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Vacuum load-break sw it ch

Hochspannungstechnik Peters & Thieding GmbH

V

Peters

Hochspannungstechnik GmbH

Thieding&

AllgemeineElektroenergieanlagen

Deutschland


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The vacuu m loa d-brea k sw itch LTV is a mu lti-purp ose d iscon ne cto r sw itch o f class E 3,

i .e. it req uires low ma intena nce and h as the capa bility to interrupt higher rat ed cur-

rents an d to close more freq uent ly on short-circuit conditions.

It is a t og gle load -brea k sw itch w ith inte gra ted vacuum inte rrupting cham ber.

The simple, robu st structure a nd t he reliable a rc interrupt ing principle achieve a w ide

range of applications.

The product range comprises load-break switches for the following voltage levelsand rated currents:

12 kV 630 A (1250 A in prepa ra t ion)

24 kV in prepa ra t ion

The load-break switch is available in different versions:

Loa d-brea k sw itch w ith to gg le spring mechanism

Loa d-brea k sw itch w ith to gg le spring mechanism a nd ea rthing switch

Loa d-brea k sw itch w ith sto red en ergy mecha nism

Loa d-brea k sw itch w ith sto red energ y mecha nism a nd ea rthing sw itch

Loa d-brea k sw itch w ith stored energ y mechanism a nd HRC-fuse terminals

Loa d-brea k sw itch w ith stored energ y mechanism, ea rthing sw itch a nd HRC-fuse

terminals

Advantages

excellent electrica l chara cteristics (cla ss E 3), t hus o pera to r saf et y a chieved

no open arc occurs, thus neither t herma l stress (cont act b urn-off ) nor ga semmissions

no blow ing o f t he a rc necessary, thus simple me chanical structure an d reliable

switching o f small current s a chieved

low maintena nce, long lifetime

simple operation because of reduced w eight , low operating t orque a nd a ngle

comp lies w ith t he la t est sta nd a rd IEC 60265-1, 1998

OVERVIEW

2


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T ECHN ICAL DATA

3

Standards: IEC 60265-1 (1998), VDE 0670 Pa rt 301 (1999)

IEC 60694 (1996), VDE 0670 Pa rt 1000 (1998)

IEC 60420 (1993), VDE 0670 Pa rt 303 (1994)

IEC 60129 (1994), VDE 0670 Pa rt 2 (1998)

Electrical Data:

Rat ed voltag e (Ur) kV 12

Rat ed current (Ir) A 630

Rat ed short-time w ithsta nd current (IK) kA 25

Ra te d short -circuit d ura tion (t K) s 3

Rated peak withstand current (Ip) kA 63

Ra te d sho rt-circuit m a king current (Ima ) kV 50 (631))

Rat ed ligh tning impulse w ithsta nd voltag e 1,2/50µs kV 75/85

Ra t ed pow er-f req uency w ithst a nd vo lt a g e kV 28/32

Rat ed f reque ncy (f r) Hz 50/60

Rat ed m ainly active loa d b reaking current (I1) A 630

Rat ed closed loop brea king current (I2a

) A 630

Rat ed cable-charging brea king current (I4a ) A 50 (100)

Rat ed line-charging brea king current (I4b ) A 10

Rat ed e art h-fa ult breaking current (I6a ) A 160

Rat ed cable- an d line-cha rging brea king

current unde r ea rth-fa ult conditions (I6b )A 100

Eart hing sw itch (witho ut f use t erminals)


Ra te s sho rt-circuit d ura tion (t K) s 3

Ra te d sho rt-circuit m a king current (Ima ) kA 63Cla ss B

Eart hing sw itch (w ith fu se t erminals)


Ra te s sho rt-circuit d ura tion (t K) s 1

Ra te d sho rt-circuit m a king current (Ima ) kA 25

Cla ss B1) in cla ss E 2

Type tests: Dielectric pow er-freq uency and lightn ing impulse voltag e w ithsta nd t ests

Short-time an d pea k w ithsta nd current t ests

Making a nd brea king tests, test dut ies 1, 2a, 4a , 4b, 6a, 6b

Loa d-break sw itch-fuse-comb inat ion: te st dut ies 1, 4 und 5


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CONSTRUCTION

4

LTV 12 kV w ith stor ed energy m echanism,

fu se term inals and earth ing switch

The t hree po les of the LTV vacuum loa d-brea k sw itch a re mou nte d o n a ba se

fra me b y cast resin pin-type insulato rs a rrang ed in steps.

