IF ANY PROBLEMS OCCUR, PLEASE CONTACT YOUR LOCAL DISTRIBUTOR.
Start-up Quick Guide
1.Check that the delivery corresponds to your order, see Chapter 3.
2.Before taking any commissioning actions read carefully the safety instructions in
Chapter 1.
3.Before the mechanical installation, check the minimum clearances around the unit
(Chapter 5.6) and check the ambient conditions in Chapter 4.2.
4.Check the size of the motor cable, mains cable, mains fuses and check the cable
connections, read Chapters 6.2.2 to 6.2.7.
5.Follow the installation instructions, see Chapter 7.
6.Control connections are explained in Chapter 8.2.1.
7.If the Start-Up wizard is active, select the language of the keypad, the application you
want to use and set the basic parameters asked by the wizard. Always confirm by
pressing the
Enter button
. If the Start-Up wizard is not active, follow the instructions 7a
and 7b.
7a. Select the language of the keypad from the Menu M6, page 6.1. Instructions on using the
keypad are given in Chapter 9.
7b. Select the application you want to use from the Menu M6, page 6.2. Instructions on using
the keypad are given in Chapter 9.
8.All parameters have factory default values. In order to ensure proper operation, check
the rating plate data for the values below and the corresponding parameters of
parameter group G2.1.
• nominal voltage of the motor
• nominal frequency of the motor
• nominal speed of the motor
• nominal current of the motor
• motor cos
ϕ
Some options may require special parameter settings.
All parameters are explained in the All in One Application Manual.
9.Follow the commissioning instructions, see Chapter 10.
10. The Vacon NX_ Frequency Converter is now ready for use.
Vacon Plc is not responsible for the use of the frequency converters against the
instructions.
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vacon • 4SAFETY
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1.SAFETY
ONLY A COMPETENT ELECTRICIAN MAY CARRY OUT THE
ELECTRICAL INSTALLATION
= DANGEROUS VOLTAGE!
= WARNING or CAUTION
1.1Warnings
The Vacon NX frequency converter is meant for fixed installations only.
Do not perform any measurements when the frequency converter is connected to the
mains.
Do not perform any voltage withstand tests on any part of Vacon NX. There is a certain
procedure according to which the tests shall be performed. Ignoring this procedure
may result in damaged product.
The frequency converter has a large capacitive leakage current.
If the frequency converter is used as a part of a machine, the machine manufacturer is
responsible for providing the machine with a main switch (EN 60204-1).
Only spare parts delivered by Vacon can be used.
The motor starts at power-up if the start command is 'ON'. Furthermore, the I/O
functionalities (including start inputs) may change if parameters, applications or
software are changed. Disconnect, therefore, the motor if an unexpected start can
cause danger.
1
Prior to measurements on the motor or the motor cable, disconnect the motor cables
from the frequency converter.
Do not touch the components on the circuit boards. Static voltage discharge may
damage the components.
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SAFETYvacon • 5
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1.2Safety instructions
The components of the power unit of the frequency converter and all cabinet
mounted devices are potentially live when Vacon NX is connected to mains potential.
Coming into contact with this voltage is extremely dangerous and may cause death or
severe injury.
The motor terminals U, V, W and the DC-link/brake resistor terminals –/+ and all
other mains devices are potentially live when Vacon NX is connected to mains, even if
the motor is not running.
After disconnecting the frequency converter from the mains, wait until the fan stops
and the indicators on the keypad go out (if no keypad is attached see the indicators on
the cover). Wait 5 more minutes before doing any work on Vacon NX connections. Do
not even open the cabinet door before this time has expired.
The control I/O-terminals are isolated from the mains potential. However, the relay
outputs and other I/O-terminals may have a dangerous control voltage present even
when Vacon NX is disconnected from mains.
Before connecting the frequency converter to mains make sure that the Vacon NX
front and cable covers as well as the cabinet doors are closed.
NOTE! If a fault protection relay is used , it must be of at least type B, preferably B+ ( according to
EN 50178) , with a trip level of 300 mA. This is for fire protection, not for touch protection in
grounded systems.
