Mv Circuit Protection Devices

8/9/2019 Mv Circuit Protection Devices

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SECTION [26 18 00] [16341] MEDIUM-VOLTAGE CIRCUIT PROTECTION DEVICES

SICAM

PART 1 - GENERAL

1.1 SCOPE

A. This section defines the Information, Monitoring and Control of the Substation AutomationSystem. The monitoring and control shall be done digitally and from a central location. Thesubstation automation system shall include intelligent electronic de ices !IE"#s$ and fieldde ices %ith local &rocess isuali'ation. The substation automation system shall ha ecommunication interfaces to su&er isory, control and data ac(uisition !SCA"A$ systems. Itshall selecti ely identify and isolate faults. It shall transmit, record and e aluate data.

). The substation automation system shall gather the data of the substation, &lant or field!commands, e ents, counters and measured alues$, to &rocess this ra% data and to for%ardthe resulting information. The data of the substation shall be gathered by the decentrali'edsubstation automation system ia connected IE"s and the rele ant transmission &rotocols. Itshall be configured to &ass rele ant information to the a&&licable obser ation, monitoring or control centers.

C. The substation automation system shall e*ecute the automation tas+s of logical o&erations ands%itching se(uences. A local human machine interface ! MI$ shall be necessary to &erformcontrol and monitoring tas+s.

1.- E/ATE" "OC0ME TS

A. "ra%ings and general &ro isions of the Contract, including 2eneral and Su&&lementaryConditions a&&ly to this Section. The substation automation system shall ha e at least -3 yearse*&erience in de elo&ment, design, engineering and system im&lementation. A reference listincluding the details as sho%n belo% shall accom&any the offer.1. The reference list shall include 433 installations and e*&erience building multi&le IEC

51643 com&liant systems. IEC 51643 im&lemented systems shall be listed and their status and the follo%ing information about each7a. Customer b. ame of 8acilityc. Countryd. "atee. umber of Station 0nitsf. umber of Serial 0nitsg. MIh. Im&lementated Communications &rotocolsi. IEC 51643 com&liance and status

1.$ ot com&liant.-.$ 9es, com&liant and in &rocess:.$ 9es com&liant and commissioned

-. The reference list shall indicate the follo%inga. ighest ;oltage /e elb. igh ;oltage /e els %or+ed atc. Medium ;oltage /e els %or+ed atd. 2as, 1?331 documentation shall be &ro ided.?. Ca&ability Maturity Model !CMM$ rating shall be included. It shall be certified by an

e*ternal auditor and shall be attached to the submittal.

). ard%are "ocumentation

@anuary -4, -314 [Project Name] Medium ;oltage Circuit Protection "e ices SICAM

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1. ard%are documentation shall include a circuit manual, central cabinet>field cabinets andde ice documentation. The de ice documentation shall be stated in the de ice manualand has to include the follo%ing7a. Information on the internal structure and functions !bloc+ diagrams$ of the de ice.b. Technical data of the de ices and their &arts, order details, maintenance

instructionsc. "escri&tion of the functional sco&ed. e&resentation of all interfacese. Instructions for commissioning !de ice s&ecific setting alues$ and fault diagnosisf. Su&&ly of the de ice documentation &er de ice ty&e

-. One de ice manual shall be &ro ided &er de ice ty&e. These are to be handed o er according to the agreed u&on time schedule.

:. The cabinet documentation is to be stated in the circuit manual, to be generated %ith aCA" system or other soft%are tools and to be su&&lied in &a&er form !"I A?$ and on adata carrier. The circuit manual has to include the follo%ing sections7a. Co ering &age, table of contents of dra%ingsb. /ocation diagram !cubicle layout$c. Circuit diagram for central, higher le el functionsd. Circuit diagram &er bay>cubicle, di ided according to functionse. E(ui&ment &lanf. Terminal diagram !e*ternal interface connection$g. Assignment of the interface elements !terminal diagram$h. /ists of com&onents

?. Circuit diagramsa. The circuit diagrams shall include the current &aths in a functional related

assignment of the units. 0nits should be dis&layed in a detached re&resentation%ith their connections. The unit#s inner circuit &aths shall not be dis&layed./abeling of the units shall be done in accordance %ith the &lant identificationsystem "I ?3B1=, Part -. The mar+ing of the brea+ off &oints and references shallbe done in accordance %ith "I ?3B1=, Part :. 8or e aluation &ur&oses,connection &oints shall only be re&resented once in the %iring manual.

