Operating
Instructions
Autotransformer MW 1700, MW 2200, TT
1700, TT 2200
Operating Instructions
EN
42,0426,0037,EN 003-27092022
Contents
General 4
Machine concept 4
Controls and connections 4
Before commissioning 5
Safety 5
Required connection cables 5
Mounting the connection cables 6
Fitting the connection cable to the autotransformer 6
Mounting a plug on the mains cable 7
Final check 7
Start-up 8
Safety 8
Mounting the fixing brackets to the trolley 8
Mounting the system components on the trolley 9
Putting the unit into service 9
Care, maintenance and disposal 10
Safety 10
At every start-up 10
Every 6 months 11
Disposal 11
Troubleshooting 12
Safety 12
Troubleshooting 13
Technical data 15
Safety 15
MW/TT 1700/2200 auto-transformer 15
EN
3
General
(1)
(3)(2)
Machine concept The digital family of machines provides tremendous flexibility and easy adaptab-
ility to many varied tasks. The reasons for these welcome characteristics may be
found not only in the modular product design, but also in the scope that the system gives for troublefree system extensions. Among other things, features such
as their high-grade componentry, protective plastic surround and powder-coated
aluminium housing ensure that these units are highly reliable and durable.
The MW/TT 1700/2200 auto-transformer was specially designed to meet the requirements of the digital family of machines and can be used with MW
1700/2200 and TT 1700/2200 power sources. It makes it possible for digital
power sources to be run on mains voltages of 460 V as well.
Controls and
connections
Front of auto-transformer
(1) Mains switch
for switching all system components of the welding set on and off centrally
(2) Strain relief device for the power source
for leading-through the connection cable to the power source
(3) Strain relief device for the auto-transformer
for leading-through the mains cable
Rear of auto-transformer
4
Before commissioning
EN
Safety
WARNING!
Danger from incorrect operation and work that is not carried out properly.
This can result in serious personal injury and damage to property.
All the work and functions described in this document must only be carried
▶
out by technically trained and qualified personnel.
Read and understand this document in full.
▶
Read and understand all safety rules and user documentation for this device
▶
and all system components.
WARNING!
Danger from electrical current.
This can result in serious personal injury and damage to property.
Before starting work, switch off all devices and components involved and dis-
▶
connect them from the grid.
Secure all devices and components involved so they cannot be switched back
▶
on.
After opening the device, use a suitable measuring instrument to check that
▶
electrically charged components (such as capacitors) have been discharged.
WARNING!
Required connection cables
Danger from electric current due to defective system components and incorrect operation.
This can result in serious personal injury and damage to property.
All cables, leads and hosepacks must always be securely connected, undam-
▶
aged and correctly insulated.
Only use adequately dimensioned cables, leads and hosepacks.
▶
WARNING!
Danger due to insufficient ground conductor connection.
This can result in serious personal injury and damage to property.
The housing screws provide a suitable ground conductor connection for
▶
grounding the housing.
The housing screws must not under any circumstances be replaced by other
▶
screws without a reliable ground conductor connection.
Power source 3x AWG12, 3.31mm² (.1304 in.) 43,0004,1993
Auto transformer 3x AWG12, 3.31mm² (.1304 in.) 43,0004,1993
5
Mounting the
7
Mains cable
“INPUT 50/60 Hz”
Power source
“OUTPUT 50/60 Hz”
PE 460V 460V 230V 230V PE
connection
cables
The following strain relief devices are included in the scope of supply of the autotransformer:
Strain relief device for the MW/TT 1700/2200 power source, for 3xAWG12
-
connection cable
Strain relief device for the MW/TT 1700/2200 auto-transformer, for 3x-
-
AWG12 connection cable
Carry out the following steps for both the power-source connection cable and
the connection cable for the auto-transformer.
Shift the mains switch on the auto-transformer into the “0” position
1
Unplug the unit from the mains or otherwise disconnect the mains power
2
supply
Take the cover off the auto-transformer
3
Strip off the insulation from approx. 170 mm (6.7 in.) of the end of the con-
4
nection cable
Fit a wire-end ferrule to the PE
5
conductor
Shorten the phase conductors to
6
approx. 150 mm (5.9 in.) and fit
wireend ferrules to them.
