SHS2Gas-insulated switching and isolating apparatus

1

1

2

3

4

2

6

8

10

514

615

716

822

TYPES AVAILABLE

OVERALL DIMENSIONS

DESCRIPTION

OPERATING MECHANISMS

ACCESSORIES

FUSES

ELECTRICAL DIAGRAMS

SWITCHGEAR APPLICATIONS

2

1

2

3

4 2 2 2

5 6

7 7 7897

DESCRIPTION

GeneralThe SHS2 switching and isolating apparatus consist of gas-insulatedswitch-disconnectors and isolators, suitable for use in medium voltagemetal-enclosed switchgear.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 housing, 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 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 IEC62265-1 and CEI 17-4 and with the IEC 62271-102 and CEI EN 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 cables or of the busbars.

1 Moving contact operatingshaft

2 Top insulator3 Upper fixed contact4 Gas exhaust valve5 Stainless steel

housing6 Operating mechanism7 Bottom insulator8 Moving contact9 Earth contact

3

1

CLOSED OPEN EARTHED

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

The stainless steel housing providesa 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.

4

Compliance with Standards

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

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

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

Switch-disconnector • IEC 62271-105combined with fuses • CEI EN 60420

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 62271-102• CEI 17.4Isolators and earthing switches with alternating current andvoltage higher than 1000 V.

• IEC 60265-1• CEI 17-9/1Control circuit-breakers and switch-disconnectors for highvoltage.Part 1: Control circuit-breakers and switch-disconnectorsfor rated voltages higher than 1 kV and lower than 52 kV.

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

5

1

Electrical characteristics

Test laboratoryComplies with the UNI CEIEN/ISO/IEC 17025Standards, accredited by anexternal independentorganisation.

Quality System

Complies with the ISO 9001Standards, certified by an ex-ternal independent organisa-tion.

EnvironmentalManagement SystemComplies with the ISO 14001Standards, certified by an ex-ternal independent organisa-tion.

Switch-disconnector

IEC 60265-1

Isolator

IEC 62271-102

Earthing switch

IEC 62271-102

FeederEarthing Switch

Unit withoutfuses

Unit withfuses

FeederEarthing Switch

(SHS2 ES)

24

400-630

50/60

31.5-40-50

31.5-40-50

12.5-16-20

400-630

4...16

25

50

400

T1-T1M-T2

Test Duties1-2-3-4-

5-6-7

E3

IEC 60694

-

-

-

31.5-40-50

-

12.5-16-20

-

-

-

-

-

T1-T1M-T2

-

E1

-

kV

A

Hz

kAp

kAp

kA

A

A

A

A

A

°C

kVp

kVp

kVrms/1 min

kVrms/1 min

-

-

-

N.A.

2,5

1

-

-

-

-

-

T2

-

E1

-

24

400-630

50/60

-

-

12.5-16-20

-

-

-

-

-

T3

-

-

IEC 60694

-

-

-

-

-

12.5-16-20

-

-

-

-

-

T3

-

E0

-

-

-

-

N.A.

-

1

-

-

-

-

-

T3

-

E0

-

-

-

-

N.A.

-

12.5-16-20

-

-

-

-

-

T4

-

E0

-

M1

(BIL 1.2/50 �sec)

125

145

50

60

Rated voltage

Rated Normal Current (40°C)

Frequency

Rated making capacity on short-circuit

Without external earthing switch

With external earthing switch (*)

Rated short time withstandcurrent - 1s (*)

Rated breaking capacity

Mainly resistive load service

No-load transformer service

No-load line service

No-load cable service

Ring circuit service

Operating Mechanism

Test parameters for making capacity,breaking capacity and making capacityunder short circuit - rms (IEC 60265-1)

Electrical life

Maximum overtemperature test under normal load

Mechanical life

Atmospheric impulse withstand voltage

Phase-Phase towards earth

Between open contacts

Withstand voltage at industrial frequency

Phase-Phase towards earth

Between open contacts

M1

(BIL 1.2/50 �sec)

125

145

50

60

M1

(BIL 1.2/50 �sec)

125

145

50

60

Unit withoutfuses

Unit withfuses

(*) For different values contact ABB.

