siemens - medium voltage equipment range for substations

8/13/2019 Siemens - Medium Voltage Equipment Range for Substations

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Medium Voltage Equipment Range for Substations


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Today, vacuum as an arc

extinguishing medium pro-

vides the most cost-effective

solution for medium-voltage

circuit-breakers. We have op-

timized the vacuum switching

principle to the extent that it

is superior to conventional

technology in all respects.

The most significant

advantages:

Constant dielectric in a

vacuum, there are no decom-

position products and,

because the vacuum inter-

rupter is hermetically sealed,

there are no environmental

influences on it.

Constant contact resistance

the absence of oxidation in

a vacuum keeps the metal

contact surfaces clean. For

this reason, contact resistance

can be assured to remain low

throughout the service life of

the equipment.

Large total current the rated

normal current can be inter-

rupted up to 30,000 times,

and the short-circuit breaking

current an average of 50

times.

Maintenance-free for life

Throughout its entire service

life, the vacuum interrupter

operates reliably at all times

without any form of mainte-

nance. Wear is minimal,

because for instance vacuum

switching requires no cooling.

The arc voltage is thus ex-

tremely low only 20 to 200 V.And, on account of the short

arcing times of max. 15 ms,

the energy consumption in

the contact gap is very low.

That makes for maximum

availability.

Principle of operation

A metal-vapor arc discharge

is initiated by the current to

be interrupted as the contact

pieces open. Current flows

through this metal-vaporplasma until the next current

zero. The arc extinguishes in

the vicinity of the current zero.

The metal vapor loses its con-

ductivity within a few micro-

seconds this very quickly

re-establishes the dielectric

strength of the contact gap.

Depending on the level of the

breaking current, various

contact shapes and sizes are

used:

Radial magnetic field contacts,

with which the arc burns

diffusely up to about 10 kA.

Higher currents burn across

a contracted arc, which is

rotating on the contacts.

Axial magnetic field contacts,

with which the arc remains

diffuse even with high

current levels up to 80 kA.

Vacuum Switching

Arcing with radial and axialmagnetic field contacts


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3AH Vacuum Circuit-Breakers

3AH standard circuit-breaker15 kV/40 kA

Five circuit-breaker modelscover all possible applications

3AH1the maintenance-freestandard breaker

3AH2the breaker for highoperating frequencies

3AH3

the breaker for highswitching capacities

3AH4the breaker for very highoperating frequencies

3AH5the breaker for maximumcost-effectiveness

3AH breakers are also availablein single and double-pole form,for example for traction powersupply applications

The five with the three bigadvantages: versatility,

cost-effectiveness andhigh performance

Technical data and product range

Rated Vacuum circuit-breaker (Type)voltage at

Rated short-circuit breaking current1) (Rated short-circuit making current)

kV kA kA kA kA kA kA kA kA kA

13.1 16 20 25 31.5 40 50 63 up to 80

(32.8) (40) (50) (63) (80) (100) (125) (160) (225)

7.2 3AH1 3AH1 3AH1 3AH1 3AH3 3AH3

3AH2 3AH2

12 3AH5 3AH5 3AH5 3AH5 3AH1 3AH1 3AH1 3AH3 3AH3

3AH1 3AH2 3AH2

15 3AH1 3AH1 3AH1 3AH1 3AH3 3AH33AH2 3AH2

17.5 3AH1 3AH5 3AH1 3AH1 3AH1 3AH3 3AH3 3AH38*)

3AH2 3AH2

24 3AH1 3AH1 3AH1 3AH3

3AH5 3AH2 3AH4

36 3AH5 3AH3 3AH3

3AH4 3AH4

800A 800A 800A 800A 800A 800A 1250A 2500A 1250A 1250A 1250A 8000A

to to to to to to 2) to to to to

1250A 1250A 2500A 1250A 2500A 2500A 3150A 3150A 4000A 12000A

Rated normal current

1) DC component 36% (higher values on request)

2) 3150 A for rated voltage 17.5 kV

*) 3 switches in parallel


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Rated voltage

Rated power-frequency withstand voltage

Rated lightning impulse withstand voltage

Rated frequency

Rated short-circuit breaking current (max.)

Rated short-circuit making current (max.)

Rated short-time withstand current 3 sec. (max.)

