Schaltbau C193 Series User manual

33
Contactors
C193, C294 series
Single- and double pole
NO contactors
Installation and maintenance
instructions
Manual B193-B294-M.en

22019-08-07 / V1.0
Contactors C193/C294 – Installation and Maintenance Instructions
Document Revision History
Date Rev. Level Description Pages
2019-08-07 1.0 First release all
Content
1. Important basic information......................................................................................... 4
1.1 Legal notes .............................................................................................................................. 4
1.2 Conventions for this manual............................................................................................. 4
2. General and security information ................................................................................ 4
2.1 Observing the instructions................................................................................................ 4
2.2 User obligations..................................................................................................................... 5
2.3 Intended use........................................................................................................................... 5
2.4 Ambient conditions.............................................................................................................. 5
3. Dangers and security measures.................................................................................... 6
3.1 Electrical dangers.................................................................................................................. 6
3.2 Other dangers ........................................................................................................................ 6
3.3 Measures for avoiding damages and malfunctions ................................................. 7
4. Product information........................................................................................................ 8
4.1 Contactors of the C193 and C294 series....................................................................... 8
4.2 Special features...................................................................................................................... 8
4.3 Applications ............................................................................................................................ 8
4.4 Technical information and material specication..................................................... 8
4.5 Survey of the C193 and C294 series (stock items)..................................................... 9
C193 series (single pole NO contactors)....................................................................... 9
C294 series (double pole NO contactors)...................................................................10
5. Storage.............................................................................................................................11
6. Unpacking.......................................................................................................................11
6.1 Unpack the device ..............................................................................................................11
6.2 Check parts for transport damage................................................................................11

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2019-08-07 / V1.0 Contactors C193/C294 – Installation and Maintenance Instructions
7. Installation ......................................................................................................................12
7.1 Mechanical installation.....................................................................................................12
Dimensions and further technical specications....................................................12
Preliminaries .........................................................................................................................12
Correct mounting positions............................................................................................13
Required minimum clearance .......................................................................................13
Ventilation requirements .................................................................................................13
Safety.......................................................................................................................................13
Required tools and auxiliaries ........................................................................................13
Install the contactor ...........................................................................................................14
DIN rail mounting (only C193 series) ...........................................................................14
7.2 Electrical installation..........................................................................................................15
Electrical data and further technical specications................................................15
Preliminaries .........................................................................................................................15
Safety.......................................................................................................................................16
Required tools and auxiliaries ........................................................................................16
Connect the auxiliary contact ........................................................................................17
Connect the coil terminals...............................................................................................18
Connect the main contacts .............................................................................................19
7.3 Checks .....................................................................................................................................21
8. Maintenance...................................................................................................................22
8.1 Safety.......................................................................................................................................22
8.2 Preventive maintenance...................................................................................................22
Intervals for regular checks..............................................................................................22
Regular check activities ....................................................................................................23
8.3 Corrective maintenance ...................................................................................................24
Replace the auxiliary contact..........................................................................................24
9. Spare parts......................................................................................................................25
10. Technical data.................................................................................................................25
11. Disposal ...........................................................................................................................25