6

1

2

3

4

1

2

3

4

5

7

5

7

6

6

8

8

OPERATING MECHANISMS

GeneralThe switch-disconnectors use T1-T1M and T2type operating mechanisms with separateoperating seats for the isolation and earthingoperations.The isolators use T3 and T4 type operatingmechanisms with a single operating seat.With T1-T2-T3 and T4 operating mechanisms, theopening and closing operations are carried outlocally manually by means of an operating leverprovided with them.For the T2 operating mechanism, it is alsopossible to carry out the remote openingoperation by means of a special shunt openingrelease.With the T1M motor operator, the closing andopening operations are carried out remotely.However, in case of emergency, they can also becarried out locally manually by means of theoperating lever provided or electrically by meansof the special pushbuttons.The normal power supply voltages for the T1Mmotor operator are:– 24-48-110-220 VDC;– 48-110-220 VAC 50-60Hz.

Switch-disconnector operatingseat

Earthing switch operating seat

Interlocking lever between switch-disconnector and earthing switch

Mechanical position indicators ofthe mimic diagram

Voltage indicator lamps(on request)

Key locks on switch-disconnectoroperation (on request)

Key locks on earthing switchoperation (on request)

Opening and closing pushbuttonsSHS2/T1M - SHS2/T1M/N)

SHS2/T1M switch-disconnector operating mechanism.

T1-T1M Operating mechanism with independ-ent operation on exceeding deadcentre

This enables rapid either manual or motor-operated closing and opening of the switch-disconnector with operating speed independentof the operator, obtained by using a single spring.Closing or opening takes place by charging theabove-mentioned spring (manually or by motor)until it exceeds dead centre.It also carries out rapid manual closing of theearthing switch with operating speedindependent of the operator.It is used in SHS2/T1, SHS2/T1N, SHS2/T1M andSHS2/T1M/N type switch-disconnectors.

7

2

1

2

3

4

3

2

4

1

55

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 (only forSHS2/T2F - SHS2/T2F/N).

It also carries out rapid manual closing of theearthing switch with operating speedindependent of the operator.It is used in SHS2/T2, SHS2/T2/N, SHS2/T2F andSHS2/T2F/N type switch-disconnectors.

T3 Operating mechanisms with dependentoperation

These allow manual closing of the isolator andearthing switch with operation speed dependenton the operator.Closing and opening are obtained by working onthe operating lever. The lever can only beremoved after completion of the operation.The T3 type operating mechanism is used in theSHS2/I, SHS2/I/N, SHS2/IF and SHS2/IB typeisolators.

T4 Operating mechanisms with independentoperation

These allow manual closing of the earthingswitch with operating speed independent of theoperator.The opening and closing operations are carriedout locally manually by means of an operatinglever provided. The lever can only be removedafter completion of the operation.The type T4 operating mechanism is used in theSHS2/ES type earthing switch.

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).

8

ACCESSORIES

1 Key locksThese allow theapparatus to be lockedin the closed or openposition. It is possibleto combine a maximumof four key locks for theT1, T2 and T4 (Two asmax.) operatingmechanisms, and amaximum of three keylocks for T3 operatingmechanisms.If a key lock with freekey on earthing switchin open position isrequired, it iscompulsory to requireT1 operatingmechanism (not motoroperated) instead of T3operating mechanism.If key locks are notrequested, a pre-assembled extensionis supplied whichallows the use ofpadlocks to lock theoperations.