The cont a cts a re almost vertica l wh en op en, thus a sma ll insta lla tion d epth

is a chieved. Betw een th e conta ct blade s of ea ch pole there is the a rc inter-

rupting de vice with a uxilia ry cont a ct and a f ully encapsula ted vacuum inte r-

rupting chamb er.

This vacuum cha mbe r is a d evelopment of Peters & Thieding a nd is ma nu-

fa ctured t here as w ell. It consists of a f ixed a nd a moving contact , sealed b y

bellow s.

Vacuum chamber

LTV 12 kV w ith tog gle spring mechanism and earthin g sw itch

Fixed contact Moving contact

Contact blades

Curve plate

Draw-back springs

Interlock slide

Earthing contact

Earthing switchInterrupting device

Making contact

Wing

Actuating journal load-break switch

Stored energy drive mechanism

Actuating journal earthing switch

HRC-fuse


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FUNCTION

5

Figure 1: The sw itch is closed. The cont a ct blad es (1) a nd t he inte rrupting

de vice (2) a re con necte d t o t he m a king cont a ct (3). The cont a cts

inside of the vacuum cha mber (4) are closed a nd pressed t og eth er

by a spring inside of the chambe r enclosure.

Figure 2: The o pening procedu re beg ins. The m a in con ta ct ope ns. The

interrupting de vice is held on to the ma king conta ct b y a ho ok (5).

The current commut a te s to t he interrupt ing pa th . The ma in

contact continues opening. At a particular contact distance the

curve plat e (6) beg ins to push t he g uide bo lts (7) out w ard s and theherew ith conn ected conta cts inside of the vacuum cha mber open .

An a rc occurs in the vacuum cha mb er.

Figure 3: The conta cts inside of t he vacuum cha mber reach the ir ma xima l

distan ce. The a rc exting uishes an d t he current is interrupt ed . The

cont a cts are held in the m aximal dista nce by the curve plate .

Figure 4: During the further opening movement of the ma in conta ct the

release catch (8) reaches the end of the hook, the interrupting

device is relea sed a nd lea ves the ma king cont act.

Figure 5: The interrupting d evice is dra w n ba ck by the d raw -ba ck spring s

(9). The curve pla te a voids an immed iat e closing o f t he cont a cts

inside of the vacuum chamber after the release, but ensures a

w ay-dependent closing movement.

Figure 6: The ma in cont act ha s reached its final OFF-position a nd the inter-

rupting d evice is sw iveled ba ck bet w een t he cont act b lades. The

contacts inside of the vacuum chamber are closed again and the

sw itch is rea dy f or reclosing.

Figu re 1

Figu re 3

Figu re 4

Figu re 5

Figu re 2

Fixed contact

Release catch (8)

Swivel bearing

Enclosure with vacuum chamber

Guide bolt (7)

Figu re 6 Interrupt ing device (wi t hout outer encapsulat ion)

4

3

2

5

6

7

8

9

1


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DESCRIPTION

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Drive mechanismThe LTV is a vai lab le in tw o varian ts: w ith t og g le spring

mechan ism a nd w ith sto red energ y mecha nism by spring s fo r

stora ge of the en ergy for opening. The stored energy mecha-

nism is charged during the closing operation of the switch,

thus a separa te cha rging o perat ion is not necessa ry.

OperationThe sw itch is f itte d w ith a 30 mm d ia. a ctua ting journa l, 90°for right hand or lef t hand mechanisms. Operating of the

sw itch can b e ef fected w ith a doub le-rod, bevel gear o r f lex-

ba ll mecha nism. For remote operat ion a gea red moto r w ith

emergency manua l operat ion in combinat ion w ith a doub le-

rod drive is ava ila ble.

Earthing switchBelow th e LTV a q uick-ma king ea rth ing swit ch type PTE can

be insta l led. I t is mecha nica l ly int erlocked w ith th e loa d-brea k sw itch by a n interlock slide . The slide ca n be disman t-

led a nd the interlock remo ved. The ea rthing sw itch is eq uip-

ped w ith a tog gle spring m echanism, actuat ing journal and

operat ion a re the same a s of t he load -break sw itch.

HRC-fuse terminalsFor the a pplication a s tra nsformer sw itch fuse termina ls fo r

HRC-fu ses a cc. to DIN VDE 0670 pa rt 4 a nd DIN 43625 can be

provided. In connection with a stored energy mechanism a

mechanical trip device is provided. It is released by the blo-w ing pin of one o f t he fuses an d t rips the sw itch three-phase.

Auxiliary switchesLoa d-break sw itch and earthing sw itch ca n be equipped w ith

a uxilia ry sw itches. They ha ve forced-ope rat ed con ta cts fo r

ON- a nd OFF-po sitio n a nd t hus f ully com ply w ith IEC 60694.

