Vacon NX Active Front End User Manual

vacon nx

®

ac drives

active front end unit (afe)

user manual

vacon • 1

TABLE OF CONTENTS

Document: DPD00906B

Version release date: 18.5.15

1. Safety ...............................................................................................................5

1.1 Warnings ............................................................................................................................6

1.2 Safety Instructions .............................................................................................................6

1.3 Earthing ..............................................................................................................................6

2. EU Directive .....................................................................................................7

2.1 CE marking .........................................................................................................................7

2.2 EMC directive .....................................................................................................................7

2.2.1 Introduction ........................................................................................................................7

2.2.2 Technical criteria ...............................................................................................................7

2.2.3 Vacon Active Front End EMC classification .......................................................................7

2.2.4 Manufacturer’s declaration of conformity .........................................................................7

3. Receipt of delivery .........................................................................................10

3.1 Type designation code for the AFE unit ...........................................................................10

3.2 Type designation code for the LCL filter .........................................................................11

3.3 Type designation code for the pre-charging components ..............................................12

3.4 Storage .............................................................................................................................13

3.5 Maintenance .....................................................................................................................14

3.6 Lifting the modules ..........................................................................................................15

3.7 Lifting the LCL filters .......................................................................................................17

3.8 Warranty ...........................................................................................................................19

Rev. B

4. Active Front End (AFE) ...................................................................................20

4.1 Introduction ......................................................................................................................20

4.2 Active Front End Unit block diagram ...............................................................................22

4.3 Active Front End frame sizes ...........................................................................................23

4.4 Active Front End unit technical data ................................................................................25

4.5 LCL filter technical data ...................................................................................................27

4.6 Application ........................................................................................................................28

4.7 Diagrams ..........................................................................................................................28

4.7.1 Connection between control unit and power unit ...........................................................28

4.7.2 LCL wiring diagram ..........................................................................................................29

4.8 Active Front End power ratings .......................................................................................33

4.8.1 Vacon NXA; DC voltage 380–500 V ....................................................................................33

4.8.2 Vacon NXA; DC voltage 525–690 V ....................................................................................33

4.9 Active Front End unit – Dimensions .................................................................................34

4.10 LCL filter – Dimensions ....................................................................................................34

4.11 Active Front End unit – Fuse selection ............................................................................35

4.11.1 Introduction ......................................................................................................................35

4.11.2 Fuses; mains voltage 380–500 V ......................................................................................35

4.11.3 Fuses; mains voltage 525–690 V ......................................................................................36

4.12 Active Front End unit – Circuit breaker selection ...........................................................38

4.13 Main contactor .................................................................................................................39

4.14 Pre-Charging circuit ........................................................................................................40

4.15 Paralleling ........................................................................................................................41

4.15.1 Common pre-charging circuit .........................................................................................41

4.15.2 Each Active Front End unit has the pre-charging circuit ................................................43

4.16 Derating ............................................................................................................................44

4.16.1 Ambient Temperature ......................................................................................................44

4.16.2 Installation altitude ..........................................................................................................44

5. Installation .....................................................................................................46

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5.1 Mounting ...........................................................................................................................46

5.1.1 Active Front End Unit .......................................................................................................46

5.1.2 LCL filter ..........................................................................................................................48

5.1.3 Control Box ...................................................................................................................... 50

5.2 Cooling ..............................................................................................................................53

5.2.1 Active Front End unit ........................................................................................................53

5.2.2 LCL filter ..........................................................................................................................57

5.2.3 Arranging ventilation of the enclosure ............................................................................60

5.2.4 Steering air flow ...............................................................................................................61

5.3 Power connection .............................................................................................................64

5.3.1 AC connection ..................................................................................................................64

5.3.2 DC connection ..................................................................................................................64

5.3.3 LCL filter Fan power supply .............................................................................................64

5.4 Control unit ......................................................................................................................68

5.5 Galvanic isolation barriers ...............................................................................................70

6. Control Keypad .............................................................................................. 71

6.1 Indicators on the keypad display ......................................................................................72

6.1.1 Drive status indications ....................................................................................................72

6.1.2 Status LEDs (green – green – red) ..................................................................................72

6.1.3 Text Lines .........................................................................................................................73

6.2 Keypad push-buttons .......................................................................................................74

