ABB VM1 User manual

—
MEDIUM VOLTAGE PRODUCTS
VM1
Vacuum circuit breaker
Table of contents
1 Summary 4
2 Structure 5
3 Function 7
4 Despatch and storage 10
5 Installation and mounting of the breaker 11
6 Commissioning/Operation 12
7 Maintenance 15
8 Application of the X-ray regulations 21
9 Figures 22
10 Technical data 32
11 Comparison of designations to
IEC 61346-1/61346-2, IEC 81346-1/81346-2
and VDE-DIN 40719 Part 2 50

2
VM1 - INSTRUCTION MANUAL BA 504/05 E
—
For your safety – always!
That’s why our instruction manual begins with
these recommendations:
• Only install switchgear and/or switchboards in
enclosed rooms suitable for electrical
equipment.
• Ensure that installation, operation and
maintenance are carried out by specialist
electricians only.
• Comply in full with the legally recognized
standards (DIN IEC/VDE), the connection
conditions of the local electrical utility and the
applicable safety at work regulations.
• Observe the relevant information in the
instruction manual for all actions involving
switchgear and switchboards.
DANGER!
Pay special attention to the hazard notes in the
instruction manual marked with this warning
symbol.
• Make sure that under operation condition of the
switchgear or switchboard the specified data are
not exceeded.
• Keep the instruction manual accessible to all
persons concerned with installation, operation
and maintenance.
• The user’s personnel are to act responsibly in all
matters affecting safety at work and the correct
handling of the switchgear.
• Always observe the five safety rules set out in EN
50110 on establishing and securing the off-circuit
condition at the place of work for the duration of
work on the switchgear.
- Isolate
- Secure to prevent reconnection
- Check the off-circuit condition
- Earth and short-circuit
- Cover the guard off adjacent live parts
If you have any further questions on this
instruction manual, the members of our field
organization will be pleased to provide the
required information.

MEDIUM VOLTAGE PRODUCTS
33
—
Contents
Page
1 Summary 4
1.1 General 4
1.2 Standards and specifications 4
1.2.1 Switchgear manufacture 4
1.2.2 Installation and operation 4
1.3 Operating conditions 4
1.3.1 Normal operating conditions 4
1.3.2 Special operating conditions 4
2 Structure 5
2.1 Structure of the operating mechanism 5
2.1.1 Structure of the control module 5
2.1.2 Storage capacitor 5
2.1.3 Sensor system 5
2.2 Structure of the breaker poles 6
2.3 Basic structure of the circuit breaker on
withdrawable part 6
3 Function 7
3.1 Function of the circuit breaker operating
mechanism 7
3.1.1 Magnetic actuator 7
3.1.2 Opening and closing procedure 7
3.1.3 Reclosing sequence 7
3.1.4 Circuit breaker controller 7
3.1.4.1 Function of the standard version 7
3.1.4.2 Extended functions in the full version 7
3.1.5 “READY“ lamp 8
3.1.6 Blocking magnet -RL2 8
3.2 Wiring diagrams for C.B. on withdrawable
part 8
3.3 Quenching principle of the vacuum
interrupter 8
3.4 Interlocks 9
3.4.1 Interlocks / protection against
maloperation for C.B. on withdrawable
parts 9
3.4.2 Interlocks within VM1 withdrawable
parts 9
3.4.2.1 Interlocks when using ABB
withdrawable assemblies are used 9
3.4.3 Interlocks when using non-original
withdrawable assemblies are used 9
4 Despatch and storage 10
4.1 Condition on delivery 10
4.2 Packaging 10
4.3 Transport 10
4.4 Delivery 10
4.5 Intermediate storage 10
5 Installation and mounting of the breaker 11
6 Commissioning/Operation 12
6.1 Note on safety at work 12
6.2 Preparatory activities 12
6.3 Earthing 13
6.4 Movement of the withdrawable breaker part 13
6.4.1 Manual insertion from the test/
disconnected position to the service
position 13
6.4.2 Manual withdrawal from the service
position into the test/disconnected
position 13
6.4.3 Withdrawal from the test/disconnected
position onto the service truck 13
6.4.4 Insertion from the service truck into
the test/disconnected position 13
6.5 Circuit breaker operation 14
Page
7 Maintenance 15
7.1 General 15
7.1.2 Instructions for capacitor life 15
7.2 Inspection and functional testing 16
7.2.1 Circuit breaker in general 16
7.2.2 Magnetic actuator operating
mechanism 16
7.2.3 Withdrawable part 16
7.3 Servicing 16
7.3.1 Circuit breaker in general 16
7.3.2 Magnetic actuator operating
mechanism 17
7.3.3 Breaker pole 17
7.4 Repair 17
7.4.1 Repair of surface damage 17
7.4.2 Replacement of components 18
7.5 Tests on withdrawable parts with VM1
type circuit breakers 18
7.5.1 Checking the auxiliary switch settings
on withdrawable parts 18
7.5.2 Checking of interlock conditions 19
7.6 Spare parts, auxiliary materials, lubricants 19
7.6.1 Spare parts 19
7.6.2 Auxiliary materials and lubricants 20
8 Application of the X-ray regulations 21
9 Figures 22
10 Technical data 32
10.1 Technical data, general 32
10.1.1 Technical data for Control electronics 32
10.1.2 Technical data for AC/DC converter 32
10.1.3 Permissible number of vacuum
interrupter operating cycles 33
10.2 Technical data Circuit breakers for fixed
installation 35
10.2.1 Performance data and weights 35
10.2.2 Dimensions 37
10.3 Technical data Circuit breakers on
withdrawable part 40
10.3.1 Performance data and weights 40
10.3.2 Dimensional drawings 42
10.3.3 Wiring diagrams for C.B. on
withdrawable part 48
11 Comparison of designations to
IEC 61346-1 / 61346-2, IEC 81346-1 / 81346-2
and VDE-DIN 40719 Part 2 50

