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vacon nxn
User guide
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User guide [ru]
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Danfoss vacon nxn User guide

Download
vacon® nxn
ac drives
non-regenerative front end unit (nfe)
user manual
1
1
Safety vacon 6
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1

1. SAFETY

1.1 Warnings

WARNING
1
The components of the power unit circuit are live when the Non­Regenerative 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.
2
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 Non-Regenerative Front End is discon­nected from the AC supply.
3
Do not touch the components on the circuit boards. Static voltage dis­charge may damage the components.

1.2 Safety Instructions

1
The Non-Regenerative Front End, AC choke and optional components are meant for fixed installations only.
2
Do not perform any measurements when the Non-Regenerative Front End is connected to the AC supply.
3
After having disconnected the Non-Regenerative Front End from the AC supply, wait until the fan stops. Wait 5 more minutes before doing any work on the Non-Regenerative Front End connections. Do not even open the cover before this time has expired.
4
Do not perform any voltage withstand tests on any part of the Non­Regenerative Front End. There is a certain procedure according to which the tests must be performed. Ignoring this procedure may result in dam­aged product.
5
Before connecting the Non-Regenerative Front End to AC supply, make sure that the Non-Regenerative Front End front and cable covers are closed.
6
Before doing any work on Common DC bus, system must be grounded.

1.3 Grounding

The Non-Regenerative Front End unit and AC choke must always be grounded with an grounding conductor connected to the grounding terminal.
ONLY A COMPETENT ELECTRICIAN MAY CARRY OUT
THE ELECTRICAL INSTALLATION
!
vacon 7 Safety
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1.4 Warning symbols

For your own safety, please pay special attention to the instructions marked with the following sym­bols:
=
Dangerous voltage
WARNING
=
General warning
HOT SURFACE
=
Hot surface Risk of burn
NOTE! You can download the English and French product manuals with applicable safety, warning and caution information from https://www.danfoss.com/en/service-and-support/.
REMARQUE Vous pouvez télécharger les versions anglaise et française des manuels produit sur le site https://www.danfoss.com/en/service-and-support/.
EU directive vacon 8
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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® NX Non­Regenerative Front End carries the CE label as a proof of compliance with the Low Voltage Directive (LVD) and the Electro Magnetic Compatibility (EMC) 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 must have an adequate level of immunity toward other disturbances from the same environment.
The compliance of VACON® NX Non-Regenerative Front End with the EMC directive is verified with Technical 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 Non-
Regenerative 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.
2.2.2

Technical criteria

Our basic idea was to develop a range of VACON® NX Non-Regenerative Front End offering the best possible usability and cost efficiency. EMC compliance was a major consideration from the outset of the design.
2.2.3

VACON® Non-Regenerative Front End EMC classification

Factory delivered VACON® NX Non-Regenerative Front End are Class T equipment, which fulfills all EMC 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
The following page presents the photocopy of the Manufacturer's Declaration of Conformity assuring the compliance of VACON® NX Non-Regenerative Front End with the EMC-directives.
Warning: This product is of the restricted sales distribution class according to IEC 61800-3. In resi­dential areas, this product may cause radio interference in which case the user may be required to take adequate measures.
vacon 9 EU directive
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Receipt of delivery vacon 10

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3
3. RECEIPT OF DELIVERY VACON® NX Non-Regenerative 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 3-1 and Figure 3-2).
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 NFE unit

In VACON® type designation code for Common DC Bus components, the Non-Regenerative Front End Unit is characterized by letter N and letter N or S. If the Non-Regenerative Front End unit is ordered by letter N delivery is not include anything else than the unit itself. If letter S is used delivery include the unit, the AC choke.
NOTE! Delivery does NOT include any auxiliary devices which are needed for proper operation (the AC or DC fuses, the fuses bases, the main contactor or circuit breaker etc.) The customer must take care of them.
vacon 11 Receipt of delivery
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Figure 3-1. Type designation code for the Non-Regenerative Front End.
Receipt of delivery vacon 12
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3.2 Type designation code for the AC choke

AC choke has one version which is suitable for 380-500V and 525-690V voltages.
Figure 3-2. Type designation code for the AC choke.

3.3 Storage

If VACON® NX Non-Regenerative Front End is to be stored before use, make sure that the ambient conditions are acceptable:
Storage temperature °C Relative humidity <95%, no condensation

3.4 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® NX Non-Regenerative Front End, 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 Non-Regenerative Front End. At least the following things should be included in the regular maintenance.
vacon 13 Receipt of delivery
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Table 3-1. Maintenance interval
It may also be necessary to check the tightening torques of terminals at certain intervals. It is also recommended to record all actions and counter values with dates and time for follow up of
maintenance. It may also be necessary to check the tightening torques of terminals at certain inter­vals.