6.2.1 Buttons descriptions.........................................................................................................74

6.3 Navigation on the control keypad ....................................................................................75

6.3.1 Monitoring menu (M1) ......................................................................................................76

6.3.2 Parameter menu (M2) ......................................................................................................77

6.3.3 Keypad control menu (M3) ...............................................................................................79

6.3.4 Active fault menu (M4) .....................................................................................................79

6.3.5 Fault types ........................................................................................................................80

6.3.6 Fault codes .......................................................................................................................81

6.3.7 Fault history menu (M5) ...................................................................................................83

6.3.8 System menu (M6) ...........................................................................................................84

7. Appendices .....................................................................................................93

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vacon • 3

AT LEAST THE 11 FOLLOWING STEPS OF THE

START-UP QUICK GUIDE

MUST BE PERFORMED

DURING THE INSTALLATION AND COMMISSIONING.

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 and
check the ambient conditions in Chapter 5.

4. Check the size of the supply cable/bus bar, DC output cable/bus bar, and mains fuses,
DC fuses and check the cable connections.

5. Follow the installation instructions, see Chapter 5.

6. The sizes and earthing of control connections are explained in Chapter 5.

7. If the Start-Up wizard is active, select the language you want the keypad and confirm by
pressing the enter button. If the Start-Up wizard is not active, follow the instructions in 8
below.

8. Select the language of the keypad from Menu M6, S6.1. Instructions on using the keypad
are given in Chapter 6.

9. All parameters have factory default values. 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 supply (P2.1.1)

• Digital input settings according to connections (P2.2.1.1-P2.2.1.8)

• Change control place to I/O (P3.1)

In case of parallel AFE:

• Set drooping parameter to 5% (P2.5.1)

• Set PWM Synch parameter to Enable (P2.5.2)
All parameters are explained in the Active Front End (AFE) Application Manual.

10. Follow the commissioning instructions in the Active Front End Application Manual.

11. The Vacon

®

NX Active Front End is now ready for use.

Vacon Plc is not responsible for the use of the Active Front End against the instructions.

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vacon • 4

ABOUT THE VACON NXA USER'S MANUAL

Congratulations for choosing Vacon

®

NX Active Front End!

The User's Manual will provide you with the necessary information about the installation,
commissioning and operation of Vacon NX Active Front End. We recommend that you carefully
study these instructions before powering up the active front end for the first time.

In the Active Front End Application Manual you will find information about the Active Front End
application. Should that application not meet the requirements of your process, please contact the
manufacturer for information on special application.

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 to move around in the manual. The reader can thus easily find and check things.

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.

This manual is applicable only for Active Front End units, LCL filters and optional components that
are introduced in this manual.

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Safety vacon • 5

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1. SAFETY

This manual contains clearly marked cautions and warnings which are intended for your personal
safety and to avoid unintentional damage to the product or connected appliances.

Please read the information included in cautions and warnings carefully.

The cautions and warnings are marked as follow:

Table 1. Warning signs

DANGER! Dangerous voltage

WARNING! or CAUTION!

CAUTION! Hot surface

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1

vacon • 6 Safety

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1.1 Warnings

The components of the power unit, LCL filter and pre-charging circuit are live when the
Active Front End is connected to AC supply. Coming into contact with this voltage is
extremely dangerous and may cause death or severe injury. The control unit is
isolated from mains potential.

The control I/O-terminals are isolated from the mains potential. However, the relay
outputs and other I/O-terminals may have dangerous control voltage present even
when the Active Front End is disconnected from the AC supply.

1.2 Safety Instructions

Do not touch the components on the circuit boards. Static voltage discharge may
damage the components.

The Active Front End, LCL filter and optional components are used for fixed
installations only.

Do not perform any measurements when the Active Front End is connected to the AC
supply.

After having disconnected the Active Front End from the AC supply, wait until the fan
stops and the indicators on the keypad go out (if no keypad is attached see the indica­tor through the keypad base). Wait 5 more minutes before doing any work on Active
Front End connections. Do not even open the cover before this time has expired.

Do not perform any voltage withstand tests on any part of Active Front End. There is a
certain procedure according to which the tests shall be performed. Ignoring this
procedure may result in damaged product.

Before connecting the Active Front End to AC supply, make sure that the Active Front
End front and cable covers are closed.

