter. Therefore, the current transformer prmary ratng should be 0 0% of the maxmum load current. Maxmum system fault current can sometmes nfluence the current transformer rato selecton snce the connected secondary devces have publshed one-second ratngs. The zero-sequence current transformer s used for senstve ground fault relayng or self-balancng prmary current type machne dfferental protecton. The zero-sequence current transformer s avalable wth a nomnal rato of 0/ or 0/ and avalable openng sze for power cables of -/ nches (. mm). Specal zero-sequence transformers wth larger wndows are also avalable. The mnmum number of current transformers for crcut relayng and nstruments s three current transformers, one for each phase or -phase connected current transformers and one zero-sequence current transformer. Separate sets of current transformers are requred for dfferental relays. The mnmum pckup of a ground relay n the resdual of -phase connected current transformers s prmarly determned by the current transformer rato. The relay pckup can be reduced by addng one resdual connected auxlary current transformer. Ths connecton s very desrable on man ncomng and te crcuts of low resstance grounded crcuts. When utlzng the MP-000 Motor Protectve Relay, t s recommended that the rato of CT prmary ratng to the motor full load amperes (CTprm/Motor FLA) s selected to fall between 0. to.. Standard accuracy current transformers are normally more than adequate for most standard applcatons of mcroprocessor-based protectve relays and meters. See Table.- for CT accuracy nformaton. Table.-. Standard Voltage Transformer Rato Informaton Ratng-Volts Rato CA000E For more nformaton vst:

8 .- Metal-Clad Swtchgear VacClad-W Medum Voltage Techncal Data Instrument Transformers December 0 Sheet 00 Table.-. Standard Voltage Transformer, 0 Hz Accuracy Informaton Swtchgear Voltage Transformer ANSI Accuracy Maxmum Number Standard Burdens at Volts Burdens at Volts Thermal Ratng Class BIL Per Set and Connecton Ratos W, X, Y Z M ZZ W, X Y M Z C Connecton 0 LL or LG. and LL or LG LL or LG 0 LL or LG,, 0, 0, 0, 0, 0, 0, 0,, 0, 0,, 0, For soldly grounded 0 volt system only or any type 00 volt system. For soldly grounded system only. Note: LL = Lne-to-lne connecton. LG = Lne-to-ground connecton.. LL LG LG.. LL LG LG.. LL LG LG, 00 LL LG LG Volt-Ampere Table.-. Transformers, ºC Ambent CT Rato Meterng Accuracy Classfcaton (MR = Mult-Rato) At 0 Hz Standard Burden B 0. At 0 Hz Standard Burden B 0. At 0 Hz Standard Burden B. Relayng Accuracy Classfcaton Mnmum Accuracy Requred per IEEE C.. Standard Accuracy Suppled n VCP-W Swtchgear Optonal Hgh Accuracy Avalable n VCP-W Swtchgear 0: : 0: 0: 0: : 00: 00: 00: 00: 00: 00: 0: 00: : 0: 000: 000: 00: MR 0: MR : MR 000: MR 0: Zero Sequence 0: Zero Sequence Not lsted n C C C C C C C C0 C0 C0 C0 C0 C0 C0 C0 C C C C C C C0 C0 C0 C0 C0 C0 C0 C0 C0 C0 C0 C0 C0 C0 C0 C0 C C C0 C0 C0 C0 C0 C0 C0 C0 C0 C00 C00 C00 C00 C00 C00 C0 C00 C00 C00 For more nformaton vst: CA000E