4
VM1 - INSTRUCTION MANUAL BA 504/05 E
—
1. Summary
1.3 Operating conditions
1.3.1 Normal operating conditions
Design to VDE 0670, part 1000, “Common
specifications for high-voltage switchgear and
controlgear standards” and IEC publication
60694, with the following limit values:
• Ambient temperature:
- Maximum + 40 °C
- Maximum 24 hour average + 35 °C
- Minimum (according to “minus 25
indoor class”) - 25 °C
• Humidity:
- the average value of the relative
humidity, measured over a period
of 24 h, does not exceed 95%
- the average value of the water
vapour pressure, over a period
of 24 h, does not exceed 2.2 kPa
- the average value of the relative
humidity, over a period of one
month, does not exceed 90%
- the average value of the water
vapour pressure, over a period
of one month, does not exceed 1.8 kPa
• Maximum site altitude:
- ≤1000mabovesealevel.
1.3.2 Special operating conditions
Special operating conditions are to be agreed on
by the manufacturer and user. The manufacturer
must be consulted in advance about each special
operating condition:
• Site altitude over 1000 m:
- Allow for the reduction in the dielectric strength
of the air.
• Increased ambient temperature:
- Current carrying capacity is reduced.
- Provide additional ventilation for heat
dissipation.
• Climate:
- Avoid the risk of corrosion or other damage, e.g.
to the operating mechanisms, in areas:
• with high humidity and/or
• with major rapid temperature fluctuations.
- Implement preventive measures (e.g. electric
heaters) to preclude condensation phenomena.
1.1 General
The vacuum circuit breakers of type VM1 are
intended for indoor installation in air-insulated
switchgear.
Within the limits of their technical data, they have
a switching capacity which is sufficient to
withstand the loads occurring during the
switching on and off of equipment and switchgear
components under normal and fault conditions.
Vacuum circuit breakers have particular
advantages for use in systems where the
switching frequency in the operating current
range is high, and/or where a certain number of
short-circuit breaking operations have to be
reckoned with.
Vacuum circuit breakers of type VM1 are prepared
for auto-reclosing operations and are notable for
their especially high operational reliability and
extremely long service life with complete freedom
from maintenance.
The vacuum circuit breakers of type VM1 in column
design can be supplied both on withdrawable
parts and as individual
units for stationary mounting and mounted on
trucks. Their basic structure is shown in section
“Technical data“.
1.2 Standards and specifications
1.2.1 Switchgear manufacture
The switchgear complies with the following
specifications in accordance with DIN VDE and the
relevant IEC publications:
• VDE 0670, part 1000 and IEC 60694
• VDE 0671, part 100, and IEC 62271-100.
1.2.2 Installation and operation
The relevant specifications are to be taken into
account during installation and operation,
particularly:
• DIN VDE 0101, Power installations exceeding AC 1 kV
• DIN VDE 0100-410, Erection of power installations
up to 1000 V, protective measures
• VDE 0105, Operation of electrical installations
• DIN VDE 0141, Earthing systems for special power
installations with rated voltages above 1 kV
• Accident prevention regulations issued by the
appropriate professional bodies or comparable
organisations.
• In Germany, these comprise the following safety
regulations:
- Health and Safety at Work Standards BGV A1 and
BGV A3
• Safety guidelines for auxiliary and operating
materials
• Order related details provided by ABB.

MEDIUM VOLTAGE PRODUCTS
55
—
2. Structure
2.1 Structure of the operating
mechanism (Figures 9/11 to
9/14 and 9/26)
The operating mechanism is of the magnetic
type. It fundamentally consists of the magnetic
actuator 10, the control module 27 with sensor
systems, the storage capacitor(s) 26 and the
linkages which transmit the force to the breaker
poles.
In addition, there are supplementary components
for emergency manual opening and the controls
located on the front of the enclosure.
The actuator 10 acts on the three breaker poles
via lever shaft 18.
The storage capacitor 26 provides the necessary
actuating energy on demand.
The mechanical switch positions of the circuit
breaker are detected by two sensors 15 and 16
directly at lever shaft 18.
There are rating plates 7 with the main data of
the switching device on front plate 1.1, and at the
left side in the mechanism
enclosure.
The basic version of the magnetic actuator
mechanism is fitted with the following controls
and instruments (figure 9/17):
• ON push-button 3
• OFF push-button 4
• Emergency manual OFF 8
• Mechanical position indicator 6
• Mechanical operating cycle counter 5
• Signal lamp for switching readiness 2 (“READY”
lamp).
The following may also be installed:
• Five-pole auxiliary switches for switch position
signal:
- BB1 and -BB3.
2.1.1 Structure of the control module
(Figures 9/14 and 9/16a)
Control module ED 2.0 produces a voltage of 80 V
from any supply voltage within the input voltage
range, with which the storage capacitor(s) is/are
charged. This is also used to generate a voltage of
18 V to supply the breaker controller.
The circuit breaker controller consists of:
• a microprocessor,
• electronic optocouplers for input,
• relays for output,
• power electronics to control the actuator coils.
2.1.2 Storage capacitor
(Figures 9/14, 9/16b and 9/26)
The energy for operation of the circuit breaker is
stored electrically in a capacitor. Circuit breakers
for breaking currents of 31.5 kA and above are
fitted with two capacitors. The capacitors are
designed in such a way that the energy for an
OFF-ON-OFF operating cycle is provided without
recharging.
The energy stored by the capacitor is permanently
monitored. This is achieved by measuring the
capacitor voltage.
The “READY” lamp indicates that supply voltage is
applied and the circuit breaker is ready for the
impending switching operation (see also sections
3.1.5 and 6.2).
The energy stored in the capacitors is one
criterion for illumination of the “READY“ lamp:
• Case 1: Breaker in the OFF position.
- The energy available is sufficient for an ON and
an OFF switching operation.
• Case 2: Breaker in the ON position.
- The energy available is sufficient for an OFF
switching operation.
- The energy available is sufficient for an OFF
switching operation in the first 60 or 120
seconds (from 31.5 kA) after failure of the
auxiliary power supply (see also section 6.5).
If the energy stored is not sufficient, the “NOT
READY“ contact is closed, indicating that the
switch is not ready for operation.
2.1.3 Sensor system
(Figures 9/13 and 9/14)
The systematic use of sensors permits control of
the circuitbreaker without auxiliary switches.
Two inductive proximity switches 15 and 16 are
used to detect the mechanical limit positions,
which also provide for self-monitoring of the
system.

6
VM1 - INSTRUCTION MANUAL BA 504/05 E
2.2 Structure of the breaker poles
(Figures 9/7, 9/9 and 9/12)
The poles in column design are mounted on the
bracketshaped rear part of mechanism enclosure
1. The live parts of the breaker poles are enclosed
in cast resin and protected from impacts and
other external influences.
With the breaker closed, the current path leads
from the upper breaker terminal 25 to the fixed
contact 24.2 in the vacuum interrupter 24, then via
the moving contact 24.1 and the flexible connector
21 to the lower breaker terminal 22.
The switching motions are effected by means of
the insulated link rod 19 with internal contact
force springs 20.
2.3 Basic structure of the circuit
breaker on withdrawable part
(Figures 9/7 to 9/10, 9/17 and
9/22)
The withdrawable part, which can be moved
manually, consists of a steel sheet structure on
which the circuit breaker with its ancillary
components is mounted.
Insulated contact arms 34 with the spring-loaded
contact systems 34.1 are fitted to the circuit
breaker poles. These create the electrical
connection to the panel when the withdrawable
part is inserted into the service position.
A multi-pole control wiring plug connector 36.1
connects the signalling, protection and control
wiring between the panel and the withdrawable
part.
The withdrawable assembly and the circuit
breaker are connected via a multi-pole control
wiring plug connector 37.
As soon as the withdrawable part 31 has been slid
into the panel and its base frame has engaged in
the test/disconnected position, it is positively
connected to the panel. At the same time, it is
earthed by its travel rollers in their rails. The
magnetic actuator mechanism of the circuit
breaker, including its controls and indicators, is
accessible at the front of the withdrawable part.
Withdrawable parts of the same version are
interchangable.With the same dimensions but
different circuit breaker equipment, an optional
coding of the control wiring plug can prevent
impermissible combinations of withdrawable
parts and panels (see figure 9/15).
—
2. Structure