4. Terminal diagramsa. Terminal diagrams shall include the construction of the terminal stri& %ith the used

terminal ty&es, terminal accessories, cable ty&es and destination references toconnected de ices.

5. Cabinet layouta. The cabinet ie%s shall dis&lay the &osition of the installed units from the front and

the bac+side. A cross section from the side and the to& shall also be &ro ided.B. E(ui&ment diagram

a. The e(ui&ment diagrams shall dis&lay the e*ternal connection &oints of the unit. An e(ui&ment diagram should e*ist for e ery installed unit. It suffices to dis&laythe schematic internal construction of the unit.

6. Com&onents listsa. Com&onent lists shall include the technical data, ordering data, e(ui&ment names,

the &lace of installation and the amount of units in use inside a cabinet.Com&onent lists should be deli ered as an MS E*cel file and included in the

cabinet documentation.C. umber Of Su&&orting "ocuments, Time Of "eli ery

1. In corres&ondence %ith the &ro ect schedule the follo%ing documents are to be deli eredon the set date and time7

-. Preliminary documentationa. 1* letter format, &erforated, in a binder b. A set of cabinet dra%ings shall be handed to the o%ner - %ee+s before cabinet

construction for a&&ro al.:. Production documentation


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a. Changes to the &reliminary documentation re(uired by the o%ner shall be %or+edinto the &roduction documentation. Only the affected dra%ings shall be re&lacedand handed o er to the tenderee.

?. soft%are alteration note, for a&&ro al &ur&oses,before im&lementation. The follo%ing s&ecifications shall be included7a. Pro ect name, date, old and ne% hard%are>soft%are ersionb. eason for and ty&e of alteration

?. Process Signal /istsa. Process signal>configuration lists shall record all signals that are to be &rocessed

by the soft%are. Assignment are unit or bay orientated and allocates a s&ecific I>Oto a s&ecific signal. A table simultaneously defining %hich information &oints are tobe routed %here71.$ Telecontrol addresses-.$ E ent>Alarm list:.$ MI

b. This list shall be deli ered in MS E*cel format.4. Automatic 8unctions

a. Interloc+ing and automation functions ha e to be documented using a gra&hicconfiguration tool that conforms to IEC 11:1 regulations.

1.: S0)MITTA/S

A. Submit sho& dra%ings and &roduct information for a&&ro al and final documentation in the(uantities listed according to the Conditions of the Contract. All transmittals shall be identifiedby &urchaser name, &urchaser location and &urchaser order number.

). "ocuments for A&&ro al1. 2eneral arrangement dra%ing sho%ing dimensioned ele ation and floor &lan, side ie%s,foundation details, one line diagram and system descri&tion.

-. Panel arrangement dra%ing sho%ing layout of de ices on the &anel doors:. Three line diagrams?. "C Schematics4. ame&late engra ing dra%ings5. )ill of MaterialB. "eli ery Schedule6. eference /ist and uality Certificates as described in Section 1.- abo e


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=. Pro ect Schedule as described in Section :.5.) and :.5.C belo%.

C. 8inal "ocuments7 ecord documentation to include71. "ocuments listed in Section 1.- and 1.:.) abo e-.


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?.$ /o% Maintenance Technology7a.$ igh a ailability %ithout regular ins&ections.b.$ 8an less o&eration %ithout a buffer battery and %ithout rotating &arts.

4.$ "istributed Systema.$ The substation automation system shall be of a distributed nature. It

shall ma+e use of a bus system and serial %iring. This shall result in a&erformance increase, due to a s&litting of the system load and aconsiderable reduction of faults, e*&enditures for cabling, mountingand documentation. It shall aid in trouble shooting.

PART 2 - PRODUCTS

-.1 MA 08ACT0 E S

A. [The metal cla! s"itchgear assem#l$ shall #e as man%&act%re! #$ 'iemens or a((ro)e! e*%al+ ,((ro)e! man%&act%rers are as &ollo"s-1. '.E/EN' Energ$ -. +]

-.- E 0IPME T

A. The substation automation system shall be a distributed system and fit the distributed &lantdesign. [.t shall #e a#le to ex(an! accor!ing to T E E P,N'. N (lans5 as !etaile! in'ection 2+14+] It shall ha e scalable soft%are and hard%are structure. A ty&ical distributedsystem configuration shall ha e three le els71. Station )us !TCP>IP$-. [/%lti(le] Station 0nits:. [/%lti(le] IE"s and 8ield "e ices

). A ty&ical diagramatic distributed system configuration is sho%n belo%7

C. The monitoring and control functions ! MI$ as s&ecified in ['ection 2+8] shall be &art of thesubstation automation system.