9 December 0 Sheet 00 Metal-Clad Swtchgear VacClad-W Medum Voltage Techncal Data Control Equpment.- Control Equpment Crcut Breaker Control Eaton s Cutler-Hammer VCP-W crcut breaker has a motor charged sprng type stored energy closng mechansm. Closng the breaker charges acceleratng sprngs. Protectve relays or the control swtch wll energze a shunt trp col to release the acceleratng sprngs and open the breaker. Ths requres a relable source of control power for the breaker to functon as a protectve devce. Typcal ac and dc control schematcs for type VCP-W crcut breakers are shown on Pages.- and.-. For ac control, a capactor trp devce s used wth each crcut breaker shunt trp to ensure that energy wll be avalable for trppng durng fault condtons. A control power transformer s requred on the source sde of each ncomng lne breaker. Closng bus te or bus sectonalzng breakers wll requre automatc transfer of control power. Ths control power transformer may also supply other ac auxlary power requrements for the swtchgear. For dc control, t would requre a dc control battery, battery charger and an ac auxlary power source for the battery charger. The battery provdes a very relable dc control source, snce t s solated from the ac power system by the battery charger. However, the battery wll requre perodc routne mantenance and battery capacty s reduced by low ambent temperature. Any economc comparson of ac and dc control for swtchgear should consder that the ac capactor trp s a statc devce wth neglgble mantenance and long lfe, whle the dc battery wll requre mantenance and replacement at some tme n the future. Relays Mcroprocessor-based or sold-state relays would generally requre dc power or relable unnterruptble ac supply for ther logc crcuts. Auxlary Swtches Optonal crcut breaker and cell auxlary swtches are avalable where needed for nterlockng or control of auxlary devces. Typcal applcatons and operaton are descrbed n Fgure.- and Table.-. Breaker auxlary swtches and MOC swtches are used for breaker open/ close status and nterlockng. Auxlary contacts avalable for controls or external use from auxlary swtch located on the crcut breaker are typcally lmted n number by the breaker control requrements as follows: Breakers wth ac control voltage: NO and NC Breakers wth dc control voltage: NO and NC When addtonal auxlary contacts are needed, followng optons are avalable: // Breakers: Each breaker compartment can be provded wth up to three Mechansm Operated Cell (MOC) swtches, each wth NO and NC contacts. The MOC swtches are rotary swtches, mounted n the cell, and operated by a plunger on the breaker. Two types of MOC swtches can be provded MOC that operates wth breaker n connected poston only, or MOC that operates wth breaker n connected, as well as test poston. Sgnal: VCP-W Crcut Breaker Man Contacts Breaker Auxlary Swtch a Contact Breaker b Swtch b Contact Intaton of Close Sgnal C Fgure.-. Breaker Auxlary Swtch Operatng Tmes Breakers: Each breaker can be provded wth an addtonal breaker mounted auxlary swtch, wth NO and NC contacts. Another optonal swtch avalable s called TOC Truck Operated Swtch. Ths swtch s mounted n the cell and operates when the crcut breaker s levered nto or out of the operatng poston. Ths swtch changes ts state when breaker s moved from test to connected poston and vce versa. The TOC provdes NO and NC contacts. Auxlary swtch contacts are prmarly used to provde nterlockng n control crcuts, swtch ndcatng lghts, auxlary relays or other small loads. Sutablty for swtchng remote auxlary devces, such as motor heaters or solenods, may be checked wth the nterruptng capacty lsted n Table.-. Where hgher nterruptng capactes are requred, an nterposng contactor should be specfed. Table.-. Auxlary Swtch Contacts Interruptng Capactes Type Contnuous Control Crcut Voltage Auxlary Vac 0 Vac Vdc Vdc Vdc Swtch Amperes Non-nductve Crcut Interruptng Capacty n Amperes Breaker Auxlary Swtch TOC Swtch MOC Swtch Breaker Auxlary Swtch TOC Swtch MOC Swtch Closng Tme t = 0 ms t ± ms a Makes t - ms to - ms Inductve Crcut Interruptng Capacty n Amperes Intaton of Trp Sgnal T Closed Open Openng Tme ms If Interruptng Tme = ms Closed t ± ms Open b a t + ms to + ms Closed Open CA000E For more nformaton vst:

10 .- Metal-Clad Swtchgear VacClad-W Medum Voltage Techncal Data Control Equpment December 0 Sheet 00 Table.-. VCP-W Breaker Stored Energy Mechansm Control Power Requrements Sprng Chargng Motor Close or Trp UV Trp Control Inrush Run Average Run Amperes ma Voltage Amperes Amperes Tme, Sec. Maxmum Vdc Vdc Vdc Vac 0 Vac Table.-. Control Power Transformers Sngle-Phase, 0 Hz Voltage Range Close Trp Indcatng Lght Amperes Taps +-/% --/% Secondary Volts A Class / 0/ 0/ 0/ 0/ 0/ 0/ 0/ 0/ 0/,,,,,,,,,,,,,,,,,,, Lne-to-lne connecton only avalable. Refer to Eaton for other voltages and A ratngs. 0 BIL. For more nformaton vst: CA000E