Numbe r, insta lla tion a nd a pplication o f t he a uxilia ry sw itches

a re show n in the o verview o f t he sw itch variant s a ccessories.

Moto r-operated double-rod drive

Drive lever with release

Fastener Fuse holder

Trip lever Trip rod Trip shaft

Drive plate(for manualoperation)

Drive rod

Position switchON

Position switchOFF

Stroke cylinder

Gear motor

LTV wit h HRC-fuse term inals


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SW IT CH VA RIA N T S LT V 12 KV

Po le cent res Drive mecha nism Drive sid e Ea rt hing Fuses Type Weig ht

mm sw it ch ca . kg

150 To g g le spring rig ht LTVK 1206 R 150 26

150 To g g le spring lef t LTVK 1206 L 150 26

210 To g g le spring rig ht LTVK 1206 R 210 27

210 To g g le spring lef t LTVK 1206 L 210 27

150 To g g le spring rig ht LTVKE 1206 R 150 36

150 To g g le spring lef t LTVKE 1206 L 150 36

210 To g g le spring rig ht LTVKE 1206 R 210 38

210 To g g le spring lef t LTVKE 1206 L 210 38

150 St o red energ y rig ht LTVS 1206 R 150 32

150 St o red energ y le f t LTVS 1206 L 150 32

210 St o red energ y rig ht LTVS 1206 R 210 33

210 St o red energ y lef t LTVS 1206 L 210 33

150 St o red energ y rig ht LTVSE 1206 R 150 42

150 St o red energ y le f t LTVSE 1206 L 150 42

210 St o red energ y rig ht LTVSE 1206 R 210 44

210 St o red energ y le f t LTVSE 1206 L 210 44

150 St o red energ y rig ht LTVF 1206 R 150 46

150 St o red energ y le f t LTVF 1206 L 150 46

210 St o red energ y rig ht LTVF 1206 R 210 47

210 St o red energ y le f t LTVF 1206 L 210 47

150 St o red energ y rig ht LTVFE 1206 R 150 56

150 St o red energ y le f t LTVFE 1206 L 150 56

210 St o red energ y rig ht LTVFE 1206 R 210 58

210 St o red energ y le f t LTVFE 1206 L 210 58

Accessories

Shunt trip coil Y2DC: 24, 48, 60, 110, 220 V

Moto r drive } AC: 115, 230 VBlocking ma gn et (at the drive mechan ism)

Auxiliary sw itche s:

Loa d -brea k sw it ch ON/OFF S1 a nd S2 2 C + 2 O o r 6 C + 6 O

Ea rthing sw it ch ON/OFF S18 a nd S28 2 C + 2 O o r 6 C + 6 OFuse t ripped S3 (sto red energ y mecha nism only) 1 C + 1 O

Po sit io n d rive ON/OFF S4 a nd S5 (st o re d e ne rg y m ech an ism o nly ) 1 C + 1 O

Loa d -brea k sw it ch ON/OFF S6 a nd S7 (mo tor d rive only) 1 C/O

Ea rthing sw it ch ON/OFF S8 a nd S9 (mo to r d rive only) 1 C/O


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INSTALLATION

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The fo llow ing instructions are t o b e ob served on installat ion of the load -brea k sw itch

to ensure perfect function and avoid dama ges:

For safet y reasons, the sw itch is supplied in the closed po sition w ith th e t og gle

spring relaxed.

The o perating mechanism ha s to be rated for a breakaw ay t orque of max. 240 Nm

(ope ning t orq ue und er norma l con ditions : load -brea k sw itch 80 Nm, ea rthing

sw itch 130 Nm).

Do no t remo ve the g rease from t he conta cts, reg rease if necessary (lubricant type

Isof lex To pa s NB 52 or e q uivalen t ).

1.Insta ll the loa d-brea k sw itch on a flat , vertical an d strong pan el wa ll or correspon-

ding m ount ing rails. Take care tha t t he ba se fram e w ill not be be nt.

2.Adjust th e busbars an d screw the m in a w ay, tha t neither fo rce nor to rque is tra ns-

mitted to t he sw itch conn ections.

3. Insta l l the operating mechanism to match the posit ion of the actuating journal ,

right or lef t .

4. Conne ct au xilia ry sw itches, shunt t rip coil, etc., as fa r as be existing .

5. Check the cont acts fo r soiling, clea n a nd regrea se if n ecessary (see ab ove).

6.Check the conn ection to the sta tion ea rth, estab lish a flexible cable connection if

necessary.

