Type designation 1/2
Rating plate 1/2
Standards and specification 1/3
Ambient temperature/humidity
loadability 1/3
Site altitude 1/4
Electrical data 1/5
Operating times 1/6
Switching duties 1/6
Motor operating mechanism 1/6
Auxiliary switch 1/7
Low-voltage plug connector 1/7
Shunt closing release 1/7
Shunt release 1/7~1/8
Undervoltage release 1/8
CT-operated release 1/8
Breaker tripping signal, cut-out
Switches (S6 and S7) 1/9
Varistor module (V1 to V3) 1/9
Electrical local closing/
Electrical interlocking 1/9
Mechanical interlocking 1/9
Dimensions and weights 1/9
Description 2/1~2/5
Construction 2/1~2/3
Vacuum interrupters 2/4
Complement 2/5
Installation
Installing in cubicle or on truck 3/1
Flat bar connection 3/1~3/2
Control leads 3/2
Earthing 3/2
Circuit documents 3/2
Function schematic diagram 3/3~3/4
Operation
Commissioning 4/1~4/2
Charging and closing spring 4/2
Closing 4/2
Tripping 4/2
Maintenance
Safety measures 5/1
Servicing 5/1
Cleaning 5/1
Abnormal operating conditions 5/2
Checking the contact systems 5/2
Checking the vacuum 5/2
Service life 5/3
Accessories and spare parts 5/4
Note: The items illustrated in the Figures are
enumerated in the fold–out central
legend.
When ordering the operating instructions please
quote the order No.9229 9860 174 0D- SLC PTD
MC.
ages 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 (Vbreaker) are of the triple-pole indoor type for rated
voltages between 7.2 and 36kV.
The vacuum circuit-breaker consists of the
mechanism housing complete with stored-energy
mechanism and control elements, the three poles
with vacuum interrupters, cast-resin insulators and
operating rods.
The mounting position (relative to the vacuum
interrupters) is vertical. Under certain conditions
horizontal mounting position is possible.
Horizontal mounting position needs to be
indicated when ordering. Please contact your
Siemens representative. The vacuum circuitbreaker can be used in practically any system
design.
Under normal operating conditions, the vacuum
circuit-breaker is maintenance free.
3AH3 vacuum circuit-breakers are identified by a
machine-readable product designation made up of a
series of figures and letters.
3 A H 3 1 1 7-7
(See catalog HG11 for selection and ordering data of
the respective circuit-breaker)
Rating plate
The rating plate which can be read in the operating
position, contains the following information:
1 Manufacturer 7 Rated short-circuit
duration
2 Type designation 8 Weight
3 Serial number 9 Rated operation
sequence
4 Design code 10 Rated frequency
5 Year of manufacture 11 Rated lightning impulse
6 Rated normal current withstand voltage
12 Rated short-circuit
13 Rated voltage
Fig.1/1
Rating plate
Note: in the event of any queries state the type
designation(2), designation code(4) and the serial
number(3).
The 3AH3 vacuum circuit-breaker comply with the
standards of IEC62 271-100, IEC60 694, BS 5311 and
DIN VDE 0670. The V-breakers 3AH3 for 15kV rated
voltage meet the requirements of the American
standards ANSI C37 with respect to their insulating
capacity.
Ambient temperature/humidity and loadability
The 3AH3 V-breakers are designed for the normal
operating conditions laid down in the standards.
Permissible ambient temperatures:
Maximum value =+40C
Average over a period of 24 hours =+35C
Minimum value = -5C
Permissible atmospheric humidity:
Relative humidity, 24 hours mean <
95%
Relative humidity, 1month mean <90%
Under these conditions condensation may occasionally
occur. The rated normal currents listed in Fig. 1/4 were
laid down for 40°C ambience in accordance with DIN
VDE/IEC. Use under conditions other than normal is
possible with certain measures that can be implemented on request.
The maximum permissible load current as a function of
the 3AH3 V-breaker ambient temperature has been
plotted in Fig.1/2. The load currents indicated apply to
open-type switchgear. Metal-enclosed switchgear must
be derated as specified by switchgear manufacturer.
