Schaltbau C195 Series User manual

33
Contactors
C195 series
Single pole
compact universal
NO and CO contactors
Installation and maintenance
instructions
Manual B195-M.en

22021-02-10 / V1.0
Contactors C195 Series – Installation and Maintenance Instructions
Content
1. Important basic information......................................................................................... 4
1.1 Legal notes............................................................................................................................. 4
1.2 Conventions for this manual............................................................................................ 4
2. General and safety information.................................................................................... 4
2.1 Observing the manual ....................................................................................................... 4
2.2 Duties of the operating company.................................................................................. 5
2.3 Intended use.......................................................................................................................... 5
2.4 Ambient conditions ............................................................................................................ 5
3. Hazards and safety precautions.................................................................................... 6
3.1 Electrical hazards ................................................................................................................. 6
3.2 Other hazards........................................................................................................................ 6
3.3 Measures for avoiding damage and malfunctions.................................................. 7
4. Product information........................................................................................................ 8
4.1 C195 Series – Single pole NO and changeover contactors
plus bidirectional variants ................................................................................................ 8
4.2 Features................................................................................................................................... 8
4.3 Applications........................................................................................................................... 8
4.4 Technical information and material properties ........................................................ 8
4.5 Overview (stock items) ...................................................................................................... 9
5. Storage.............................................................................................................................17
6. Unpacking.......................................................................................................................17
6.1 Unpacking the device ......................................................................................................17
6.2 Check parts for transport damage...............................................................................17
7. Installation ......................................................................................................................18
7.1 Mounting ..............................................................................................................................18
7.1.1 Dimensions/interfaces and further technical specications .............................18
7.1.2 Preparatory measures ......................................................................................................18
7.1.3 Mounting positions...........................................................................................................19
7.1.4 Required minimum clearances.....................................................................................19
7.1.5 Ventilation requirements ................................................................................................19
7.1.6 Safety......................................................................................................................................19
7.1.7 Tools required......................................................................................................................19
7.1.8 Installing the contactor ...................................................................................................20
7.2 Electrical connection ........................................................................................................21
7.2.1 Electrical data and other technical specications..................................................21
7.2.2 Preparatory measures ......................................................................................................21
7.2.3 Safety......................................................................................................................................22
7.2.4 Tools required......................................................................................................................22
Document Revision History
Date Rev. version Description Pages
2021-02-10 1.0 First release All

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2021-02-10 / V1.0 Contactors C195 Series – Installation and Maintenance Instructions
7.2.5 Connecting the auxiliary switches...............................................................................23
Auxiliary switches at latching contactor variants...................................................24
7.2.6 Connecting the coil...........................................................................................................25
Coil connections at latching contactor variants.....................................................26
7.2.7 Connecting the main contacts......................................................................................27
Main contact connection with cables ........................................................................27
Main contact connection with busbars .....................................................................29
7.3 Connecting the earth terminal (only for C195 X/) .................................................31
7.4 Checks....................................................................................................................................31
8. Maintenance...................................................................................................................32
8.1 Safety......................................................................................................................................32
8.2 Preventive maintenance .................................................................................................32
8.2.1 Intervals for regular tests/checks .................................................................................32
8.2.2 Regular tests/checks.........................................................................................................33
8.3 Corrective maintenance measures – type C195 X/................................................35
8.3.1 Preparatory disassembly/assembly steps – type C195 X ....................................35
Disassembling/assembling the pole packs – TypC195 X/..................................35
Removing/inserting the pole plates – typeC195 X/.............................................36
Disassembling/assembling the contact unit – typeC195 X/.............................36
Disassembling/assembling the armature – TypC195 X/ ......................................37
Removing/attaching the cover – typeC195X/.......................................................38
Disassembling/assembling the connecting plate – typeC195X/...................38
Disassembling/assembling the contact bridge unit – typeC195X/...............39
8.3.2 Replacing the auxiliary switches – typeC195X/....................................................40
8.3.3 Replacing the complete contact unit – type C195 X/...........................................41
8.3.4 Replacing the magnetic drive – typeC195X/.........................................................42
8.3.5 Replacing the arcing chambers – typeC195X/......................................................42
8.3.6 Replacing the contact bridge unit – typeC195X/ .................................................43
8.3.7 Replacing the main contacts – typeC195X/...........................................................44
8.4 Corrective maintenance measures – typeC195A/, B/, S/, T/, W/......................46
8.4.1 Preparatory disassembly/assembly steps – typeC195A/, B/, S/, T/, W/.........46
Disassembling/assembling the contact unit – typeC195A/, B/, S/, T/, W/...46
Disassembling/assembling the armature – typeC195A/, B/, S/, T/, W/ ..........48
Removing/attaching the cover – typeC195A/, B/, S/, T/, W/.............................50
Disassembling/assembling the contact bridge unit –
typeC195A/, B/, S/, T/, W/ ..............................................................................................51
8.4.2 Replacing the auxiliary switches – typeC195A/, B/, S/, T/ .................................52
Auxiliary switches for latching contactor types......................................................53
8.4.3 Replacing the complete contact unit – type C195A/, B/, S/, T/, W/.................54
8.4.4 Replacing the magnetic drive – typeC195A/, B/, S/, T/, W/...............................55
8.4.5 Replacing the arcing chamber – typeC195A/ und C195B/..............................56
8.4.6 Replacing the contact bridge unit – typeC195A/, B/, S/, T/, W/ .......................57
8.4.7 Replacing the main contacts – typeC195A/, B/, S/, T/, W/.................................58
9. Spare parts......................................................................................................................60
10. Technical data.................................................................................................................61
11. Disposal ...........................................................................................................................61

