SHS2Gas-insulated switching and isolating apparatus

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716

TYPES AVAILABLE

OVERALL DIMENSIONS

DESCRIPTION

OPERATING MECHANISMS

ACCESSORIES

SWITCHBOARD APPLICATIONS

FUSES

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DESCRIPTION

GeneralThe SHS2 switching and isolating apparatus consist of gas-insulatedswitch-disconnectors and isolators, suitable for use in medium voltagemetal-enclosed switchboards.They are used in secondary distribution substations for supplying lines,power transformers and ring networks.

Technical characteristicsThe SHS2 switch-disconnectors and isolators are made up of a stainlesssteel cylindrical enclosure, a set of three top insulators and a set of threebottom insulators made of epoxy resin, and a front operating mechanism.The blade contacts for isolation, breaking, closing and earthing are arrangedinside the cylinder in SF6 gas atmosphere at a pressure of 125 kPa absolute.The unit is the sealed for life type complying with the IEC 60694 Standards.It is therefore free from any problems of gas tightness.A gas exhaust valve is located in the rear part of the cylinder for any over-pressure.The contacts can take up three positions: CLOSED - OPEN - EARTHED.The position of the contacts can be verified from the front of the operatingmechanism by means of a reliable indication, in compliance with IEC 60129Standards.The three top insulators act as a support for the fixed contacts and allowfixing of the main busbars.The three bottom insulators act as a support for the moving contacts andallow connection of the medium voltage cables or of the busbars.

1 Moving contact operat-ing shaft

2 Top insulator3 Upper fixed contact4 Gas exhaust valve5 Stainless steel

enclosure6 Operating mechanism7 Bottom insulator8 Moving contact9 Earth contact

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CLOSED OPEN EARTHED

Furthermore, the metal segregationprovided by the enclosure consider-ably reduces the possibility of a short-circuit between the phases andbetween the upper and lower con-tacts of the same phase due toleakage currents.

The stainless steel enclosure pro-vides a metal earthed segregationbetween the busbar compartmentand the feeder compartment of theunit the apparatus is installed in.This characteristic ensures maximumpersonnel safety during any interven-tion in the feeder compartment, suchas replacement of one or more fusesor cable maintenance, even with themain busbars energised.

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Compliance with Standards

Isolator • IEC 60694• CEI EN 60694Common requirements for high voltage apparatus.

Switch-disconnector • IEC 60694• CEI EN 60694Common requirements for high voltage apparatus.

• IEC 60282.1• CEI EN 60282.1Fuses with voltage higher than 1000 V.Part 1: current-limiting fuses.

Switch-disconnector • IEC 60420 • IEC 60694combined with fuses • CEI EN 60420 • CEI EN 60694

Switch-disconnectors combined with high voltagefuses for alternating current.The fuses must comply with DIN Standards.

Degrees of protection

Stainless steel enclosure IP65

Operating mechanism IP3X

DESCRIPTION

• IEC 60129• CEI 17.4Isolators and earthing switches with alternating current andvoltage higher than 1000 V.

• IEC 60265-1• CEI 17-9/1Control breakers and switch-disconnectors for high voltage.Part 1: Control breakers and switch-disconnectors forrated voltages higher than 1 kV and lower than 52 kV.

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[kV]

[kV]

[kV]

[kV]

[kV]

[A]

[kA]

[kA]

[A]

[A]

[A]

[A]

[A]

[Hz]

Electrical characteristics

Rated voltage

Withstand voltage towards earth and between phases (50-60 Hz - 1 min)

Withstand voltage between open contacts (50-60 Hz - 1 min)

Impulse withstand voltage towards earth and between phases

Impulse withstand voltage between open contacts

Rated normal current (40 °C)

Rated short-time withstand current (1 s)

Rated making capacity on short-circuit

Rated breaking capacity

– Mainly active load

– No-load transformer

– No-load line

– No-load cable

– Ring circuit

Electrical life

Mechanical endurance

Rated frequency

24

50

60

125

145

400 630

12,5-16-20 12,5-16-20

31.5-40-50(*) 31.5-40-50(*)

400 630

4 ... 16 4 ... 16

25 25

50 50

400 630

Class E3 - Class A

Class M1

50-60

(*) For 50 kA please contact us.

Quality System

Complies with the ISO 9001 Standards, certified by an external independent organisation.

Environmental Management SystemComplies with the ISO 14001 Standards, certified by an external independent organisation.