42019-08-07 / V1.0
Important basic information
Contactors C193/C294 – 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 mechani-
cally reproduced – as a whole or in parts – be distrib-
uted, changed, transmitted, translated into another
language or used in any other way.
Schaltbau GmbH cannot be held liable for damage
caused by not observing (or only partly observing) the
manual.
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 instructions:
DANGER
Indicates a hazardous situation with a high level
of risk which, if not avoided, will result in death or
serious injury.
WARNING
Indicates a hazardous situation with a medium level
of risk which, if not avoided, could result in death or
serious injury.
CAUTION
Indicates a hazardous situation with a low level of
risk which, if not avoided, may result in minor or
moderate injury.
NOTICE
Indicates a hazardous situation which, if not avoided,
may result in property damage, such as service inter-
ruption or damage to equipment or other materials.
Refers to technical features and methods
aimed at facilitating work or to particu-
larly important information.
This manual refers to NO contactors of the following-
types:
-C193 (single pole), C294 (double pole).
-This manual describes only stock items of the above
mentioned contactor types. If you need a special var-
iant feel free to contact us.
2. General and security information
The contactors dealt with in this document are intend-
ed for use with high-voltage systems for special instal-
lations. They are designed and tested in compliance
with the generally recognised state of the art. However,
improper use, operation, handling, maintenance of or
tampering with electric equipment can cause serious
or fatal injury to the user or others, and the appliance or
other property can be damaged.
The operation, maintenance and installation instruc-
tions for the contactors must therefore be strictly fol-
lowed.
Any uncertainties must be claried and all queries must
include details of the type of device and the serial num-
ber.
Only authorized and trained personnel are allowed to
plan and carry out all mechanical and electrical installa-
tions, transport, commissioning, as well as maintenance
and repair work. This applies to the observation of the
general installation and safety regulations for high-volt-
age systems as well as the proper use of tools approved
for this purpose. Electric equipment requires protection
from moisture and dust during installation and storage.
2.1 Observing the instructions
X All sta must read and understand the instructions
in this manual and adhere to them when working
with the device.
X Always carefully observe all safety warnings!

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2019-08-07 / V1.0 Contactors C193/C294 – Installation and Maintenance Instructions
General and security information
2.2 User obligations
X Observe all applicable national provisions, all safe-
ty, accident prevention and environmental regula-
tions as well as the recognized technical rules for
safe and proper working.
X Carry out regular inspections of all protection and
safety devices to see if they work properly.
X Work on electric equipment may only be per-
formed by an expert or trained personnel working
under the direction and supervision of an expert
according to the applicable rules of electrical en-
gineering.
X An expert is a person who can judge and recog-
nise the possible dangers of the jobs commended
to him based on his training, knowledge and ex-
perience and by knowledge of the appropriate
regulations.
X Work on the contactors must only be carried out
by sta who meets the requirements set out in this
manual.
X Sta must be informed clearly about who is re-
sponsible for the maintenance of the contactors.
X After each installation work and/or after any other
modications, alterations or maintenance works,
always perform complete checks according to
these standards:
-IEC 60077-2
-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 variety of applications.
X The contactors must only be used under operating
conditions according to the technical specication
and the instructions in this manual.
X None of the operating conditions dened in the
corresponding data sheets and in our catalogues
B193 and B294 in section “Specications“, such as
voltages, currents, ambient conditions, etc. may
be changed. The catalogues are 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 installed prop-
erly and are fully operational.
X Contactors may not be used without further pro-
tective measures in potentially explosive atmos-
pheres and/or in aggressive media.
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 Do not use the contactor without properly mount-
ed arc chute cover.
X The contactor has unprotected live parts
X The required clearance of live parts to earth and
other parts of the contactor is to be observed as
well as the safety regulations of the applicable
standards.
X Switching at maximum breaking capacity might
require larger clearance! Do not hesitate to ask our
advice for dimensioning.
X Improper handling of the contactors, e.g. when
hitting the oor with some impact, can result in
breakage, cracks and deformation. Always handle
the contactors with care.
X Use the contactor only according to its intended
use. Replace or repair damaged parts exclusively
with original parts. Any other usage of or tamper-
ing with the contactors is considered contrary to
its intended use. No liability is assumed for damag-
es and accidents caused due to non-compliance
with the instructions in this manual or improper
use of the contactors.
2.4 Ambient conditions
NOTICE
The contactors are constructed for specic ambient
conditions.
X Operate the contactors only according to the
ambient conditions, like temperature ranges,
pollution degree, etc., as dened in the cor-
responding data sheets and in our catalogues
B193 and B294. The catalogues are available
under:
https://www.schaltbau.com/en/media-library/