MEDIUM VOLTAGE PRODUCTS
77
3.1 Function of the circuit breaker
operating mechanism
3.1.1 Magnetic actuator (Figure 9/12)
The actuator is the heart of the circuit breaker
operating mechanism. It combines the following
integrated functions:
• latching in the limit positions,
• release,
• switching.
The actuator is a bistable permanent magnet
system in which the armature motion is effected
by activating the ON or OFF coil. In the limit
positions, the armature is held in place
magnetically by the field of two permanent
magnets. Release of a switching operation is
effected by exciting one of the two coils until the
latching force of the permanent magnets is
exceeded temporarily.
3.1.2 Opening and closing procedure
(Figures 9/11 to 9/12)
The opening and closing processes can be remote
controlled by applying a voltage to input -MC (ON)
and -MO1 (OFF) (see also sections 10.1.1a and 6.2).
The breaker can be operated locally by pressing
push-buttons 3 and 4.
In the closing process, the armature motion acts
direct via lever shaft 18 on the moving contact
24.1 until the contacts meet.
In the further motion sequence, the pretensioned
spring arrangement 20 is tensioned to 100 % and
the necessary contact force thus applied. The
available overtravel is greater than the maximum
contact burn-off throughout the life of the
vacuum interrupter.
3.1.3 Reclosing sequence
The operating mechanism is fundamentally
prepared for reclosing, and with the short
recharging time of the storage capacitor (max. 5
s) it is also suitable for multi shot reclosing.
3.1.4 Circuit breaker controller
The control module is available as a standard
version and as a full version.
3.1.4.1 Function of the standard version
All the conditions for control of the opening and
closing commands to the magnetic actuator are
defined in a microprocessor:
• Supply voltage must be applied to the AC/DC
converter.
• The storage capacitor must be sufficiently
charged for the next switching operation:
—
3. Function
Switch position Storage capacitor-energy for
OFF ON and OFF
ON OFF
• The closing coil can only be activated when the
breaker is OFF.
• Closing is disabled when an opening command is
simultaneously active.
• Deactivation of the opening or closing coil takes
place when the relevant limit position has been
reached.
If the ON limit position is not reached within
70 ms during a closing operation, an opening
operation is immediately initiated so as to ensure
a defined switch position in all cases.
• The anti-pumping system ensures that only one
ON-OFF operation is performed when a closing
command is active and followed by an opening
command. The active closing command must be
cancelled and reset for the next closing operation.
• Activation of the closing coil (-RL1) can be blocked
by an external blocking signal.
• Input -RL1 “closing lock-out” (closed circuit shunt
release) must be energized for the circuit breaker
to be closed.
• In the as-delivered condition of devices for
stationarymounted installation (without wiring),
this input is therefore provided with a voltage of
80 V by an internal circuit as soon as the storage
capacitor is charged.
• If this closed circuit shunt release -RL1 is used to
monitor an external voltage, the voltage to be
monitored is to be applied to this input.
3.1.4.2 Extended functions in the full version
In addition to the functions of the standard
version, the full version contains the following
functions:
• Untervoltage release -MU
This input switches the VM1 off if the voltage
applied falls below the tolerance range stipulated
in IEC 62271.
The nominal value of the voltage to be monitored
is set at the works in accordance with the
specification in the order.
In order to prevent switch-off when the voltage
briefly falls below the specified level, a tolerance
time can additionally be set.
If no voltage is applied to -MU, the VM1 cannot be
closed normally. However a closing support
function is provided, that can enable the closing
operation even if no voltage is applied to -MU. If
after this closing operation no voltage is applied
to -MU, the VM1 will switch off.

8
VM1 - INSTRUCTION MANUAL BA 504/05 E
The function of -MU can on the control module be
deactivated if it is not required. If the function of
-MU is deactivated, the VM1 can be opened and
closed without any voltage being applied.
For the coding of the DIP switches, see figure
9/16a.
• Monitoring of the closing and opening coil of the
actuator
This function monitors the closing and opening
coil of the actuator for cable breakage. If such a
breakage is detected, the “READY” lamp on the
front of he switching device goes out and
corresponding signals (-DR, -DN) are issued.
• Additional contacts for position signalling
An additional pair of NO contacts to signal the ON
and OFF positions are made available by the
controller (-DO2, -DC2).
• Direct opening without microprocessor is
supported
The second opening input -MO2 (in the full version
on the control module) is designed in such a way
that an opening command is executed directly
without being passed through the microprocessor.
3.1.5 The “READY” lamp monitors the following
conditions:
• supply of auxiliary power to the VM1 circuit
breaker (see also section 6.2),
• detection of a defined ON or OFF position by the
position sensors,
• monitoring of the controlled function of the
microprocessor – Watchdog,
• sufficient voltage at the capacitor for the next
switching operation (see also section 2.1.2) and
• continuity of the actuator coils 1).
The “READY“ lamp does not monitor the status of
inputs -RL1 and -MU1). Therefore, it may happen
that the VM1 will not perform a closing operation
even though “READY“ is shining. In that case, the
status of inputs -RL1 and -MU1) has to be checked.
A flashing “READY” lamp signals recharging of the
capacitor.
Switching readiness is enabled during that time.
This interlock is cancelled by applying the supply
voltage to blocking magnet -RL2 and the READY
contact -DR.
3.1.6 Blocking magnet -RL2 (Figure 9/28)
Blocking magnet -RL2 fitted to:
• manually movable VM1 withdrawable parts,
• ZS8.4 withdrawable parts without mechanical
plug connector interlock.
The blocking magnet prevents the withdrawable
part from being moved when no supply voltage is
applied. This interlock is cancelled by applying the
supply voltage to blocking magnet -RL2.
3.2 Wiring diagrams for C.B. on
withdrawable part (Figures
10/10 to 10/13 and 9/15)
• The wiring diagrams, shown in figures 10/10 to
10/13, cover the basic equipment and all the
possible configurations of the various VM1 series.
The scope of equipment which can be installed
within each series is detailed in the relevant
switching device list. The actual equipment
installed in the individual case can be found in the
order documents.
Panel type Plug type Figure no.
ZS1 ,UniGeartypeZS1 ,
UniSafe, Powerbloc and
Mounting frame
58-pincontrol
wiring plug
10/10
and10/11
ZS8.4 64-pincontrol
wiring plug
1 0/1 2
and
1 0/1 3
• It is possible to encode the 58-pin control wiring
plug connector to define the assignment of the
breaker withdrawable parts to particular panels.
Impermissible combinations of withdrawable
parts and panels are thus prevented. The possible
encoding of a 58-pin plug is shown in figure 9/15.
3.3 Quenching principle of the
vacuum interrupter
Due to the extremely low static interrupter
chamber pressure of 10-4 to 10-8 hPa, only a
relatively small contact gap is required to achieve
a high dielectric strength. The vacuum arc is
extinguished on one of the first natural current
zeros.
Due to the small contact gap and the high
conductivity of the metal vapour plasma, the arc
drop voltage, and additionally, due to the short
arcing time, the associated arc energy, are
extremely low, which has advantageous effects on
the life of the contacts and thus on that of the
vacuum interrupters.
1) Full version on the control module, optional
—
3. Function