Test laboratoryComplies with ISO 45001 Standards, accredited by an external independent organisation.

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OPERATING MECHANISMS

GeneralThe switch-disconnectors use T1 and T2 type oper-ating mechanisms with separate operating seatsfor breaking and earthing operations.The isolators use T3 and T4 type operating mecha-nisms with a single operating seat.

Switch-disconnector operatingseat

Earthing switch operatingseat

Interlocking lever between switch-disconnector and earthingswitch

Mechanical position indicators ofthe mimic diagram

Voltage indicator lamps(on request)

Key locks on switch-disconnector operation(on request)

Key locks on earthing switchoperation (on request)

SHS2/T2F switch-disconnector operating mechanism (type T2).

T1 Operating mechanism with independentoperation on exceeding dead centre

This enables rapid either manual or motor-operatedclosing and opening of the switch-disconnector withoperating speed independent of the operator,obtained by using a single spring.Closing or opening takes place by charging theabove-mentioned spring until it exceeds deadcentre.It also carries out rapid manual closing of theearthing switch with operating speed independentof the operator. On the other hand, earthing switchopening speed depends on the operator.It is used in SHS2/T1, SHS2/T1M, Mix-L, Mix-Lmand Mix-U type switch-disconnectors.

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T2 Stored energy operating mechanismwith independent operation

This enables rapid manual closing of the switch-disconnector with operation independent of theoperator, obtained by means of a spring chargeduntil it exceeds dead centre.During the closing operation, a separate spring isautomatically charged, storing the energy foropening.Switch-disconnector opening can be carried outby means of:– an operating lever– a shunt opening release (applied onto the

operating mechanism itself)– a release system activated by the fuse striker

(in the case of even a single fuse blowing).It also carries out rapid manual closing of theearthing switch with operating speed independentof the operator. On the other hand, earthing switchopening speed is dependent on the operator.It is used in SHS2/T2, SHS2/T2F and Mix-T typeswitch-disconnectors.

T3-T4 Operating mechanisms with dependentoperation

These allow manual closing of the isolator andearthing switch with operating speed dependingon the operator. Closing and opening is obtainedby means of the operating lever.The lever can only be removed after completionof the operation.The T3 type of operating mechanism is used inSHS2/I, SHS2/IF and SHS2/IB type isolators.The T4 type of operating mechanism is used inSHS2/ES type earthing switches.

Isolator and earthing switch operating seat

Key locks on isolator andearthing switch operation(on request)

Key interlock between isolatorand circuit-breaker

Mechanical position indicatorsof the mimic diagram

Voltage indicator lamps(on request)

SHS2/IB isolator operating mechanism (type T3).

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ACCESSORIES

1 Key locksThese allow the apparatus to be locked in theclosed or open position.It is possible to combine a maximum of two keylocks for the T1, T2 and T4 operating mechanisms,and a maximum of three key locks for T3 operatingmechanisms.

2 Auxiliary contactsThese signal the position of the apparatus state.A maximum of two + two auxiliary contactscan be combined for each position (closed/open/earthed).

3 Shunt opening releaseThis is an electromechanical device which, follow-ing energisation of an electromagnet, activates therelease lever of the operating mechanism makingthe switch-disconnector open. This application isonly compatible with stored energy operatingmechanisms (T2 type).Power supply voltages: 24, 48 V d.c.; 110, 220 Vd.c. and V a.c.

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4 Voltage indicator lampsThese can be supplied with one or two sets ofthree lamps integrated in the operating mechanismcasing.The device is preset with sockets for checkingphase concordance.It can be combined with the crosspiece with capaci-tive insulators.

6 Door lockThis is a mechanical device which does not allowthe unit door to be opened with the earthing switchopen.

5 Crosspiece with insulatorsThis can be supplied to complete the switchboardin the versions with supporting insulators or, alter-natively, with supporting capacitive insulators, incombination with the voltage indicator lamps.