42021-02-10 / V1.0
Important basic information
Contactors C195 Series – Installation and Maintenance Instructions
1. Important basic information
1.1 Legal notes
Without prior written consent of SCHALTBAU GmbH,
this manual is not allowed to be electronically or me-
chanically reproduced – as a whole or in parts – be dis-
tributed, changed, transmitted, translated into another
language or used in any other way.
SCHALTBAUGmbH cannot be held liable for damage
caused by non- or only partial observation of the man-
ual.
1.2 Conventions for this manual
This manual describes the installation and maintenance
of the contactors.
Cross references are presented in bold italics.
To highlight particularly important safety instructions
and other information, the following symbols are used
in this manual:
DANGER
Indicates a directly threatening dangerous situation.
Death or severe injuries will result if it is not prevent-
ed.
WARNING
Indicates a possibly dangerous situation. Death or
severe injuries may result if it is not prevented.
CAUTION
Indicates a possibly dangerous situation. Medium or
minor injuries may result if it is not prevented.
ATTENTION
Indicates a possibly detrimental situation. If it is not
prevented, assemblies, the system or property in its
surroundings could be damaged.
Indicates technical features and methods
to simplify working or indicates informa-
tion of particular importance.
This manual describes single pole NO and changeover
contactors of the C195 series.
This manual describes only stock items of the above
mentioned contactor types. If you need a special vari-
ant feel free to contact us.
2. General and safety information
The contactors dealt with in this document are intend-
ed for use with electrical systems for special applica-
tions. They are designed and tested in compliance with
generally accepted codes of practice. However, improp-
er use, operation, handling, maintenance of or tamper-
ing with electric equipment can cause serious or fatal
injury to the user or others, and the appliance or other
property can be damaged. Consequently, the opera-
tion, maintenance and installation instructions for the
contactors must be strictly followed.
If anything is not clear, clarication must be sought
with any queries stating the device type and the serial
number.
Only authorised and trained personnel are allowed to
plan and carry out all mechanical and electrical instal-
lations, transport, commissioning, as well as mainte-
nance and repair work.
This applies to the observation of the general installa-
tion and safety regulations for electrical systems as well
as the proper use of tools approved for this purpose.
Electrical equipment requires protection from moisture
and dust during installation, operation and storage.
2.1 Observing the manual
X All personnel must read and understand the in-
structions in this manual and adhere to them
when working with the device.
X Always adhere strictly to all safety instructions!