MEDIUM VOLTAGE PRODUCTS
99
3.4. Interlocks
3.4.1 Interlocks/protection against
maloperation for C.B. on withdrawable
parts (Figure 9/8)
A series of interlocks are provided to prevent
dangerous situations and any maloperation. The
interlocks of the panel system ZS and/or the
Powerbloc/mounting frame, which are normally
effective, are as follows (concerning the circuit
breaker):
• The withdrawable part can only be moved from
the test/ 2disconnected position into the service
position (and back) with the circuit breaker open
(that means that the breaker must be opened
before).
• The circuit breaker can only be closed if the
withdrawable part is precisely in the defined test
position or service position (electrical interlock).
• The circuit breaker can only be opened manually in
the service or test position when no control
voltage is applied, and it can not be closed.
• The panel is equipped with devices which allow
the connection and disconnection of the control
wiring plug 36.1 only in the test/disconnected
position.
3.4.2 Interlocks within VM1 withdrawable parts
3.4.2.1 Interlocks when ABB withdrawable
assemblies are used (Figures 9/10, 9/27
and 10/10 to 10/13)
1. The VM1 can only be closed via input -MC when
a voltage of 24 V to 240 V AC/DC is applied to
input -RL1 (electrical closing lock-out).
2. The VM1 can only be closed when the with-
drawable assembly is in service or test
position. In the intermediate positions, the
voltage for the closing lock-out -RL1 is
interrupted by auxiliary switches -BT2/-BT1.
3. A mechanical interlock 35.5 and 41.2 prevents a
breaker that is not in the OFF position being
moved.
3.4.3 Interlocks when non-original withdrawable
assemblies are used (Figures 9/27, 10/3
and 10/15 to 10/19)
VM1 circuit breakers which are not mounted on
ABB withdrawable part must be electrically
interlocked with one or two additional auxiliary
switches. These must interrupt the input voltage
to the electrical closing lock-out (input -RL1).
In a similar manner to auxiliary switches -BT2 and
-BT1 on the ABB withdrawable part, no further
electrical pulse may be received by -RL1 after the
first half revolution of spindle system 35.1, and it
may only be re-applied after the last half
revolution. This ensures that the circuit breaker
cannot be closed when the withdrawable part is in
an intermediate position.
An interlock as described in 3.4.2.1 part 3, is to be
implemented to prevent a circuit breaker which is
not in the OFF condition from being moved. The
slide blocker 41.2 on the VM1 (optional accessory
for stationary mounted breakers) can be used for
this purpose: the slide blocker is outside base
plate 41.4. Figure 9/27 shows pawl 35.5 on the ABB
withdrawable part. With the circuit breaker not in
the OFF position, pawl 35.5 cannot be moved
upwards. This prevents movement of the
withdrawable assembly and therefore movement
of the circuit breaker.
Note:
Additionally fitted interlocks must not exert any force on the operating
mechanism of the circuit breaker.
As the interlock mechanism projects beyond the base of the circuit
breaker casing, measures must be taken to prevent the the circuit breaker
from weighing down on the interlock, for instance during transport.

10
VM1 - INSTRUCTION MANUAL BA 504/05 E
—
4. Despatch and storage
4.1 Condition on delivery
• The factory-assembled switching devices are
checked at the works for completeness of the
equipment installed and simultaneously subjected
to a routine test in accordance with VDE 0670, part
1000 or IEC publication 60694, thus verifying their
correct structure and function.
Storage capacitor 26 is discharged by the
connected control electronics, and has a terminal
voltage of < 10 V when delivered.
4.2 Packaging
The switching devices are mounted individually on
a wooden pallet and sealed in film and/or packed
in cardboard for delivery.
Packaging for overseas shipment:
• Drying agent bags inserted in the film sealed
packaging.
4.3 Transport
Loading of the package units must only be carried
out with a
- crane,
- fork-lift truck and/or
- trolley jack.
Notes:
• Avoid impact during handling.
• Do not subject to other damaging mechanical stresses.
• Lifting gear must not be attached to the breaker poles or parts of the
operating mechanism.
Use lifting bores 1.2 and lifting lugs, e.g. in figure 9/11 and in the
dimensional drawings.
4.4 Delivery
The duties of the consignee on receipt of the
switching devices at site include the following:
• Checking the delivery for completeness and
freedom from damage (e.g. moisture and its
adverse effects).
• Any short quantities, defects or damage in transit:
- Must be precisely documented on the
consignment note.
- The shipper/carrier is to be notified immediately
in accordance with the liability provisions of the
German general conditions for forwarders
(ADSp/KVO).
Note:
Always document any major damage with photographs.
4.5 Intermediate storage
Conditions for optimum intermediate storage:
1. Devices with basic packaging or unpacked:
• A dry and well ventilated storeroom with
climate in accordance with VDE 0670, Part 1000
/ IEC 60694.
• Room temperature which does not fall below
–25 °C.
• Do not remove or damage the packaging.
• Unpackaged devices:
- Are to be loosely covered with protective
sheeting.
- Sufficient air circulation must be maintained.
• Check regularly for any condensation.
2. Devices with seaworthy or similar packaging
with internal protective sheeting:
• Store the transport units:
- protected from the weather,
- dry,
- safe from damage.
• Check the packaging for damage.
• If the maximum storage period starting from
the date of packaging has been exceeded:
- The protective function of the packaging is no
longer guaranteed.
- Suitable action must be taken if intermediate
storage is to continue.
3. Storage capacitor 26:
There is no time limit on storage when the above
conditionsare fulfilled.

MEDIUM VOLTAGE PRODUCTS
1111
—
5. Installation and mounting of the breaker
Recommended
tightening torque)
Nm
Lubricant 2)
Thread Without (dry) Oil or grease
M610 .54.5
M826 10
M10 50 20
M1 2 86 40
M16 200 80
1) The rated tightening torques for fasteners without lubrication are based
on a coefficient of friction for the thread of 0.14 (the actual values are
subject to an unavoidable, partly not inconsiderable, spread).
Rated tightening torques for fasteners with lubrication in accordance with
DIN 43 673.
2) Thread and head contact surface lubricated.
Any tightening torques which deviate from those in the general table (e.g.
for contact systems or device terminals) are to be taken into account as
stated in the detailed technical documentation. It is recommended that
the threads and head contact surfaces of the bolts should be lightly oiled
or greased, so as to achieve a precise rated tightening torque.
Careful and professional installation of the
switchgear is one of the fundamental conditions
of trouble-free circuit breaker operation.
• Install the mechanism enclosure in the panel
without distortion, placing a dished washer under
the nut and bolt head at each of the four mounting
points (depending on the order).
• Connect the main terminals without any residual
tension or pressure forces, exerted for example by
the conductor bars.
• When connecting the conductor bars, the bolts
must be inserted to the depth shown on the
dimensional drawing.
• Observe the tested terminal zone where
appropriate.
• Use DIN bolts of tensile class 8.8 together with
dished washers to fasten the conductor bars.
• Only use the tightening torques shown in the
following table.
• Remove any contamination (see also section 7.3.1.)