3.5 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 45 degrees. For enclosures FI9, see Figure 3-3.
The lifting equipment must be able to carry the weight of the module.
Figure 3-3. Lifting points for FI9 module.
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3.6 Lifting the AC choke

The AC choke can be lifted by the holes on top. Place the lifting hooks symmetrically in two holes. The maximum allowed lifting angle is 45 degrees. Lifting points for the AC choke, see Figure 3-4.
Figure 3-4. Lifting points for AC choke.

3.7 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 commis-
sioning whichever expires first (General delivery terms NL92/Orgalime S92). 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. The manufacturer assumes no responsibility for any other warranties than that granted by the manufacturer itself.
In all matters concerning the warranty, please contact your distributor first.
vacon 15 Non-Regenerative Front End (NFE)
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4. NON-REGENERATIVE FRONT END (NFE)

4.1 Introduction

The VACON® NX Non-Regenerative Front End is used to transfer power between the AC input and intermediate DC circuit. The VACON® NX Non-Regenerative Front End has only a one-way function. This means that power can only be transferred from the AC input to the intermediate DC circuit. If braking is needed, brake chopper has to be connected to the intermediate DC circuit.
In a typical VACON® NX Non-Regenerative Front End configuration, the desired number of Inverters, Figure 4-1, are connected to the intermediate DC circuit.
The Non-Regenerative Front End configuration consists of the unit itself, AC choke, AC fuses, main contactor and DC fuses, Figure 4-2.
Figure 4-1. Typical Non-Regenerative Front End configuration.
NFE*
3
FFE*
3
2
3
INU
2
3
INU
2
3
INU
2
2
BCU
AFE*
Common DC bus
* alternative
2 2 2
Non-Regenerative Front End (NFE) vacon 16
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Figure 4-2. VACON® Non-Regenerative Front End Single Unit connections
CLOSE
-RO2
26
24
25
vacon 17 Non-Regenerative Front End (NFE)
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4.2 Non-Regenerative Front End enclosure sizes

Figure 4-3. VACON® NXN, FI9. Protection class IP00
Non-Regenerative Front End (NFE) vacon 18
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4.3 Non-Regenerative Front End unit technical data

Mains connection
Input voltage Uin
380 - 690 Vac; -15%...+10%, EN 60204-1
Input frequency
45…66 Hz
Continuous input current
IH: Ambient temperature max. +40°C,
overload 1.5 x IH (1 min./10 min.) IL: Ambient temperature max. +40°C, overload 1.1 x IL (1 min./10 min.)
Connection to mains
Unlimited (internal overload protections)
Current THD
Depend on additional chokes ( normal case < 40%)
Starting delay
Depend on dc bus capacitance (max 10 s)
Unexpected input power break
Shorter breaks than 40ms works normally if DC does not drop remarkably. Longer break means normal starting operation (charging current varies according to load).
DC connection
Output voltage Uout
465...800Vdc ( 380-500 Vac);
640...1100Vdc ( 525-690 Vac);
Efficiency
>98%
DC bank capasitance
6.8µF (included 10 M discharging resistor)
Control charac­teristics
Control method
NFE is an independent power unit. Charging and protections controlled by NFE itself.
Ambient condi­tions
Ambient operating tempera­ture
H L
Storage temperature
–40°C…+70°C
Relative humidity
0 to 95% RH, non-condensing, non-corrosive, no dripping water
Air quality:
- chemical vapours
- mechanical particles
IEC 721-3-3, unit in operation, class 3C2 IEC 721-3-3, unit in operation, class 3S2
Altitude
100% load capacity (no derating) up to 1,000 m 1-% derating for each 100m above 1000.; max. 2000m
Vibration EN50178/EN60068-2-6
Displacement amplitude 0.
Shock EN50178, EN60068-2-27
UPS Drop Test (for applicable UPS weights) Storage and shipping: max 15 G, 11 ms (in package)
Cooling air required
1150 m3/h
Enclosure class
IP00/Open type standard size in the kW/HP range
EMC (at default set­tings)
Immunity
Fulfil all EMC immunity requirements. Can be chosen N-, L- or T-level.
Safety
CE, UL, CUL EN 61800-5-1 (2003); (see unit nameplate for more detailed approvals)
Control connec­tions
Display
LCD
Trip information
Relay I/O
Auxiliary voltage
+24 V, +/- 20%, max. load 50 mA
Analogue output
0(4)-20 mA, RL=500 Ohm
Digital output
Open collector, max. Load 48V/50 mA
Relay outputs
Max switching load: 250Vac/2A or 250Vdc/0.4 A
Protections
Unit over temperature pro­tection
Trips if temperature rising over trip level (default) Current measurement
Trips if current over trip level (default)
Supply phase supervision
Trips if any of the output phases is missing (default)
Table 4-1. Technical specification for VACON® NX Non-Regenerative Front End unit
vacon 19 Non-Regenerative Front End (NFE)
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4.4 Application

The VACON® NX Non-Regenerative Front End needs a special application. The unit is delivered with that application. If application code is needed please contact please contact the manufacturer. More information about application can be found from this manual.