IMPORTANT! If you do not use any
wire-end ferrules, there is a risk of
short circuiting between the phase
conductors.
Insert the connection cable into
7
the strain relief device.
Tighten the clamping nut
8
Fitting the connection cable to
the autotransformer
Terminal strip
NOTE!
Running the autotransformer without
ALL of the cables being properly connected can cause serious damage. Always connect all the phase conductors
and the PE conductor.
Connect the phase conductors and
1
the PE conductor of the powersource connection cable to the
“OUTPUT 50/ 60 Hz” connection
points for the power source.
Connect the phase conductors and
2
PE conductor of the auto-transformer connection cable to the
“INPUT 50/60 Hz” connection
points for the mains cable.
6
Mounting a plug
on the mains
cable
The auto-transformer is designed to run on the mains voltage given on the rating
plate. If you intend to fit a mains plug to the auto-transformer connection cable,
this must be mounted in accordance with the applicable national Standards. For
details of fuse protection of the mains supply lead, please see the Technical
Data.
NOTE!
Inadequately dimensioned electrical installations can lead to serious damage.
The mains plug and mains supply lead, and their fuse protection, must be suitably dimensioned.
EN
Final check
Check that the phase conductors and PE conductor of the connection cable
1
are correctly connected
Check that the phase conductors and PE conductor of the connection cable
2
are firmly attached to the terminal strip
WARNING!
Danger from the mains voltage and the autotransformer output voltage.
An electric shock can be fatal.
The following operations have to be done with the unit switched on. Do NOT
▶
on any account touch the auto-transformer or any of its parts while it is still
connected to the mains.
Shift the mains switch on the auto-transformer into the “0” position
3
Plug the unit into the mains or otherwise restore mains power supply
4
Using a suitable testing instrument, check the mains voltage on the “INPUT
5
50/60 Hz” mains-cable connection points
Shift the mains switch on the auto-transformer into the “I” position
6
Using a suitable testing instrument, check the output voltage on the “OUT-
7
PUT 50/60 Hz” power-source connection points
Shift the mains switch on the auto-transformer into the “0” position
8
Put the cover back on the auto-transformer
9
NOTE!
The housing screws provide a suitable PE conductor connection for earthing
(grounding) the housing. These screws must NOT be replaced by any other
screws which do not provide a reliable PE conductor connection.
Shift the mains switch on the auto-transformer into the “I” position
10
Perform an insulation and PE conductor test, using suitable testing equip-
11
ment. Do this by placing the test-prod against any of the fixing-screws of the
cover.
Shift the mains switch on the auto-transformer into the “0” position
12
Unplug the unit from the mains or otherwise disconnect the mains power
13
supply
7
Start-up
Safety
WARNING!
Danger from incorrect operation and work that is not carried out properly.
This can result in serious personal injury and damage to property.
All the work and functions described in this document must only be carried
▶
out by technically trained and qualified personnel.
Read and understand this document in full.
▶
Read and understand all safety rules and user documentation for this device
▶
and all system components.
WARNING!
Danger due to devices toppling over.
This can result in serious personal injury and damage to property.
If the welding system is not equipped with an auto-transformer, the cooling
▶
unit must be installed right at the bottom.
Please see the user documentation for the respective trolley for more in-
▶
formation about the trolley.
IMPORTANT! The following example of how to mount the auto-transformer onto
the trolley is for a combination of an MW 2200 power source, an FK 2200 cooling
unit and an “Easy” trolley. To put together any other combination, proceed analogously.
Mounting the fixing brackets to
the trolley
Turn the trolley upside-down,
1
standing it on its handles, then
hold it in the vertical.
Use a sharp pointed tool to pierce
2
the rubber mat where it lies over
the holes in the baseplate
Turn the trolley over and place it
3
on its wheels again
Attach each fixing bracket to the
4
baseplate with 3 screws
8
Mounting the
system components on the trolley
Stack the system components on
1
top of one another, fixing each unit
to the one below it (and the autotransformer to the trolley) with 4
screws.