Type of isolator Sw

itch-

disc

onne

ctor

-isol

ator

key

lock

s

Ear

thin

g sw

itch

key

lock

s

Shu

nt o

peni

ng re

leas

e

Mic

rosw

itch

for i

ndic

atio

n of

fuse

blo

wn

Aux

iliar

y co

ntac

ts

Doo

r loc

k

Bus

-sid

e vo

ltage

indi

cato

rla

mps

Cab

le-s

ide

volta

ge in

dica

tor

lam

ps

Insu

lato

r cro

sspi

ece

with

or

with

out c

apac

itive

div

ider

s

Spa

ced

eart

hing

sw

itch

Fus

e ad

apte

rs

Operatingmechanism

SHS2/T1

SHS2/T1/N

SHS2/T1M

SHS2/T1M/N

SHS2/T2F

SHS2/T2F/N

SHS2/T2

SHS2/T2/N

SHS2/IF

SHS2/I

SHS2/I/N

SHS2/IB

SHS2/ES

T1

T2

T1-T3

T4

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

–

–

–

–

C

C

C

C

–

–

–

–

–

–

–

–

–

ABB

ABB

–

–

–

–

–

–

–

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

–

ABB

–

ABB

–

ABB

–

ABB

–

ABB

–

–

–

–

C

C

–

–

C

–

–

–

–

C Assembly by thecustomer.

ABB Assembly by ABB.Accessory alwayssupplied.

– Not available.

Optional accessories

SHS2 - T4 operating mechanism: SHS2/ES1 free key earthing switch open1 free key earthing switch open + 1 free key earthing switch closed1 free key earthing switch closed2 free keys earthing switches closed

SHS2 - T1 and T2 SHS2/T1 - SHS2/T1/N - SHS2/T1M - SHS2/T1M/N -operating mechanism: SHS2/T2 - SHS2/T2/N - SHS2/T2F - SHS2/T2F/N

Line-side isolator operation Earthing switch operation1 free key IMS open 1 free key ST open1 free key IMS closed 1 free key ST closed1 free key IMS open + 1 free key IMS closed 1 free key ST open + 1 free key ST closed2 free keys IMS open 2 free keys ST open2 free keys IMS closed 2 free keys ST closed

SHS2 - T3 operating mechanism: SHS2/IB (*)

1 free key isolator open1 free key isolator open + 1 free key ST closed1 free key earthing switch closed2 free keys earthing switches closed

SHS2/I - SHS2/I/N - SHS2/IF

1 free key isolator closed1 free key isolator open

1 free key isolator open1 free key earthing switch closed

1 free key earthing switch closed

2 free keys earthing switches closed

1 free key isolator closed1 free key isolator open

1 free key isolator closed1 free key isolator open1 free key earthing switch closed

1 free key isolator closed1 free key earthing switch closed

1 free key earthing switch closed2 free keys earthing switches closedIMS Switch-disconnector

ST Earthing switch(*) A key interlock, with

the key free with theline-side isolatorclosed, is alwayssupplied as acompulsoryapplication.

9

3

2 Auxiliary contactsThese signal the position of theapparatus state. A maximum of twomake plus + two break contacts canbe combined for each position(closed/open/earthed).For the T2 operating mechanism, aposition contact of line-side isolatorclosed is lost (1NO + 1NC) if theshunt opening release is requested.

3 Shunt opening release (onlyT2 operating mechanism:SHS2/T2, SHS2/T2/F)

This is an electromechanical devicewhich, following energisation of anelectromagnet, activates the releaselever of the operating mechanismmaking the switch-disconnectoropen.Power supply voltages:– 24 - 48 - 110 - 220 V d.c.– 24 - 48 - 110 - 220 V a.c. 50-60HZ

4 Voltage indicator lampsThese can be supplied with one ortwo sets of three lamps integrated inthe operating mechanism casing.The device is preset with sockets forchecking phase concordance.It can be combined with thecrosspiece with capacitiveinsulators.