". The s&ecific functions of the substation automation system shall be combined %ith those of a&rogrammable logic controller system and e(ui&&ed %ith the communication &ossibilities of theinformation technology %orld of today.

E. It shall be &ossible to integrate the substation automation system into e*isting stations by usingstandard communication &rotocols as listed in this s&ecification.

8. The system shall include71. Cabinet!s$-. Station unit!s$:. Automation functions?. /icences4. A local &rocess isuali'ation system5. Time synchroni'ation by means of an e*ternal time signal recei er ia [GP'] [Ethernet

NTP] [ T (rotocol]+B. connections to SCA"A centers


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6. IE"s and field de ices2. The serial, decentrali'ed &rocess interface shall be im&lemented %ith autonomous IE"s and

field de ices using the corres&onding communication &rotocols. Connection to the s%itchgear iscarried out directly from each bay, %ithout re(uiring additional isolation !measuring transducers,cou&ling relays$.

. Pro&osed conce&tual functional system architecture is diagrammatically gi en belo%7

-.: 80 CTIO S O8 T E S0)STATIO A0TOMATIO S9STEM

A. The substation automation system shall ser e as a control and monitoring de ice for o&eratingthe s%itchgear. The o&erator shall detect the substation status and carry out s%itchingcommands from an MI. The MI shall be connected to the station unit ia the TCP > IP station

bus. The substation automation system shall record and &rocesses all s%itchgear e ents. Eache ent shall be accom&anied by a real time time stam&. The origin of this time stam& shall be inthe de ice %hich ac(uired the e ent.

). The tas+s of the substation automation system shall be distributed logically according to71. 8ield de ices-. Station units:. Process isuali'ation systems

C. All measured and metered alues and all e ents shall be ca&tured by the field de ices %hichare connected to the substation automation system either in a radial or in a bus structure. Thesubstation automation system is connected to a SCA"A system, using a &oint to &oint or %idearea net%or+ telecontrol interface.

". The substation automation system shall fulfill the follo%ing functions71. IEC 51643-. Telecommunication:. Monitoring?. Automation4. Online configuration5. /ocal and remote control > control %ith s%itchgear interloc+ing > s%itching se(uencesB. Serial connection of IE"s and field de ices6. Connection to a local MI=. Archi ing and logging of o&eration and disturbance data


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13. O&en communication channel using OPC client > ser er mechanisms

E. Interloc+ing for )rea+er O&eration1. )ay interloc+s shall be im&lemented locally in the res&ecti e IE"s. The system shall be

ca&able to do this centrally in the station unit.-. igh ran+ing station interloc+ing shall be done by using a generic ob ect oriented

substation e ent !2OOSE$ mechanisms bet%een IEC 51643 IE"s.:. 8or non IEC 51643 de ices high ran+ing station interloc+ing shall be done centrally in

station unit.?. )rea+er &osition shall be set to local or remote at the station unit [as sho"n on the

!iagrams] . The command form the remote control center shall be re ected or e*ecutedbased on the setting.

4. IE" shall be set to local or remote ia a +eyed s%itch [as sho"n on the !iagrams] . Thecommand form the MI shall be re ected or e*ecuted based on the setting of the +eyeds%itch in the IE".

8. )ay and Telecontrol )loc+ing1. )ay and telecontrol bloc+ing shall be im&lemented in the substation automation system.-.


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G. Priority Controlled Message Pre&aration1. Messages acti ated by e ents shall be &rioriti'ed and made a ailable to the system

according to their status. The follo%ing transmission lists or &rocedures shall be used7a. Scan listb. Initiation buffer c. )asic cycle listd. Telegram buffer %ith time tage. Telegram buffer %ithout time tagf. Counter controlled listg. Time controlled list

/. 2rou&ed Messages1. It shall be &ossible to collect se eral single alarms in a single grou&ed alarm indication.

This shall be done %ith ia the gra&hical interface. One grou&ed alarm message shall besent to the control center.

