3ah3 import

Operating Instruction Siemens 3AH3 / 3AH3

Vacuum Circuit-Breaker 3AH37.2kV to 36kV

3AH37.2kV 36kV

Operating Instructions/ Order-No:/ : 3ZX1812-0AH30-0AN1/9229 9860 174-SLC PTD MC

All right reserved / © S iemens AG 1996 & SLC PTD MC 2001


Central legend

13. Checking marking15. Pole plate16.1 Upper post insulator16.2 Lower post insulator19. Pole assembly, complete20. Upper interrupter support27. Upper terminal28. Strut28.1 Centering piece29. Lower terminal29.1 Flexible connector29.2 Clamp30. Vacuum interrupter31. Fixed contact piece31.1 Connection surface32. Insulator33. Arcing chamber34. Metal bellows35. Guide36. Moving contact piece36.1 Drive and terminal bolt40. Lower interrupter support48. Insulating operate rod48.6 Angled lever49. Contact pressure spring50. Hand crank50.1 Opening for fitting hand crank50.2 (Charging) gearing50.4 Motor M1 M150.4.1Position switch50.5 Hand crank coupling50.6 Adapter for hand crank51. Rating plate51.1 Opening for rating plate53. ″Close″pushbutton53.1 Closing solenoid Y9 Y954. ″Open″pushbutton54.1 Shunt release Y1 Y154.2 Shunt release Y2 Y154.3 Current transformer- operated release Y4 Y454.4 Undervoltage release Y7

Y7

55. ″Closing spring charged″ indicator

″ ″

55.1. Opening for indicator ″Closing spring charged″

″ ″

58. Operating cycle counter58.1 Opening for operating-cycle counter

59. ON-OFF indicator59.1 Opening for ″closed/open″ indicator60. Mechanism housing60.1 Cover60.2 Transport hole60.3 Crane hook symbol61. Dashpot62. Closing spring63. Breaker shaft64. Opening spring66. Closing damper68. Auxiliary switch S1

(6NO+6NC)S1

(6 +6 )68.0.1.Extended auxiliary switch S1 (12NO+12NC)

S1(12 +12 )

68.1 Operating rod (forauxiliary switch S1)

(S1)

68.7.1 Low voltage plug connector X0 (64- pole)

64 X0

69. Contactor70. Earthing bolt M1290. Mechanical interlocking


Contents PageGeneral 1/1Technical data 1/2~1/9

Type designation 1/2Rating plate 1/2Standards and specification 1/3Ambient temperature/humidityloadability 1/3Site altitude 1/4Electrical data 1/5Operating times 1/6Switching duties 1/6Motor operating mechanism 1/6Auxiliary switch 1/7Low-voltage plug connector 1/7Shunt closing release 1/7Shunt release 1/7~1/8Undervoltage release 1/8CT-operated release 1/8Breaker tripping signal, cut-outSwitches (S6 and S7) 1/9Varistor module (V1 to V3) 1/9Electrical local closing/Electrical interlocking 1/9Mechanical interlocking 1/9Dimensions and weights 1/9

Description 2/1~2/5Construction 2/1~2/3Vacuum interrupters 2/4Complement 2/5

Installation 3/1~3/4Installing in cubicle or on truck 3/1Flat bar connection 3/1~3/2Control leads 3/2Earthing 3/2Circuit documents 3/2Function schematic diagram 3/3~3/4

Operation 4/1~4/2Commissioning 4/1~4/2Charging and closing spring 4/2Closing 4/2Tripping 4/2

Maintenance 5/1~5/5Safety measures 5/1Servicing 5/1Cleaning 5/1Abnormal operating conditions 5/2Checking the contact systems 5/3Checking the vacuum 5/3Service life 5/4Accessories and spare parts 5/5

Note: The items illustrated in the Figures areenumerated in the fold–out centrallegend.

When ordering the operating instructions pleasequote the order No.3ZX1812-0AH30-0AN1/92299860 174 - SLC PTD MC.

1/11/2~1/91/21/21/3

,1/31/41/51/61/61/61/71/71/71/7~1/81/81/8

(S6 S7) 1/9 (V1 V3) 1/9/

1/91/91/9

2/1~2/52/1~2/32/42/5

3/1~3/4 3/1

3/1~3/23/23/23/23/3~3/4

4/1~4/24/1~4/24/24/24/2

5/1~5/55/15/15/15/25/35/35/45/5

: .

3ZX1812-0AH30-0AN1/9229 9860 174 - SLC PTD MC.


! WARNING

This equipment contains hazardous voltages and mechanical parts which move at high speed and may be controlled remotely.

Non-observance of the safety instructions can result in severe personal injury or property damage.

Only qualified personnel should work on or around this equipment after becoming thoroughly familiar with all warnings, safety notices, and maintenance procedu- res contained herein.

The successful and safe operation of this equipment is dependent on proper handling, installation, operation and maintenance.

General:Siemens 3AH3 vacuum circuit-breakers (V-breaker) are of the triple-pole indoor type for ratedvoltages between 7.2 and 36kV.

The vacuum circuit-breaker consists of themechanism housing complete with stored-energymechanism and control elements, the three poleswith vacuum interrupters, cast-resin insulators andoperating rods.

The mounting position (relative to the vacuuminterrupters) is vertical. The vacuum circuit-breaker can be used in practically any systemdesign.

Under normal operating conditions, the vacuumcircuit-breaker is maintenance free.

!

, .

.

, .

, , .

:3AH3 ,

7.2kV 36kV.

, , ,

.

( ). .

, .

- 1/1 -


Technical dataType designation3AH3 vacuum circuit-breakers are identified by amachine-readable product designation made up of aseries of figures and letters.

3 A H 3 1 1 7 - 7

(See catalog HG11 for selection and ordering data ofthe respective circuit-breaker)

Rating plate

The rating plate which can be read in the operatingposition, contains the following information:1 Manufacturer 7 Rated short-circuit

duration2 Type designation 8 Weight3 Serial number 9 Rated operation

sequence4 Design code 10 Rated frequency5 Year of manufacture 11 Rated lightning impulse6 Rated normal current withstand voltage

12 Rated short-circuitbreaking current

13 Rated voltage

Fig.1/1Rating plate

Note: in the event of any queries state the typedesignation(2), designation code(4) and the serialnumber(3).