12
VM1 - INSTRUCTION MANUAL BA 504/05 E
—
6. Commissioning / Operation
6.1 Notes on safety at work
(Figure 9/17)
6.2 Preparatory activities (before
connecting the primary
voltage)
• Check the circuit breaker, withdrawable part,
contact arms, insulating parts etc. for damage,
and restore to their proper condition if necessary.
• Remove any dirt collected during transport,
storage or installation (particularly on the
insulating materials) as described in section 7.3.1.
• Remove lifting lugs T (Figures 10/1 to 10/7).
• Check the primary and secondary connections and
the protective earth conductor connection.
• Check the connection of the main earthing bar
with the station earthing conductor (DIN VDE
0141).
• Remove all material residues, foreign bodies and
tools from the switchgear.
• Properly refit all covers, etc., removed during
assembly and testing processes.
• Connect the supply voltage (Figures 9/16b and
10/10 to 10/13) - “READY” will shine. Inputs -RL1:
“Closing lock-out” and -MU 3): “Undervoltage
release” (if applicable) must be supplied with
power before the circuit breaker can be closed.
• For this reason, an internal circuit applies a
voltage of 80 V to the input -RL1 (Figure 9/16b), as
soon as the storage capacitor is charged in as-
delivered condition of devices with no connector
wiring.
• In case this input -RL1 is being used for an
interlocking with an external voltage, this internal
connection to 80 V has to be removed.
• “READY” will shine even if the closing operation is
blocked by inputs -RL1 or -MU 3).
• If no voltage is applied to input -RL1, closing is
impossible.
• If no voltage is applied to input -MU 3), closing is
impossible in case of activated -MU 3) and not
activated closing support (Figure 9/16a).
• Check mechanical and electrical interlocks for
effectiveness, without using force.
• Perform test closing and opening of the circuit
breaker by pressing push-buttons 3 and 4 (see
Figure 9/17).
• For any further questions on the functions of the
withdrawable circuit breaker part and its testing,
see section 7.5.
• Instruct the local operators in the fundamental
details of regular handling of the switchgear.
3) Full version on the control module, optional
 
specially trained personnel who are
familiar with the characteristics of the
particular switching device.
  
set out in section 1.2.
  
is moved it must be verified that the
circuit breaker is switched off. This is
the case when the mechanical position
indicator 6 shows the position “O” and
when “READY” is shining on the ready
lamp 2 while the breaker is supplied with
auxiliary voltage.
 
breaker has to be treated as “switched
on” if the switching position can not be
clearly determined. In this case all high
voltage connections to the breaker have
to be de-energized and zero potential
on the primary side of the breaker has
to be confirmed prior to commissioning,
operation, maintenance or repair work.
  
capacitor is greater than 350 mJ. The
procedure for discharge of the storage
capacitor as set out in section 7.1 is to be
observed.

MEDIUM VOLTAGE PRODUCTS
1313
6.3 Earthing
For the fixed version circuit breaker, carry out
earthing by means of the special screw marked
with the relative symbol.
Clean and degrease the area around the screw to a
diameter of about 30 mm and, on completion of
assembly, cover the joint again with vaseline
grease. Use a conductor (busbar or braid) with a
cross-section conforming to the Standards in
force.
6.4 Movement of the
withdrawable breaker part
(Figures 9/10, 9/17 and 9/21 to
9/23)
Perform switching operations with the front
doors shut.
6.4.1 Manual insertion from the test/
disconnected position to the service
position
• Connect control wiring plug 36.1.
• Close the front door.
• Ensure that the circuit breaker is in the OFF
position.
• Fit hand crank 38 on square spigot 35.2 of the
spindle mechanism 35.1.
Note:
In order to avoid damage to the operating mechanism, use the original
hand crank only.
- Standard version without slip clutch
- Optional version with slip clutch
• Turn the crank clockwise according the table until
the stop is reached and the withdrawable part 31
is in the service position.
Note:
Do not use force to move the withdrawable breaker part.
Maximum torque 25 Nm!
Comply with the conditions for movement of the
withdrawable part as set out in section 7.5.4!
Panel type Number of crank turns
 
ZS1 ,UniSafe,UniGear
typeZS1 ,Powerbloc
and Mounting frame
20 30
ZS8.4withouttee-off
partitioning
20 25
ZS8.4withtee-off
partitioning
2525
• Observe the position indicator in the front door.
• Remove hand crank 38 by first pressing slightly
against the hand crank and then remove.
Note:
When removing the crank, it is essential to ensure that the spring-loaded
guide 35.6 slides into the untensioned front position. Spindle 35.1 is thus
locked in place, preventing inadvertent turning of the spindle. Turning of
the spindle opens auxiliary switches -BT2/-BT1 and thus prevents the
circuitbreaker from being operated.
Note:
The withdrawable part must not be stopped at any position in the travel
range between the service position and test/disconnected position!
6.4.2 Manual withdrawal from the service
position into the test/disconnected
position
• Ensure that the circuit breaker is in the OFF
position.
• Reverse the procedure described above for
insertion into the service position.
Note:
Withdrawable parts with blocking magnet -RL2 may not be forcibly moved
during power failures. In such a case they are blocked in the service and
test positions. For deblocking, see section 7.5.4.
6.4.3 Withdrawal from the test/disconnected
position onto the service truck (Figures
9/22 and 9/23)
• Open the door of the circuit breaker compartment.
• Pull out control wiring plug 36.1 and place it in the
receptacle provided.
• Position service truck 40 with the guide pins 40.2
of the adjustable bench top at the correct height
facing the panel front, and allow catch 40.3 to
engage.
• Move sliding handles 35.3 inwards against the
springs to release withdrawable part 31, withdraw
onto the service truck and secure it in the catches
on the truck.
• Press the release lever (at the front underneath the
bench top) and release the service truck from the
panel.
6.4.4 Insertion from the service truck into the
test/disconnected position
• Carry out the procedure as described above for
withdrawal, changing the order accordingly.