Before doing any work on Common DC bus, system shall be earthen.

1.3 Earthing

1

The Active Front End unit and LCL filter must always be earthed with an earthing conductor
connected to the earthing terminal.

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EU Directive vacon • 7

2. EU DIRECTIVE

2.1 CE marking

The CE marking on the product guarantees the free movement of the product within the EEA
(European Economic Area). It also guarantees that the product complies with applicable directives
(for example, the EMC Directive and other possible so-called new method directives). Vacon
Active Front End carries the CE label as a proof of compliance with the Low Voltage Directive (LVD),
Electro Magnetic Compatibility (EMC) Directive and RoHS Directive. SGS FIMKO has acted as the
Notified Body.

2.2 EMC directive

2.2.1 Introduction

The EMC Directive provides that the electrical apparatus must not excessively disturb the
environment it is used in, and, on the other hand, it shall have an adequate level of immunity toward
other disturbances from the same environment.

The compliance of Vacon
Construction Files (TCF) and checked and approved by SGS FIMKO, which is a Notified Body. The
Technical Construction Files are used to authenticate the conformity of Vacon NX Active Front End
with the Directive because it is impossible to test such a large product family in a laboratory
environment and because the combinations of installation vary greatly.

®

NX Active Front End with the EMC Directive is verified with Technical

®

NX

2.2.2 Technical criteria

Our basic idea was to develop a range of Vacon
usability and cost efficiency. EMC compliance was a major consideration from the outset of the
design.

2.2.3 Vacon Active Front End EMC classification

Factory delivered Vacon
immunity requirements (standard EN 61800-3).

Class T:

Class T equipment have a small earth leaking current and can be used with floating DC input.

2.2.4 Manufacturer’s declaration of conformity

The following page presents the photocopy of the Manufacturer's Declaration of Conformity
assuring the compliance of Vacon

®

NX Active Front End are Class T equipment, which fulfills all EMC

®

NX Active Front End with the EMC-directives.

®

NX Active Front End offering the best possible

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2

vacon • 8 EU Directive

EC DECLARATION OF CONFORMITY

We

Manufacturer's name: Vacon Oyj

Manufacturer's address: P.O.Box 25
Runsorintie 7
FIN-65381 Vaasa
Finland

hereby declare that the product

Product name: Vacon NX Common DC bus Products

Model

designation: Vacon NXA 0004 5… to 2700 5

Vacon NXA 0004 6… to 2250 6

has been designed and manufactured in accordance with the following standards:

Safety: EN 60204-1:2009 (as relevant)
EN 61800-5-1:2007
Low Voltage Directive 2006/95/EC

EMC: Factory delivered Vacon NX inverter modules comply

with the requirements of category 4 equipment according
to EN 61800-3:2004.

EMC Directive 2004/108/EC

It is ensured through internal measures and quality control that the product conforms at all
times to the requirements of the current Directive and the relevant standards.

In Vaasa, 25

th

of September, 2009
Vesa Laisi
President

The year the CE marking was affixed: 2005

11240.pdf

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2

Receipt of delivery vacon • 9

3. RECEIPT OF DELIVERY

Vacon® NX Active Front End has 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 transportation damage are to be found on the product and that the delivery is complete
(compare the type designation of the product to the codes below, See Figure 1, Figure 2, Table 2).

Should the product 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.

3.1 Type designation code for the AFE unit

In Vacon type designation code for Common DC Bus components, the Active Front End Unit is
characterised by letter A and number 2. If the Active Front End unit is ordered by number 2 delivery
does not include anything else than the unit itself.

NOTE! The delivery does not include the auxiliary devices, which are needed for the operation (the
AC or DC fuses, the fuses bases, the main contactor or circuit breaker, etc.). The customer will take
care of the auxiliary devices.

VACON NX ACTIVE FRONT END - TYPE CODE

NX A AAAA V A 0 T 0 2 S F A1 A2 00 00 00

NX

A

AAAA

V

A

0Enclosure class

T EMC emission level

0 Internal brake shopper

2 Delivery include

S

Product Generation

Module type
A = AFE Active Front End

Nominal current (low overload)
eg. 0261 = 261 A, 1030 = 1030 A, etc.