3AH3.

Basic type

Rated voltage

Rated short circuit breaking current

Rated normal current

( 11)

, :

1 7

2 8 3 9

4 105 116

12

13

.1/1

: (2), (4),(3).

- 1/2 -

503150

3117-7 2Y 3117-7

3150

2Y

50

O- O-


Standard specificationsThe 3AH3 vacuum circuit-breaker comply with thestandards of IEC 56, IEC 694, BS 5311 and DIN VDE0670. The V-breakers 3AH3 for 15kV rated voltagemeet the requirements of the American standardsANSI C37 with respect to their insulating capacity.

Ambient temperature/humidity and loadabilityThe 3AH3 V-breakers are designed for the normaloperating conditions laid down in the standards.Permissible ambient temperatures:

Maximum value =+40°CAverage over a period of 24 hours =+35°CMinimum value = -5°CPermissible atmospheric humidity:Relative humidity, 24 hours mean <95%Relative humidity, 1month mean <90%

Under these conditions condensation may occasionallyoccur. The rated normal currents listed in Fig. 1/4 werelaid down for 40°C ambience in accordance with DINVDE/IEC. Use under conditions other than normal ispossible with certain measures that can be implemen-ted on request.

The maximum permissible load current as a function ofthe 3AH3 V-breaker ambient temperature has beenplotted in Fig.1/2. The load currents indicated apply toopen-type switchgear. Metal-enclosed switchgear mustbe derated as specified by switchgear manufacturer.

Determination of the load characteristic number

Rated normal current load characteristic number

1250A 22000A 42500A 53150A 64000A 7

3AH3 IEC 56, IEC 694, BS5311 DIN VDE 0670 , 15kV

ANSI C37 .

,3AH3

.

=+40°C24 =+35°C

= -5°C:

24 <95%1 <90%

, . 1/4 DINVDE/IEC 40°C .

.

3AH3 , 1. .

, ,.

-1/3 -

Load current A

Fig.1/2 Maximum permissible load current as a function of theswitch ambient temperature

. 1/2

Ambient temperature °C


Site AltitudeThe rated insulating capacity values (rated impulsewithstand voltage, rated power frequency withstandvoltage) 1) specified for the equipment are, in accord-ance with the provisions if VDE Standard 0111 and IECPublication 71, based on standard atmosphericconditions (1013 h Pa, 20 ºC, and 11g/m3 watercontent ).i.e. sea lever. The insulating capacity of aninsulation in air decreases with increasing altitude as aresult of change in the air density, Standards prom-ulgated by VDE, IEC and other disregard this decreasein insulating capacity for altitude of up to 1000m, i.e.the decrease of approximately 9% at this altitude is stillpermissible.

The standards provide no guideline for altitudes ofmore than 1000 m with respect to insulation ratings;they leave this up to an agreement between manufa-cture and user.

Our own recommendation is as follows:Since this method used for rating insulation up toaltitudes of 1000 m has proved to be satisfactory, itshould also be applied to higher altitudes. The altitudecorrection factor a should therefore be based on theinsulating capacity at 1000m, which is lower by 9%(corresponding to 0.91 or 1/1.1) than the capacity atsea level.The following expression thus applies for the selectionof the equipment:

Rated withstand voltage to be selected 2)Required rated withstand voltage 2)

> (1.1xa)Example:Site altitude above sea level 3000 mRequired rated impulse withstand voltage 95kV(For a 15kV system according to ANSI)Correction factor a 0,73(According to Fig. 1/3)Rated impulse withstand voltage to be selected:

95kV1.1x0.73

=118kV

Switchgear with a rated voltage of 24kV, List2 (ratedlightning impulse withstand voltage of 125kV) meet thisrequirement.The actual insulating capacity at the site is thenwithstand voltage 3) = a* rated withstand voltage 2)of the selected switchgear unit.

The following definitions apply:1) Rated withstand voltage2)=require value corresponding to the provision of DIN ,VDE,IEC for sea level. Withstand voltage 3)= actual value for the given altitude2) Rated lightning impulse withstand voltage Rated power frequency withstand voltage3) Lightning impulse withstand voltage Power frequency withstand voltage

( ,

) 1) VDE 0111 IEC-71( 1013 h Pa, 20 °C 11g/m 3)

, ., , .

1000m, 9%, ,VDE,IEC .

1000m, .

, :1000m

, . a 1000m ,9%( 0.91 1/1.1).

:

2) 2)

> (1.1xa):

3000 m95kV

( 15kV ANSI )a 0.73

( 1/3):

95kV1.1x0.73

=118kV

24kV, 2( 125 kV).

3)=a* 2)

.1/3Relationship between the correction factor a and thesite altitude.

a .

:1) 2)= DIN,VDE,IEC 3 )= . 2)

3)

-1/4 -

Correction factor/

Altitude of site above sea level/


Electrical data3AH3 vacuum circuit-breaker 3AH3

±¬U

(kV)

UW

(kV)

®Us

(kV)

¯ISC

(kA)

°tth

(s)

1250A 2000A 2500A 3150A 4000A

²Ima

(kA)

³D.C.