Determination of the load characteristic number
负载特性曲线号的确定
Rated normal current load characteristic number
额定电流负载特性曲线号
1250A 2
2000A 4
2500A 5
3150A 6
4000A 7
Fig.1/2 Maximum permissible load current as a function of the switch
ambient temperature
Shortest pulse duration of breaker tripping signal for 1st shunt release /一级分励脱扣器最小脱扣脉冲信号时间
Shortest pulse duration of breaker tripping signal for 2
脉冲信号时间
nd
and 3rd shunt release /2 级和 3 级分励脱扣器最小脱扣
Fig.1/5 operating times/ 图.1/5 动作时间
ms
s
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
<80
<15
<65
<45
<15
<80
<60
300
<90
<70
45
40
20
>15
>10
Closing time = the interval of time between the initiation of
the closing operation and the instant when the contacts
touch in all poles.
Opening time = the interval of time between the initiation of
the opening operation and the instant when the contacts
separate in all poles.
Arc time = the interval of time between the instant of the
first initiation of an arc and the instant of final arc extinction
in all poles.
Breaking time = the interval of time between the beginning
of the opening time of a circuit breaker and the end of the
arcing time.
Close-open-time = the interval of time (in a make-break
operation cycle) between the instant when the contacts
touch in the first pole in the closing process, and the instant
when the arcing contacts separate in all poles in the
subsequent opening process
Switching duties
The operating mechanisms of the 3AH3 circuit-breakers are
suitable for rapid auto-reclosure. Breakers for a rated shortcircuit breaking current of ≥40kA are, at rated data levels,
suitable for rapid load transfer and till 31.5kA for rapid autoreclosure.
Motor operating mechanism
The maximum DC power input is 500 W (approx.) the
maximum AC power input is 650VA (approx.). During part
of the short spring charging time the motor operate in the
overload range. The recommended rating for motion
protection devices are shown in Fig.1/6 (the protection
devices are not supplied with the vacuum breakers and
must be ordered separately)
Recommended rating of protection device*
Rated supply voltage
保护装置推荐等级*
*) MCB with G characteristic
Fig.1/6 Rated currents of motor protection device.
The supply voltage may deviate from the rated value by
Two versions of the auxiliary switch can be supplied.
The standard version is fitted with 6 NO contacts and
6 NC contacts. The extended version is fitted with
12NO contacts and 12NC contracts.
Rated insulation voltage: AC/DC 250 V
Insulation class: C acc. to DIN VDE 0110
Current: 10A
Making capacity: 50A
AC 40 to 60 Hz/交流 40~60Hz DC/直流
Voltage
电压
U (V)
<230V 10 24
Fig.1/7 Breaking capacity of 3SV92 auxiliary switch
Low-voltage plug connector (X0)
The control elements of the 3AH3 vacuum circuitbreaker provided in the mechanism housing are wired
for external connection to the plug connector(X0). The
standard version is provided with a 64-pole plug
connector.
Shunt closing release (Y9) 3AY1510
The closing solenoid unlatches the charged closing
spring and thus closes the circuit-breaker electrically
It is available for both AC and DC operation. After
completion of a closing operation, the closing solenoid
is de-energized internally.
Power consumption approx. 140 W/VA
Shunt releases (shunt opening releases)
The shunt releases are used for automatic tripping of
circuit-breakers by means of appropriate protective
relays and for deliberate tripping by other electrical
means. They are designed for connection to external
voltage (DC or AC voltage). In special cases, for
deliberate tripping, they can also be connected to a
voltage transformer.
Shunt releases based on two different operating
principles are used.
Shunt release (Y1) 3AY1510
The 3AY1510 shunt release is used as standard in the
basic circuit-breaker version, with this design, the
electrically supplied tripping pulse is passed to the
″open″ latching mechanism by means of a direct-action
solenoid armature and the circuit-breaker is thus
opened. It is available for both AC and DC operation.
After completion of an opening operation, the AY1510
shunt release is de-energized internally. In operation
with AC voltage, a rectifier module 3AX1525-1F is
installed in the circuit-breaker.
Power consumption approx. 140 W/VA
The 3AX1101 shunt release is fitted if more than one
shunt release is required. With its design, the electrical
opening command is transferred in boosted form to the
″Open″ latching mechanism via a solenoid armature
through unlatching of a energy store and thus the
circuit-breaker is opened. Any varistors and rectifiers
required are integrated in the release.