5 Crosspiece with insulatorsThis can be supplied to completethe switchgear in the versions withpole insulators or, alternatively, withpole capacitive insulators.Should voltage indicator lamps berequested on the cable side, it isnecessary to install a crosspiecewith capacitive insulators.

6 Door lockThis is a mechanical device whichdoes not allow the unit door to beopened with the earthing switchopen.

7 Earthing switchThis is fitted with:– transmission;– interlock;– auxiliary contacts: two make plus

two break contacts.The spaced earthing switch isstandard for: SHS2/T2F, SHS2/T2F/N,SHS2/IF, SHS2/ES, SHS2/IB.The spaced earthing switch isavailable on request for: SHS2/T1,SHS2/T1M, SHS2/T2, SHS2/I, SHS2/T1M/N, SHS2/I/N, SHS2/T2/N, SHS2/T1/N.

8 Contact signalling fuse blownWhen a fuse blows, special kinemat-ics activate a signalling contact.

9 Adapters for fusesThe kit includes all the accessoriesneeded to adapt and mount threefuses according to DIN Standardswith dimension “e” less than 442 mm.Different adapters are available for292 mm and 192 mm fuses.

10 Field diffusersThe kit includes three field diffusers tobe applied to the end of the busbarsin correspondence with theswitchgear closure sheet. The kit isoptional and assembly is by thecustomer.The kit must be used, for insulationreasons, in 375 mm units (should theswitchgear manufacturer not providealternative solutions).This solution is already used in ABBUniMix switchgear and application ofthe kit requires a busbar cross-sectionsimilar to that of the UniMixswitchgear.For further information, please consultthe SHS2 switch-disconnectorinstallation manual.

10

Fig. 1 - UniMix P3

TYPES AVAILABLE

Switch-disconnectorsSHS2/T1, SHS2/T1/N: three-position switch-disconnector with manual operating mechanismon exceeding dead centre.It is normally used for incoming/outgoing units.(Fig. 1).

SHS2/T2, SHS2/T2/N: three-position switch-disconnector with manual stored energy operat-ing mechanism. It is normally used for incoming/outgoing units and can be fitted with a shuntopening release. (Fig. 1).

SHS2/T2F, SHS2/T2F/N: three position switch-disconnector with manual stored energy operat-ing mechanism, fuse-holder frame, releasedevice for fuse blown, and earthing switch on theload side of the fuse-holder frame.It is normally used to make transformerprotection units and can be fitted with a shuntopening release(Fig. 2).

SHS2/T1M, SHS2/T1M/N: three-position switch-disconnector with motor operator.It is normally used to make incoming/outgoingunits (Fig. 1).

IsolatorsSHS2/I, SHS2/I/N: three-position line-side isolatorwith manual operating mechanism with depend-ent operation.It is normally used for incoming/outgoing units(Fig. 3).

SHS2/IF: three-position line-side isolator withfuse-holder frame and earthing switch on the loadside of the fuse-holder frame, both with manualoperating mechanism with dependent operation.It is normally used for measurement units (Fig. 4).

SHS2/IB: three-position line-side isolator andspaced earthing switch, interlocked, with manualoperating mechanism with dependent operation.It is normally used for incoming/outgoing unitswith fixed circuit-breakers (Fig. 5).The spaced earthing switch can be assembled toallow the use of fixed circuit-breakers withcurrent sensors on board (standard version), orcan be assembled for use of current transformersaccording to DIN Standards, installed inswitchgear.