(%)

´PA

(mm)

µ (11)

50 3 � 125 36 210 EU 3AH3 057-2*

� EU 3AH3 057-6*

� EU 3AH3 057-7*

63 3 � 160 36 275 EU 3AH3 078-2*

� EU 3AH3 078-6*

� EU 3AH3 078-7*

7.2 60 20

� EU 3AH3 078-8*

50 3 � 125 36 210 EU 3AH3 117-2

� EU 3AH3 117-6

� EU 3AH3 117-7

63 3 � 160 36 275 EU 3AH3 128-2**

� EU 3AH3 128-6**

� EU 3AH3 128-7**

12 75 28

� EU 3AH3 128-8**

50 3 � 125 36 210 EU 3AH3 167-2**

� EU 3AH3 167-6**

� EU 3AH3 167-7**

63 3 � 160 36 275 EU 3AH3 178-2**

� EU 3AH3 178-6**

� EU 3AH3 178-7**

15 95 36

� EU 3AH3 178-8**

50 3 � 125 36 210 EU 3AH3 217-2**

� EU 3AH3 217-6**

� EU 3AH3 217-7**

63 3 � 160 36 275 EU 3AH3 228-2**

� EU 3AH3 228-6**

� EU 3AH3 228-7**

17.5 95 38

� EU 3AH3 228-8**

24 125 50 40 3 � 100 36 275 EU 3AH3 266-6

31.5 3 � 80 36 350 EK 3AH3 305-2***

� EK 3AH3 305-4***

� EK 3AH3 305-6***

40 3 � 100 36 350 EU 3AH3 306-6***

36 170 70

* Us up to 32kV on request; ** Us up to 42 kV on request * 32 kV; ** 42kV*** Us up to 85kV on request; Uw up to 185 kV on request *** 85 kV; 185kV

Note: � available1. Rated voltage (maximum permissible system voltage) at 50 to

60Hz.2. Rated lightning impulse withstand voltage (peak value)3. Rated power frequency withstand voltage (RMS value)4. Rated short-circuit current5. Rated short-circuit duration6. Type designation7. Rated normal current8. Rated short-circuit making current9. DC component of rated short-circuit breaking current10. Pole center distance11. Switching duties U= Rapid load transfer

K= rapid auto-reclosure +UE= electrical operating energy

Fig.1/4 electrical data for 3AH3 vacuum circuit-breaker

: � 1. ( ) 50-60Hz

2. ( )3. ( )4. 5. 6. 7. 8. 9. 10. 11. U=

K= +UE=

.1/4 3AH3

- 1/5 -


Operating times

Closing time/Spring charging time/ Opening time/ Shunt release/ (Y1) Supplementary release 3AX11/ (Y2,Y4,Y7) 3AX11

Arcing time/Break time/ Shunt release/ (Y1) Supplementary release 3AX11/ (Y2,Y4,Y7) 3AX11

Dead time/Close-open-time/ Shunt release/ (Y1) Supplementary release 3AX11/ (Y2,Y4,Y7) 3AX11

Minimum pulse duration/

″Close″/″ ″ Closing solenoid/ (Y9) ″Trip″ / ″ ″ Shunt release/ (Y1) ″Trip″ / ″ ″ Supplementary release 3AX11 (Y2,Y4,Y7) 3AX11

Shortest pulse duration of breaker tripping signal for 1st shunt release /Shortest pulse duration of breaker tripping signal for 2nd and 3rd shunt release/2 3

mss

msms

msmsms

msmsms

msmsms

msms

<80<15<65<45

<15<80<60

300<90<70

454020

>15>10

Fig.1/5 operating times/ .1/5

Closing time = the interval of time between the initiation ofthe closing operation and the instant when the contactstouch in all poles.Opening time = the interval of time between the initiation ofthe opening operation and the instant when the contactsseparate in all poles.Arc time = the interval of time between the instant of thefirst initiation of an arc and the instant of final arc extinctionin all poles.Breaking time = the interval of time between the beginningof the opening time of a circuit breaker and the end of thearcing time.Close-open-time = the interval of time (in a make-breakoperation cycle) between the instant when the contactstouch in the first pole in the closing process, and the instantwhen the arcing contacts separate in all poles in thesubsequent opening processSwitching dutiesThe operating mechanisms of the 3AH3 circuit-breakers aresuitable for rapid auto-reclosure. Breakers for a rated short-circuit breaking current of 40kA are, at rated data levels,suitable for rapid load transfer; up to 31.5kA they can alsobe used for rapid auto-reclosure.Motor operating mechanismThe maximum DC power input is 500 W (approx.) themaximum AC power input is 650VA (approx.). During partof the short spring charging time the motor operate in theoverload range. The recommended rating for motionprotection devices are shown in Fig.1/6 (the protectiondevices are not supplied with the vacuum breakers andmust be ordered separately)

*) MCB assembly TYPE 8RL54 or MCB with G characteristicFig.1/6 Rated currents of motor protection device.The supply voltage may deviate from the rated value by-15% to +10%.

=.

= .

= .

= .

- = .

3AH3 .40kA ; 31.5kA

500W. 650VA..

.1/6 .(, )

*) 8RL74, G

*) 8RL54 G.1/6

-15% +10% . - 1/6 -

Rated supply voltage DC24V DC48V DC60V DC/AC 110V50/60HZ

DC220V/AC230V50/60HZ

Recommended rating of protection device**

8A 6A 4A 2A 1.6A


Auxiliary switch (S1) 3SV92 (S1) 3SV92Two versions of the auxiliary switch can be supplied.The standard version is fitted with 6 NO contacts and6 NC contacts. The extended version is fitted with12NO contacts and 12NC contracts.

Rated insulation voltage: AC/DC 250 VInsulation class: C acc. to DIN VDE 0110Current: 10AMaking capacity: 50A

.6 6 . 12 12 .

: AC/DC 250V: C DIN VDE 0110

: 10A: 50A

Breaking capacity/ AC 40 to 60 Hz/ 40~60Hz DC/

Operational current/I (A)

Voltage

U (V)

Operational current

I (A)

Voltage

U (V) Resistive load/ Inductive load/(T=20ms)

<230V 10 244860110220

101095

2.5

109742

Fig.1/7 Breaking capacity of 3SV92 auxiliary switch.1/7 3SV92

Low-voltage plug connector (X0)

The control elements of the 3AH3 vacuum circuit-breaker provided in the mechanism housing are wiredfor external connection to the plug connector(X0). Thestandard version is provided with a 64-pole plugconnector.

Shunt closing release (Y9) 3AY1510The closing solenoid unlatches the charged closingspring and thus closes the circuit-breaker electricallyIt is available for both AC and DC operation. Aftercompletion of a closing operation, the closing solenoidis de-energized internally.

Power consumption approx. 100 W/VA

(X0)

3AH3(X0), 64 .