1.3Earthing and earth fault protection
The Vacon NX frequency converter must always be earthed with an earthing conductor connected
to the PE bar in the lower front side of the cabinet.
The earth fault protection inside the frequency converter protects only the converter itself against
earth faults in the motor or the motor cable. It is not intended for personal safety.
NOTE! Due to the high capacitive currents present in the frequency converter, fault current
protective switches may not function properly.
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1
vacon • 6SAFETY
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1.4Running the motor
Warning symbols
For your own safety, please pay special attention to the instructions marked with the following
symbols:
= Dangerous voltage
= General warning
= Hot surface – Risk of burn
MOTOR RUN CHECK LIST
Before starting the motor, check that the motor is mounted properly
and ensure that the machine connected to the motor allows the motor
to be started.
Set the maximum motor speed (frequency) according to the motor and
the machine connected to it.
Before reversing the motor make sure that this can be done safely.
Make sure that no power correction capacitors are connected to the
motor cable.
Make sure that the motor terminals are not connected to mains
potential.
1
NOTE! You can download the English and French product manuals with applicable safety,
warning and caution information from www.vacon.com/downloads
.
REMARQUE Vous pouvez télécharger les versions anglaise et française des manuels produit
contenant l’ensemble des informations de sécurité, avertissements et mises en garde
applicables sur le site www.vacon.com/downloads
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.
INTRODUCTIONvacon • 7
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2.INTRODUCTION
The Vacon NXC is a product range of free standing enclosed frequency converters for the high
power range. The NXC is a modular product intended for use in all applications where reliability and
high availability is appreciated.
This manual gives the basic information required to successfully perform installation and basic
commissioning. Due to the high amount of options available, not all possible variations are
described in this manual. For more information, refer to delivery-specific documentation. This
manual assumes good competence in installation and commissioning skills.
In the All in One Application Manual you will find information about the different applications
included in the All in One Application Package. Should these applications not meet the
requirements of your process please contact the manufacturer for information on special
applications.
Information on the installation of the drive in a cabinet can be found in manuals 'NXP Frequency
Converters, IP00 Module Installation, Frames FR10 to FR14 (ud00908) as well as Frequency Inverter
(UD01063) and Active Front End (UD01190) manuals.
This manual is available in both paper and electronic editions. We recommend you to use the
electronic version if possible. If you have the electronic version at your disposal you will be able to
benefit from the following features:
The manual contains several links and cross-references to other locations in the manual which
makes it easier for the reader to move around in the manual, to check and find things faster.
The manual also contains hyperlinks to web pages. To visit these web pages through the links you
must have an internet browser installed on your computer.
In case you are in doubt about your ability to perform installation or commissioning,
do not proceed. Contact your local Vacon partner for advice.
For the NXC low-harmonic drive also see the AFE application manual.
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2
vacon • 8INTRODUCTION
2.1Manufacturer's declaration of conformity
Below you can find the Manufacturer's Declarations of Conformity assuring the compliance of
Vacon NXP/C frequency converters with the EMC-directives.
A = standard (alpha-numeric)
B = no local con trol keypad
F = dummy keypad
G = graphic display
EMC emission level EN61800-3:
L = 2nd environment
T=ForITnetworks
Brake chop per
0 =No brake chopper, 1= Integrated brake chopper
Control
F=standardFR9andNXC
N = standard IP00 FR10 and NXC with IP5 4 control uni t enclosure
G = as Fbut varnished boards
O = asN but varnished boards
Cooling
S = standard air-cooled
Supply
S=6-pulse
T=12-pulse
R = Regenerative low-harmonic (AFE)
Opti on bo ards; each slot is rep resen ted by two ch aracte rs w here :
Ax = basic I/ O board, Bx = expander I/O bo ard,
Cx = fieldb us bo ard, Dx = sp ecial bo
ard
NXC options
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3.RECEIPT OF DELIVERY
Vacon NX frequency converters have undergone scrupulous tests and quality checks at the factory
before they are delivered to the customer. However, after unpacking the product, check that no
signs of transport damages are to be found on the product and that the delivery is complete
(compare the type designation of the product to the code below).