Rated normal current

kV

kV

kV

Hz

kA

kA

kA

A

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NXACT combines the advan-tages of vacuum circuit-breakers with additionalintegrated functions.

More functions

Disconnector, earthingswitch, operator panel andinterlock are integrated in asingle breaker module. Themodule is supplied pretestedand ready for installation.

Ease of integration

For the system builder, thismeans minimum projectplanning, ease of installationeven with subsequentretrofitting, no more testing,simplified logistics - thesefeatures mean that NXACTis unbeatable, even with theoverall cost of the substation.

Its compact design minimizesinstallation and commission-

ing time.

In operation, NXACT is notablefor the clear layout of itscontrol panel, which is alwaysaccessible at the front of theswitchgear.

NXACT Vacuum Circuit-Breaker Module

NXACT vacuum circuit-breakermodule, 12 kV

Technical data

12

28

75

50/60

25

63

25

1250/2500


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Components for 3AH Vacuum Circuit-Breakers

Vacuum circuit-breakers areavailable in fixed-mounted aswell as withdrawable form.When they are installed insubstations, isolating con-tacts, as well as fixed matingcontacts and bushings arenecessary. With the appropri-ate components, the 3AHvacuum circuit-breakers canbe upgraded to the status ofswitchgear module.

Components

The following componentscan be ordered for thebreaker:

Isolating contacts

Cup-type bushings with fixedmating contacts

Truck with/or withoutinterlocks

Switchgear modul

Components for 12 kV

Up to 2500A /to 40 kA/1 sec. For 800 mm switchgear panel widthwith 3AH1 - 7.2/12 kV breaker 210 mm pole centre distancewith 3AH5 - 12 kV breaker 210 mm pole centre distance


to 2500A /to 25 kA/1 sec. For 1000 mm switchgear panel widthwith 3AH1 - 24 kV breaker 275 mm pole centre distancewith 3AH5 - 24 kV breaker 275 mm pole centre distance

On request: components for 15 kV

to 2500A /to 40 kA/1 sec. For 800 mm switchgear panel widthwith 3AH1 - 15 kV breaker 210 mm pole centre distancewith 3AH5 - 17.5 kV breaker 210 mm pole centre distance


to 1250A/to 16 kA/ 1 sec. For 1200 mm switchgear panel widthwith 3AH5 - 36 kV breaker 350 mm pole centre distance

Technical data


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Vacuum Circuit-Breakers for Outdoor Applications

The 3AF01 circuit-breaker isespecially suitable for opera-tion in power supply utilitiesand deals with all switchingduties occurring in distributionsystems up to 36 kV. It con-sists of two modules:The lower module comprisesthe steel structure with theoperating mechanism, and theupper module the cross armwith the circuit-breaker poles.

The vacuum interrupters areaccommodated in porcelainhousings.

Advantages at a glance:

Minimal installation andcommissioning time

Minimal maintenancerequired

Suitable for automaticreclosing

Long electrical andmechanical service life

Technical data

Rated voltage 36 kV

Rated frequency 50/60 Hz

Rated lightning impulse withstand voltage 170 kV

Rated power-frequency withstand voltage 70 kV

Rated short-circuit 25 kAbreaking current

Rated short-circuit 63 kAmaking current

Rated normal current 1600 A


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Vacuum contactor type 3TL61 3TL65 3TL71 3TL81

Rated normal voltage kV 7.2 12 24 7.2

Rated frequency Hz 50/60

Rated normal current A 450 450 800 400

Switching capacity accordingto utilization categoryAC-4 (cos= 0.35)Rated making current A 4500 4500 4500 4000Rated breaking current A 3600 3600 3600 3200

Mechanical life ofcontactor Switching cycles 3 106 1 106 1 106 1 106

Mechanical life ofvacuum interrupter Switching cycles 2 106 1 106 1 106 0.25 106

Electrical life ofvacuum interrupter(Rated normal current) Switching cycles 1 106 0.5 106 1 106 0.25 106

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3TL Vacuum Contactors

Vacuum contactors are three-pole contactors for medium-voltage substations withsolenoid-operated mechanismfor high switching frequencyand unlimited closing duration.