(Y9) 3AY1510,

. , , .

100 W/VA

Shunt releases (shunt opening releases)The shunt releases are used for automatic tripping ofcircuit-breakers by means of appropriate protectiverelays and for deliberate tripping by other electricalmeans. They are designed for connection to externalvoltage (DC or AC voltage). In special cases, fordeliberate tripping, they can also be connected to avoltage transformer.

Shunt releases based on two different operatingprinciples are used.

Shunt release (Y1) 3AY1510The 3AY1510 shunt release is used as standard in thebasic circuit-breaker version, with this design, theelectrically supplied tripping pulse is passed to the″open″ latching mechanism by means of a direct-actionsolenoid armature and the circuit-breaker is thusopened.

Power consumption approx. 100 W/VA

( )

,. ,

,

(Y1) 3AY15103AY1510 .

" " , .

100 W/VA - 1/7 -


Shunt release (Y2) 3AX1101 1)

The 3AX1101 shunt release is fitted if more than oneshunt release is required. With its design, the electricalopening command is transferred in boosted form to the″Open″ latching mechanism via a solenoid armaturethrough unlatching of a energy store and thus thecircuit-breaker is opened.Power consumption: <60W or <55VAUndervoltage release (Y7) 3AX1103 1)

Undervoltage release consist of a stored-energymechanism, an unlatching mechanism and anelectromagnet system which is connected continuouslyto the supply when the circuit-breaker is in the closestate. If this voltage drops to below a certain value theunlatching mechanism is released and opening of thecircuit-breaker is thus initiated via the stored-energymechanism.

The deliberate tripping of undervoltage releasegenerally takes place via an NC contact in the trippingcircuit. But it can also be carried out via an NO contactby short-circuiting of the magnet coil. With this type oftripping, the short-circuit current is limited by the built-inresistors (see circuit diagram Fig.3/4)

Under voltage releases can also be connected tovoltage transformers. When the operating voltagedrops to impermissibly low levels, the circuit-breaker istripped automatically.Power consumption: <6.5 W or <7.5 VACT-Operated release (Y4) 3AX1102 1)

CT-operated releases consist of a stored-energymechanism, an unlatching mechanism and anelectromagnet system. When the tripping current isexceeded (90% of the CT-operated release ratedcurrent) the unlatching device of the stored-energymechanism is released and thus opening of the circuit-breaker is initiated. In addition to the primary currenttransformer, matching transformers are required forapplication of the CT-operated releases.Power consumption for 0.5A and 1A<6VA at 90% ofthe rated current and with open armature.

CT-operated release (Y6) 3AX11041)(Low-energy release 0.1Ws)

In connection with a solid-state release (7SJ41overcurrent time protection or similar) and low-powerprimary current transformers (window-typetransformers), it is possible with the 3AX1104 to createa CT-operated release without additional supplyvoltage.

The 3AX1104 is of similar design as the 3AX1101/1102 releases. With its coil data and its low energyrequirement of < 0.1Ws, its designend to be directlyactuated by a release impulse provided by a capacitorof the above-mentioned electronic release systems.

1) Can be ordered on request, retrofitting possible.

(Y2) 3AX1101 1).

, 3AX1101 ., ,

, .

: <60W <55VA (Y7) 3AX1103 1)

, , ,

. , , .

.

, (4/3)

, , .

: <6.5 W <7.5 VA (Y4) 3AX1102 1)

, .

90% , ,. ,

.

0.5A 1A , 90%, , <6VA

(Y6) 3AX11041)( 0.1Ws)

( 7SJ41 )( ) ,

3AX1104.

3AX1104 3AX1101/3AX1102. <0.1Ws ,

.

1) , . - 1/8 -


Breaker tripping signal, cut-out switches (S6and S7)

When the vacuum circuit-breaker is tripped by meansof a release, the position switch S6 briefly makescontact. This contact making can be used forsignalling. In the event of intentional mechanicaltripping, the cut-out switch S7 breaks this contact.

Varistor module (V1 to V3) 3AX1526 1)The disconnection of inductive loads in DC circuits maycause switching overvoltage which pose a risk toelectronic control units. In order to prevent this, theinductances of the circuit-breaker mechanism andcontrol (motor, closing solenoid, shunt release andauxiliary contactor) can be connected to varistor (withDC operation). For rated operating voltage of 60V to220V DC the varistor module 3AX1526 is available asan accessory; it limits the overvoltage to about 500V.The module contains 2 separate varistor circuits.

Electrical local closing/electrical interlocking1)

In the basic version, the closing spring must bereleased mechanically if the breaker is to be closedlocally. A version with electrical local closing can alsobe supplied. In this version, the making circuit of thecircuit-breaker is activated electrically via a push-button. In this way, allowance can also be made forstation-specific interlocks, and undesired makingoperations prevented. For example, interlocking of thecircuit-breaker is possible via the auxiliary contact of adisconnector.Circuit-breaker with electrical local closing cannot beclosed mechanical.

Mechanical interlocking1)Operating mechanism of disconnectors can be fittedwith a mechanical switchgear interlocking facility. Thedisconnector and the associated circuit-breaker are inthis case interlocked mechanically.The sensing parts check the switch position of thecircuit-breaker and prevent if from closing mechanicallyand electrically if the associated disconnector is not ina position to allow safe operation. On the other hand,the disconnector is prevented from being operatedwhen the circuit-breaker is closed.

The mechanical interlocking facility can also be used tointerlock breaker trucks or draw-out breaker parts.

Adjustment instruction: 3G 460 00127 (3AX 1520-3C)

Dimensions and weightThe dimensions and weights of the vacuum circuit-breaker are shown in the relevant drawings.

For planning purposes, the drawings showing detailedoverall dimensions, can be ordered through theappropriate Siemens agency.

The weight is also stated on the breaker rating plate.

1) Can be ordered on request, retrofitting possible.

S6 S7

, S6, . ,

S7 .

(V1 to V3) 3AX1526 1)

. , ( , ,

( ). 3AX152660V-220V;

500V ..

/ 1)

, , . .