Should the drive have been damaged during the shipping, please contact primarily the cargo
insurance company or the carrier.
If the delivery does not correspond to your order, contact the supplier immediately.
In the small plastic bag included in the delivery you will find a silver
Drive modified
sticker. The
purpose of the sticker is to notify the service personnel about the modifications made in the
frequency converter. Attach the sticker to the equipment to avoid losing it. Should the frequency
converter be later modified (option board added, IP or EMC protection level changed), mark the
change in the sticker.
3.1Type designation code
3.1.1NX type designation
Figure 1. Vacon NXC type designation code
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3
vacon • 10RECEIPT OF DELIVERY
3.2NXC additional option codes
The NXC enclosure solution contains additional pre-engineered hardware options. These options
are appended to the basic type code by using “+” codes. The most common NXC options are listed
below:
3.2.1Cabling (C-group)
+CITInput (mains) cabling from TOP
+COTOutput motor cabling from TOP
3.2.2External Terminals (T-group)
+TIOI/O+ aux terminals (35 pcs)X2
+TIDI/O+ double aux terminals (70 pcs)Double-decker terminals X2
+TUPSeparate terminals for 230 VAC CVX1
3.2.3Input Device (I-group)
+ILSLoad switch
+IFDFused disconnecting switchWith aR Fuses
+ICOContactor
+IFUFusedWith aR Fuses
+ICBMoulded-case or air circuit breaker
3.2.4Main Circuit (M-group)
+MDCDC-bus bar connectionReq. BSF converter hardware
+DRPReset push-buttonDI6
+DAMAnalogue meter (AO1)48 mm, std scale 0-100%
+DCMAnalogue meter + current
transformer
+DVMAnalogue vltg meter with sel.switch0, L1-L2, L2-L3, L3-L1
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48 mm, std scale 0-600 A
3
vacon • 12RECEIPT OF DELIVERY
3.3Storage
If the frequency converter is to be kept in store before use make sure that the ambient conditions
are acceptable:
Storing temperature –40…+70
Relative humidity <95%, no condensation
The environment should also be free from dust. If there is dust in the air the converter should be
well protected to make sure dust does not get into the converter.
If the converter is to be stored during longer periods the power should be connected to the
converter once in 24 months and kept on for at least 2 hours. If the storage time exceeds 24 months
the electrolytic DC capacitors need to be charged with caution. Therefore, such a long storage time
is not recommended.
If the storing time is much longer than 24 months, the recharging of the capacitors has to be carried
out so that the possible high leakage current through the capacitors is limited. The best alternative
is to use a DC-power supply with adjustable current limit. The current limit has to be set for
example to 300…500mA and the DC-power supply has to be connected to the B+/B- terminals (DC
supply terminals).
DC-voltage must be adjusted to nominal DC-voltage level of the unit (1.35*Un AC) and supplied at
least for 1 hour.
If DC-voltage is not available and the unit has been stored de-energized much longer than 1 year
consult factory before connecting power.
°C
3
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RECEIPT OF DELIVERYvacon • 13
3.4Maintenance
In normal conditions, Vacon NX frequency converters are maintenance-free. However, we
recommend to keep the converter clean, e.g. by cleaning the heatsink with compressed air
whenever necessary.
In IP54 units, the air filters in the door and in the roof should be cleaned or replaced regularly.
We also recommended to follow proactive maintenance schedule to ensure the highest possible
utilization rate of the cabinet drive.
Table 1. Proactive maintenance schedule
Maintenance intervalMaintenance action
12 months (if unit stored)•Reform capacitors (see separate instruction)
6-24 months
(depending on environment)
5-7 years•Change cooling fans:
5-10 years•Change DC bus capacitors if DC voltage ripple is high
.