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2021-02-10 / V1.0 Contactors C195 Series – Installation and Maintenance Instructions
General and safety information
2.2 Duties of the operating company
X Observe all applicable national regulations, all
safety, accident prevention and environmental
protection regulations as well as the recognised
technical rules for safe and correct working.
X Regularly check all tted protection and safety
equipment for correct function.
X Work on electrical equipment must only be car-
ried out by a qualied electrician or by instructed
persons under the supervision and control of a
qualied electrician in accordance with electrical
regulations.
X A specialist is someone who, on the basis of their
technical training, knowledge and experience as
well as knowledge of the relevant regulations,
is able to assess the work assigned to them and
identify possible dangers.
X Work on the contactors must only be carried out
by personnel who meet the requirements set out
in this manual.
X Personnel must be clearly informed about who is
responsible for the maintenance of the contactors.
X Always perform complete checks after any instal-
lation work and/or after any other conversions, al-
terations or maintenance, in accordance with the
following standards:
-EN/IEC 60077-2
-EN/IEC 60947-4-1
2.3 Intended use
X The contactors have been designed and tested ac-
cording to national and international standards.
Due to their unique features they can also be used
in a wide range of industrial applications.
X The contactors must only be used under operat-
ing conditions according to the technical speci-
cations and the instructions in this manual.
X None of the conditions of use, such as voltages,
currents or ambient conditions, dened in the cor-
responding technical data sheets or in our B195
catalogue may be overridden. The catalogue is
available under:
https://www.schaltbau.com/en/media-library/
X The contactors may only be used when all protec-
tive devices are present, have been correctly in-
stalled and are fully operational.
X Contactors may not be used without other safety
precautions in potentially explosive atmospheres
and/or in aggressive media.
X The switching device meets the requirements
of basic insulation. Make sure the frame or plate
onto which the drive of the contactor is mounted
is earthed in a shock and vibration resistant way.
X Coil suppression for reducing surges when the coil
is switched o is optimally attuned to the contac-
tor‘s switching behaviour. The existing opening
characteristic must not be negatively inuenced
by parallel connection with an external diode.
X The device contains unprotected live parts.
X The prescribed clearances relative to other live
parts or earth and other parts must be complied
with as well as the safety regulations of the appli-
cable standards.
X Switching at close to the maximum breaking ca-
pacity may require increased minimum clearanc-
es! Do not hesitate to ask our advice in respect of
any dimensioning.
X Improper handling of the contactors, e.g. impacts
on the oor, may result in breakage, cracks or de-
formation. Always handle the device with care.
X Only use the contactors for the specied applica-
tion and only with original parts. Any other usage
of or tampering with the contactors is considered
contrary to their intended use. No liability is as-
sumed for damages and accidents caused due to
non-compliance with the instructions in this man-
ual or improper use of the contactors.
2.4 Ambient conditions
ATTENTION
The contactors have been designed for specic am-
bient conditions.
X Only operate the contactors in ambient condi-
tions, such as temperature ranges, degree of
soiling, etc., as dened in the corresponding
data sheets and in our catalogue B195. The cat-
alogue is available under:
https://www.schaltbau.com/en/media-library/

62021-02-10 / V1.0
Hazards and safety precautions
Contactors C195 Series – Installation and Maintenance Instructions
3. Hazards and safety precautions
3.1 Electrical hazards
DANGER
The contactors are used for high voltage switching. Contact with live electrical parts can result in
serious injuries or even death!
Live parts are all metal parts belonging directly to one of the circuits or wires connecting to them.
All other visible metal parts and wiring may also be live if a fault exists.
Before starting any work on the contactors, always comply with the following safety rules:
X Disconnect on all sides
X Secure to prevent switching back on
X Clearly identify the working area
X Check that a voltage-free state exists
X Earth and short circuit; this includes discharging any capacitors in the main circuit
X Besides the main power circuits, also disconnect additional and auxiliary circuits
X Cover or insulate adjacent live parts
X The presence of a voltage-free state can only be clearly identied by a qualied electrician.
X When the work has been concluded, follow the procedure in reverse.
3.2 Other hazards
WARNING
Contactors must only be used for the purposes specied in the specications and data sheets. Incor-
rect use can cause accidents and severe personal injury.
X The manufacturer will not be responsible for accidents arising from improper use of the product.
CAUTION
During continuous operation the contactors may become hot. Risk of burns!
X Before beginning any checks or maintenance on the contactors ensure that the heated com-
ponents have cooled down.
CAUTION
The contactors contain sharp-edged parts. Risk of injuries!
X Use appropriate tools for installation and maintenance work on the contactors.
X Wear safety gloves when handling sharp-edged components.