62019-08-07 / V1.0
Dangers and security measures
Contactors C193/C294 – Installation and Maintenance Instructions
3. Dangers and security measures
3.1 Electrical dangers
DANGER
The contactors are used to switch voltage. The touching of electrically conducting parts may result
in serious injuries or even death!
Energized parts are all metal parts belonging directly to one of the circuits or wires leading there. All
other visible metal parts and wires may also be energized in the case of a failure.
Before beginning any work on the contactors, always observe the following safety regulations:
X Disconnect on all sides
X Ensure that it is not possible to reconnect unintentionally
X Clearly mark your work area
X Make sure that there is no voltage present
X Earth and short circuit the installation; this also includes the discharging of any capacitors in
the main circuit
X Besides the main electric circuit, also disconnect additional and auxiliary circuits
X Cover or insulate adjacent energized parts
X Only an electrically skilled person may determine if there is no voltage present
X When the work has been concluded, proceed the other way round.
3.2 Other dangers
WARNING
Exclusively use the contactors for purposes as indicated in the specications and data sheets.
A wrong application can cause accidents and severe damages to persons!
X The manufacturer doesn‘t take the responsibility for accidents which were caused by improper
use of the product.
CAUTION
During continuous operation the contactors may become hot. Risk of burns!
X Before beginning any checks or maintenance work on the contactors make sure that the heat-
ed components have cooled down.
CAUTION
The contactors contain sharp-edged parts. Risk of injury!
X Use appropriate tools for installation and maintenance works on the contactors.
X Wear protective gloves when working with sharp-edged components.

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2019-08-07 / V1.0 Contactors C193/C294 – Installation and Maintenance Instructions
Dangers and security measures
3.3 Measures for avoiding damages and malfunctions
NOTICE
Aggressive uids may damage the contactors.
X Make sure that the contactors are not exposed to aggressive uids.
NOTICE
Improper handling of the contactors, e.g. when hitting the oor with some impact, can result in breakage, cracks
and deformation.
X Make sure that the contactors are always used properly.
X Do not throw the contactors to the oor.
X Regularly sight-check the contactors for potential damages.
X Immediately replace damaged components.
NOTICE
Depending on the product type, contactors can contain strong (permanent) magnets. These magnets can attract
ferromagnetic particles and may damage the contactors.
X Make sure that the contactors are installed at a location, where no ferromagnetic particles can be attracted.
NOTICE
Depending on the product type, contactors can contain strong (permanent) magnets. These magnets can de-
stroy data on credit cards or similar cards.
X Keep credit cards or similar cards away from the contactors..
NOTICE
During the switching o, strong electromagnetic elds are generated in the surroundings of the contactors.
These may inuence other components close to the contactors.
X Make sure that the contactors are installed at a location, where no other components can be aected.
NOTICE
In the case of damage, wear and tear and/or soiling of the contactor components - in the form of a partial break,
sharp edges and discoloured surfaces - the functional safety of the contactors is no longer guaranteed.
X Carry out regular visual checks to detect wear and tear and dirt.
X Immediately replace damaged parts.
X Immediately remove dirt without leaving any residues.
X Immediately replace parts with stubborn dirt.
NOTICE
Detent-edged rings and detent-edged washers have a limited life time. After 3 times opening of screws secured
with detent-edged rings or detent-edged washers, the rings or washers must be replaced by new ones.
X Record the frequency of screw opening in the work log.
X After 3 times opening of screws, replace detent-edged rings or detent-edged washers by new ones..

82019-08-07 / V1.0
Product information
Contactors C193/C294 – Installation and Maintenance Instructions
4. Product information
4.1 Contactors of the C193 and C294
series
Single and double pole high-voltage contactors of
compact design:
Notwithstanding its small size, the contactors feature
an extraordinary switching capacity.
The C193 series contactor is suitable for DC applica-
tions up to 1,000 V.
The C294 series contactor is suitable for DC applica-
tions up to 1,000 V per contact system or 1,500 V when
main contacts connected in series.
Best suited for the harsh environment of public trans-
port, both contactor series have been proven to be
transportation system components of high reliability
which have an electrical life that is above average.
4.2 Special features
X Suitable for years of continuous duty
X Intended for high ambient temperatures
X Compact design
X Double-break contacts
X DC versions with blowout magnets for
arc quenching
X Only for C193 series:
-Versions for AC and DC operation available
-DIN rail mount option
4.3 Applications
Typical applications are to be found in trac engineer-
ing equipment, particularly in heating circuits, air con-
ditioning equipment and conversion
engineering of complex power supplies.
4.4 Technical information and material
specication
For technical information and material specications,
refer to the corresponding data sheets and to our cata-
logues B193 and B294.
The catalogues are available under:
https://www.schaltbau.com/en/media-library/