IMPORTANT! When mounting the
power source, take care with the connector to the cooling unit. Do not subject the cable connection to tensile
strain.
EN
Putting the unit
into service
WARNING!
Danger from incorrect operation and work that is not carried out properly.
This can result in serious personal injury and damage to property.
All the work and functions described in this document must only be carried
▶
out by technically trained and qualified personnel.
Read and understand this document in full.
▶
Read and understand all safety rules and user documentation for this device
▶
and all system components.
NOTE!
The ventilation arrangements for the auto-transformer are a very important
safety feature. When choosing the machine location, make sure that it is possible for the cooling air to enter and exit unhindered through the louvers.
Shift the mains switch of the power source into the “O” position
1
Shift the mains switch on the auto-transformer into the “0” position
2
Plug the auto-transformer unit into the mains or otherwise restore mains
3
power supply.
Shift the mains switch on the auto-transformer into the “I” position
4
The auto-transformer is now ready for operation
5
9
Care, maintenance and disposal
Safety
WARNING!
Danger from incorrect operation and work that is not carried out properly.
This can result in serious personal injury and damage to property.
All the work and functions described in this document must only be carried
▶
out by technically trained and qualified personnel.
Read and understand this document in full.
▶
Read and understand all safety rules and user documentation for this device
▶
and all system components.
WARNING!
Danger from electrical current.
This can result in serious personal injury and damage to property.
Before starting work, switch off all devices and components involved and dis-
▶
connect them from the grid.
Secure all devices and components involved so they cannot be switched back
▶
on.
After opening the device, use a suitable measuring instrument to check that
▶
electrically charged components (such as capacitors) have been discharged.
WARNING!
At every startup
Danger from electric current due to defective system components and incorrect operation.
This can result in serious personal injury and damage to property.
All cables, leads and hosepacks must always be securely connected, undam-
▶
aged and correctly insulated.
Only use adequately dimensioned cables, leads and hosepacks.
▶
WARNING!
Danger due to insufficient ground conductor connection.
This can result in serious personal injury and damage to property.
The housing screws provide a suitable ground conductor connection for
▶
grounding the housing.
The housing screws must not under any circumstances be replaced by other
▶
screws without a reliable ground conductor connection.
Check the mains plug and mains cable for damage
-
Check that there is a gap of 0.5 m (1 ft. 8 in.) all around the device to ensure
-
that cooling air can flow and escape unhindered
NOTE!
10
Air inlets and outlets must never be covered, not even partially.
Every 6 months
Danger due to the effect of compressed air.
This can result in damage to property.
▶
An electric shock can be fatal!
Risk of electric shock from improperly connected ground cables and equipment
grounds.
▶
Disposal Waste electrical and electronic equipment must be collected separately and re-
cycled in an environmentally-friendly way, in accordance with the European Directive and national legislation. Used equipment must be returned to the distributor or disposed of via an approved local collection and disposal facility. Correct
disposal of used equipment promotes the sustainable recycling of material resources. Failing to dispose of used equipment correctly can lead to adverse
health and/or environmental impacts.
CAUTION!
Do not bring the air nozzle too close to electronic components.
Dismantle device side panels and clean inside of device with dry, reduced
1
compressed air
If a lot of dust has accumulated, clean the cooling air ducts
2
WARNING!
When reassembling the side panels, make sure that grounding cables and
equipment grounds are properly connected.
EN
Packaging materials
Separate collection according to material. Check your local authority regulations.
Crush containers to reduce size.
11
Troubleshooting
Safety
WARNING!
Danger from incorrect operation and work that is not carried out properly.
This can result in serious personal injury and damage to property.
All the work and functions described in this document must only be carried
▶
out by technically trained and qualified personnel.
Read and understand this document in full.
▶
Read and understand all safety rules and user documentation for this device
▶
and all system components.
WARNING!
Danger from electrical current.
This can result in serious personal injury and damage to property.
Before starting work, switch off all devices and components involved and dis-
▶
connect them from the grid.
Secure all devices and components involved so they cannot be switched back
▶
on.