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Fig. 2 Fig. 3Fig. 1

Type U [kV] In [A] Icw [kA]

SHS2/T1 24.04.12 24 400 12,5

SHS2/T1 24.04.16 24 400 16

SHS2/T1 24.06.16 24 630 16

SHS2/T1 24.06.20 (1) 24 630 20

SHS2/T2 24.04.12 24 400 12,5

SHS2/T2 24.04.16 24 400 16

SHS2/T2 24.06.16 24 630 16

SHS2/T2 24.06.20 (1) 24 630 20

SHS2/T2F 24.04.12 24 400 12,5

SHS2/T2F 24.04.16 24 400 16

SHS2/T2F 24.06.16 24 630 16

SHS2/T2F 24.06.20 (1) 24 630 20

SHS2/T1M 24.04.12 24 400 12,5

SHS2/T1M 24.04.16 24 400 16

SHS2/T1M 24.06.16 24 630 16

SHS2/T1M 24.06.20 (1) 24 630 20

Switch-disconnectorsSHS2/T1: three-positions switch-disconnectorwith manual operating mechanism on exceedingdead centre.It is normally used for incoming/outgoing units.(Fig. 1).

SHS2/T2: three-positions switch-disconnectorwith manual stored energy operating mechanism.It is normally used for incoming/outgoing unitsand can be fitted with a shunt opening release.(Fig. 1).

SHS2/T2F: three positions switch-disconnectorwith manual stored energy operating mechanism,fuse-holder frame, release device for fuse blown,earthing switch on the load side of the fuse-holder frame.It is normally used for transformer protectionunits and can be fitted with a shunt openingrelease (Fig. 2).

SHS2/T1M: three-positions switch-disconnectorwith motor operated mechanism.It is normally used for incoming/outgoing units(Fig. 1).

TYPES AVAILABLE

(1) For this type please contact us.

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Fig. 5Fig. 4 Fig. 6

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IsolatorsSHS2/I: three-positions isolator with manualoperating mechanism with dependent operation.It is normally used for incoming/outgoing units(Fig. 3).

SHS2/IF: three-positions isolator with fuse-holderframe and earthing switch on the load side of thefuse-holder frame, both with manual operatingmechanism with dependent operation.It is normally used for metering units (Fig. 4).

SHS2/IB: three-positions isolator and spacedearthing switch, interlocked, both with manualoperating mechanism with dependent operation.It is normally used for incoming/outgoing unitswith fixed circuit-breakers (Fig. 5).

Earthing switchesSHS2/ES: earthing switch with manualoperating mechanism with dependent operation.It is normally used for incoming/outgoing units(Fig. 6).

Type U [kV] In [A] Icw [kA]

SHS2/ES 24.12 24 -- 12.5

SHS2/ES 24.16 24 -- 16

SHS2/ES 24.20 24 -- 20

Type U [kV] In [A] Icw [kA]

SHS2/I 24.04.12 24 400 12,5

SHS2/I 24.04.16 24 400 16

SHS2/I 24.06.16 24 630 16

SHS2/I 24.06.20 24 630 20

SHS2/IF 24.04.12 24 400 12,5

SHS2/IF 24.04.16 24 400 16

SHS2/IF 24.06.16 24 630 16

SHS2/IF 24.06.20 24 630 20

SHS2/IB 24.04.12 24 400 12,5

SHS2/IB 24.04.16 24 400 16

SHS2/IB 24.06.16 24 630 16

SHS2/IB 24.06.20 24 630 20

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Mix-L: three-positions switch-disconnector withmanual operating mechanism on exceeding deadcentre.It is normally used for 1L unit type according toDY803/1 and DY 803/116.

Mix-T: three-positions switch-disconnector withmanual stored energy operating mechanism,fuse-holder frame, release device for fuse blown,earthing switch on the load side of the fuse-holder frame.It is normally used for 1T unit type according toDY803/2 and DY 803/216.

Switch-disconnectors approved by Enel

Mix-U: three-positions switch-disconnector withmanual operating mechanism on exceeding deadcentre and spaced earthing switch.It is normally used for 1UT unit type according toDY803/3 and DY 803/316.

Mix-Lm: three-positions switch-disconnector withmotor operated mechanism on exceeding deadcentre.It is normally used for 1LE unit type according toDY803/4 and DY 803/416.

Switch-disconnectors approved by ENEL

Type Standardised unit table U [kV] In [A] Icw [kA]

Mix-L 24.04.12 DY 803/1 24 400 12.5

Mix-L 24.04.16 DY 803/116 24 400 16

Mix-T 24.04.12 DY 803/2 24 400 12.5

Mix-T 24.04.16 DY 803/216 24 400 16

Mix-U 24.04.12 DY 803/3 24 400 12.5

Mix-U 24.04.16 DY 803/316 24 400 16

Mix-Lm 24.04.12 DY 803/4 24 400 12.5

Mix-Lm 24.04.16 DY 803/416 24 400 16

TYPES AVAILABLE

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The SHS2 switch-disconnectors and isolators havebeen designed with a 230 mm pole centre dis-tance.As an example, the figure shows the dimensions ofthe SHS2/T1 type of switch-disconnector.For detailed information and other types of appara-tus, please contact us.