Power consumption: <
60W or <55VA
Undervoltage release (Y7) 3AX1103 1)
Undervoltage release consist of a stored-energy
mechanism, an unlatching mechanism and an
electromagnet system which is connected continuously
to the supply when the circuit-breaker is in the close
state. If this voltage drops to below a certain value the
unlatching mechanism is released and opening of the
circuit-breaker is thus initiated via the stored-energy
mechanism.
The deliberate tripping of undervoltage release
generally takes place via an NC contact in the tripping
circuit. But it can also be carried out via an NO contact
by short-circuiting of the magnet coil. With this type of
tripping, the short-circuit current is limited by the built-in
resistors (see circuit diagram Fig.3/4)
Under voltage releases can also be connected to
voltage transformers. When the operating voltage
drops to impermissibly low levels, the circuit-breaker is
tripped automatically.
Power consumption: <
6.5 W or <7.5 VA
CT-Operated release (Y4) 3AX1102 1)
CT-operated releases consist of a stored-energy
mechanism, an unlatching mechanism and an
electromagnet system. When the tripping current is
exceeded (90% of the CT-operated release rated
current) the unlatching device of the stored-energy
mechanism is released and thus opening of the circuitbreaker is initiated. In addition to the primary current
transformer, matching transformers are required for
application of the CT-operated releases.
Power consumption for 0.5A and 1A<
6VA at 90% of
the rated current and with open armature.
CT-operated release (Y6) 3AX1104
1
)
(Low-energy release 0.1Ws)
In connection with a solid-state release (7SJ41
overcurrent time protection or similar) and low-power
primary current transformers (window-type
transformers), it is possible with the 3AX1104 to create
a CT-operated release without additional supply
voltage.
The 3AX1104 is of similar design as the 3AX1101
/1102 releases. With its coil data and its low energy
requirement of <
0.1Ws, its designend to be directly
actuated by a release impulse provided by a capacitor
of the above-mentioned electronic release systems.
1)Can be ordered on request, retrofitting possible.
When the vacuum circuit-breaker is tripped by means
of a release, the position switch S6 briefly makes
contact. This contact making can be used for signalling.
In the event of intentional mechanical tripping, the cutout switch S7 breaks this contact.
Varistor module (V1 to V3) 3AX1526
The disconnection of inductive loads in DC circuits may
cause switching overvoltage which pose a risk to
electronic control units. In order to prevent this, the
inductances of the circuit-breaker mechanism and
control (motor, closing solenoid, shunt release and
auxiliary contactor) can be connected to varistor (with
DC operation). For rated operating voltage of 60V to
220V DC the varistor module 3AX1526 is available as
an 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 be
released mechanically if the breaker is to be closed
locally. A version with electrical local closing can also
be supplied. In this version, the making circuit of the
circuit-breaker is activated electrically via a push-button.
In this way, allowance can also be made for
station-specific interlocks, and undesired making
operations prevented. For example, interlocking of the
circuit-breaker is possible via the auxiliary contact of a
disconnector.
Circuit-breaker with electrical local closing cannot be
closed mechanical.
Mechanical interlocking
Operating mechanism of disconnectors can be fitted
with a mechanical switchgear interlocking facility. The
disconnector and the associated circuit-breaker are in
this case interlocked mechanically.
The sensing parts check the switch position of the
circuit-breaker and prevent if from closing mechanically
and electrically if the associated disconnector is not in
a position to allow safe operation. On the other hand,
the disconnector is prevented from being operated
when the circuit-breaker is closed.
The mechanical interlocking facility can also be used to
interlock breaker trucks or draw-out breaker parts.
The vacuum circuit-breaker consists of the mechanism
housing (60.), the 3-pole assemblies (19.) with vacuum
interrupter (30.), cast-resin post insulators (16.1and
16.2), struts (28.) and of the operating rods (48.) with
contact pressure springs (49).
Each of three pole assemblies (19.) is supported by
two cast-resin post insulators (16.1and 16.2), which are
bolted to the pole plate (15) respectively.
The main feature of the 3AH3 vacuum circuit-breaker
are shown in Fig.2/1.
The mechanism housing (60.) accommodates all
electrical and mechanical elements required for
opening and closing the vacuum circuit-breaker. Fig.
2/2 shows the arrangement of the individual modules in
the mechanism housing.
The mechanism housing has a detachable cover
60.1(Fig.2/3).
This cover (60.1) has cutouts for the actuating and
indicating devices.