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2021-02-10 / V1.0 Contactors C195 Series – Installation and Maintenance Instructions
Hazards and safety precautions
3.3 Measures for avoiding damage and malfunctions
ATTENTION
Aggressive liquids may damage the contactors.
X Ensure the contactors do not come into contact with aggressive liquids.
ATTENTION
Improper handling of the contactors, e.g. dropping on the oor, can result in breaks, cracks and deformation.
X Ensure the contactors are always handled correctly.
X Do not throw the contactors on the oor.
X At regular intervals perform a visual check of the contactors for possible damage.
X Immediately replace any damaged parts.
ATTENTION
Depending on the product type, contactors can contain permanent magnets. Such magnets can attract ferro-
magnetic parts resulting in damage to the contactors.
X Ensure that the contactors are installed in a location where it is not possible for them to attract any ferro-
magnetic parts.
ATTENTION
Depending on the product type, contactors can contain permanent magnets. These permanent magnets can
destroy the data on the magnetic strips of credit or similar cards.
X Keep credit or similar cards away from the contactors.
ATTENTION
During switching o, strong electromagnetic elds are generated in the vicinity of the contactors. These may
inuence other components close to the contactors.
X Make sure that the contactors are installed in a location where no other components are aected.
ATTENTION
In the case of damage, wear and/or soiling of the contactors - in the form of a partial break, sharp edges and
discoloured surfaces - the functional reliability of the contactors is no longer ensured.
X Visually inspect the contactors regularly to detect wear and soiling.
X Replace damaged parts immediately.
X Immediately remove any soiling without leaving any residues.
X Immediately replace any parts with persistent soiling.
ATTENTION
Detent-edged rings and detent-edged washers have a limited life time. After screws secured with detent-edged
rings or detent-edged washers have been undone three times, the rings or washers must be replaced by new
ones.
X Record the frequency of undoing of the screws in the work log.
X Replace detent-edged rings or detent-edged washers with new ones after the screws have been undone
three times.

82021-02-10 / V1.0
Product information
Contactors C195 Series – Installation and Maintenance Instructions
4. Product information
4.1 C195 Series – Single pole NO
and changeover contactors plus
bidirectional variants
Compact universal contactors for battery voltages
up to 220 V and high voltages up to 1,500 V
Being of compact size and featuring double-break con-
tacts that are covered for the most part, the C195 Series
contactors provide highperformance current breaking.
Depending on the version you choose C195 series con-
tactors come with blowouts and/or arc chutes.
The coils are tted as standard with varistors for limit-
ing surge voltages. For coil terminal connections you
do not need to observe polarity.
With the C195 X there is also a bidirectional version,
for which the direction of the current is irrelevant, as
required for battery storage systems of public utilities.
And with 320 A, the C195 X is also characterised by a
higher current-carrying capacity.
In addition to that, there is the option of a SPDT version
of the C195 series contactor which has an added gal-
vanically isolated NC contact.
4.2 Features
X Compact universal contactors up to 1,500 V
X Unidirectional, bidirectional and latching contac-
tor variants
X Broad range of possible applications
X Suitable for years of continuous operation
X Intended for high ambient temperatures
X Double-break contacts that are covered for the
most part
X Versions for AC and DC operation available
X DC versions coming with magnetic blowout
X Extended coil tolerance according to railway stan-
dard
4.3 Applications
The contactors are typically used:
-for trac engineering equipment, particularly in
heating circuits and for air conditioning (HVAC
equipment)
-as line contactor in mainline AC and DC rail net-
works– or in combination with a precharging con-
tactor for a host of applications in trains, multiple
units, rail cars and light rail vehicles
-for central inverters of complex power supplies
-for battery storage systems of utilities, specically in
grid stabilisation where bidirectional switching is a
requirement
4.4 Technical information and material
properties
For technical information and material properties, refer
to the corresponding data sheets and to our B195 cata-
logue. The catalogue is available under:
https://www.schaltbau.com/en/media-library/