•Check I/O terminals
•Check tightness of mains connection
•Clean cooling tunnel
•Check operation of cooling fan, check for corrosion on
terminals, busbars and other surfaces
•Check door and roof filters
-main fan
-fan of the LCL filter
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3
vacon • 14RECEIPT OF DELIVERY
3.5Warranty
Only manufacturing defects are covered by the warranty. The manufacturer assumes no
responsibility for damages caused during or resulting from transport, receipt of the delivery,
installation, commissioning or use.
The manufacturer shall in no event and under no circumstances be held responsible for damages
and failures resulting from misuse, wrong installation, unacceptable ambient temperature, dust,
corrosive substances or operation outside the rated specifications.
Neither can the manufacturer be held responsible for consequential damages.
The Manufacturer's time of warranty is 18 months from the delivery or 12 months from the
commissioning whichever expires first (Vacon Warranty Terms).
The local distributor may grant a warranty time different from the above. This warranty time shall
be specified in the distributor's sales and warranty terms. Vacon assumes no responsibility for any
other warranties than that granted by Vacon itself.
In all matters concerning the warranty, please contact first your distributor.
3
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TECHNICAL DATAvacon • 15
4.TECHNICAL DATA
4.1Power ratings
4.1.1Vacon NXC – Mains voltage 380-500 V
High overload = Max current IS, 2 sec/20 sec, Rated overload current, 1 min/10 min
Following continuous operation at rated output current, rated overload
current for 1 min, followed by a period of load current less than rated
current, and of such duration that the r.m.s output current, over the duty
cycle, does not exceed rated output current (IH)
Low overload = Max current I
Following continuous operation at rated output current, rated overload
current for 1 min, followed by a period of load current less than rated
current, and of such duration that the r.m.s output current, over the duty
cycle, does not exceed rated output current (IL)
Table 2. Power ratings and dimensions of Vacon NX 6- and 12-pulse drives supply voltage 380-500V
Mains voltage 380-500 V, 50/60 Hz, 3~
, 2 sec/20 sec, Rated overload current, 1 min/10 min
NOTE! The rated currents in given ambient temperatures are achieved only when the switching
frequency is equal to or less than the factory default (automatic thermal management).
*The dimensions indicated are for the basic 6-pulse IP21 version of the converter cabinet. Some
options may increase the width, height or weight of the cabinet. See the delivery specific
documentation for more details.
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4
vacon • 16TECHNICAL DATA
4.1.2Vacon NXC low harmonic drives – Mains voltage 380-500 V
High overload = Max current IS, 2 sec/20 sec, Rated overload current, 1 min/10 min
Following continuous operation at rated output current, rated overload
current for 1 min, followed by a period of load current less than rated
current, and of such duration that the r.m.s output current, over the duty
cycle, does not exceed rated output current (IH)
Low overload = Max current I
, 2 sec/20 sec, Rated overload current, 1 min/10 min
S
Following continuous operation at rated output current, rated overload
current for 1 min, followed by a period of load current less than rated
current, and of such duration that the r.m.s output current, over the duty
cycle, does not exceed rated output current (IL)
Table 3. Power ratings and dimensions of Vacon low-harmonic drives, supply voltage 380-500V
NOTE! The rated currents in given ambient temperatures are achieved only when the switching
frequency is equal to or less than the factory default (automatic thermal management).
*The dimensions indicated are for the basic low-harmonic IP21 version of the converter cabinet.
Some options increase the width, height or weight of the cabinet. Check the delivery specific
documentation for more details.
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TECHNICAL DATAvacon • 17
4.1.3Vacon NXP/C 6 – Mains voltage 500-690 V
High overload = Max current IS, 2 sec/20 sec, Rated overload current, 1 min/10 min
Following continuous operation at rated output current, rated overload
current for 1 min, followed by a period of load current less than rated
current, and of such duration that the r.m.s output current, over the duty
cycle, does not exceed rated output current (IH)
Low overload = Max current IS, 2 sec/20 sec, Rated overload current, 1 min/10 min
Following continuous operation at rated output current, rated overload
current for 1 min, followed by a period of load current less than rated
current, and of such duration that the r.m.s output current, over the duty
cycle, does not exceed rated output current (IL)
Table 4. Power ratings and dimensions of Vacon NX 6- and 12-pulse drives, supply voltage 500—690V
NOTE! The rated currents in given ambient temperatures are achieved only when the switching
frequency is equal to or less than the factory default (automatic thermal management).