The vacuum circuit-breaker is closed by means of the
pushbutton (53.). The motor (50.4) immediately
recharges the closing spring (62.). In the event of motor
power supply failure, the closing spring can be charged
by means of a hand crank (50.). The cover
includes an opening (50.1) for the hand crank, behind
which the hand crank coupling (50.5) of the gearing
(50.2) is located. The stored-energy mechanism state
is shown by the indicator (55.). The indicator (59.)
shows the breaker state (ON-OFF). The operating
cycle counter (58.) indicates the number of charging
operations. The rating plate (51.) is attached to the
mechanism housing but visible through an opening
(51.1) in the cover.
The movement is transmitted to the pole assemblies
via moulded-plastic operating rods (48.).
interrupter support (20.) with the upper terminal (27.),
the vacuum interrupter (30.), the lower interrupter
support (40.) with the lower terminal (29.), the clamp
(29.2) with the flexible connector (29.1) and angled
lever (48.6). The centering piece (28.1) and the struts
(28.) relieve the vacuum interrupters of external forces
see (Fig. 2/4).
The basic construction of the vacuum interrupters for
the 3AH3 vacuum circuit-breaker is shown in the
sectional view in Fig.2/5.
Depending on its type, the vacuum interrupter (30.) is
fixed to the upper interrupter support (20.). The arcing
chamber (33.) is located between two ceramic insulator
(32.). The fixed contact piece (31.) is connected
directly with the housing. The moving contact piece
(36.) is fixed to the terminal bolt (36.1) and is located
centrally in the guide (35.). The metal bellows (34.)
forms the vacuum-proof connection to the interrupter
housing.
Fig.2/5 vacuum interrupter
图. 2/5 真空灭弧室
The vacuum interrupters fitted in the 3AH3 vacuum
circuit-breaker are type-approved in accordance with
the X-ray regulations of the Federal Republic of
Germany. They conform to the requirements of the Xray regulations of January 8, 1987 (Federal LAW
Gazette Page 144) § 8 and annex Ш section 5 up to
rated short-time AC voltage stipulated in accordance
with DIN VDE/IEC.
The 3AH3 vacuum circuit-breaker are supplied in the
open state with the ″closing spring discharged″
indication (55.) visible. Before installing the 3AH3 Vbreaker, remove the transport device (skids and
spacers). Mount face loose supplied phase barrier in
accordance with the supplied drawings.
Before installing the 3AH3 vacuum circuit-breaker in a
cubicle or a truck check its rating plate data (to avoid
confusion) and compare the rated voltage indicated in
the delivery papers with the power supply voltage
available at the site.
On the vacuum circuit-breaker with undervoltage
release (Y7) 3AX1103, the arresting screw of the
hammer must be moved from position A to B (see
annex to operating instructions for release or note card
in 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 the
various types of installation (Fig.3/1). For installation of
vacuum circuit breakers with rated short circuit
breaking current >
pole plate.
Use M12 fixing bolts - strength class 8 – making
reference to the mandatory dimension drawings.
The rack or frame must be adapted to the operating
conditions and have adequate load bearing capacity
and stability.
* Holes for M12 bolts
* M12 螺栓孔
Fig.3/1 Means of fixing 3AH3 vacuum circuit-breake
图.3/1 3AH3 真空断路器的固定方法
Flat bar connection
Prior to fitting the conductors fix them so as to ensure
smooth contact with their connecting parts and with the
holes in full alignment.
Rub the contact faces to be bolted together with crisscrossing strokes using a wire brush until bright metal
shows and wipe then with a clean rag.
Note! Copper-sprayed and spray silver-plated surfaces
Differing contact materials (AL/CU) must not be worked
0
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with the same cleaning tool. Thinly grease the bright
contact faces with acid-free Vaseline (e.g. Shell
Vaseline 8420) or equivalent anti-corrosion agent and
bolt them together immediately
1
).
Note:
Silver-plated parts must not be bolted together with
aluminium bars.
Use the appropriate M12 nuts and bolts of strength
class 8 and corresponding spring elements and plain
washers.
Note! When tightening the terminal screws, counteract
the torque (70Nm~7mkp) by resisting it with a suitable
spanner or socket wrench.
Control leads
Vacuum circuit-breaker of standard design are
provided with a 64-pole low-voltage plug connector X0
(68.7.1). The corresponding plug for external
connection is designed for crimp connection of control
leads with a nominal section area of 1.5mm
2
. Use only
crimping tools (e.g. Amphenol crimp tongs TA 0500
with positioning sleeve TA 0000141 and TA 0007 146
2
0003)
).