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2019-08-07 / V1.0 Contactors C193/C294 – Installation and Maintenance Instructions
Product information
4.5 Survey of the C193 and C294 series (stock items)
C193 series (single pole NO contactors)
C
A
B
E
D
A
B
D
F
D
D
G
H
A
J
Fig. 1: C193 series (left: front view, right: rear view)
A Plasma exits
B Permanent magnets (behind cover)
C Main contacts, terminals hexagon head bolts M5
+ load washers, tightening torque: 3 Nm max.
Alternative version: main contact terminals with hexagon
head bolts, inch thread 10-24UNC x 3/8“ + load washers
D Mounting holes for screws M4,
Tightening torque: 2 Nm max.
E Auxiliary contact (S870), Terminals: Flat tabs 6.3 x 0.8 mm
F Coil terminals A1 and A2, Flat tabs 6.3 x 0.8 mm
G Slider for DIN rail mounting (DIN rail 35 mm)
H Varistor (suppressor diode optional)
J Alternative version: Coil terminals with hexagon head
bolts, inch thread 10-24UNC x 5/8“, each with 2hexagon
nuts 10-24UNC + load washers

10 2019-08-07 / V1.0
Product information
Contactors C193/C294 – Installation and Maintenance Instructions
C294 series (double pole NO contactors)
C
A
B
E
D
A
B
D
F
C
D
D
J
H
A
A
Fig. 2: C294 series (left: front view, right: rear view)
A Plasma exits
B Permanent magnets (behind cover)
C Main contacts, terminals hexagon head bolts M5
+ load washers, tightening torque: 3 Nm max.
Alternative version: main contact terminals with hexagon
head bolts, inch thread 10-24UNC x 3/8“ + load washers
D Mounting holes for screws M4,
Tightening torque: 2 Nm max.
E Auxiliary contact (S870), Terminals: Flat tabs 6.3 x 0.8 mm
F Coil terminals A1 and A2, Flat tabs 6.3 x 0.8 mm
H Varistor
J Alternative version: Coil terminals with phillips screws, inch
thread 8-32UNC x 1/4“ + lock washers

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2019-08-07 / V1.0 Contactors C193/C294 – Installation and Maintenance Instructions
Storage
5. Storage
NOTICE
Moisture and dust can damage the contactor. If
the device is to be stored for a prolonged period
of time,
► store it in its original packaging,
► store it in a dry and dust-free location.
Return shipments
Schaltbau recommends to keep the original packing
box for any return shipments. If no original packing box
is available care must be taken to pack the contactor in
a way that prevents damage during shipment.
6. Unpacking
6.1 Unpack 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, falling etc.).
X If any signs indicate that the contactor has been
subject to excessive shock inuence do not install
the contactor.
6.2 Check parts for transport damage
NOTICE
If parts are damaged, the functional reliability of the
contactor is no longer given.
X Before installing, check all parts for any possible
transport damage.
X Do not install a damaged contactor.