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

11

4

Fig. 2 - UniMix P2 Fig. 3 - UniMix ASR Fig. 4 - UniMix M Fig. 5 - UniMix P1F Fig. 6 - UniMix A

12

TYPES AVAILABLE

SHS2/T1 24.04.12 TN10572 24 400 12.5 500 P3SHS2/T1 24.04.16 TN10572 24 400 16 500 P3SHS2/T1 24.06.16 TN10572 24 630 16 500 P3SHS2/T1 24.06.20 TN10572 24 630 20 500 P3SHS2/T1/N 24.04.12 TN10620 24 400 12.5 375 P3SHS2/T1/N 24.04.16 TN10620 24 400 16 375 P3SHS2/T1/N 24.06.16 TN10620 24 630 16 375 P3SHS2/T1/N 24.06.20 TN10620 24 630 20 375 P3SHS2/T2 24.04.12 TN10581 24 400 12.5 500 P3SHS2/T2 24.04.16 TN10581 24 400 16 500 P3SHS2/T2 24.06.16 TN10581 24 630 16 500 P3SHS2/T2 24.06.20 TN10581 24 630 20 500 P3SHS2/T2/N 24.04.12 TN10622 24 400 12.5 375 P3SHS2/T2/N 24.04.16 TN10622 24 400 16 375 P3SHS2/T2/N 24.06.16 TN10622 24 630 16 375 P3SHS2/T2/N 24.06.20 TN10622 24 630 20 375 P3SHS2/T2F 24.04.12 TN10573 24 400 12.5 500 P2SHS2/T2F 24.04.16 TN10573 24 400 16 500 P2SHS2/T2F 24.06.16 TN10573 24 630 16 500 P2SHS2/T2F 24.06.20 TN10573 24 630 20 500 P2SHS2/T2F/N 24.04.12 TN10623 24 400 12.5 375 P2SHS2/T2F/N 24.04.16 TN10623 24 400 16 375 P2SHS2/T2F/N 24.06.16 TN10623 24 630 16 375 P2SHS2/T2F/N 24.06.20 TN10623 24 630 20 375 P2SHS2/T1M 24.04.12 TN10580 24 400 12.5 500 P3SHS2/T1M 24.04.16 TN10580 24 400 16 500 P3SHS2/T1M 24.06.16 TN10580 24 630 16 500 P3SHS2/T1M 24.06.20 TN10580 24 630 20 500 P3SHS2/T1M/N 24.04.12 TN10621 24 400 12.5 375 P3SHS2/T1M/N 24.04.16 TN10621 24 630 16 375 P3SHS2/T1M/N 24.06.16 TN10621 24 630 16 375 P3SHS2/T1M/N 24.06.20 TN10621 24 630 20 375 P3SHS2/I 24.04.12 TN10574 24 400 12.5 500 ASRSHS2/I 24.04.16 TN10574 24 400 16 500 ASRSHS2/I 24.06.16 TN10574 24 630 16 500 ASRSHS2/I 24.06.20 TN10574 24 630 20 500 ASRSHS2/I/N 24.04.12 TN10624 24 400 12.5 500 ASRSHS2/I/N 24.04.16 TN10624 24 400 16 500 ASRSHS2/I/N 24.06.16 TN10624 24 630 16 500 ASRSHS2/I/N 24.06.20 TN10624 24 630 20 500 ASRSHS2/IF 24.04.12 TN10578 24 400 12.5 500 MSHS2/IF 24.04.16 TN10578 24 400 16 500 MSHS2/IF 24.06.16 TN10578 24 630 16 500 MSHS2/IF 24.06.20 TN10578 24 630 20 500 MSHS2/IB 24.04.12 TN10579 24 400 12.5 750 P1FSHS2/IB 24.04.16 TN10579 24 400 16 750 P1FSHS2/IB 24.06.16 TN10579 24 630 16 750 P1FSHS2/IB 24.06.20 TN10579 24 630 20 750 P1FSHS2/IB 24.04.12+kit 2CT TN10579 24 400 12.5 750 P1FSHS2/IB 24.04.16+kit 2CT TN10579 24 400 16 750 P1FSHS2/IB 24.06.16+kit 2CT TN10579 24 630 16 750 P1FSHS2/IB 24.06.20+kit 2CT TN10579 24 630 20 750 P1FSHS2/IB 24.04.12+kit 3CT TN10579 24 400 12.5 750 P1FSHS2/IB 24.04.16+kit 3CT TN10579 24 400 16 750 P1FSHS2/IB 24.06.16+kit 3CT TN10579 24 630 16 750 P1FSHS2/IB 24.06.20+kit 3CT TN10579 24 630 20 750 P1FSHS2/ES 24.12 TN10577 24 — 12.5 500 ASHS2/ES 24.16 TN10577 24 — 16 500 ASHS2/ES 24.20 TN10577 24 — 20 500 A