Make reference to the circuit diagram supplied.
Earthing
Connect the vacuum circuit-breaker to the appropriate
high voltage protective earth by means of the suitable
marked M12 (70.)(see Fig.3/3) terminal on the top of
the mechanism housing (60.) using flat copper, copper
cable or hot galvanized steel strip (DIN VDE 0141/7.76
Item 5.3).
If the V-breaker with the mechanism housing are
installed in an earth metal rack so that firm electrical
contact is established, the mechanism housing need
not be earthed separately. When installing the switch
externally, toothed serrated washers (DIN 6789) must
then be placed under the bolt heads.
Fig.3/2
图 .3/2
Circuit documents
The wiring and connection of circuit-breaker is shown
in the circuit diagram supplied, depending on the
particular model and complement.
Typical circuit diagram for circuit-breaker are shown in
Fig. 3/3 and 3/5.
Fig.3/3 V circuit-breaker 3AH3 with manual and electrical
closing with 64-way plug connector
.3/3 带手动合闸, 电动合闸以及 64 针低压插座的
图
3AH3真空断路器
Closing and antipumping device
合闸及防跳装置
Tripping via NC
System wiring
系统接线
contact
跳闸回路常闭触
点
-Y6 -Y5
-Y7
1st shunt
release
一级分励脱扣
Tripping
via NC
contact
跳闸回路
Switch
tripping signal
closing spring charged signal
合闸弹簧储能信号
脱扣信号
HA Manual tripping/手动脱扣
HE Manual closing/手动合闸
K1 Anti-pumping contactor
防跳接触器
M1 Motor operating mechanism/马达储能机构
P Energy store/能量储存
R1 Resistor/电阻
S1 Auxiliary switch/辅助开关
S21, S22 Position switches (cut-out motor after
charging)
位置开关 (储能后切断马达回路)
S3 Position switches
(open when closing spring charged )
With this model, the auxiliary switch terminals are wired to the plug connector as illustrated
在这种模式下,辅助开关的终端通常连接至二次接插件如下图所示
Auxiliary switch standard
标准型辅助开关
D7 B3 B8 C5 D8 D9 B9 C9
Wiring not applicable if
nd
shunt release) fitted
B Y2 (2
E Y7 (undervoltage release) fitted
Auxiliary switch extended
延长型辅助开关
接线不适用如果
B 配 2级分励脱扣器 Y2
HA Manual tripping/手动脱扣
HE Manual closing/手动合闸
K1 Anti-pumping contactor
防跳接触器
M1 Motor operating mechanism/马达储能机构
P Energy store/能量储存
R1 Resistor/电阻
S1 Auxiliary switch/辅助开关
S21, S22 Position switches (cut-out motor after charging)
位置开关 (储能后切断马达回路)
S3 Position switches
(open when closing spring charged )
位置开关 (合闸弹簧储能后断开)
S41, S42 Position switches (signals charged state)
位置开关 (合闸弹簧储能信号)
S6, S7 Position switches (for switch tripped signal)
位置开关 (脱扣信号)
X0 Low-voltage plug connector
二次插座
Touching of live will result in death or severe
personal injury.
High voltage!
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
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 mecha nism. Dot not touch pole assemblies(19.)
and operating rods (48.).
Commissioning
Prior to commissioning, check the V-breaker in accordance
with the following points:
1. Clean them as applicable (for details refer to ″cleaning″
2. Check all fixing and terminal screws for tightness.
3. Examine the circuit-breaker for any external damage,
!CAUTION
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.)
5. For test operations with the motor mechanism switch on
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the supply voltage. The motor will start immediately and
charge the closing spring (62.). check the mechanical
and electrical indication of the charging state of the
closing spring. Actuate the mechanism as indicated
under 4. And check the mechanical and electrical state
indication.
6. Check the auxiliary switch S1 (68.) and position switches
(50.4.1) electrically in both end positions by actuating the
3AH3 vacuum circuit-breaker.
7. Also check-by electrical actuation – the function of the
closing solenoid Y9 (53.1) and all fitted shunt release.
When correct functioning of the 3AH3 V-breaker has been
ascertained it can be put into service.