.

. ,

.

.

1).

.

, ,

, . , , .

.

: 3G 460 00127 (3AX 1520-3C)

.

, .

.1) , . - 1/9 -


DescriptionConstructionThe vacuum circuit-breaker consists of the mechanismhousing (60.), the 3-pole assemblies (19.) with vacuuminterrupter (30.), cast-resin post insulators (16.1and16.2), struts (28.) and of the operating rods (48.) withcontact pressure springs (49).

Each of three pole assemblies (19.) is supported bytwo cast-resin post insulators (16.1and 16.2), which arebolted to the pole plate (15) respectively.

The main feature of the 3AH3 vacuum circuit-breakerare shown in Fig.2/1.

The mechanism housing (60.) accommodates allelectrical and mechanical elements required foropening and closing the vacuum circuit-breaker. Fig.2/2 shows the arrangement of the individual modules inthe mechanism housing.

The mechanism housing has a detachable cover60.1(Fig.2/3).This cover (60.1) has cutouts for the actuating andindicating devices.The vacuum circuit-breaker is closed by means of thepushbutton (53.). The motor (50.4) immediatelyrecharges the closing spring (62.). In the event ofmotor power supply failure, the closing spring can becharged by means of a hand crank (50.). The coverincludes an opening (50.1) for the hand crank, behindwhich the hand crank coupling (50.5) of the gearing(50.2) is located. The stored-energy mechanism stateis shown by the indicator (55.). The indicator (59.)shows the breaker state (ON-OFF). The operatingcycle counter (58.) indicates the number of chargingoperations. The rating plate (51.) is attached to themechanism housing but visible through an opening(51.1) in the cover.The movement is transmitted to the pole assembliesvia moulded-plastic operating rods (48.).

(60.), 3 (19.) (30.), (16.1 16.2),

(28.) (49) (48.).

(19.) (16.116.2) ,

(15).

3AH3 2/1.

(60.) . .2/2 .

60.1( .2/3).

(60.1) .

(53.) . (50.4) (62.) . ,

(50.) . (50.1), (50.2)

(50.5). (55.) . (59.) ( - ).

(58.) . (51.) (51.1) .

(48.) .

- 2/1 -

Fig.2/1 3AH3 vacuum circuit-breaker.2/1 3AH3


Fig. 2/2 View of an open mechanism housing. 2/2

Fig. 2/3 Actuating and indicating devices. 2/3

- 2/2 -

Tightening torque:10Nm: 10Nm


The pole assembly (19.) consists of the upperinterrupter support (20.) with the upper terminal (27.),the vacuum interrupter (30.), the lower interruptersupport (40.) with the lower terminal (29.), the clamp(29.2) with the flexible connector (29.1) and angledlever (48.6). The centering piece (28.1) and the struts(28.) relieve the vacuum interrupters of external forcessee (Fig. 2/4).

Fig. 2/4 3AH3 pole assembly. 2/4 3AH3

(19.) (30.) (27.), (29.) , (29.1) (29.2) (48.6).

(28.1) (28.) ( .2/4).

- 2/3 -


Vacuum interrupters

The basic construction of the vacuum interrupters forthe 3AH3 vacuum circuit-breaker is shown in thesectional view in Fig.2/5.

Depending on its type, the vacuum interrupter (30.) isfixed to the upper interrupter support (20.). The arcingchamber (33.) is located between two ceramic insulator(32.). The fixed contact piece (31.) is connecteddirectly with the housing. The moving contact piece(36.) is fixed to the terminal bolt (36.1) and is locatedcentrally in the guide (35.). The metal bellows (34.)forms the vacuum-proof connection to the interrupterhousing.

Fig.2/5 vacuum interrupter. 2/5

The vacuum interrupters fitted in the 3AH3 vacuumcircuit-breaker are type-approved in accordance withthe X-ray regulations of the Federal Republic ofGermany. They conform to the requirements of the X-ray regulations of January 8, 1987 (Federal LAW

Gazette Page 144) § 8 and annex section 5 up torated short-time AC voltage stipulated in accordancewith DIN VDE/IEC.

3AH3 2/6.

, (30) ( )(20.) . (33.)

. (31.) . (36.) (36.1) (35.)

(34.) .

3AH3 ,X . (

144 ) 5 8 DIN VDE/IECX .

- 2/4 -


Complement

The basic version of the vacuum circuit-breakercomprises:

Electrical operating mechanism (charging motor)With mechanical and electricalanti-pumping feature (M1)Closing solenoid (Y9)Shunt release (Y1)Low-voltage plug connector, 64-pole (X0)with grommet sleeve housingAuxiliary switch 6NO+6NC (S1)Position switch for signaling"Closing spring charged" (S41, S42)Breaker tripping signal, cut-out switch (S6, S7)Operating cycle counter

Each 3AH3 vacuum circuit-breaker can be equippedwith the following supplementary devices:

Terminal block (X0)Extended auxiliary switch 12NO+12NC (S1)Shunt release 3AX1101 (Y2)Current transformer-operated release 3AX1102

(Y4, Y5)Current transformer-operated release 3AX1104(0.1Ws)

(Y6)Undervoltage release 3AX1103 (Y7)Electrical manual closing (S14, S15)Mechanical interlock

In addition to the standard shunt release Y1, the 3AH3vacuum circuit-breaker can be fitted with a maximum oftwo release of type 3AX 11

The permissible combination of supplementaryequipment and special versions are stated in catalogueHG 11.

:

( )

(M1) (Y9)1 (Y1)64 (X0)

6 +6 (S1)

" " (S41, S42)(S6, S7)

3AH3 :

(X0) 12 +12 (S1)

2 3AX1101 (Y2) 3AX1102

(Y4, Y5) 3AX1104(0.1Ws)

(Y6) 3AX1103 (Y7)

(S14, S15)

Y1 , 3AH33AX 11.

HG 11.

- 2/5 -


InstallationInstalling in cubicle or on truckThe 3AH3 vacuum circuit-breaker are supplied in theopen state with the ″closing spring discharged″indication (55.) visible. Before installing the 3AH3 V-breaker, remove the transport device (skids andspacers). Mount face loose supplied phase barrier inaccordance with the supplied drawings.