Type Dimens. U [kV] In [A] Icw [kA] Width UnitUnit UniMix

13

4

MIX - LMMIX - UMIX - T

IMS-ST1

ST2

IMS-ST1

ST2

MIX - L

IMS-ST

Mix-L 24.04.12 DY 803/1 24 400 12.5Mix-L 24.04.16 DY 803/116 24 400 16Mix-T 24.04.12 DY 803/2 24 400 12.5Mix-T 24.04.16 DY 803/216 24 400 16Mix-U 24.04.12 DY 803/3 24 400 12.5Mix-U 24.04.16 DY 803/316 24 400 16Mix-Lm 24.04.12 DY 803/4 24 400 12.5Mix-Lm 24.04.16 DY 803/416 24 400 16

Mix-L: three-position switch-disconnector withmanual operating mechanism on exceedingdead centre, with operation independent of theoperator .It is normally used to make 1L type unitsaccording to DY803/1 and DY 803/116.

Mix-T: three-position switch-disconnector withmanual stored energy operating mechanism,with operation independent of the operator,fuse-holder frame, release device for fuseblown, earthing switch on the load side of thefuse-holder frame.It is normally used to make 1T type unitsaccording to DY803/2 and DY 803/216.

Mix-U: three-position switch-disconnector withmanual operating mechanism on exceedingdead centre and spaced earthing switch, bothwith operation independent of the operator.

Switch-disconnectors approved by Enel (They can be ordered ony as a complete panel infixed configuration with the accessories indicated below).

It is normally used to make 1UT type unitsaccording to DY803/3 and DY 803/316.

Mix-Lm: three-position switch-disconnector withmotor operator (24 Vdc. auxiliary voltage) onexceeding dead centre.It is normally used to make 1LE type unitsaccording to DY803/4 and DY 803/416.

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

14

5OVERALL DIMENSIONS

SHS2 for units 375 mm wide

SHS2 for units 500 mm wide

The SHS2 switch-disconnectors and isolators have been designed with a230 mm pole centre distance. As an example, the figure shows thedimensions of the SHS2/T1 type of switch-disconnector. The overalldimensions of the different apparatus are available on request.For detailed information and other types of apparatus, please contact us.

15

60

10 20 30 40 S(mm)

F (N)

50

20

40

10

30

(kV)

6

25 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500

3 10 16 25 25 40 40 40 63 63 63 80 100 100 160 200 200 – – – –

5 6 10 16 16 25 25 25 40 40 63 63 63 80 100 100 160 200 200 – –

6 6 6 16 10 16 25 25 40 40 40 63 63 63 80 100 100 160 200 200 –

10 6 6 10 10 16 16 16 25 25 25 40 40 63 63 63 80 100 100 160 200

12 6 6 10 10 10 16 16 16 25 25 25 40 40 63 63 63 80 100 160 160

15 6 6 10 10 10 16 16 16 16 25 25 25 40 40 63 63 63 100 100 125

20 6 6 10 6 6 10 16 16 16 16 25 25 25 40 40 63 63 63 63 100

24 6 6 10 6 6 10 10 16 16 16 16 25 25 25 40 40 63 63 63 80

Table for selecting fuses for transformer protection (*)