After opening the device, use a suitable measuring instrument to check that
▶
electrically charged components (such as capacitors) have been discharged.
WARNING!
Danger from electric current due to defective system components and incorrect operation.
This can result in serious personal injury and damage to property.
All cables, leads and hosepacks must always be securely connected, undam-
▶
aged and correctly insulated.
Only use adequately dimensioned cables, leads and hosepacks.
▶
WARNING!
Danger due to insufficient ground conductor connection.
This can result in serious personal injury and damage to property.
The housing screws provide a suitable ground conductor connection for
▶
grounding the housing.
The housing screws must not under any circumstances be replaced by other
▶
screws without a reliable ground conductor connection.
12
Troubleshooting
Power source inoperative
Mains switch is ON, but indicators are not lit up
EN
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Mains fuse or automatic circuit breaker has tripped
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
There is a break in the mains lead; the mains plug is not plugged in
Check mains lead, check mains voltage if necessary
Mains outlet socket or plug is faulty
Replace faulty components
The mains switch of the auto-transformer is faulty
Contact After-Sales Service (Replace the mains switch of the auto-
transformer)
Phase conductors (L1, L2, L3) connected incorrectly
Connect phase conductors as described
Mains fuse underrated
Rate mains lead fuse according to rating plate
Short circuit on the transformer windings
Replace the auto-transformer
Auto-transformer not connected correctly
Correct the mains connection
Output voltage too low
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Output voltage too high
Cause:
Remedy:
Cause:
Remedy:
Incorrect mains voltage
Check the mains voltage
Mains leads are connected incorrectly
Correct mains connection
L1/L2/L3 swapped with N-conductor
Correct the mains connection
Actual mains voltage is greater than permitted for the auto-transformer
Adjust the mains voltage
Auto-transformer not connected correctly
Correct the mains connection
13
Surface of auto-transformer housing feels hot
Cause:
Remedy:
Permitted duty cycle exceeded
Turn mains switch of the auto-transformer to "O" position, allow
auto-transformer to cool
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Asymmetric output voltage
Cause:
Remedy:
The connected welding machine is drawing too much current
Check the current consumption of the connected welding machine
Unsuitable installation location
Change installation location (ensure air can move unhindered
through openings in housing)
Ambient temperature too high
Reduce ambient temperature or change installation location
Housing interior dirty
Open auto-transformer and clean with compressed air
Mains voltage too high
Check voltage and correct mains supply
Incorrectly connected mains cable/mains plug
Connect the mains cable neutral and phase conductors correctly/
attach a new mains plug/ contact After-Sales Service (replace the
wiring terminal)
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Mains switch - break/contact fault
Contact After-Sales Service (replace the mains switch)
Damaged mains cable/PE conductor break/faulty wiring terminal
Replace mains cable/contact After-Sales Service (replace wiring ter-
minal)
Auto-transformer connected asymmetrically
Connect auto-transformer symmetrically
Wiring terminal - break/contact fault
Contact After-Sales Service (fix/replace the wiring terminal)
14
Technical data
EN
Safety
MW/TT
1700/2200 autotransformer
NOTE!
Incorrectly rated mains plugs, mains leads or fuses can result in serious damage. If the power source is designed for a special voltage, the technical data on
the rating plate apply. Rate the mains plug, mains lead and their fuse protection
accordingly.
Mains voltage 2 x 460 V
Mains voltage tolerance +/- 10 %
Mains frequency 50 / 60 Hz
Output voltage 2 x 230 V
Mains fuse protection (slow-blow) 16 A
Apparent power, max 6.6 kVA
Apparent power, effective 3.7 kVA
Cos phi 0.9
Primary current, max. 14.5 A
Primary current, effective 8 A
Secondary current at
10 min / 40 °C
10 min / 40 °C
Degree of protection IP 23
Type of cooling F
Insulation class F
Dimensions L x W x H mm 470 x 180 x 175 mm
Weight 17,55 kg
Marks of conformity CE
40 % d.c.
100 % d.c.
28.9 A
16 A
18.5 x 7.01 x 6.89 in.
38.69 lb.
15
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