14
VM1 - INSTRUCTION MANUAL BA 504/05 E
6.5 Circuit breaker operation
(Figures 9/17 to 9/21)
The power supply has been established when the
“READY“ lamp 2 lights up.
Please also note the remarks in Section 3.1.5.
1. Closing:
• Remote control by applying a voltage to input
-MC (see sections 10.1.1a and 6.2) or locally by
pressing ON pushbutton 3.
2. Opening:
• Remote control by applying a voltage to input
-M01 (see also sections 10.1.1a and 6.2) or
locally by pressing OFF push-button 4.
3. Opening in case of power failure:
a) Opening via the remote control system or by
pressing push-button 4 is initially still
possible:
- up to 60 seconds for breaking currents up
to 25 kA
- up to 120 seconds for breaking currents up
to 31.5 kA.
b) Manual emergency opening is possible
beyond these times.
Insert emergency manual operation lever 28
into socket 8 in the front plate and turn it
anti-clockwise to open the circuit breaker.
During this the auxiliary spring 29 on the
lever 28 will be charged at first. After a
movement of about 65° to 70° a resistance
must be overcome which is generated from
the removal of the armature in the actuator.
Then the circuit breaker is swiched off. A
further rotation will be a free movement.
c) On power failure and after expiry of the
times stated under 3a), the circuit breaker
remains in its current position. If an
automatic switch-off is desired
immediately on expiry of the times stated
under 3a), this behaviour can be effected
by cactivating DIP switch I 1004/1 (see
figure 9/16a, “AUTO-OFF on declining
capacitor voltage”).
4. Closing on failure of the supply voltage:
Closing is not appropriate and not possible.
5. Operating cycle and position indicators on
the switching device:
After each operating cycle (ON-OFF), the
operating cycle counter 5 is incremented by
one full digit.
On termination of a switching operation, the
position indicator 6 displays the relevant
switch position.
6. Anti-pumping system:
• The circuit breaker controller ensures that
closing of the circuit breaker is blocked when
an opening command is active.
• When closing on a subsequent opening
command, further closing with the still active
closing command is blocked. The closing
command must be issued again for the next
closing operation.
—
6. Commissioning / Operation

MEDIUM VOLTAGE PRODUCTS
1515
Maintenance serves to preserve trouble-free
operation and achieve the longest possible
working life of the switchgear. In accordance with
DIN 31 051 and IEC 61208, it comprises the
following closely related activities:
Inspection: Determination of the actual
condition
Servicing: Preservation of a functional
condition
Repair: Measures to restore the
functional condition
7.1 General
All VM1 vacuum circuit breakers are characterised
by a simple and robust construction. They have a
long life expectancy.
There is no adverse effect on the vacuum, even
from frequent switching of operating and short-
circuit currents.
The typical life expectancy of a VM1 vacuum circuit
breaker is determined by:
• Maintenance-free, potted vacuum interrupters for
up to 30,000 mechanical operating cycles.
• Magnetic actuator mechanism, maintenance-free
under normal service conditions:
- up to 100,000 operating cycles for all breakers
withabreakingcurrent≤25kAandarated
current≤1250A,
- up to 50,000 operating cycles for all breakers
witharatedcurrentof≥1600A,
- up to 50,000 operating cycles for all breakers
withabreakingcurrent≥31.5kA.
• Maintenance-free control module with sensors
and without auxiliary switches.
• Auxiliary switch ON/OFF position signalization
(optional) up to 30,000 switching cycles.
• Withdrawable part: With careful operation and
appropriately performed inspection work, up to
1000 movement operations can be achieved. See
also IEC 60298.
Concerning detailed information about the
maintenance of the VM1 circuit breaker please
contact the ABB service.
The service life data fundamentally apply to all
components which are not directly influenced by
the operator.
Components operated manually (movement of the
withdrawable part, etc.) may deviate, depending
on how they are handled.
The servicing intervals and scope are determined
by the environmental influences, the switching
frequency and the number of short-circuit
breaking operations.
Note:
The following must be observed for all maintenance work:
• The relevant specifications in section 1.2.2.
• Notes on safety at work in section 6.1
• Standards and specifications in the country of installation.
—
7. Maintenance
Maintenance work may only be performed
by fully trained personnel, observing all the
relevant safety regulations. It is
recommended that ABB after-sales service
personnel should be called in, at least
during the performance of servicing and
repair work.
While the work is in progress, and if the
work permits, all supply voltage sources
must also be disconnected and secured to
prevent re-connection.
Note:
In order to prevent accidents (particularly injury to hands!)
extreme care should be taken during all repair work on the
operating mechanism, especially with front plate 1.1 removed.
7.1.2 Instructions for capacitor life
The following instructions shall be observed in
order to guarantee the correct function of the
capacitor/s over time:
• if the capacitor is kept on stock or warehouse for
more than 2 years without power supply feeding,
it is required to replace the capacitor.
• if the capacitor is kept on stock or warehouse for
more than 1 year and less than 2 years in/out of
temperature tolerance range (-25°C to +55°C), the
reconditioning procedure of the capacitance by
reforming must be executed.
• it is recommended to replace the capacitor every
10 years for both normal and stressed use (10000
operations) and for conditions of temperature
within -25 °C to +55 °C.
• after 15 years the capacitor must be replaced.
• for applications in which the capacitors are
installed in parallel (two, three or more), they
should belong to the same production batch
hence to have the same batch number
YYWWXXXXX (QR-CODE).
The energy of the storage capacitor can be re-
leased uncontrollably during incorrect handling!
Procedure for capacitor discharge:
1. Switch circuit breaker on.
2. Switch supply voltage off (m.c.b.).
3. Switch circuit breaker by pressing push-
buttons 3 and 4 with cycle: OFF/ON/OFF.
The ”READY“ lamp will go out when this
switching cycle is completed, i.e., the switch is
no longer ready for switching operations.
4. After the following waiting times the storage
capacitor will have discharged down to lower
than 15 V:
• after approx. 4 minutes for breaking currents
up to 25 kA
• after approx. 8 minutes for breaking currents
of 31.5 kA and above.