FUSES

the type of laminations used (hotlaminated or with orientatedcrystals).There is the maximum connectioncurrent when circuit-breaker closingtakes place corresponding to thevoltage passing through zero.A further result to be guaranteed isprotection against faults in the lowvoltage winding and in the stretch ofthe connection from this to thecircuit-breaker positioned on thesecondary, avoiding the use of fuseswith rated current which is too high,in order to ensure tripping within ashort time even under these faultconditions.A rapid check of the short-circuit current at thesecondary terminals of the transformer and on thesupply side of the circuit-breaker on the secondary- if placed at a significant distance, allows the triptime to be verified on the fuse blowing curve.The usage table given below takes both therequired conditions into account, i.e. sufficientlyhigh rated current to avoid untimely fuse blowingduring the no-load connection stage and, in anycase, of a value which guarantees protection ofthe machine against faults on the low voltage side.

(*) ABB CEF type fuses. Increases in the rated normal current of the fuses must be foreseen in the case of transformer overload or in the case ofambient temperature higher than 40 °C.

F = Striker force.S = Striker run.

Rated power of the transformer (kVA)

Rated normal current of the fuse IN (A)

Unrete

Three fuses for transformer protection can beconnected in series with the SHS2 switch-disconnector, with dimensional characteristicscomplying with DIN 43625 Standards.The fuse striker must have the force and runshown in the diagram.Selection of the fuse according to the voltage andpower of the transformer must be made inconformity with the data indicated in the table.

Transformer protection and selection offusesWhen the isolators are used to control andprotect transformers, they are fitted with aparticular type of current-limiting fuses whichguarantee selectivity with other protectiondevices and can take the high transformerconnection currents without deteriorating.In this case, protection against overcurrents onthe medium voltage side of the transformer is notindispensable since this task is carried out by theprotection provided on the low voltage side.The protection on the medium voltage side canbe entrusted just to the fuse, which must beselected taking into account the no-loadconnection current, which can take on valuesequal to or higher than 10 times the rated currentaccording to the power of the transformer and to

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ELECTRICAL DIAGRAMS

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7

Diagrams of the applicationsThe diagram (No. 401762) shows the SHS2switch-disconnector circuits.

To take evolution of the product into account, it is,in any case, always useful to refer to the circuitdiagram provided with each circuit-breaker.

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ELECTRICAL DIAGRAMS

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20

ELECTRICAL DIAGRAMS

-F1…-F3 = Medium Voltage Fuses-KC = Auxiliary relay for switch-

disconnector closing-KO = Auxiliary relay for switch-

disconnector opening-KD = Auxiliary relay with two contacts

delayed on attraction and twoinstantaneous contacts

-MM = Motor for switch-disconnectoroperation

-MO = Shunt opening release (see noteC)

-PGN = Lamp for signalling switch-disconnector open

-PRD = Lamp for signalling switch-disconnector closed

-PUD1 = Voltage indicator on the line-PUD2 = Voltage indicator on the busbars-Q80 = Earthing switch-Q90 = Switch-disconnector-RR1…2 = Transient suppressors-S75F = Contact for signalling Medium

Voltage fuse intervention-SC = Pushbutton for local closing of

the switch-disconnector-SO = Pushbutton for local opening of

the switch-disconnector-TR1…2 = Rectifier-X = Interface connector with the

feeder (outside the unit)-X1,…, -X3 = Terminal box of the operating

mechanism applications

State of operation shownThe diagram is shown under the followingconditions:– switch-disconnector open– earthing switch open– circuits de-energised.

Caption= Number of figure of the diagram

A1 = Applications of the operatingmechanism of the switch-disconnector

A4 = Applications of the switchgear(indicative apparatus andconnections for operatingmechanism and signals)

AK = Auxiliary circuit card of theswitch-disconnector

-B80/1…2 = Position contact of the earthingswitch

-B80/L = Position contact open during themanual operation of the earthingswitch -Q80

-B80-90/1…2 = Position contact open duringmanual operation of the earthingswitch -Q80 and during manualoperation of the switch-disconnector -Q90

-B90/1…3 = Position contacts of the switch-disconnector

-B90/C = Position contact open a switch-disconnector closed

-B90/E = Contact activated by the key lock-B90/L = Position contact open during

manual operation of the switch-disconnector Q90

-B90/O = Position contact open withswitch-disconnector open

-C1/L1...L3 = Capacitive dividers located onphases L1, L2, L3 of the line

-C2/L1...L3 = Capacitive dividers located onphases L1, L2, L3 of the busbars

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MM

U

NoteA) The switch-disconnector is only fitted with the

applications specified in the order confirmation.To make out the order, please consult thecatalogue of the apparatus.