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2021-02-10 / V1.0 Contactors C195 Series – Installation and Maintenance Instructions
Product information
4.5 Overview (stock items)
4.5.1 C195 X/ (Single pole NO AC / DC contactor, bidirectional)
B
F
B
D
D
A
II
G
EE
H
CC
Fig. 1: C195 X/ (left: view from front, right: view from behind)
A Auxiliary switches (2x S870): at plug connections 6.3x0.8mm
B Arch chambers
C Plasma-exits
D Permanent magnets
E Fastening holes for M8 screws
F Earthing connection M5, torque: 2.4-3 Nm
G Coil terminals A1 and A2, at plug connections 6.3x0.8mm
H Coil suppression: Varistor
I Main contacts, connection M8, torque: 8-10 Nm

10 2021-02-10 / V1.0
Product information
Contactors C195 Series – Installation and Maintenance Instructions
4.5.2 C195 A/ (Single pole NO contactor, unidirectional DC)
B
A
H
E
G
I
E
C
D
Fig. 2: C195 A/ (left: view from front, right: view from behind)
A Auxiliary switches (2x S870): at plug connections 6.3x0.8mm
B Arch chamber
C Plasma-exits
D Permanent magnet (inside the housing)
E Fastening holes for M6 screws
G Coil terminals A1 and A2, at plug connections 6.3x0.8mm
H Coil suppression: Varistor
I Main contacts, connection M8, torque: 9.5-12 Nm

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2021-02-10 / V1.0 Contactors C195 Series – Installation and Maintenance Instructions
Product information
4.5.3 C195 A/ ...BD (Single pole NO latching contactor, unidirectional DC)
B
E
G
I
E
C
D
A
J
AJ
Fig. 3: C195 A/ ...BD (left: view from front, right: view from behind)
A Auxiliary switch (1x S870) for customer use: at plug connections 6.3x0.8mm
B Arch chamber
C Plasma-exits
D Permanent magnet (inside the housing)
E Fastening holes for M6 screws
G Coil terminals A1 and A2, at plug connections 6.3x0.8mm
I Main contacts, connection M8, torque: 9.5-12 Nm
J Auxiliary switch (1x S870 W1B1 a 065) for board switching (hard-wired)

12 2021-02-10 / V1.0
Product information
Contactors C195 Series – Installation and Maintenance Instructions
4.5.4 C195 B/ (Single pole NO contactor AC)
B
A
H
E
G
I
E
C
Fig. 4: C195 B/ (left: view from front, right: view from behind)
A Auxiliary switches (2x S870), at plug connections 6.3x0.8mm
B Arch chamber
C Plasma-exits
E Fastening holes for M6 screws
G Coil terminals A1 and A2, at plug connections 6.3x0.8mm
H Coil suppression: Varistor
I Main contacts, connection M8, torque: 9.5-12 Nm

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2021-02-10 / V1.0 Contactors C195 Series – Installation and Maintenance Instructions
Product information
4.5.5 C195 S/ (Single pole NO contactor DC, unidirectional)
D
A
H
E
G
I
E
C
D
Fig. 5: C195 S/ (left: view from front, right: view from behind)
A Auxiliary switches (2x S870), at plug connections 6.3x0.8mm
C Plasma-exits
D Permanent magnets (inside the housing)
E Fastening holes for M6 screws
G Coil terminals A1 and A2, at plug connections 6.3x0.8mm
H Coil suppression: Varistor
I Main contacts, connection M8, torque: 9.5-12 Nm

14 2021-02-10 / V1.0
Product information
Contactors C195 Series – Installation and Maintenance Instructions
4.5.6 C195 S/ ...BD (Single pole NO latching contactor, unidirectional DC
D
A
E
G
I
E
C
D
JJ
A
Fig. 6: C195 S/ ...BD (left: view from front, right: view from behind)
A Auxiliary switch (1x S870) for customer use: at plug connections 6.3x0.8mm
C Plasma-exits
D Permanent magnet (inside the housing)
E Fastening holes for M6 screws
G Coil terminals A1 and A2, at plug connections 6.3x0.8mm
I Main contacts, connection M8, torque: 9.5-12 Nm
J Auxiliary switch (1x S870 W1B1 a 065) for board switching (hard-wired)