Nominal supply voltage
5 = 380-500 VAC / 465-800 VDC
6 = 525-690 VAC / 640-1100 VDC

Control keypad
A = standard (alpha numeric)

0 = IP00, FI9-13

T = IT networks (EN61800-3)

0 = N/A (no brake chopper)

2 = AFE module

S = Standard air cooled drive
U = Standard air cooled power unit - external supply for main fan

F

A1 Option boards; each slot is represented by two characters:

A2

00

00

00

Hardware modifications; module type - S Boards
F = Fiber connection, standard boards, FI9-FI13
G = Fiber connection, varnished boards, FI9-FI13

A = Basic I/O board B = Expander I/O board
C = Fieldbus board D = Special board

Figure 1. Type designation code for the Active Front End

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vacon • 10 Receipt of delivery

3.2 Type designation code for the LCL filter

LCL filters has two versions of cooling fan power supply, one without the integrated DC/DC power
supply and one with it. The LCL filter is characterized without the integrated DC/DC power supply
by letter A and with the integrated DC/DC power supply by letter B in version column, Figure 2.

VACON LCL FILTERS FOR AFE - TYPE CODE

VACON LCL AAAA V A 0 R 0 1 1 T

LCL

AAAA

V

A

0

0261 5

0460 5

1300 5

0170 6

0325 6

1030 6

Product range
LCL = LCL filter for AFE

Nominal current (low overload)

eg. 0460 = 460 A, 1300 = 130 A, etc.

Voltage class
5 = 380-500 VAC
6 = 525-690 VAC

Version (hardware)
A = DC fan without DC/DC power supply
B = DC fan with integrated DC/DC power supply

Enclosure class:
0 = IP00

R

0

1

1

T

Reserve

Reserve

Reserve

Cooling fan type
1 = DC fan

Manufacturer
T = Trafotek

Figure 2. Type designation code for the LCL filters

3

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Receipt of delivery vacon • 11

3.3 Type designation code for the pre-charging components

The pre-charging components can be ordered separately. The pre-charging resistors are optimized
for each Active Front End unit. Components of the pre-charging circuit are 2 pcs charging resistors,
the contactor, the diode bridge and the snubber capacitor, see Table 2. Each pre-charging circuit
has maximum charging capacity, see Table 20.

Table 2. Type designation code for the pre-charging components

FI9 AFE/CHARGING-AFE-FFE-FI9

Item Q’ty Description Manufacturer Product Code

1 1 Diode Bridge Semikron SKD 82
2 2 Charging resistors Danotherm CAV150C47R
3 1 Snubber capacitor Rifa PHE448
4 1 Contactor Telemecanique LC1D32P7

FI10 AFE/CHARGING-AFE-FFE-FI10

Item Q’ty Description Manufacturer Product Code

1 1 Diode Bridge Semikron SKD 82
2 2 Charging resistors Danotherm CBV335C20R
3 1 Snubber capacitor Rifa PHE448
4 1 Contactor Telemecanique LC1D32P7

FI13 AFE/CHARGING-AFE-FFE-FI13

Item Q’ty Description Manufacturer Product Code

1 1 Diode Bridge Semikron SKD 82
2 2 Charging resistors Danotherm CAV335C11R
3 1 Snubber capacitor Rifa PHE448
4 1 Contactor Telemecanique LC1D32P7

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vacon • 12 Receipt of delivery

3.4 Storage

If Vacon® NX Active Front End is to be stored before use, make sure that the ambient conditions are
acceptable:

Storage temperature –40…+70 °C
Relative humidity <95%, no condensation

When the Active Front End unit is stored without voltage being applied, the recharging of the
capacitors should be done at least once a year by connecting voltage into the unit and keeping it
powered at least for 1hour.

If the storing time is much longer than one year, 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 DC-power supply with adjustable current limit. Current limit has to be set for example to
300…500 mA and DC-power supply has to be connected to the B+/B- terminals (DC supply
terminals). DC-voltage must be adjusted up to nominal DC-voltage level of the unit (1.35*U
shall be supplied at least for 1 hour.

If DC power supply with current limiting is not available and unit has been stored much longer than
1 year de-energized, consult factory before connecting the power.