Before installing the 3AH3 vacuum circuit-breaker in acubicle or a truck check its rating plate data (to avoidconfusion) and compare the rated voltage indicated inthe delivery papers with the power supply voltageavailable at the site.

On the vacuum circuit-breaker with undervoltagerelease (Y7) 3AX1103, the arresting screw of thehammer must be moved from position A to B (seeannex to operating instructions for release or note cardin mechanism housing [60.] of vacuum circuit-breaker).

On the pole plate (15.) and on the mechanism housing(60.) there are a total of 14 fixing holes – to suit thevarious types of installation (Fig.3/1). For installation ofvacuum circuit breakers with rated short circuitbreaking current > 50kA we recommend to only thepole plate.

Use M12 fixing bolts - strength class 8 – makingreference to the mandatory dimension drawings.

The rack or frame must be adapted to the operatingconditions and have adequate load bearing capacityand stability.

Flat bar connectionPrior to fitting the conductors fix them so as to ensuresmooth contact with their connecting parts and with theholes in full alignment.

Rub the contact faces to be bolted together with criss-crossing strokes using a wire brush until bright metalshows and wipe then with a clean rag.

Note! Copper-sprayed and spray silver-plated surfacesshould be cleaned a rag and not brushed.

3AH ″″ (55.). 3AH3 ,

( ).

, ( )

.

(Y7) 3AX1103 ,A B (

(60.) ).

(15.) (60.) 14 – ( .3/1). 50

kA .

M1 - 8 - .

.

.

, .

.

! . - 3/1 -

View Y/ Y

View Z/ Z Fig.3/1 Means of fixing 3AH3 vacuum circuit-breaker.3/1 3AH3

* Holes for M12 bolts* M12


Differing contact materials (AL/CU) must not be workedwith the same cleaning tool. Thinly grease the brightcontact faces with acid-free Vaseline (e.g. ShellVaseline 8420) or equivalent anti-corrosion agent andbolt them together immediately 1).

Note:Silver-plated parts must not be bolted together withaluminium bars.Use the appropriate M12 nuts and bolts of strengthclass 8 and corresponding spring elements and plainwashers.

Note! When tightening the terminal screws, counteractthe torque (70Nm~7mkp) by resisting it with a suitablespanner or socket wrench.

Control leadsVacuum circuit-breaker of standard design areprovided with a 64-pole low-voltage plug connector X0(68.7.1). The corresponding plug for externalconnection is designed for crimp connection of controlleads with a nominal section area of 1.5mm2. Use onlycrimping tools (e.g. Harting crimp tongs 09 99 000 0110 with positioning sleeve 09 99 000 0111) 2).

Make reference to the circuit diagram supplied.

Earthing

Connect the vacuum circuit-breaker to the appropriatehigh voltage protective earth by means of the suitablemarked M12 (70.)(see Fig.3/3) terminal on the top ofthe mechanism housing (60.) using flat copper, coppercable or hot galvanized steel strip (DIN VDE 0141/7.76Item 5.3).

If the V-breaker with the mechanism housing areinstalled in an earth metal rack so that firm electricalcontact is established, the mechanism housing neednot be earthed separately. When installing the switchexternally, toothed serrated washers (DIN 6789) mustthen be placed under the bolt heads.

Circuit documentsThe wiring and connection of circuit-breaker is shownin the circuit diagram supplied, depending on theparticular model and complement.

Typical circuit diagram for circuit-breaker are shown inFig. 3/3 and 3/5.1) Shell–Vaseline 8420, Deutsche Shell – AG Abt.

VSM Überseering 35, 22 297 Hamburg Postfach 60 05 552) Harting Crimpzange, Harting Elektronic GmbH.

Marienwerder stra♣e3, D-32339 Espelkamp P.O.Box 11 40.

( / ) , ( Shell 8420)

, 1).

:.

8 M12 ,.

! , ,70Nm~7mkp.

64 X0 (68.7.1). 1.5mm2

, . (Harting 09 99 000 0110 09 99000 0111) 2).

.

(60.)M12 (70.)( .3/3)

, (DIN VDE 0141/7.76 5.3).

, . ( DIN

6789).

,.

. 3/3 3/5.

- 3/2 -

70Fig.3/2 .3/2


Function schematic diagram

HA Manual tripping/HE Manual closing/K1 Anti-pumping contactor

M1 Motor operating mechanism/P Energy store/R1 Resistor/S1 Auxiliary switch/S21, S22 Position switches (cut-out motor after

charging) ( )

S3 Position switches(open when closing spring charged )

( )S41, S42 Position switch (signals charged state)

( )S6, S7 Position switches (for switch tripped signal)

( )X0 Low-voltage plug connector

Y1 1st shunt release/Y2 2nd shunt release/Y4, Y5, Y6 CT operated release/Y7 Undervoltage release/

Y9 Closing solenoid/ S10, S11 Position switches (mech. pumping prevention)

( )

- 3/3 -

Fig.3/3 V circuit-breaker 3AH3 with manual and electrical closing with 64-way plug connector

.3/3 , 64 3AH3

Motor drive Closing and anti-pumping device

1st shuntrelease

Switchtripping signal

closing spring charged signal

System wiring

Tripping via NCcontact

Tripping viaNC contact

Breaker wiring

System wiring

Release "off" " "

-Y6 -Y5 -Y7

⇑

⇑

⇑

⇑

Fig.3/4 typical circuit for connection of the undervoltage release Y7.3/4 Y7


Function schematic diagram

-Y6 -Y5

- 3/4 -

Motor drive Closing and anti-pumping device

1st shuntrelease

Switchtripping signal

Closing spring charged signal1st CT operatedrelease

Electricalmanualclosing

Fig.3/5 V circuit-breaker 3AH3 with electrical manual closing with64-way plug connector