16
VM1 - INSTRUCTION MANUAL BA 504/05 E
Where appropriate in individual cases, further
information can be found in the technical
documentation appurtenant to the switchgear
system (e.g. agreed special operating
conditions) in addition to this operating
manual.
7.2 Inspection and functional
testing
7.2.1 Circuit breaker in general
• Under normal operating conditions, inspection
within the stated number of operating cycles is
not necessary.
• Inspection may be necessary under exceptional
operating conditions (including adverse climatic
conditions) and/or particular environmental
stresses (e.g. serious contamination and
aggressive air).
• The inspection primarily comprises visual
examination for contamination, corrosion,
moisture and discharge phenomena on the high
voltage side.
If an irregular condition is found, appropriate
maintenance work is to be initiated.
• No external discharge may occur on the surfaces
of equipment at operating voltage. This can, for
example, be detected by characteristic noises, a
clearly perceptible smell of ozone, or visible
glowing in the dark.
• If irregular conditions are detected, then
corresponding repair measures should be
initiated.
7.2.2 Magnetic actuator operating mechanism
(Figures 9/17 and 9/26)
A first functional test of the operating mechanism
is to be performed:
• after the stated number of operating cycles, or
• during maintenance work as described in section
7.2.1.
Before the functional test, open the circuit
breaker and
• move it into the test position (withdrawable
breaker) or
• isolate and secure the working area in accordance
with the Safety Regulations to DIN VDE / IEC (with
stationary mounted breakers).
• Observe the procedure for capacitor discharge as
set down in section 7.1.
• Perform visual examination of the condition
(removing front plate 1.1), e.g.:
- the lubrication at the rotary bearings,
- the operating cycle counter,
- the sensor mounting,
- the position indicator.
Scope of functional testing:
• Connect the supply voltage.
• Perform several switching operations under no
load. This is predominantly applicable to circuit-
breakers which are rarely operated under normal
circumstances.
To check the storage capacitor, switch the
circuit breaker rapidly OFF-ON-OFF once,
pressing push-buttons 3 and 4 rapidly in
succession.
• The LEDs on the inductive proximity switches 15
and 16 are activated when the circuit breaker has
reached its OFF and ON limit positions.
7.2.3 Withdrawable part
• The inspection should always include a visual
examination of the withdrawable part assembly.
Special attention is to be paid to those parts
which may possibly be damaged by improper
handling.
• Perform a visual check on the condition of the
isolating contact system. It is recommended that
the contact system be turned alternately so that
its inner contact points can be cleaned.
If there are signs of impermissible overheating
(discoloured surface), the contact points are to
be cleaned (see the section on repairs).
• The interlock conditions and the ease of
movement of the withdrawable assembly are to be
checked as described under “Repair”.
When checking the interlock conditions, it is
essential toensure that no force is used.
Maximum torque 25 Nm!
7.3 Servicing
7.3.1 Circuit breaker in general
If the necessity of cleaning is established during
inspections as described in 7.2.1, the following
procedure is to be adopted:
• Prior to cleaning, isolate and secure the working
area if necessary in accordance with the safety
regulations of DIN VDE and IEC.
• Observe the procedure for capacitor discharge as
set down in section 7.1.
• Cleaning of surfaces in general:
- Remove weakly adhering dry dust deposits with
a soft dry cloth.
- Remove more strongly adhering dirt with a
slightly alkaline household cleanser, or with
Rivolta BWR 210.
• Cleaning of insulating material surfaces and
conductive parts:
- Minor contamination: with Rivolta BWR 210.
- Strongly adhering contamination: with cold
cleanser 716
—
7. Maintenance

MEDIUM VOLTAGE PRODUCTS
1717
After cleaning, wipe down with clean water and
dry carefully.
• Observe the manufacturer’s instructions and the
special ABB instruction manuals BA 1002/E or BA
1006/E on safety at work.
Note:
Use only halogen-free cleaning agents. Never use 1.1.1-trichloroethane,
trichloroethylene or carbon tetrachloride!
7.3.2 Magnetic actuator operating mechanism
The magnetic actuator mechanism is
maintenance-free up to the number of operating
cycles stated in section 7.1.
7.3.3 Breaker pole
The breaker pole with the vacuum interrupter is
maintenancefree up to the permissible number of
operating cycles as sent down in section 10.1.3.
The working life of the vacuum interrupter is
defined by the sum current limit corresponding to
the equipment data in individual cases in
accordance with section 10.1.3:
• When the sum current limit is reached, the
complete breaker poles are to be replaced.
Note:
Dismantling and replacement of the breaker poles should only be
performed by the ABB after-sales service or adequately trained specialist
staff, in particular with regard to the necessity for precise setting.
The following equipment, for example, can be
used to check the vacuum (without dismantling
the circuit breaker):
VIDAR vacuum tester,
from Programma Electric GmbH
Bad Homburg v.d.H. Germany
The following test values have to be set for
checking of the internal interrupter chamber
pressure with the VIDAR vacuum tester:
Rated voltage of
the circuit breaker DC test voltage
1 2kV 40kV
17.5kV 40kV
24kV 60kV
Testing is to be performed at the rated contact
distance in theOFF condition.
Procedure for vacuum interrupter testing for
stationary mounted switching devices:
• Isolate and secure the working area in accordance
with the Safety Regulations to DIN VDE / IEC.
• Open the VM1 circuit breaker.
• Earth all poles of the VM1 circuit breaker on one
side.
• Connect the earthed test lead of the VIDAR
vacuum tester conductively to the station earth.
• Connect the high voltage test lead of the VIDAR
vacuum tester with phase L1 of the unearthed pole
side and test the vacuum interrupter chamber with
the circuit breaker contact gap open. Repeat for
phases L2 and L3.
Note:
Connected cables may lead to a ”defective” indication on the vacuum
tester as a result of their cable capacitance. In such cases, the cables are
to be removed.
7.4 Repair
7.4.1 Repair of surface damage:
Circuit breaker part in general
Sheet steel parts, painted:
• Remove rust, e.g. with a wire brush.
• Grind off paint coat and degrease.
• Apply anti-rust primer and top coat.
• Use a top coat in the standard colour
• RAL 7035 or the relevant special colour.
Sheet steel parts with aluminium-zinc surfaces
and chromated functional parts:
• Remove white rust, with a wire brush or cleaning
pad (e.g. Scotch-Brite, white).
• Remove loosely adhering particles with a dry cloth.
• Apply zinc spray or zinc dust primer.
Functional parts, phosphated:
• Remove rust, with a wire brush or cleaning pad
(e.g. Scotch-Brite, white).
• Clean with a dry cloth.
• Grease with Isoflex Topas NB 52 lubricant.
Withdrawable circuit breaker part in general:
• Where required, regrease or thoroughly clean slide
plates and bearings in the panel and regrease
them with Isoflex NB 52 lubricant.
Remove the contact system for thoroughly
cleaning as described below (Figures 9/24 and
9/25):
- Slide the two inner annular tension springs 34.2
facing the breaker pole to a position beside the
other two outer annual tension springs, thus
releasing contact system 34.1, and remove the
contact system from contact arm 34.
- The contact pin of the contact system and the
slot on the contact arm are to be cleaned and
greased.
- Fit the contact system back to front on the thin
end of arbor 39, and slide it forwards onto the
thicker part of the shank.
- Fit arbor 39 onto the relevant contact arm 34,
slide the contact system 34.1 over onto the
contact arm, and withdraw the arbor.
- Check all contact fingers and annular tension
springs for perfect fit.
Note:
The set installation position of contact arms 34 must not be
changed by the improper use of force.