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2021-02-10 / V1.0 Contactors C195 Series – Installation and Maintenance Instructions
Product information
4.5.7 C195 T/ (Single pole NO contactor AC)
A
H
E
G
I
E
C
Fig. 7: C195 T/ (left: view from front, right: view from behind)
A Auxiliary switches (2x S870): at plug connections 6.3x0.8mm
C Plasma-exits
E Fastening holes for M6 screws
G Coil terminals A1 and A2, at plug connections 6.3x0.8mm
H Coil suppression: Varistor
I Main contacts, connection M8, torque: 9.5-12 Nm

16 2021-02-10 / V1.0
Product information
Contactors C195 Series – Installation and Maintenance Instructions
4.5.8 C195 W/ (Single pole changeover (SPDT) contactor, unidirectional DC)
D
H
E
G
I
E
C
D
K
D
D
Fig. 8: C195 W/ (left: view from front, right: view from behind)
C Plasma-exits
D Permanent magnets (partly inside the housing)
E Fastening holes for M6 screws
G Coil terminals A1 and A2, at plug connections 6.3x0.8mm
H Coil suppression: Varistor
I Main contacts NO (normally opened), connection M8, torque: 9.5-12 Nm
K Main contacts NC (normally closed), connection M8, torque: 4.8-6 Nm

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2021-02-10 / V1.0 Contactors C195 Series – Installation and Maintenance Instructions
Storage
5. Storage
ATTENTION
Moisture and dust can damage the contactors. If the
device is to be stored for a prolonged period of time:
X Store the device in its original packaging,
X Store the device in a dry and dust-free location
Return shipments
Schaltbau recommends retaining the original packag-
ing for any return shipments.
If the original packaging is not available, care must be
taken to pack the contactor in a way that prevents dam-
age during shipment.
6. Unpacking
6.1 Unpacking the device
X Before opening the packaging, perform a visual
inspection for any signs that could indicate dam-
age having occurred during transport (impacts,
bumps, dropping, etc.).
X If any signs indicate that the contactor has been
subject to excessive impacts do not install it.
6.2 Check parts for transport damage
ATTENTION
If parts are damaged, functional reliability of the con-
tactor has been lost.
X Before installing, check all parts for possible
transport damage.
X Do not install damaged parts.

18 2021-02-10 / V1.0
Installation
Contactors C195 Series – Installation and Maintenance Instructions
7. Installation
7.1 Mounting
7.1.1 Dimensions/interfaces and further
technical specications
The dimensions and other technical specications are
given in the respective data sheets or can be found in
our B195 catalogue. The catalogue is available under:
https://www.schaltbau.com/en/media-library/
7.1.2 Preparatory measures
X A suitable mounting plate or frame must be pro-
vided for fastening of the contactors. These must
be suciently stable to support the weight of
the contactors under the expected vibration and
shock conditions.
X Mounting holes must be prepared on the mount-
ing plate or frame according to the following di-
mensional drawings (Fig. 9 to Fig. 11).
Ø
9 or M8
Ø
9 or M8
182±0.2
[mm]
Fig. 9: C195 X:/ Dimensions and layout of mounting holes
20
128 ±0.2
2x Ø
6.6 or M6
[mm]
Ø
6.6 or M6
Fig. 10: C195 A/, C195 B/: Dimensions and layout of mounting
holes
Ø 6.6 or M6
93
Ø 6.6 or M6
[mm]
Fig. 11: C195 S/, C195 T/, C195 W/: Dimensions and layout of
mounting holes
X The mounting holes can be either:
-threaded holes (for threaded screws)
-or through holes (for threaded screws and nuts)
X The size and number of mounting screws depend-
ing on the type of contactor can be found in the
table under “7.1.8 Installing the contactor” on
page 20.
X The length of the mounting screws must be deter-
mined dependent on the structural circumstances.