Example for extended fitting with Y4 and varistor circuit for DC.3/5 64 3AH3

Y4

HA Manual tripping/HE Manual closing/K1 Anti-pumping contactor

M1 Motor operating mechanism/P Energy store/R1 Resistor/S1 Auxiliary switch/S21, S22 Position switches (cut-out motor after charging)

( )S3 Position switches

(open when closing spring charged ) ( )

S41, S42 Position switches (signals charged state) ( )

S6, S7 Position switches (for switch tripped signal) ( )

X0 Low-voltage plug connector

Y1 1st shunt release/Y2 2nd shunt release/

Y7 Y4, Y5, Y6CT operated release/Y9 Y7 Undervoltage release/

Y9 Closing solenoid/S10, S11 Position switches (mech. pumping prevention)

( )

With this model, the auxiliary switch terminals are wired to the plug connector as illustrated

Auxiliary switch standard Auxiliary switch extended

Wiring not applicable ifB Y2 (2nd shunt release) fittedE Y7 (undervoltage release) fitted

B 2 Y2E Y7

Release "off""

Extended auxiliary switch

⇑

⇑

D7 B3 B8 C5 D8 D9 B9 C9

-Y7


! DANGER

High voltage! Touching of live will result in death or severe personal injury.

This equipment shall be operated only by qualified personnel after becoming thoroughly familiar with the respective instruction manual and in particular all safety instructions.

! WARNING

This equipment contains hazardous voltages and mechanical parts which move at high speed and may be control remotely.

Non-observance of the safety instructions can result in severe personal injury or property damage.

In particular: Do not remove the cover (60.1). Do not reach inside any openings in the operating mechanism. Dot not touch pole assemblies(19.) and operating rods (48.).

Commissioning

Prior to commissioning, check the V-breaker in accordancewith the following points:

1. Clean them as applicable (for details refer to ″cleaning″page 5/1.).

2. Check all fixing and terminal screws for tightness.3. Examine the circuit-breaker for any external damage,

especially to the control leads, post insulatorsand interrupters.

! CAUTION

The V-breaker may be operated only with the original hand crank (50.), in order to avoid injures as a result of the motor suddenly starting up.

4. Charge the closing spring (62.) with the hand crank (50.)(see Fig.4/1), press the ″close″ push-button (53.) andafter closing, trip the breaker by pressing the ″open″push-button (54.).

On the 3AH3 V-breaker with undervoltage release (Y7) 3AX1103, the arresting screw of the hammer

must be moved from position A to B (see note card inmechanism housing [60.] of 3AH3 vacuum circuit-breaker)

!

! .

.

!

, .

.

: (60.1). . (19.) (48.).

:

1. ( ″ ″ 5/1.).

2. .3. , ,

.

!

, (50.).

4. (50.) (62.) ( .4/1), ″ ″ (53.), , ″ ″ (54.) .

(Y7) 3AX1103 3AH3 , A B ( 3AH3

).

- 4/1 -


5. For test operations with the motor mechanism switch onthe supply voltage. The motor will start immediately andcharge the closing spring (62.). check the mechanicaland electrical indication of the charging state of theclosing spring. Actuate the mechanism as indicatedunder 4. And check the mechanical and electrical stateindication.

6. Check the auxiliary switch S1 (68.) and position switches(50.4.1) electrically in both end positions by actuating the3AH3 vacuum circuit-breaker.

7. Also check-by electrical actuation – the function of theclosing solenoid Y9 (53.1) and all fitted shunt release.

When correct functioning of the 3AH3 V-breaker has beenascertained it can be put into service.

Charging the closing springWhen the supply voltage is applied the motor (50.4)automatically charges the closing spring (62.). Shouldthe supply fail the closing spring (62.) can also be charged byhand crank (50.). In the lattercase, as shown in Fig.4/1,thehand crank(50.) is inserted with the forwards pushed adapter(50.6) through the opening (50.1) onto hand crank coupling(50.5) and turned clockwise, until the symbol "closing springdischarged shown in the indicator opening (55.3) ischanged to "closing spring charged (Fig. 4/2).

The adapter (50.6) is designed so that the hand crank (50.) isdecoupled on the recovery of the motor supply.

Closing

If operation is not blocked by the mechanical interlock, pressthe ∀close∀ push-button (53.) or the corresponding controlswitch until the 3AH3 vacuum circuit-breaker closes and bothindicates and signals this state.

After closing (and, if applicable, releasing of the ∀close∀push-button (53.) the closing spring (62.) is immediately and automatically recharged the "closing spring charged (55.)and indication becomes visible once again.

Tripping

The opening spring (64.) is charged during closing.

To trip the breaker press the ∀open∀ push-button (54.) orcorresponding control switch until the V-breaker trips andboth indicates and signals this state.

5. , (62.) . . 4 , .

6. 3AH3 , S1 (68.) (50.4.1) .

7. Y9 (53.1) .

3AH3 , .

, (50.4) (62.) ., (50.) . ,

.4/1 , (50) (50.6) (50.1) (50.5) , (55.3)

( .4/2).

(50.6) .

, ″ ″ (53.)3AH3

.

(∀ ∀ (53.) ), (62.),

(55.).

(64.) .

(54.) .

- 4/2 -

Fig.4/1 Charging the closing spring with the hand crank 4/1

Fig.4/2 ∀∀Closing spring discharged∀∀″″ Fig.4/2 ∀∀Closing spring charged∀∀

″″


Maintenance

Safety measure

! DANGER

Maintenance, repair and subsequent conver- sion work may be carried out only by specially trained personnel in accordance with the operating instructions and/or special conversions instructions. Training and information sessions for personnel can be provided by the competent Siemens department before starting any work on V-breakers, reference must be made to the local safety regulations for high-voltage switchgear, e.g. the five safety rules (DIN VDE 0105/07.83 Part 1, Item 9). Switch off the power supply and then close and open the V-breaker by hand ( V-breaker in open state "closing spring discharged" indication visible).

Non-observation can result in death, severe personal injure or substantial property damage.

!

, .

, , (DIN VDE 0105/07.83 9 , 1 ). ( " " ).

.

Servicing

Under normal operating conditions, the 3AH3 vacuumcircuit-breaker is maintenance-free. We recommendnonetheless a regular visual inspection.