12 2019-08-07 / V1.0
Installation
Contactors C193/C294 – Installation and Maintenance Instructions
7. Installation
7.1 Mechanical installation
Dimensions and further technical
specications
The dimensions and further technical specications are
given in the respective data sheets or in our catalogues.
Refer to our catalogues B193 and B294.
The catalogues are available under:
https://www.schaltbau.com/en/media-library/
Preliminaries
X For the fastening of the contactors an appropriate
mounting plate with 4 mounting holes according
to Fig. 3 or Fig. 4 has to be provided.
78.8
M4 or
Ø 4.5
39
max. 2.0
Nm
Fig. 3: C193 series: Dimensions (in mm) and arrangement of
the mounting holes
84
M4 or
Ø 4.5
47
max. 2.0
Nm
Fig. 4: C294 series: Dimensions (in mm) and arrangement of
the mounting holes
X The mounting holes can either be
-threaded holes (for threaded screws)
-or through holes (for threaded screws and nuts).
X The length of the xing screws has to be deter-
mined according to the constructional conditions.
X In order to secure the mounting screws against
self-loosening, appropriate screw locking ele-
ments have to be provided. Schaltbau strongly
recommends Schnorr-Washers (or similar) to se-
cure the screws.
X As an alternative, contactors of the C193 series can
also be installed by means of DIN rail mounting.
See section “DIN rail mounting (only C193 series)“.

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2019-08-07 / V1.0 Contactors C193/C294 – Installation and Maintenance Instructions
Installation
Correct mounting positions
The contactors are designed for horizontal or vertical
mounting positions.
Examples for intended mounting positions are shown
in Fig. 5/(A).
Not permissible are suspended or inverted mounting
position as shown in Fig. 5/(B).
AB
Fig. 5: Examples for intended mounting positions (A) and
not permissible mounting positions (B)
(the gure shows the C193 series, the intended
mounting positions for the C294 series are the same)
Required minimum clearance
NOTICE
Switching electrical currents at high voltages will
produce arcing and plasma may exit out of the arc
chute. It is essential to observe the minimum clear-
ance towards earthed and live parts to avoid the risk
of a ash-over.
X Observe the minimum clearance towards earthed
and live parts to plasma exits! Refer to the dimen-
sion drawings in our catalogues B193 and B294 for
minimum clearance upwards and to all sides.
The catalogues are available under:
https://www.schaltbau.com/en/media-library/
Ventilation requirements
X Ensure sucient ventilation, especially in the case
of heavy arc switching. Allow the exchange of sur-
rounding atmosphere to avoid the risk of ash-
overs and excessive corrosion.
Safety
X The installation has to be carried out by qualied
trained personnel.
NOTICE
During installation, ensure that dirt caused by sur-
rounding construction activities does not get into
the contactor.
NOTICE
Detent-edged rings and detent-edged washers have
a limited life time. After 3 times opening of screws
secured with detent-edged rings or detent-edged
washers, the rings or washers must be replaced by
new ones.
X Record the frequency of screw opening in the
work log.
X After 3 times opening of screws, replace detent-
edged rings or detent-edged washers by new
ones.
Required tools and auxiliaries
-Socket wrench set, hexagon nuts
-Hexagon socket wrench set
-Torque wrench

14 2019-08-07 / V1.0
Installation
Contactors C193/C294 – Installation and Maintenance Instructions
Install the contactor
X Make sure, that the mounting surfaces of mount-
ing plate (5) and contactor (3) are free from dirt
and other contamination (e. g. metal cuttings).
X Place the contactor (3) on the mounting plate (5)
with the prepared mounting holes.
X Screw the contactor (3) with four screws (4) on the
mounting plate (5).
-When using threaded holes: Screw the screws
with appropriate screw locking elements direct-
ly in the threaded holes.
-When using through holes: Fasten the screws
with appropriate screw locking elements and
nuts.
X Then tighten the four screws (4) with the required
torque of 2 Nm max.
5
4
3
max. 2.0
Nm
Fig. 6: Install the contactor to the mounting plate
(the gure shows the C193 series, the procedure for
the C294 series is the same)
DIN rail mounting (only C193 series)
As an alternative, contactors of the C193 series can also
be installed by means of DIN rail mounting. The contac-
tors are prepared accordingly and can be attached and
removed to 35 mm DIN rails by using the slider at the
bottom of the contactor.
X Pull and hold the DIN rail slider (8).
X Attach the contactor with the clamping groove (6)
to the DIN rail (7) or slide it laterally to the rail.
X Press on the contactor gently and release the DIN
rail slider (8).
X Check if the contactor is rmly locked to the DIN
rail (7).
6
8
7
Fig. 7: DIN rail mounting (only C193 series)