-.? 80 CTIO A/ CAPACIT9 E 0I EME TS 8O T E S0)STATIO A0TOMATIO S9STEM

A. This ca&acity shall be a ailable should future e*&ansions demand it.

). The modularly designed substation automation system shall meet the information &rocessingre(uirements during normal o&erating conditions and during fault o&erating conditions. Thisincludes71. Processing of u& to 13,333 master and -3,333 sla e data&oints of information-. Connection for u& to 143 field de ices %ith one unit:. Connection for u& to 5 additional station units in a distributed system?. ot stand by redundant configuration as a standard function

-.4 I TE 8ACE E 0I EME TS

A. The station unit shall &ro ide the telecommunication functionalities of an T0 and &ro idecommunication to SCA"A systems. Additional T0 shall not be re(uired. It shall be &ossible toconnect u& to 4 inde&endent SCA"A systems to the substation automation system.

). The ariability and e*&andability of the substation automation system de&ends mainly on itse*ternal interfaces. The system shall su&&ort the follo%ing &rotocols to ensure o&timal and o&en

system o&eration and &lanning71. Telecontrol Protocolsa. " P ;:.33 /e el -b. Telegyr 6=B=c. IEC 536B3 4 131d. IEC 536B3 4 13?

-. IE" and satellite T0 &rotocolsa. IEC 51643b. IEC 536B3 4 13:c. IEC 536B3 4 131d. " P ;:.33 /e el -e. Profibus 8MSf. Profibus "P !IEC 51146 > E 431B3$g. MO")0S ! T0 format and ASCII$

:. O&en 2ate%aysa. OPC ser er and client

C. All the decentrali'ed station units of the substation automation system shall communicate %itheach other ia an Ethernet TCP > IP station bus. The lin+ing u& of the IE"s shall be done in a[(oint to (oint] [#%s str%ct%re] [)ia the Ethernet T P .P station #%s]+

-.5 TIME S9 C O IHATIO


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A. The substation automation system shall be the cloc+ time master in the system and shallcyclically synchroni'e all connected MIs connected ia Ethernet, IE"s and satellite T0s%hen used %ith &rotocols that su&&ort this functionality.

). The station unit shall be synchroni'ed ia a71. 2PS cloc+ connection-. Master cloc+ connected to the TCP>IP station bus:. Telecommunication &rotocol !that su&&orts Time Syncroni'ation$.

C. The time stam& for all &rocess e ents shall be gi en by the IE"s. This shall be transferredthrough the substation automation system as an integral &art of the e ent information. The realtime time stam& shall ha e a resolution of 1ms.

-.B STATIO 0 IT

A. The station unit of the substation automation system shall fulfill the follo%ing re(uirements71. 2eneral7

a. Embedded o&erating system on non rotating silicon dis+b. Self diagnostic and su&er isory functionalityc. 8anless o&eration

-. CP07a. Modern &rocessorsb. igh fault tolerance !MT)8 of 133,333 hours$c. Shall ha e /E"s for the indication of the o&erating state.

-.6 MI

A. A fully gra&hical &rocess isuali'ation system forms the interface bet%een the o&erator and thesubstation automation system. All information shall be handled and dis&layed in real time. Thestation status shall be e*actly dis&layed and recorded. The MI shall contain a library %ith&redefined symbols used for substation automation. The system shall use the library of symbolsfor substation automation.

). The information originating in the substation automation system and re(uired in the MI shallbe created from the


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O. [,n a((lication shall #e (ro)i!e! &or &a%lt recor! anal$sis+ .t shall allo" the a%tomatic collecting o& &a%lt recor!s o& the connecte! (rotection !e)ices 9&or .E 618;05 Pro&i#%s/'5 .E 60870 ; 103: into a local archi)e o& the relate! station %nit+]

P. [,%tomaticall$ collect all the &a%lt recor!s o& the !istri#%te! s%#station a%tomations$stem [an! a((ro)e! s%#station a%tomation s$stems]5 in a central archi)e+ Thecollection o& &a%lt recor!s shall #e store! [in the to&ological folder. A &o& u& %indo% shallannounce the arri al of ne%ly do%nloaded records. After an o&erator ac+no%ledges the ne%fault records, they shall disa&&ear from the se&arate folder for ne% fault records. The faultrecords in the central archi e shall be sa ed in the comtrade format.