CleaningTo ensure the insulating capacity, it is necessary thatthe insulating components are clean. Insulatingcomponents and external breaker parts must be wipedwith a damp cloth. Use only warm water with theaddition of a mild liquid household detergent ascleaning agent.

! WARNING

Windings and terminals must not be touched if the power supply has not been disconnect- ed. Non-observance can result in death or serious personnel injury.

! CAUTION

All springs of the operating mechanism must be relaxed and the vacuum circuit-breaker be brought into the open state, "closing spring discharged" indication visible. Non-observance can result in personnel injury.

, 3AH3 , .

. ..

.

!

, .

!

, , " " .

.

- 5/1 -


Abnormal conditions

If the 3AH3 vacuum circuit-breaker is used inabnormally unfavourable indoor conditions (e.g.frequent heavy condensation, dust-ridden air etc).We recommend regular cleaning of the breakerexternal components and, if necessary, renewal of theanti-corrosion protection. Only the following productsmay be used for the respective working parts of theVCB.

Bearing, sliding surface:Isoflex Topas L32Klber- Lubrication KGGeisenhausener Stra♣e 7Postfach 70 10 4781379 MunichFederal Republic of Germany

Bearings inaccessible to grease and bearings of theauxiliary switch S1:SHELL Tellus Oil 32SHELL Oil trade company GmbHZitadellenstra♣e 5P.O.Box 90091521079 HumburgFederal Republic of Germany

Joints and bearings which cannot be dismantled mustnot be treated with a cleaning agent prior toreapplication of anti-corrosives.

After renewal of the anti-corrosion protection, severalmechanical test-switching operations should beperformed on the vacuum circuit-breaker.

Lubricants (for special conditions) are available fromthe Siemens agent responsible:

Order No180 g Klber-Isoflex Topas L32 3AX1133-3Aand 50 g SHELL Tellus Oil 32

180 g Klber-Isoflex Topas L32 3AX1133-3H

50 g SHELL Tellus Oil 32 3AX1133-2G

1kg SHELL Tellus Oil 32 3AX1133-2D

1kg Klber-Isoflex Topas L32 3AX1133-3E

3AH3 ,( ).

, . .

, :Isoflex Topas L32Klber- Lubrication KGGeisenhausener Stra♣e 7Postfach 70 10 4781379 MunichFederal Republic of Germany

S1 :

SHELL Tellus Oil 32SHELL Oil trade company GmbHZitadellenstra♣e 5P.O.Box 90091521079 HumburgFederal Republic of Germany

.

, .

( ) :

180 g Klber-Isoflex Topas L32 3AX1133-3Aand 50 g SHELL Tellus Oil 32

180 g Klber-Isoflex Topas L32 3AX1133-3H

50 g SHELL Tellus Oil 32 3AX1133-2G

1kg SHELL Tellus Oil 32 3AX1133-2D

1kg Klber-Isoflex Topas L32 3AX1133-3E

- 5/2 -


Checking the contact systemThe contact system is subject to wear both by contacterosion and by compression of the contact pieces andthe guide bolts. To check the contact wear, the movingterminal bolt (36.1) of the vacuum interrupter (30.) isprovided with the checking marking (13.9) Fig. 5/1. Aslong as the marking is wholly or partially visible whenthe 3AH3 vacuum circuit breaker is closed, theshortening of the contacts is within permissible range.

Checking the vacuum

Such a check should be made if there is any risk of aninterrupter having developed a leak. Busbar and cableconnections must be split. The check is performed withan HV test unit. If necessary, further information maybe obtained from the appropriate Siemens RegionalOffice.

., (30.) (13.9) ( . 5/1).

, .

, . . .

.

- 5/3 -

Fig.5/1 Check mark


Service life of vacuum interrupter

The maximum permissible number of mechanicaloperating cycles is 10,000. The permissible number ofoperating cycles as a function of the breaking current isshown in Fig.5/2. When this permissible maximum hasbeen attained, the interrupters or the complete poleassemblies must be renewed. Detailed instructions aresupplied with the replacement interrupters/poleassemblies.

When ordering replacement interrupters or poleassemblies, state the circuit-breaker type, design codeand serial number (see name plate)

10,000 . .5/2.

, / .

/ , , ( ).

Fig.5/2 Permissible number of operating cycle as a function of breaking current Ia5/2 Ia

- 5/4 -

Determination of the load characteristic number/

Load characteristic number at rated normal currentRated voltage

kV

Rated short-circuit breaking current

kA 1250A 2000A 2500A 3150A 4000A50 1 - 1 1 -7.263 2 - 2 2 250 1 1 1 -1263 2 2 2 250 1 - 1 1 -1563 2 - 2 2 250 1 - 1 1 -17.563 2 - 2 2 -40 - - 3 -24

31.5 4 4 4 - -3640 5 5 5 -

Num

ber

of b

reak

ing

oper

atio

ns/

Num

ber

of b

reak

ing

oper

atio

ns/

Breaking current I (kA)/ (kA) Breaking current I (kA)/ (kA)


Accessories and spare parts

A hand crank 3AX 1530-2B for charging the closingspring can be supplied as an accessory:

Owing to the fact that all parts of this breaker type havebeen optimized to the last the normal service life, it isnot possible to recommend particular spare parts forkeeping in stock.

When ordering spare part state the following:1. Type designation, design code and serial number

of the 3AH3 vacuum circuit-breaker (see ratingplate)

2. The designation and part number, makingreference to illustrations in these operatinginstructions or to a photograph or sketch asapplicable. Alternatively, a sample may besubmitted.

Published by thePower Transmission and Distribution GroupSchaltwerk Berlin

Translated bySLC PTD MCEdition 1/March 2001

Subject to change

3AX 1530-2B :

, ,

.

:1. 3AH3 , ( ).

2. , , .

Schaltwerk

1/03/2001

- 5/5 -

Order No. / : 3ZX1812-0AH30-0AN1 / 9229 9860 174 –SLC PTD MCPlace of order / : SLC PTD MC ShangHai

3ah3 import

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