*The dimensions indicated are for the basic 6-pulse IP21 version of the converter cabinet. Some
options increase the width, height or weight of the cabinet. Check the delivery specific
documentation for more details.
** Maximum ambient temperature +35 °C.
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4
vacon • 18TECHNICAL DATA
4.1.4Vacon NXC low harmonic drives – Mains voltage 525-690 V
High overload = Max current IS, 2 sec/20 sec, Rated overload current, 1 min/10 min
Following continuous operation at rated output current, rated overload
current for 1 min, followed by a period of load current less than rated
current, and of such duration that the r.m.s output current, over the duty
cycle, does not exceed rated output current (IH)
Low overload = Max current IS, 2 sec/20 sec, Rated overload current, 1 min/10 min
Following continuous operation at rated output current, rated overload
current for 1 min, followed by a period of load current less than rated
current, and of such duration that the r.m.s output current, over the duty
cycle, does not exceed rated output current (IL)
Table 5. Power ratings and dimensions of Vacon low-harmonic drives, supply voltage 525-690V
NOTE! The rated currents in given ambient temperatures are achieved only when the switching
frequency is equal to or less than the factory default (automatic thermal management).
*The dimensions indicated are for the basic low-harmonic IP21 version of the converter cabinet.
Some options increase the width, height or weight of the cabinet. Check the delivery specific
documentation for more details.
** Maximum ambient temperature +35 °C.
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TECHNICAL DATAvacon • 19
4.2Technical data
Table 6. Technical data
Mains connection
Motor connection
Input voltage U
Input frequency45…66 Hz
Connection to mainsOnce per minute or less (normal case);
Supply earthing systemTN-S, TN-C, TN-CS, TT or IT
Short circuit ratingsDefined by ratings of installed fuses or circuit
Output voltage0—U
Continuous output cur-
rent
OverloadabilityHigh: 1.5 x IH (1 min/10 min), Low: 1.1 x IL (1 min/10 min)
Starting currentIS for 2 s every 20 s
Output frequency0…320 Hz; (higher with special SW)
Control performance•Open Loop Vector Control (5-150% of base
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4
vacon • 20TECHNICAL DATA
Table 6. Technical data
Ambient conditions
EMC (at default
settings)
Ambient operating temperature
Storage temperature–40 °C…+70 °C
Relative humidity0 to 95% RH, non-condensing, non-corrosive,
Air quality:
-chemical vapours
-mechanical
particles
Cabinet surface treatment
Altitude100% load capacity (no derating) up to 1,000 m
Vibration
EN50178/EN60068-2-6
Shock
EN50178, EN60068-2-27
Enclosure classIP21/NEMA1 standard in entire kW/HP range
ImmunityFulfils all EMC immunity requirements
EmissionsEMC level L: EN 61800-3 (2004), Category C3
–10 °C (no frost)…+40 ºC
no dripping water
IEC 721-3-3, unit in operation, class 3C2
IEC 721-3-3, unit in operation, class 3S2
Nanoceramic pretreatment. Anodic dipcoat-priming
and textured powder-coating.
1-% derating for each 100m above 1000;
max. 3000 m (690 V max 2000 m).
Displacement amplitude 0.25 mm (peak) at 5…31 Hz
Max acceleration 1 G at 31…150 Hz
Use anti-vibration mountings under the drive if
extra vibration resistance is required.
UPS Drop Test (for applicable UPS weights)
Storage and shipping: max 15 G, 11 ms (in package)
IP54/NEMA12 option in entire kW/HP range
Pollution degree PD2
EMC level T: Low earth-current solution for ITnetworks, EN 61800-3 (2004), Category C4 (can be
modified from level L units.