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2019-08-07 / V1.0 Contactors C193/C294 – Installation and Maintenance Instructions
Installation
7.2 Electrical installation
Electrical data and further technical
specications
For the power consumption of the magnetic drive sys-
tem and electrical data of the auxiliary switches refer to
the respective data sheets and to our catalogues B193
and B294.
The catalogues are available under:
https://www.schaltbau.com/en/media-library/
Preliminaries
X The connection of the main current circuit can be
done with wires or busbars.
X If wires are used, the wire gauges must be selected
in coordination with their insulation class and the
operating conditions.
X The minimum gauges of the wires/busbars must
be observed. For the required cross sections of
wires/busbars refer to our catalogues B193 and
B294.
The catalogues are available under:
https://www.schaltbau.com/en/media-library//
X The wires of the main current circuit must be t-
ted with appropriate ring cable lugs (for terminal
screws M5).
X The main contact terminals are provided with
press nuts M5.
X Schaltbau recommends Schnorr-Washers (or simi-
lar) to secure the terminal screws against self-loos-
ening.
The terminal screws must be tightened with the
required torque of max. 3 Nm.
X The terminals of the coil and the auxiliary contact
are designed as at tabs. Therefore the control
wires must be tted with appropriate at recep-
tacles for tabs. Depending on the series, the table
shows the type of at receptacles.
Series Auxiliary contact
terminals:
at receptacles for tabs
Coil terminals:
at receptacles
for tabs
C193 6.3 x 0.8 mm
C294 6.3 x 0.8 mm
X The maximum permissible cross section of the
auxiliary contact control cables is 1 mm2/ AWG 18
stranded wire.

16 2019-08-07 / V1.0
Installation
Contactors C193/C294 – Installation and Maintenance Instructions
Safety
DANGER
The contactors are used to switch voltage. The touching of electrically conducting parts may result
in serious injuries or even death!
Energized parts are all metal parts belonging directly to one of the circuits or wires leading there. All
other visible metal parts and wires may also be energized in the case of a failure.
Before beginning any work on the contactors, always observe the following safety regulations:
X Disconnect on all sides
X Ensure that it is not possible to reconnect unintentionally
X Clearly mark your work area
X Make sure that there is no voltage present
X Earth and short circuit the installation; this also includes the discharging of any capacitors in
the main circuit
X Besides the main electric circuit, also disconnect additional and auxiliary circuits
X Cover or insulate adjacent energized parts
X Only an electrically skilled person may determine if there is no voltage present
X When the work has been concluded, proceed the other way round.
NOTICE
Detent-edged rings and detent-edged washers have a limited life time. After 3 times opening of screws secured
with detent-edged rings or detent-edged washers, the rings or washers must be replaced by new ones.
X Record the frequency of screw opening in the work log.
X After 3 times opening of screws, replace detent-edged rings or detent-edged washers by new ones.
Required tools and auxiliaries
-Socket wrench set, hexagon nuts
-Open-end wrench set
-Torque wrench
-Continuity tester
-Cable ties

17
2019-08-07 / V1.0 Contactors C193/C294 – Installation and Maintenance Instructions
Installation
Connect the auxiliary contact
The control wires for the auxiliary contact must be t-
ted with appropriate at receptacles (6.3 x 0.8 mm).
NOTICE
X The maximum permissible cross section of the
auxiliary contact control wires is 1 mm2/ AWG 18
stranded wire.
X Bending of the auxiliary contact terminals is not
permissible!
X Move and lay the control wires and at recep-
tacles only in plugging direction, see Fig. 8 and
Fig. 9.
X Attach the control wires mechanically, in order
to minimize retroactivities (e. g. shock, vibra-
tions) from the wires to the terminals.
X Plug the prepared control wires with the at re-
ceptacles (1) to the terminals (2) of the auxiliary
contact.
X Bundle the control wires with cable ties and x
them to the grommet (3) provided for this pur-
pose.
2
6.3 x 0.8 mm
1
3
Fig. 8: C193 series: Connect the auxiliary contact (S870)
2
6.3 x 0.8 mm
1
3
Fig. 9: C294 series: Connect the auxiliary contact (S870)