They are suitable foroperational switching of AC

devices in indoor systemsand can be used for examplefor the following switchingduties:

Switching three-phasemotors in AC-3 und AC-4mode

Switching transformers

Switching capacitors

Switching ohmic loads(e.g. arc furnaces)

3TL6 vacuum contactor

3TL8 vacuum contactor

The 3TL vacuum contactorsare distinguished by thefollowing features:

Small dimensions

Long electrical life (up to106operating cycles))

Maintenance-free

Optional vertical or horizontalmounting


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From 1 kV to 40.5 kV:

Vacuum Interrupters

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Vacuum interrupters for themedium-voltage range areavailable from Siemens forall applications in the inter-national market from 1 kVto 40.5 kV.

Applications

Vacuum circuit-breakers Vacuum switches Vacuum contactors Transformer tap changersCircuit-breakers for tractionpower supplyAuto-reclosersSpecial applications, forexample in nuclear fusion

Compact designs

Siemens vacuum interruptersprovide very high switchingcapacity in very compactdimensions: For example vac-uum interrupters for 15 kV/40 kA with housing dimen-sions of 125 mm diameter by161 mm length, or for 12 kV/13.1 kA with 68 mm diameterby 115 mm length.

Know-how for specialapplications

If necessary, we are preparedat any time to supplementour standard range by way oftailored, customized con-cepts.

Product range (extract)

Interrupters for vacuum circuit-breakers

Rated voltage 7.2 kV - 40.5 kVRated normal current 630 A - 4000 ARated short-circuit breaking current 12.5 kA - 80 kA

Interrupters for vacuum contactors

Rated voltage 1 kV - 24 kVRated normal current 400 A - 800 A

Vacuum interrruptersin new design


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3CG Vacuum Switches

The 3CG vacuum switchesare multi-purpose switchesconforming to IEC 60265-1and VDE 0670 Part 301.

With these, all loads can beswitched without any restric-tion and with a high degreeof reliability. The electrical andmechanical data are greaterthan for conventional switch-disconnectors. Moreover, the3CG are maintenance-free.

The vacuum switch is there-fore extremely cost-effective.

3CG switches in combinationwith HV HRC-Fuses complywith IEC 60420 and VDE0670 Part 303, when in-stalled in Siemens switch-gear. Maximum ratings forfuses on requests.

Vacuum switches aresuitable for the followingswitching duties:

Overhead linesCablesTransformers

MotorsCapacitorsSwitching under earthfault conditions

Technical data

Rated voltage kV 7.2 12 15 24

Rated lightning impulsewithstand voltage kV 60 75 95 125

Rated short-circuit making current kA 50 50 50 40Rated short-time current (3s) kA 20 20 20 16


Rated ring-main breaking current A 800 800 800 800

Rated transformer breaking current A 10 10 10 10

Rated capacitor breaking current A 800 800 800 800

Rated cable-charging breaking current A 63 63 63 63

Rated breaking current forstalled motors A 2500 1600 1250 -

Transfer current according to IEC 60420, 1990Inductive switching capacity (cos 0.15) A 5000 3000 2000 2000

Switching capacity:

under earth fault conditionsRated earth fault breaking current A 630 630 630 630Rated cable-charging breaking currentunder earth fault conditions A 63 63 63 63Rated cable-charging breaking currentunder earth fault conditions withsuperimposed load current A 63+800 63+800 63+800 63+800

Number of switching cycles with rated normal current 10 0 00 10 000 10 000 10 000

3CG switch:12 kV/800 A


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3CJ1 Switch-Disconnectors


Rated voltage kV 12 15 24

Rated short-time withstand current (1s) kA 20 26 18

Rated short-timemaking current kA 50 65 45

Rated normal current A 630 630 630

3CJ1 indoor switch-disconnectors are multi-purpose types and complywith all the relevant stand-ards, both in basic form andin combination with (make-proof) earthing switches.

The 3CJ1 switch-disconnectoris notable for the followingfeatures:

Modular system of straight-forward design with all im-portant attachments, such asfuses, (make-proof) earthingswitches, motor operatingmechanism, shunt releasesand auxiliary switches.

Excellent dielectric proper-ties, even under unfavorableclimatic conditions, by virtueof the exclusive use of stand-ard post insulators for insula-tion against earth.

3CJ1 switch-disconnector,12 kV


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3D disconnecting and earth-ing switches are suitable forindoor installations up to36 kV.