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2021-02-10 / V1.0 Contactors C195 Series – Installation and Maintenance Instructions
Installation
X To secure the mounting screws so that they do not
come loose, appropriate screw locking elements
must be provided. Schaltbau recommends using
Schnorr washers (or similar).
X The mounting screws must be tightened to the
specied torque, which depends on the strength
class (min. 8.8) of the screws/nuts used.
7.1.3 Mounting positions
The contactors can be mounted in almost any position
on the prepared mounting plate or on the mounting
frame.
Examples of intended installation positions are shown
in Fig. 12.
Installation positions hanging, with mounting plate/
frame on top, as shown in Fig. 13, are not permissible.
360°
±90°
±90°
C195 X/ C195 A/
C195 A/ ...BD
C195 B/
C195 S/
C195 S/ ...BD
C195 T/
C195 W/
Fig. 12: Examples of intended mounting positions
±90°
±90°
C195 X/ C195 A/
C195 A/ ...BD
C195 B/
C195 S/
C195 S/ ...BD
C195 T/
C195 W/
Fig. 13: Examples of non-permissible mounting positions
7.1.4 Required minimum clearances
ATTENTION
Switching of high voltage currents produces electric
arcs and it is possible that plasma will escape from
the openings of the arc chambers.
Therefore, it is extremely important to maintain the
minimum clearances to ground/earth and the bus-
bars to avoid ashovers.
X The required minimum clearances to all sides and
above the contactor can be found in our B195 cat-
alogue. The catalogue is available under:
https://www.schaltbau.com/en/media-library/
7.1.5 Ventilation requirements
X Ensure sucient ventilation in the installation area,
especially when switching heavy loads. This allows
the plasma to be dissipated more quickly and re-
duces the risk of ashover and corrosion.
7.1.6 Safety
X Installation must be performed by qualied
trained personnel.
ATTENTION
When installing, ensure that no dirt can get into the
contactor as a result of surrounding building activi-
ties.
ATTENTION
Detent-edged rings and detent-edged washers have
a limited life time. After screws secured with detent-
edged rings or detent-edged washers have been
undone three times, the rings or washers must be
replaced by new ones.
X Record the frequency of undoing of the screws
in the work log.
X Replace detent-edged rings or detent-edged
washers with new ones after the screws have
been undone three times.
7.1.7 Tools required
-Socket spanner set, hexagon nuts, set of hexagon
socket spanners
-Torque spanner

20 2021-02-10 / V1.0
Installation
Contactors C195 Series – Installation and Maintenance Instructions
7.1.8 Installing the contactor
X Ensure that the contact surfaces on the mounting
plate (3) or frame and the bottom of the contac-
tor are free from dirt and other contamination (e.g.
metal chips).
X Position the contactor (1) on the mounting plate/
frame (3) which is provided with mounting holes.
X Screw the contactor (1) on the mounting ange
to the mounting plate/frame (3) using mounting
screws (2) according to the table below.
-In designs with the mounting holes imple-
mented as threaded holes, screw the mounting
screws into the holes directly, not forgetting the
suitable screw locking elements.
-In designs with through holes, t the mounting
screws and suitable screw locking elements (on
both sides) and tighten the screws using nuts.
X Tighten the mounting screws to the specied
torque, which depends on the strength class (min.
8.8) of the screws/nuts used.
Type Mounting screws No. of screws
C195 X/ M8 2
C195 A/ M6 3
C195 B/ M6 3
C195 S/ M6 2
C195 T/ M6 2
C195 W/ M6 2
3
2
1
Nm
M8 2
Nm
M8
Fig. 14: C195 X/: Installing the contactor on the mounting
plate or frame
3
2
1
Nm
2 x M6
2
Nm
M6
Fig. 15: C195 A/: Installing the contactor on the mounting
plate or frame (the gure shows C195 A, the proce-
dure is identical for C195 B/)
3
2
1
Nm
M6
2
Nm
M6
Fig. 16: C195 T/: Installing the contactor on the mounting
plate or frame (the gure shows C195 T, the procedure
is identical for C195 S/)
3
2
1
Nm
M6
2
Nm
M6
Fig. 17: C195 W/: Installing the contactor on the mounting
plate or frame