-.= IE"S

A. All IE"s shall ha e a distincti e uniform design and shall be configurable for &rotection andcontrol functions %ith a single user friendly tool. The automation, &rotection and control shall be&roducts manufactured by a sole source, the bidder. The digital>numerical de ices shall alsomeet control and monitoring tas+s. They shall be fle*ible in functionality. These &rotection andfield de ices shall ha e the follo%ing functions71. A gra&hical dis&lay and +eyboard %ith at least 13 numerical +eys and cursor +eys for user

friendly local o&eration-. At least B /E"s %hich can be ma&&ed %ith t%o status /E"s:. 0niform loo+ and feel and a uniform and trans&arent design?. All o&erations are secured using access &ermissions4. All o&erating actions such as readout of information or s%itching can be done %ithin the

bay using the bay &anel and>or the +ey s%itch.5. 8ast, sim&le and fle*ible mounting

B. An integrated +ey s%itch for s%itch urisdiction shall be a ailable6. An integrated +ey s%itch for non interloc+ed local control shall be a ailable

-.13 CO 8I20 ATIO

A. S&ecific soft%are and &rogramming +no%ledge shall not be re(uired for configuring ando&erating the standard functions of the substation automation system. The &arameters re(uiredfor o&erations and system management shall be dis&layed in a user friendly and o&erator&rom&ted dialog mode based on Microsoft


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-. ierarchic sorting criterion for fields

E. "rag dro& shall be a ailable for easier engineering.

8. The configured data shall be chec+ed on line for consistency. Errors as a result of &lain te*tmessages ha e to be dis&layed in the online dialog. Color mar+ings of a fault shall differ fromthat of the error free &arameters. Errors ha e to be dis&layed as hy&erlin+s %hich lead directly

to the related &arameter. An e*tensi e hel& system shall su&&ort conte*t sensiti e and detailed(uestions online.

2. The substation automation system shall be an o&en system. The automation functions shall beconfigurable. They include command &rocessing, configuration of o&erating se(uences,interloc+s and generation of deri ed information. A gra&hic configuration system, in com&liance%ith IEC 511:1 :, shall be a ailable and o&erational. A identification number and

year of manufacture-. Com&any name:. E(ui&ment identifier !e.g. 8-3?$ on the front and bac+ of the de ice as %ell as on the

&lace of installation

". The station unit is to be installed in a standard cabinet %ith an IP4? degree of &rotection. o fanshall be re(uired for o&eration.1. Cabinet dimensions7 --33mm * =33mm < * 533mm "-. Material7 1.4 mm sheet steel, mounting &late and rear &anel - mm sheet steel:. Color7 A/B3:- !Silica grey$ trim7 rail S 51B !Petrol$?. Cable entry7 bottom !8loor &an : &arts$4. "oor loc+age7 Es&agnolette loc+ and double bit +ey

E. Cabinets that are &laced in a ro% shall ha e full length side &anels !necessary for com&artmentali'ation$. All cabinets shall be e(ui&&ed %ith trans&ortation eyes.

8. All units and com&onent cabinets shall be in an ambient tem&erature bet%een 3KC and L?3KC.0nits and com&onents installed in areas %here tem&erature are outside of the range shall ha eforced entilation or heaters to maintain &ro&er o&eration tem&erature.

2. Connection to an AC &o%er su&&ly re(uires the follo%ing71. 1 Main Molded Case )rea+er, 1 &ole-. Molded Case )rea+er %ith au*iliary contacts and %iring to a monitoring circuit

. Connection to a "C &o%er su&&ly re(uires the follo%ing71. 1 Main Molded Case )rea+er, - &ole-. Molded Case )rea+er %ith au*iliary contacts and %iring to a monitoring circuit

I. The connection system shall be im&lemented ia71. Po%er su&&ly and PE terminals !5 mm - $


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@. All com&onents shall be &ro&erly isolated against touch oltages.

G. The a&&lied units and com&onents shall %ithstand the high oltage tests %ithout e*ecuting anyun%anted or failed functions !high and im&ulse oltage tests interference immunity test$.

/. A double shell coiled cable shall be used for installing o&tical fiber connections.

M. /ess than 63N of internal and e*ternal cable channels shall be assigned so changes can bee*ecuted..

. The metallic surfaces used for grounding shall be non corrosi e and shall &ossess goodelectrical conducti ity. Painting and non conducti e surface treatment shall not be allo%ed.