Charging the closing spring
When the supply voltage is applied the motor (50.4)
automatically charges the closing spring (62.). Should
the supply fail the closing spring (62.) can also be charged by
hand crank (50.). In the lattercase, as shown in Fig.4/1,the
hand 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 spring
discharged” shown in the indicator opening (55.3) is changed
to "closing spring charged” (Fig. 4/2).
Fig.4/1 Charging the closing spring with the hand crank
The adapter (50.6) is designed so that the hand crank (50.) is
decoupled on the recovery of the motor supply.
Fig.4/2 Closing spring discharged
″合闸弹簧未储能”
Closing
If operation is not blocked by the mechanical interlock, press
the close push-button (53.) or the corresponding control
switch until the 3AH3 vacuum circuit-breaker closes and both
indicates 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.) or
corresponding control switch until the V-breaker trips and
both indicates and signals this state.
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
Maintenance, repair and subsequent conver-
and then close and open the V-breaker by
hand ( V-breaker in open state "closing spring
discharged" indication visible).
Under normal operating conditions, the 3AH3 vacuum
circuit-breaker is maintenance-free. We recommend
nonetheless a regular visual inspection.
Cleaning
To ensure the insulating capacity, it is necessary that
the insulating components are clean. Insulating
components and external breaker parts must be wiped
with a damp cloth. Use only warm water with the
addition of a mild liquid household detergent as
cleaning 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
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.
If the 3AH3 vacuum circuit-breaker is used in
abnormally unfavourable indoor conditions (e.g.
frequent heavy condensation, dust-ridden air etc).
We recommend regular cleaning of the breaker
external components and, if necessary, renewal of the
anti-corrosion protection. Only the following products
may be used for the respective working parts of the
VCB.
Bearing, sliding surface:
Isoflex Topas L32
Klber- Lubrication KG
Geisenhausener Strae 7
Postfach 70 10 47
81379 Munich
Federal Republic of Germany
Bearings inaccessible to grease and bearings of the
auxiliary switch S1:
SHELL Tellus Oil 32
SHELL Oil trade company GmbH
Zitadellenstrae 5
P.O.Box 900915
21079 Humburg
Federal Republic of Germany
Joints and bearings which cannot be dismantled must not be treated with a cleaning agent prior to
reapplication of anti-corrosives.
After renewal of the anti-corrosion protection, several
mechanical test-switching operations should be
performed on the vacuum circuit-breaker.
Lubricants (for special conditions) are available from
the Siemens agent responsible:
Order No
180 g Klber-Isoflex Topas L32 3AX1133-3A
and 50 g SHELL Tellus Oil 32
180 g Klber-Isoflex Topas L32 3AX1133-3H
In the course of the service life of an interrupter, the
contact travel may move out of true.
This is caused by mechanical deformation
(compression) and/or erosion.
We have taken measures in design to ensure that such
minor changes in the travel do not affect the switching
performance of our circuit breakers.
Checking the vacuum
Such a check should be made if there is any risk of an
interrupter having developed a leak. Busbar and cable
connections must be split. The check is performed with
an HV test unit. If necessary, further information may
be obtained from the appropriate Siemens Regional
Office.
The maximum permissible number of mechanical
operating cycles is 10,000. The permissible number of
operating cycles as a function of the breaking current is
shown in Fig.5/2. When this permissible maximum has
been attained, the interrupters or the complete pole
assemblies must be renewed. Detailed instructions are
supplied with the replacement interrupters/pole
assemblies.
When ordering replacement interrupters or pole
assemblies, state the circuit-breaker type, design code
and serial number (see name plate)
Determination of the load characteristic number/ 负载开断特性函数号的确定
Rated voltage
额定电压
kV
Rated short-circuit breaking current
Number of breaking operations/开断次数
Fig.5/2 Permissible number of operating cycle as a function of breaking current Ia
图 5/2 断路器允许开断次数是开断电流 Ia 的函数 - 5/3 -
Owing to the fact that all parts of this breaker type have
been optimized to the last the normal service life, it is
not possible to recommend particular spare parts for
keeping in stock.
When ordering spare part state the following:
1. Type designation, design code and serial number
of the 3AH3 vacuum circuit-breaker (see rating
plate)
2. The designation and part number, making
reference to illustrations in these operating
instructions or to a photograph or sketch as
applicable. Alternatively, a sample may be
submitted.
Published by the
Power Transmission and Distribution Group
Schaltwerk Berlin