18 2019-08-07 / V1.0
Installation
Contactors C193/C294 – Installation and Maintenance Instructions
Connect the coil terminals
The control wires for the coil connection must be tted
with appropriate at receptacles (6.3 x 0.8 mm).
NOTICE
X Bending of the coil terminals is not permissible!
X Move and lay the control wires and at recepta-
cles only in plugging direction, see Fig. 10 and
Fig. 11.
X Attach the control wires mechanically, in order
to minimize retroactivities (e. g. shock, vibra-
tions) from the wires to the terminals.
X Plug the prepared control wires with the at re-
ceptacles (4) to both coil terminals A1 and A2 (5).
6.3 x 0.8 mm
5
4
Fig. 10: C193 series: Connect the coil terminals
6.3 x 0.8 mm
5
4
Fig. 11: C294 series: Connect the coil terminals

19
2019-08-07 / V1.0 Contactors C193/C294 – Installation and Maintenance Instructions
Installation
Connect the main contacts
NOTICE
Make sure, that the connection points of the main
contacts are free from corrosion.
Main contact connection with wires
The wires of the main current circuit must be tted with
appropriate ring cable lugs (for terminal screws M5).
Examples for the connection with busbars are shown in
Fig. 12 and Fig. 13.
X Lay the prepared wires (3) to both main contacts
(1).
X Put the ring cable lugs (2) on the main contacts (1).
X Screw the ring cable lugs (2) with the terminal
screws (4) and washers (5) on the main contacts
(1).
-Schaltbau recommends Schnorr-Washers (or
similar) to secure the terminal screws.
X Tighten the terminal screws (4) with the required
torque of 3 Nm max.
1
2
4
5
3
max. 3.0
Nm
Fig. 12: C193 series: Connect the main contacts (Example for
the connection with wires)
max. 3.0
Nm
max. 3.0
Nm
1
2
4
5
3
1
2
5
4
3
Fig. 13: C294 series: Connect the main contacts (Example for
the connection with wires)

20 2019-08-07 / V1.0
Installation
Contactors C193/C294 – Installation and Maintenance Instructions
Main contact connection with busbars
As an alternative to the connection with wires, the main
current circuit can also be connected with busbars.
Examples for the connection with busbars are shown in
Fig. 14 to Fig. 16.
X Lay the busbars (7) to the main contacts (1).
X Depending on the installation situation, use ad-
ditional connecting bars (6) or angled connecting
bars (8) if necessary.
X Connect the busbars (7) to the connecting bars
(6) or angled connecting bars (8) using approriate
screws and washers.
-Schaltbau recommends Schnorr-Washers (or
similar) to secure the screws.
X Connect the connecting bars (6) or angled con-
necting bars (8) to the main terminals (1) using the
terminal screws (4) and washers (5).
-Schaltbau recommends Schnorr-Washers (or
similar) to secure the screws.
X Tighten the terminal screws (4) with the required
torque of 3 Nm max.
4
5
max. 3.0
Nm
6
1
7
Fig. 14: C193 series: Connect the main contacts (Example
for the connection with busbars (7) and connecting
bars(6))
4
5
max. 3.0
Nm
8
1
7
Fig. 15: C193 series: Connect the main contacts (Example for
the connection with busbars (7) and angled connect-
ing bars (8))
max. 3.0
Nm
max. 3.0
Nm
1
76
7
6
5
4
5
4
1
Fig. 16: C294 series: Connect the main contacts (Example
for the connection with busbars (7) and connecting
bars(6))