AC) and

n

3

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Receipt of delivery vacon • 13

3.5 Maintenance

All technical devices, drives as well, need a certain amount of care-taking and failure preventive
maintenance. To maintain trouble-free operation of the Vacon
environmental conditions, as well as load, line power, process control, etc. have to be within
specifications, determined by manufacturer.

If all conditions are in accordance with the manufacturer's specifications, there are no other
concerns, but to provide a cooling capacity high enough for the power- and control circuits. This
requirement can be met by making sure, that the cooling system works properly. Operation of
cooling fans and cleanness of the heat sink should be verified regularly.

Regular maintenance is recommended to ensure trouble free operation and long lifetime of Vacon
NX Active Front End. At least the following things should be included in the regular maintenance.

Table 3. Maintenance interval

Interval Maintenance

12 months (if unit is stored) Capacitor reforming, see seperate instructions.

Check tightening torque of the input and output
terminals and I/O terminals.

Clean the cooling tunnel.

6 - 24 months (depending on environment)

Check operation of the cooling fan, check for
corrosion on terminals, bus bars and other
surfaces.

®

NX Active Front End,

®

Check the door filters.

Change the cooling fans.

5 - 7 years

5 - 10 years

It is also recommended to record all actions and counter values with dates and time for follow up
of maintenance.

Main fan of the unit.
Fan of the LCL filter.

Change the DC bus capacitors if DC voltage ripple
is high.

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vacon • 14 Receipt of delivery

45

11179.emf

3.6 Lifting the modules

The modules can be lifted by the holes on top. Place the lifting hooks symmetrically in at least four
holes. The maximum allowed lifting angle is 45º. For frames FI9 and FI10, see Figure 3 and for the
frame FI13, see Figure 4.

The lifting equipment must be able to carry the weight of the module.

3

Figure 3. Lifting points for FI9 and FI10 modules

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Receipt of delivery vacon • 15

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Figure 4. Lifting points for FI13 modules

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vacon • 16 Receipt of delivery

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3.7 Lifting the LCL filters

The modules can be lifted by the holes on top. Place the lifting hooks symmetrically in two holes in
the FI9 and FI10 LCL filters and four holes in the FI13 LCL filter. The maximum allowed lifting angle
is 45º. For the FI9 and FI10 LCL filter, see Figure 5 and for the FI13 LCL filter, see Figure 6.

3

Figure 5. Lifting points for FI9 and FI10 LCL filter

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Receipt of delivery vacon • 17

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Figure 6. Lifting points for FI13 LCL filter

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vacon • 18 Receipt of delivery

3.8 Warranty

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 warranty period is 18 months from the delivery or 12 months from the
commissioning whichever expires first (Vacon PLC general terms and conditions of sale).

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 your distributor first.

3

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Active Front End (AFE) vacon • 19

NFE*

3

FFE*

3

2

3

INU

2

3

INU

2

3

INU

2

2

BCU

AFE*

*

alternative

2 2 2

11168.emf

Common DC bus

4. ACTIVE FRONT END (AFE)

4.1 Introduction

The Vacon® NX Active Front End is used to transfer power between the AC input and intermediate
DC circuit. The Vacon NX Active Front End has a two-way function. This means that when power is
transferred from the AC input to the intermediate DC circuit, the Vacon NX Active Front End rectifies
the alternating current and voltage. When power is transferred from the intermediate DC circuit to
the AC input, the Vacon NX Active Front End inverts the direct current and voltage.

The difference between Vacon
low current distortion (THDI). In a typical Vacon NX Active Front End configuration, the desired
number of Inverters, Figure 7, are connected to the intermediate DC circuit.

The Active Front End configuration consists of the unit itself, LCL filter, pre-charging circuit, control
unit, AC fuses, main contactor (or circuit-breaker) and DC fuses, Figure 8.