18
VM1 - INSTRUCTION MANUAL BA 504/05 E
7.4.2 Replacement of components
• Only remove and reassemble circuit breaker parts
and accessories when the breaker has been
switched off and the working area is to be isolated
and secured against reclosing.
• All supply voltage sources must be disconnected
and secured to prevent reconnection during the
removal and installation work.
• The storage capacitor is to be discharged in
accordance with the instructions in section 7.1.
1. Circuit breaker control unit:
• Replacement of the circuit breaker control unit
may only be performed by ABB after-sales service
staff or specially trained skilled personnel. Reason:
the internal sequence times for the control unit are
set by jumpers on each control unit.
2. Withdrawable assembly:
(Figures 9/8, 9/10, 9/27 and 9/28)
• Disconnect plug connector 37.
• Unbolt the circuit breaker from the withdrawable
assembly (4 x M12 bolts).
• Mount the circuit breaker on a new withdrawable
assembly in the reverse order.
• Check the settings of the slide blocker 41.2:
- The circuit breaker is in the ON position.
- The distance between pawl 35.5 on the
withdrawable assembly and slide blocker 41.2
must be 0.1+ 0.4 mm.
If a correction is necessary, the screw 41.5 has
to be released and the slide blocker 41.2 has to
be adjusted by a feeler gauge. Thereafter the
screw must be fixed again.
7.5 Tests on withdrawable parts
with VM1 type circuit breakers
The following conditions are to be checked to test
the function of the withdrawable part.
7.5.1 Checking the auxiliary switch settings on
withdrawable parts
(Figures 9/10 and 9/21)
Compliance with the interlock conditions in the
test/disconnected and service position areas is
ensured by position signalling switches -BT2 and
-BT1 located in the withdrawable assembly and
factory-set.
In test operations, the withdrawable part must be
moved by hand with the crank.
1. Settings in the area of the test/disconnected
position:
• Move the withdrawable part out of the test/
disconnected position towards the service
position with a few turns of the crank.
• Slowly move the withdrawable part back to the
stop.
- Auxiliary switch -BT2 must then switch over just
before the stop is reached.
• Slowly insert the withdrawable part from the test/
disconnected position towards the service
position until auxiliary switch -BT2 just operates
(approx. 30° rotation of the crank).
- It is no longer possible to switch the circuit
breaker on in this position.
- When the hand crank is turned further, the
position of the circuit breaker is polled by pawl
35.5 after a total angle of turn of approx. 90°. If
the circuit breaker is closed, the withdrawable
part cannot be moved any further.
• For this test, the function of the blocking magnet
-RL2 (if fitted) must be disabled manually.
2. Settings in the area of the service position:
• Move the withdrawable part out of the limit
position towards the test/disconnected position
with a few turns of the crank.
• Slowly move the withdrawable part forwards again
to the stop:
- Auxiliary switch -BT1 must then switch over just
before the stop is reached.
• Slowly move the withdrawable part out of the
service position towards the test/disconnected
position until auxiliary switch -BT1 just responds
(approx. 30° rotation of the crank).
- When the hand crank is turned further, the
position of the circuit breaker is polled by pawl
35.5 after a total angle of turn of approx. 90°. If
the circuit breaker is closed, the withdrawable
part cannot be moved any further.
—
7. Maintenance

MEDIUM VOLTAGE PRODUCTS
1919
7.5.2 Checking of interlock conditions
(Figures 9/17 and 9/21)
1. The withdrawable part must only be movable
from the test/disconnected position into the
service position when the circuit breaker is
open .
Check this condition as follows:
- With the circuit breaker closed, insertion of
the withdrawable part towards the service
position must be blocked after only half a
turn of the crank in the clockwise direction
Do not use force – max. torque 25 Nm!
2. The withdrawable part must only be movable
from the service position into the test/
disconnected position with the circuit breaker
open.
Check this condition as follows:
- With the circuit breaker closed, withdrawal
movement of the withdrawable part must be
blocked after only half a turn of the crank in
the anti-clockwise direction.
3. Closing of the circuit breaker must only be
possible when the withdrawable part is in the
defined test/disconnected position or service
position.
The control wiring plug 36.1 must previously
have been inserted.
Check this condition as follows:
- It must not be possible to close the circuit-
breaker with the withdrawable part in any
position between the test/ disconnected
position and the service position.
- Readiness for switching is established
electrically when the service position is
reached by auxiliary switch -BT1 in the
withdrawable assembly switching over.
4. After failure of the power supply, the circuit
breaker may only be operated manually in the
service position or in the test/disconnected
position:
a) Initially by pressing the OFF push-button 4, for
- up to 60 seconds for breaking currents up
to 25 kA.
- up to 120 seconds for breaking currents up
to 31.5 kA.
b) Manual emergency off switching using
operating lever 28 is possible beyond these
times.
5. Withdrawable parts with order-related
blocking magnet -RL2 may not be moved in
case of control power failure, or when there is
no control power. Do not forcibly move blocked
withdrawable parts! The blocking magnet -RL2
is only present on manually operated
withdrawable parts (Figure 9/28).
Releasing the blocking magnet -RL2:
- Remove front plate 1.1,
- Disengage blocking magnet -RL2 by pulling
the magnet armature,
- While doing so, turn crank 38 about one half
turn (either direction of rotation is
permissible).
- The blocking magnet is only active in the test
position and service position. In intermediate
positions it has no effect.
7.6 Spare parts, auxiliary
materials, lubricants
7.6.1 Spare parts
When parts are required, the serial number of the
relevant withdrawable breaker part or circuit
breaker should always be quoted.
Setting instructions are to be requested
separately.
Withdrawable assembly of VM1:
• Manually movable withdrawable assembly :
See Drawing GCE 7003570, Sheets 1 and 2, for
notes for setting of auxiliary switches -BT2/-BT1
and slide blocker.
• Blocking magnet -RL2:
For notes on settings see drawing GCE 7003820,
sheet 1 (table 2)

20
VM1 - INSTRUCTION MANUAL BA 504/05 E
7.6.2 Auxiliary materials and lubricants
Designation Part no.
(order code)
Lubricant:
- Isoflex Topas NB 52 GCE0007249P0100
Halogen-free cleansers:
- Rivolta BWR 210 GCE0007707P0100
(for general cleaning)
- ABB Instruction manual
BA 1002/E GCEA901002P0102
- Cold cleanser 716 GCE0007706P0100
(for use with conductive
components, components
of insulating materials and
in case of serious grime!)
- ABB Instruction manual
BA 1006/E GCEA901006P0102
Paint:
- Touch-up paint:
Standard colour RAL 7035
- 1 kg-box GCE9014060R0103
- Spray tin GCE0007895P0100
Designation Item
no.
Rated supply
voltage
Part no.
(order code)
Auxiliary switch for manually operated
mechanism
- contacts silver plated
- contacts gold plated
Blocking magnet
-BT2/-BT1
-RL2 24V
30V
48V
60V
110V
1 25V
220V
GCE7004024R0101
GCE7004024R0103
GCE7003820R01 01
GCE7003820R010 2
GCE7003820R0103
GCE7003820R010 4
GCE7003820R0105
GCE7003820R010 7
GCE7003820R010 6
Table: VM1 withdrawable part
Designation Item
no.
Part no.
(order code)
Auxiliary switch for ON/OFF
position signalization
- Silver-plated contacts
- Gold-plated contacts
-BB1 /-BB3
GCE7002397R0119
GCE70 02397R01 25
Table: VM1 type circuit breaker
Designation Rated supply voltage Part no.(order code)  
Breaker controller
Power pack A
- Standardversion
- Full version
-24V…48VAC
-24V…60VDC
GCE7004902
GCE7004902
R0120
R0126 R0126
Breaker controller
Power pack B
- Standardversion
- Full version
-100V…240VAC
-110V…240VDC
GCE7004902
GCE7004902
R01 21
R0127 R01 27
—
7. Maintenance