Safety
EN 50178 (1997), EN 60204-1 (1996), EN 60950
(2000, 3rd edition) (as relevant), CE, UL, CUL, EN
61800-5; (see unit nameplate for more detailed
approvals).
IEC 60664-1 and UL840 in overvoltage category III.
4
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TECHNICAL DATAvacon • 21
Table 6. Technical data
Analogue input voltage0…+10 V, Ri = 200 kΩ, (–10 V…+10 V joystick control)
Resolution 0.1%, accuracy ±1%
Analogue input current0(4)…20 mA, Ri = 250 Ω differential; Resolution
0.1%, accuracy ±1%
Digital inputs (6)Positive or negative logic; 18…30 VDC
Auxiliary voltage+24 V, ±15%, max volt. ripple < 100 mVrms; max.
250 mA
Dimensioning: max. 1000 mA/control box
Control connections
(factory default I/O)
Output reference voltage +10 V, ±3%, max. load 10 mA
Analogue output0(4)…20 mA; RL max. 500 Ω; Resolution 10 bit;
Accuracy ±2%
Digital outputsOpen collector output, 50 mA/48 V
Relay outputs2 programmable change-over relay outputs
Switching capacity: 24 VDC/8 A, 250 VAC/8 A,
125 VDC/0.4 A
Min. switching load: 5 V/10 mA
Protections
Thermistor input (OPTA3)
Overvoltage trip limit
Undervoltage trip limit
Earth fault protectionIn case of earth fault in motor or motor cable, only
Mains supervisionTrips if any of the input phases is missing
Motor phase supervision Trips if any of the output phases is missing
Overcurrent protectionYes
Unit overtemperature
protection
Motor overload
protection
Motor stall protectionYe s
Motor underload
protection
Short-circuit protection
of +24V and +10V
reference voltages
Galvanically isolated, Rtrip = 4.7 kΩ
NX_5: 911 VDC; NX_6: 1200 VDC
NX_5: 333 VDC; NX_6: 460 VDC
the frequency converter is protected
Yes
Yes **
Motor overload protection provided at 110% of full
load current
Yes
Yes
* The rated currents in given ambient temperatures are achieved only when the switching
frequency is equal to or less than the factory default. Thermal management might reduce the
switching frequency.
** System software version NXP00002V186 (or newer) must be used for the motor thermal memory
and memory retention functionality to conform to UL 508C requirements. If an older system
software version is used, motor overtemperature protection is required at installation to comply
with UL requirements.
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4
vacon • 22MOUNTING
H1
W1
D1
11483_00
5.MOUNTING
5.1Dimensions
The table below shows the dimensional drawing of the basic cabinet. It is allowed to install NXC
drives side by side. Please note that certain NXC options will further affect the total width or height
of the cabinet. Always refer to the delivery specific information for the exact dimensions.
* the options +GPL or +GPH (Plinth) increase the height by 100mm or 200mm respectively
** some options, e.g. +CIT (Top input cabling +400mm), +COT (Top output cabling +400mm) and +ODU
(output du/dt filter +400mm) affect the width of the cabinet
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5
vacon • 24MOUNTING
Min 60°
Min 60°
Min 60°
11484_00
5.2Lifting the unit out of the transport packaging
The unit is delivered either in a wooden box or a wooden cage. The box may be transported either
horizontally or vertically, while transportation of the cage in a horizontal position is not allowed.
Always refer to shipping marks for more detailed information. To lift the unit out of the box, use
lifting equipment capable of handling the weight of the cabinet.
There are lifting lugs on the top of the cabinet and these lugs can be used to lift the cabinet into an
upright position and to move it to the place needed.
Figure 3. Lifting the unit
NOTE! Location of lifting lugs varies between different frames.
Recycle the packaging material according to local regulations.
5
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MOUNTINGvacon • 25
13006.emf
11485_00
5.3Fixing the unit to the floor or to the wall
Before starting the installation work make sure that the level of the floor is within acceptable limits.