®

NX Active Front End and other Front Ends is that the unit creates

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Figure 7. Typical Active Front End configuration

4

vacon • 20 Active Front End (AFE)

11169.emf

UUVVW

W

L1
L2
L3

L1
L2
L3

L1 L2 L3

+LCL-U1

+AFE-U1

NXA

XXXXX

PE

AP

OF

B+ B-

-F2,1

-X1

-R -R

1

11

22

3

4

-X1

-K3

-V3

+

-

4 5 6

1 2 3

1 2 3

2 4 6

2 4 6

1 3 5

1 3 5

-Q3

4 5 6

4 5 6

1 2 3

1 2 3

PE

DC+
DC-

3

2

-K1

-F1,1

-Q1

-Q2

21
22

Double Insulated

Double Insulated

Main Circuit

4

Figure 8. Vacon Active Front End Single Unit connections

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Active Front End (AFE) vacon • 21

B+

B-

U/T1

V/T2

W/T3

RS-232

11170.emf

Power Module

Control Module Keypad

Control

Driver

Measure­ments

Power
supply

Fan

ASIC

IGBT

bridge

I/O

slot E

I/O

slot D

I/O

slot C

I/O

slot A

I/O

slot B

4.2 Active Front End Unit block diagram

Figure 9. NXA block diagram

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vacon • 22 Active Front End (AFE)

11174.emf

11175.emf

4.3 Active Front End frame sizes

Figure 10. Vacon NXA, FI9. Protection class IP00

4

Figure 11. Vacon NXA, FI10. Protection class IP00

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Active Front End (AFE) vacon • 23

11173.emf

Figure 12. Vacon NXA, FI13. Protection class IP00

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vacon • 24 Active Front End (AFE)

4.4 Active Front End unit technical data

Table 4. Technical specification for Vacon® NXA Active Front End unit

AC input connection

DC output

connection

Control

characteristics

Ambient conditions

Voltage U

in

Frequency f

in

380...500 Vac; 525...690 Vac; –10%…+10%

48–63 Hz

Starting delay FI9–FI13: 5 s
Voltage 1.35 x Uin x 1.1 (default DC link voltage boosting is

110%).

Continuous output
current

IH: Ambient temperature +40 °C,
overloadability 1.5 x I
I

: Ambient temperature +40 °C,

L

overloadability 1.1 x I

(1 min./10 min.).

H

(1 min./10 min.).

L

Control system Open Loop Vector Control
Switching frequency NXA_xxxx 5: 3.6 kHz

NXA_xxxx 6: 3.6 kHz

Ambient temperature
during operation

–10 °C (no freezing)…+40 °C: I
–10 °C (no freezing)…+40 °C: I

H

L

Maximum temperature +50 °C, see Power derating

as a function of ambient temperature.
Storage temperature –40 °C…+70 °C
Relative humidity 0 to 95% RH, non-condensing, non-corrosive, no

dripping water.

EMC (using factory

settings)

Safety

Air quality:

- chemical fumes

- solid particles

Elevation of place of
operation

EN 60721, equipment in operation, Class 3C3.

IEC 721-3-3, equipment in operation, Class 3S2.

100% loadability (no derating) up to 1000 m.

Maximum elevation 2000 m (525-690 VAC) and

4000 m (380-500 VAC),

Relay I/O: max. 240 V: 3000 m; max. 120 V: 4000 m,

see Power derating as a function of installation

altitude. See Chapter 4.16.
Vibration

EN50178/EN 60068-2-6

5…150 Hz.

Vibration amplitude 1 mm (peak) in frequency

range 3…15.8 Hz.

Max. acceleration 1 G in frequency range 15.8…150

Hz.
Impacts

EN 50178,

UPS drop test (with applicable UPS weights)

Storage and transport: max. 15 G, 11 ms (packed).
EN 60068-2-27

Enclosure class IP00/NEMA1 standard size in the kW/HP range.
Immunity

EN 61800-3 (2nd edition 2004), second

environment.

EN 50178 (1997), EN 60204-1 (1996-2009), EN

60950 (2000, 3. edition) (as relevant), CE, UL, cUL,

FI, GOST R, IEC-EN 61800-5; (for approvals, see the

unit nameplate).

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Active Front End (AFE) vacon • 25

Table 4. Technical specification for Vacon® NXA Active Front End unit

Analogue input voltage 0…+10 V, Ri = 200 kΩ.

Resolution 0.1%, accuracy ±1%
Analogue input current 0(4)…20 mA, Ri = 250 Ω differential

Digital inputs (6) Positive or negative logic; 18…30 VDC
Auxiliary voltage +24 V, ±15%, max. 250 mA

Control connections

Reference voltage,
output

Analogue output (1) 0(4)…20 mA; RL max. 500 Ω; Resolution 10 bit;

Digital outputs Open collector output, 50 mA / 48 V.
Relay outputs 2 programmable changeover relay outputs

+10 V, +3%, max. load 10 mA

Accuracy ±2%

Breaking capacity: 24 VDC / 8 A, 250 VAC / 8 A, 125

VDC / 0.4 A.