OVERALL DIMENSIONS

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The SHS2 switch-disconnectors and isolators havemechanical, electrical and layout characteristics idealfor constructing medium voltage metal-enclosed typeswitchboards for secondary distribution substations.They can be used in standard or arc-proof units.ABB is able to offer all the apparatus and componentsneeded to complete the switchboard units.Please contact us for further detailed information.

SWITCHBOARD APPLICATIONS

SHS2 switch-disconnector.Complete with fuse-holderframe and earthing switchon load side of the fuses.

HD4/R gas circuit-breakerTo construct units with a circuit-breaker, the HD4/R series SF6 gas-insulated medium voltage circuit-breaker with 230 mm pole centredistance is available, interchangeable with the VD4/R vacuum circuit-breaker.

PR521 switchboard protec-tion devices.These are provided on boardthe HD4/R and VD4/R circuit-breakers combined with currentsensors of dedicated type.

Fuses

Fuses according to DIN Standards areavailable to be combined with theSHS2 apparatus.

Exampleof unit withswitch-disconnectorand fuses.

SHS2 isolator.Complete with earthingswitch on load side of thecircuit-breaker.

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REF 542 Plus micro-processor-based unitThe REF542 Plus unit car-ries out integration of all thesecondary functions relativeto a switchboard unit.

PR512 Switchboard protection devicesThe PR512 are devices of the self-supplied type and ensure complete protection of theinstallation without an auxiliary power supply.

VD4/R vacuum circuit-breakerABB proposes the VD4/R seriesvacuum circuit-breaker, with 230 mmpole centre distance, interchangeablewith the HD4/R gas circuit-breaker.

Combined voltage-current sensorsA range of sensors is available whichoptimally covers the characteristics ofnew generations of instruments and of theREF 542 Plus unit in particular.The current sensors conform with the IEC60044-8 (CDV) Standard, the voltage sen-sors with the IEC 60044-7 Standard.Their dimensions are according to DIN42600 Standards.

Currenttransformers

The currenttransformers areof the resin insulated type.They comply with the IEC 60044-1Standards. Their dimensions arenormally according to DIN 42600Standards.

Ring core typecable transformersare also available.

Voltagetransformers

The voltagetransformersare of the resininsulated type.They comply with the IEC 60044-2Standards. Their dimensions are normallyaccording to DIN 42600 Standards.

Example ofunit withcircuit-breake r.

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(kV)

6FUSES

Three fuses for transformer protection can be con-nected in series with the SHS2 switch-disconnector, with dimensional characteristics com-plying with DIN 43625 Standards.The fuse striker must have force and run as shownin the diagram.Selection of the fuse according to the voltage andpower of the transformer must be made followingthe data indicated in the table.

F = Striker force.S = Striker run.

Table for selecting fuses for transformer protection

Rated power of the transformer (kVA)

Rated normal current of the fuse I N (A)

25 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600

3 10 16 25 25 40 40 63 63 100 100 100 100 160 – – – – –

5 6 10 16 16 25 25 40 40 63 63 100 100 100 100 160 – – –

6 6 6 10 10 16 16 25 25 25 40 40 63 63 100 100 160 – –

10 6 6 10 10 16 16 25 25 25 40 40 63 63 100 100 160 –

12 6 6 6 10 10 16 16 25 25 40 40 40 63 63 100 100 100 160

15 6 6 6 10 10 16 16 25 25 25 40 40 40 63 63 100 100 –

17.5 6 6 6 6 6 10 16 16 25 25 25 40 40 63 63 63 100 100

20 6 6 6 6 6 10 16 16 16 25 25 40 40 40 63 63 – –

24 6 6 6 6 6 6 10 16 16 16 25 25 40 40 40 63 63 –

Unnetwork

ABB Trasmissione & Distribuzione S.p.A.Unità Operativa Sace T.M.S.Via Friuli, 4I-24044 DalmineTel: +39 035 395111Fax: +39 035 395874E-mail: sacetms.tipm@it.abb.comInternet://www.abb.com

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