The maximum deviation from the basic level can be no more than 5 mm over 3 m distance. The
maximum acceptable height difference between cabinet front and rear edges should be within +2/
-0mm limit.
The cabinet should always be fixed to the floor or to the wall. Depending on installation conditions,
the cabinet sections can be fixed in different ways. There are holes in the front corners which can
be used for fixing. Additionally, the rails on the top of the cabinet have fixing lugs for fixing the
cabinet to the wall.
Welding of the cabinet might risk sensitive components in the converter.
Ensure that no earthing currents can flow through any part of the converter.
5.3.1Fixing to the floor and to the wall
In installations where the cabinet is mounted against the wall, it is more convenient to fix the top of
the cabinet to the wall. Fix the cabinet in the two front corners to the floor with bolts. Fix the top part
to the wall with bolts. Note that the rails and the fixing lugs can be moved horizontally to make sure
the cabinet stands in a horizontal position. In converters consisting of more than one cabinet
section, fix all sections in the same way.
Figure 4. Fixing the cabinet to the floor and to the wall
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5
vacon • 26MOUNTING
11486_00
5.3.2Fixing to the floor only
NOTE! This option is not available for FR13 and bigger units. For fixing FR13 and bigger units see
delivery specific documentation.
If bottom-only fixing is used, additional fixing brackets (Rittal part.nr. 8800.210) or equivalent are
necessary. Fix the cabinet to the floor in the front with bolts and use the fixing brackets in the
middle. Fix all cabinet sections in the same way.
Figure 5. Fixing all for corners to the floor
5
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MOUNTINGvacon • 27
13006.emf
111
333
222
Terminal numbers
11487_uk
Move the bridge plate to change
tapping
11488 uk
5.4AC choke connections
NOTE! The NXC low-harmonic drive incorporates an LCL filter instead of AC chokes and this
instruction can be ignored.
The AC input choke carries out several functions in the Vacon NX 6- and 12-pulse frequency
converter. The input choke is needed as an essential component for motor control, to protect the
input and DC-link components against abrupt changes of current and voltage as well as to function
as a protection against harmonics.
The NXC 6- and 12-pulse frequency converter is equipped with one or more input AC chokes. The
chokes have two inductance levels to optimise the functionality at different supply voltages. In the
installation phase, the wiring of the chokes should be checked and changed if needed (not for FR9).
The input is always connected to terminal #1 (see picture below) and should not be changed. The
output of the choke should be connected to terminal #2 or #3 (see picture below) according to the
table below. The terminals are marked with inductance values and applicable voltage.
In units FR10 to FR12, the connection is changed by moving the cable to the appropriate terminals.
In FR13/14, the bridges of the busbar connection should be moved according to the settings shown
in the table.
In units with two or more parallel chokes (some FR11 as well as all FR12 and FR13)
all chokes have to be wired in the same way. If chokes are wired differently the converter may be damaged.
Figure 6. Input chokes
Supply voltage
400-480 Vac/50-60 Hz
(500 V unit)
500 Vac/50 Hz
(500 V unit)
500 Vac/50 Hz
(690 V unit)
575-690 Vac/50-60 Hz
(690 V unit)
Converter
connection
(terminals)
2
3
3
3
Figure 7. Input chokes tapping in FR13/14 units
24-hour support +358 (0)201 212 575 • Email: vacon@vacon.com
5
vacon • 28MOUNTING
5.5Auxiliary voltage transformer tappings
NOTE! An auxiliary voltage transformer is always included as standard in NXC low-harmonic drives.
If the drive is ordered with an auxiliary voltage transformer for 230V auxiliary voltage supply (+ATx
option) the tappings of the transformer have to be set according to the mains voltage.
The tappings of the transformer in 500V drives is by default set to 400V or 500V and in 690V drives
to 690V unless otherwise ordered.
Locate the transformer in the lower part of the cabinet. The primary side of the transformer has
tappings that correspond to standard main voltages. Change to tapping to correspond to the mains
voltage in use.
5
Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205
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