Min. switching load: 5 V / 10 mA.

Protection

Overvoltage protection
Undervoltage protection

Earth fault protection In case of earth fault in the supply cable, the earth

Input phase monitoring Trips if any of the input phases is missing.
Overcurrent protection Yes
Unit overheat protection Yes
Short-circuit protection

of +24 V and +10 V
reference voltages

NXA_5: 911 VDC; NXA_6: 1200 VDC

NXA_5: 333 VDC; NXA_6: 460 VDC

fault protection only protects the NX-AFE itself.

Yes

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4

vacon • 26 Active Front End (AFE)

4.5 LCL filter technical data

Table 5. Technical specifications for Vacon LCL filter for Active Front End units

AC connections

Cooling fan With

integrated DC/DC-

power supply

Cooling fan with

external DC-power

supply

EMC (using factory

settings)

Safety

Voltage U

Frequency f

Continuous output current Same as the unit
Switching frequency LCLxxxx 5: 3.6 kHz

Input voltage U

Power consumption 220 W
Losses 20…30 W
Short-circuit protection DC fuses on the input side
Input voltage U

Current 5 A
Short-circuit protection AC fuses on the input side of the external

Immunity

Ambient temperature during
operation

in

in

in

in

Same as the unit

50 or 60 Hz +2%

LCLxxxx 6: 3.6 kHz

333...911 Vdc; 460...1200 Vdc

48 Vdc; -10...+10%

power supply.

EN 61800-3 (2nd edition 2004), second
environment.

Same as the unit

Same as the unit

Ambient conditions

Protection

Storage temperature Same as the unit
Relative humidity Same as the unit
Air quality:

- Chemical fumes

- Solid particles
Elevation of place of operation Same as the unit
Vibration

EN 50178/EN 60068-2-6
Impacts

EN 50178, EN 60068-2-27
Dissipation power Approximately 1%
Cooling fan rotation monitoring Yes (with integrated DC/DC power supply)
Over-temperature monitoring Ye s

Same as the unit

Same as the unit

Same as the unit

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Active Front End (AFE) vacon • 27

4.6 Application

The Vacon® NX Active Front End needs special application software, which is delivered with the NX
AFE unit. More information on the application can be found in Application User’s Manual.

4.7 Diagrams

4.7.1 Connection between control unit and power unit

The communication connections between the Active Front End power unit and the
established using optical cable, Figure 13. The standard cable length of the optical cable is 1,5 m.
For optional the optical cables can get different lengths. The maximum length of the optical cable
is 10 m. The adapter board is located back side of the control unit, see Figure 14. ASIC board
terminals located in the unit under the black cover, Figure 15. To open black cover two screws at
left and right side should be opened.

control unit

is

Figure 13. Optical cable adapter board

Figure 14. Optical cable adapter board

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4

vacon • 28 Active Front End (AFE)

Figure 15. Optical cable terminals in the unit (FI13 example)

Optical terminals on adapter board

H1

H2

H3

H4

H5

H6

H7

X1

X2

X3

Gate control enable

Phase U control

Phase V control

Phase W control

ADC synchronization

VaconBus data from control board to ASIC

VaconBus data from ASIC to control board

Other terminals on adapter board

Control board connection

Supply voltage 24 Vin (from power unit ASIC)

Supply voltage 24 Vin (customer);

•Max. current 1A

• Terminal #1: +

• Terminal #2: –

4

NOTE! The minimum fibre cable bending radius is 50 mm.

NOTE! Terminals

control I/O terminals (e.g. from board OPT-A1) is used, this terminal must be protected with a diode.

4.7.2 LCL wiring diagram

The LCL filter contains a choke on the mains side, capacitors and a choke on the AFE side,
Figure 16. The LCL also includes capacitors connected against ground potential. There are
resistors connected across the capacitors for discharging them when the LCL filter is disconnected
from the input power. The discharging resistors are 10 MΩ, 500 V and 0,5 W.

X2 and X3 can be in use simultaneously. However, if the +24 V supply from the

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