S7

S6

S5

S4

S9

S8

Connect ion auxi l iary sw it ches Shun t t r ip co i l

Auxi l iary switches posit ion ing

S1, S2

S18, S28


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COM M ISSION IN G

M AINT ENAN CE

9

Commissioning1. Clean a ll insulate d pa rts (insulato rs, w ings, va cuum chamb er encapsula tion) with a

dry clot h.

2. Check th e conn ection o f a ll a ccessories (a ux. sw itches, shunt t rip coil, mot or).

3. Check the b usbar connections on tight ness.

4. Check the loa d-brea k switch and ea rthing sw itch on mecha nica l function, if a sto -

red ene rgy mecha nism is provided : check the m echanical tripping b y the fuse pin.

5. Sw itch o n t he a uxilia ry pow er supply, if ap plicable.

6.Check remote opera t ion a nd control , if a pplicable , i.e . function, a nnuncia t ions,

remote tripping.

Attention: Before closing the switch with stored energy mechanism the operationhandle has to be moved in OFF-position and pressed against the OFF-stop.

MaintenanceThe vacuum loa d-brea k swit ch LTV is of cla ss E 3, i.e. o nly low ma inten a nce is requ i-

red.

Reg ular servicing of t he sw itch is how ever recommend ed a ft er:

Operation period of 3 to 5 years, dependent on the ambient condit ions and the

sw itching freq uency.

1000 sw itching cycles indep ende nt of the current (until rat ed current).

3 short-circuit making operations.

Perform th e fo llow ing checks:

1. Clean t he switch w ith a d ry, non-fra ying cloth.

2. Visua l exa minat ion fo r soiling, moisture fo rmat ion, corrosion, exam inat ion of t he

insulation pa rts on creeping pa ths.

3.Clea n the ma in conta cts w ith f at -solvent , check for mechanical da ma ges and w ear.

4. Optiona l: Check the va cuum chamber o n leakag es with a high-volta ge tester (ava i-lable a s accessory): det a ch the dra w -ba ck spring s from t he interrupting device,

move the interrupting d evice backwa rds approx. 45° unti l the g uide b olts rea ch t he

circular section o f t he curve pla te. The cont a cts inside of the vacuum cha mbe r are

now completely open. Fix the interrupting d evice in this position by inserting a

screw, bo lt or similar. Conn ect the high-voltag e tester a cc. to t he relat ed o perat ion

ma nual a nd check the high-volta ge w ithstand capacity of the va cuum chamber.

After test ing pull ba ck the interrupting device bet w een th e conta ct b la des and refa-

sten the dra w -ba ck springs.

5. Grea se the ma in conta cts (lubricant type Isof lex Topa s NB 52 or eq uiva lent) and

lubricate t he bea rings and the m ovable pa rts of the drive mechanism.

6. Mechanical a nd electrica l function t ests of t he sw itch including a ccessories (mot or,

a uxilia ry sw itches, shunt trip coil).


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LTV 12 kV with toggle spring mechanism (right hand mechanism)


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LTV 12 kV with stored energy mechanism and fuse terminals (right hand mechanism)


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Peters

Hochspannungstechnik GmbH

Thieding&

Vacuum load-break sw it ch

V

Class E 3 acc. t o IEC 60265-1 (1998 )

Sw i t ch i n g o f l a r ge t r ansf o rm e r capaci t i e s

No op en a rc

Wear-f r ee con t act s, l o w m a in t enance

Com p act , sp ace sav in g con st r u ct i o n

Hochspannungstechnik Peters & Thieding GmbHSüdring 40 · D-21465 Went orf · P.O. Box 80 07 28 · D-21007 Ha mb urg · Ph on e + 49 (0) 40 72 92-30 · Fa x + 49 (0) 40 72 92-31 59

e-ma il: info @peters-th ieding.co m · Int ernet : htt p://w w w.p ete rs-th ieding .com

Peters & Thieding International GmbH Ringnet Pow er Products Peters & Thieding Romania S.A.Sudhausw eg 8 Room 2003, Queen ’s Place St rada 8 M art ie Nr. 4

D-01099 Dresden No. 74, Queen ’s Rd. Cent ral RO-4800 Baia M are

Germany Hongkong, P.R. China Romania

Phone +49 351 26633 0 Phone +852 25 300 760 Phone +40 62 213 581

Fax +49 351 26633 11 Fax +852 28 015 259 Fax +40 62 213 583

e-mail: p t -in t@aed-t d .com e-mail: k [email protected] e-mail: p et ers& th ied [email protected] .ro

Member of AED-Group

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Con Cámaras de Extinción de Arco en Vacío