Disconnecting switches areused mainly to protect per-sonnel working on equip-ment, and must therefore beextremely reliable and safe.This is assured even underdifficult climatic conditions,for example in the event of

occasional moisture conden-sation.

For 12 and 24 kV, make-proofearthing switches with a ratedshort-circuit making currentof 50 or 40 kA have been in-cluded in the range.

3D Disconnecting and Earthing Switches

Technical data

Rated voltage kV 12 24 36

Rated short-time kA 20 20 20withstand current (1s) to to to

63 31.5 31.5

Rated peak withstand kA 50 50 50current to to to

160 80 80

Rated normal current A 630 630 630to to to

3000 2500 3000

3DC disconnecting switch,12 kV


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3GD HV HRC Fuses

Technical data fuse links


Rated short-circuit kA 63 40 31.5 31.5breaking to to to

current 80 63 40

Rated normal A 6.3 6.3 6.3 6.3current to to to to

250 160 100 40

Technical data fuse bases

HV HRC (high-voltage high-rupturing capacity) fuses areused for short-circuit protec-tion in high-voltage switch-gear. They protect switchgearand components, such astransformers, motors, capac-itors, voltage transformers andcable feeders, from the dy-namic and thermal effects ofhigh short-circuit currents bybreaking them as they occur.

3GH fuse bases

3GH fuse bases are used toaccommodate HV HRC fuse-

links in switchgear.3GH fuse bases are availableas single-phase and three-phase versions. On request,a switching state indicatorwith auxiliary switch can beinstalled.

Fuse basewith 12 kV fuse

Fuse link

Rated voltage kV 3.6/7.2 12 24 36

Rated peak withstand current kA 44 44 44 44



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Insulators: 3FA Post Insulators and

3FH/3FM Bushings

Insulators post insulatorsand bushings are used toinsulate live parts from oneanother and from earth andalso to perform mechanicalcarrying and supporting func-tions.

The materials for insulatorsare various cast resins andporcelains.

Innovative solutions, such as

the 3FA4 divider post insulatorfor capacitive voltage indica-tion, provide optimum cus-tomer benefit.

Special designs are also avail-able on request.

Technical data (extract): 3FA1/2 post insulator


Rated lightning kV 60 65 100 145impulse withstand to to to tovoltage 65 90 145 190

Rated power- kV 27 35 55 75frequency to to to to

withstand voltage 40 50 75 105

Minimum failing load kN 1.8 5 5 5to to to to16 25 25 16

3FH5/6 draw-lead

bushing

3FA1/2 post insulator


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Current and Voltage Transformers

Measuring transformers areelectrical devices which trans-form primary electrical varia-bles currents or voltages into proportional, in-phasevariables to ensure that theyare safe for connected equip-ment and operating person-nel.

The product range also in-cludes cast-resin insulatedbushing current transformers

and outdoor current andvoltage transformers.

Technical data and product range block type

Current transformers Voltage transformers

Rated voltage kV 12 24 36 12 24 36

Primary rated current A 10 10 10to to to

2500 2500 2000

Max. thermal ratedshort-time current kA 80 80 80

Sec. thermal limit A 5 5 5current to to to

10 13 17

4MA block currenttransformer

4MS4 outdoor voltagetransformer


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Surge Arresters

Surge arresters have thefunction of protecting theinsulation of installations orcomponents from impermis-sible strain due to voltagesurges.

The product range includes:

Surge arresters for theprotection of high-voltagemotors and dry-type trans-formers.

Range 3EF for cable networkup to 15 kV.

Plug-in surge arresters forthe protection of distributionnetworks.Range 3EH2 for networks upto 42 kV.

Special arresters for theprotection of rotary machinesand furnaces.Range 3EE2 for networks upto 42 kV.


3EF 3EE2 3EH2

For networks of 3.6 4.5 4.7to to to

15 kV 42 kV 42 kV

Rated discharge 1 kA 10 kA 10 kAsurge current

Short-circuit 1 50 16 kA

current strength to to40 kA 300 kA

Powerto the

Si Akti ll h ft Order No E50 001 U229 A4 X 7600

BereichEnergiebertragung und -verteilungGeschftsgebiet MittelspannungP.O. Box 32 20D-91050 Erlangen

http://www.ev.siemens.de

S bj t t h ith t i ti

3EE2 arrester

siemens - medium voltage equipment range for substations

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