B) In application of the IEC 757 and CEI 16-6Standards, the colours are identified with thefollowing codes:– Blue = BU– Yellow = YE– Black = BK– Red = RD– Green-Yellow = GNYE.

C) When fig. 9 is required, contact –B90/2 of fig. 10is not available.

D) When Medium Voltage Fuses are required, figs.1, 2, 3, 4 and 5 are not available.

Graphic symbols for electrical diagrams (IEC 60617 and CEI 3-14 ... 3-26 Standards)

Delayedmovement

Mechanical interlockbetween two pieces ofapparatus

Rotary handleoperatingmechanism

Pushbuttonoperatingmechanism

Electric motoroperator

Earth (generalsymbol)

Three conductors

Connection ofconductors

Socket and plug(female andmale)

Resistordepending onthe voltage,varistor

Motor (generalsymbol)

Rectifier withtwo half-waves(with bridge)

Make contact

Break contact

Closing positioncontact(limit switch)

Opening positioncontact(limit switch)

Isolator

Switch-disconnector withdouble breaking

Control coil(general symbol)

Control coil of arelaywith delay onattraction

Lamp (generalsymbol)

Capacitive divider

Description of the figuresFig. 1 = Switch-disconnector operating mecha-

nism circuit (24 V d.c.).Fig. 2 = Switch-disconnector operating

mechanism circuit (48-110 V d.c. -110 Va.c.).

Fig. 3 = Switch-disconnector operatingmechanism circuit (220 V d.c. -220 Va.c.).

Fig. 9 = Circuit of the shunt opening release(see note C).

Fig. 10 = Auxiliary contacts of the isolators (seenote C).

Fig. 11 = Contact signalling fuse intervention.Fig. 12 = Consent contact for the operating

mechanism circuit activated by the keylock.

Fig. 17 = Circuit for signalling voltage present onthe line.

Fig. 18 = Circuit for signalling voltage present onthe busbars.

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

SWITCHGEAR APPLICATIONS

SHS2 switch-disconnector.Complete with fuse-holder frame and earthingswitch on load side of thefuses.

Circuit-breakersBoth the HD4/R series SF6 gasinsulated medium voltage circuit-breaker and the VD4/R vacuumcircuit-breaker, with right lateral

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

Fuses

Fuses according to DIN Standardsare available to be combined with theSHS2 apparatus.

Example ofunit 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 carriesout integration of all the sec-ondary functions relative toa switchgear unit.

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

operating mechanism and 230mm pole centre distance, areavailable to make units with acircuit-breaker.

Combined voltage-current sensors

A range of sensorsis available whichoptimally covers thecharacteristics ofnew generationsof instrumentsand of the REF 542 Plus unit in particular.The current sensors conform with theIEC 60044-8 (CDV) Standard, the voltagesensors with the IEC 60044-7 Standard.Their dimensions are according toDIN 42600 Standards.

Currenttransformers

The currenttransformersare of the resininsulated type.They comply withthe IEC 60044-1 Standards.Their dimensions are normally accordingto DIN 42600 Standards.

Toroidal cabletype transformersare also available.

Voltagetransformers

The voltagetransformersare of the resininsulated type.They comply withthe IEC 60044-2 Standards.Their dimensions are normally accordingto DIN 42600 Standards.

Example ofunit withcircuit-breaker.

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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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