O. The units shall be connected using grounding stri&s. Stri& length shall be as short as &ractical.Cabinet grounding shall be done using a grounding bar. The bar shall be connected to the&lant#s ground.

P. The central cabinet and all com&onents re(uired shall be installed, tested and %ired. Theseinclude, among other things71. Station 0nit-. MI ser er com&uter including Ethernet com&onents:. Serial connections [i& nee!e!]

a. ['erial inter&aces &or the connection o& the net"or= control centers] b. ['erial inter&aces &or the connection o& .E>s an! &iel! !e)ices]

?. Time signal recei er com&lete %ith antenna, lightning &rotection and antenna cable.

-.1- CO 8I20 ATIO

A. The o%ner#s engineer shall &ro ide chec+ lists for each configurable de ice. The MI screensshall be illustrated in detail e*&laining both loo+ and functionality. After the o%ner#s a&&ro al,these lists shall be the official basis for the configuration of the system. The configuration &hasemust include the follo%ing items71. Ma+ing of configuration lists, signal lists and MI screens-. Configuration of IE"s and field de ices:. E*&orting of the data of the IE"s and field de ices in to the substation automation system?. Configuration of the substation automation system4. Configuration of the MI!s$5. Ty&ical testing of the configuration !communication, each data ob ect in both directions$B. "eli ery of all rele ant configurations on a C"

). ['ee ,((en!ix &or the con&ig%ration chec= lists+]

-.1: 2E E A/ E 0I EME TS

A. Climatic and Ambient Conditions

8actor O&eration Trans&ort and Storage

Ambient tem&erature

B=4 hPa to 1363 hPa

1$ 553 hPa to 1363

3 KC to 44 KC F?3 KC to B3 KC

relati e humidity ! $ 13 N to =3 N 13 N to =3 N

acce&table air

&ressureB=4 hPa to 1363 hPa 1$ 553 hPa to 1363 hPa

acce&table

tem&erature changes

3.4 G>min, no condensation

!but not to e*ceed 13 G in :3 minutes$


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1. At higher altitudes !i.e. -333 m$, reduced entilation may ma+e it necessary to reducethe ma*imum o&erating tem&erature and use a fan.

). Physical e(uirements

8actor O&eration Trans&ortation and Storage

Oscillation stress in

acc. %. IEC 53356 - 5

8c test, -3 cycles on : a*es7

13 to 51 '7 3.- mm am&litude

51 to 433 '7 1=.5 m>s-

13 cycles on : a*es7

4 to = '7 :.4 mm am&litude

= to 433 '7 =.6 m>s-

Shoc+ stress in acc. %.

IEC 53356 - -B

Ea test, half sine, : each &er

a*is in both directions7

:33 m>s-, 11 ms

Shoc+ stress in acc. %.

IEC 53356 - -=

alf sine, 1333 shoc+s &er

a*is7 -43 m>s-, 5 ms

C. Electromagnetic Com&atibility

S&ecification Testing in Accordance %ith

Interference immunity against discharge of

static electricity !ES"$

"ischarge through the air

"ischarge on contact

E 51333 ? -71==4

6 +; 1$

? +; 1$Interference immunity against fast

transient interference !bursts$ Po%er su&&ly cables for 1-3>-:3 ;

AC Signal cables !in&ut>out&ut and

bus cables$

E 51333 ? ?71==4

- +;

- +; -$

Interference immunity against surge

oltages :$ Po%er su&&ly cables for 1-3>-:3 ;

AC Po%er su&&ly cables for -? ; "C

E 51333 ? 471==4

1 +; symmetrical ?$

- +; unsymmetrical ?$

3,4 +; symmetrical >unsymmetrical :$Interference immunity against electro

magnetic fields Am&litude modulated 8, 63 to

1333 M ' 1$

E 51333 ? :71==5

13 ;>m 4$

63N AM !1 + '$


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Interference immunity against electro

magnetic fields Pulse modulated 8, =33 M ' 1$

E 51333 ? :71==5 E ; 43-3?71==4

13 ;>m 4$

43N E", -33 ' re&etition fre(uency

Interference immunity against cable

conducted interference, induced by highfre(uency fields

3.14 to 63 M '

E 51333 ? 571==5

13 ; 4$

63N AM !1 + '$

source im&edance 143

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Mv Circuit Protection Devices