4.5 Diagrams

4.5.1

Connection between control unit and power unit

The communication connections between the Non-Regenerative Front End power unit and the
con-
trol unit
is established using serial cable, Figure 4-4. The control unit is located under the front cov-
er of the power unit. The control unit cannot place outside of the power unit.
Figure 4-4. NFE power and control connections.
Non-Regenerative Front End (NFE) vacon 20
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4.6 Non-Regenerative Front End power ratings

4.6.1
VACON® NX N; DC voltage 460 800V
Unit
Low oveload (AC current)
High oveload
(AC current)
DC Power
(continuous)
Type
Code
Enclosure
I
L-cont [A]
I
1min [A]
I
H-cont [A]
I
1min [A]
400V mains
500 V mains
P [kW]
P [kW]
NFE
NXN_0650 6
FI9
650
715
507
793
410
513
Table 4-2. Power ratings of VACON® NXN, supply voltage 460 800Vdc
For dimensions of NXN units, see Table 4-4 and AC choke Table 4-5.
Note: The rated currents in given ambient (+40°C). Note: The motor output power: Pout=Pdc x (Eff.INU x Eff.Motor).
Pdc =NFEs DC power Eff.INU=efficiency of the inverter Eff.Motor=efficiency of the motor
4.6.2
VACON® NX N; DC voltage 640 1100V
Unit
Low oveload (AC current)
High oveload
(AC current)
DC Power
(continuous)
Type
Code
Enclosure
I
L-cont [A]
I
1min [A]
I
H-cont [A]
I
1min [A]
690V mains
P [kW]
NFE
NXN_0650 6
FI9
650
715
507
793
708
Table 4-3. Power ratings of VACON® NXN, supply voltage 640 1100Vdc
For dimensions of NXN unit, see Table 4-4 and AC choke Table 4-5.
Note: The rated currents in given ambient (+40°C). Note: The motor output power: Pout=Pdc x (Eff.INU x Eff.Motor).
Pdc =NFEs DC power Eff.INU=efficiency of the inverter Eff.Motor=efficiency of the motor
4.7 Non-Regenerative Front End unit Dimensions
Module
Module Dimension
Type
Enclosure
Height
Width
Depth
Weight
[mm]
[mm]
[mm]
[kg]
NFE
FI9
1030
239
372
67
Table 4-4. The NXN unit dimensions
Note: More detailed dimensions can be found in Appendix 7-4.
4.8 AC choke Dimensions
Module
Module Dimension
Type
Enclosure
Height
Width
Depth
Weight
[mm]
[mm]
[mm]
[kg]
AC choke
CHK-650
449
497
249
130
Table 4-5. AC choke dimensions
Note: More detailed dimensions can be found Appendix 7-5.
vacon 21 Non-Regenerative Front End (NFE)
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4.9 Non-Regenerative Front End Fuse selection
4.9.1

Introduction

AC fuses are used to protect the input network in case the Non-Regenerative Front End unit or the AC choke is faulty. DC fuses are used to protect the Non-Regenerative Front End unit and the AC choke in case there is a short circuit in the DC buses. If DC fuses are not used, short-circuit in the DC buses will cause a loading of the Non-Regenerative Front End unit. Vacon Ltd will not assume any responsibility for damages caused by insufficient protection.
4.9.2
Fuses; mains voltage 380 690V
4.9.2.1 AC fuses
Module
AC fuses
Type
Code
Enclosure
Ferraz Shawmut
UN
[V]
IN [A]
Size
Q'ty
type [aR]*
NFE
NXN_0650 6
FI9
NH3UD69V1000PV
690
1000
3
3
Table 4-6. Ferraz Shawmut AC fuse selection, mains voltage 380 690Vac
Module
AC fuses
Type
Code
Enclosure
Bussman
UN
[V]
IN [A]
Size
Q'ty
type [aR]*
NFE
NXN_0650 6
FI9
170M6466
690
1250
3BKN/50
3
Table 4-7. Bussman AC fuse selection, mains voltage 380 690Vac
Note: All fuses are blade type. If some other type is needed please contact your nearest distributor.
4.9.2.2 DC fuses
Module
DC fuses
Type
Code
Enclosure
Ferraz Shawmut
UN
[V]
IN [A]
Size
Q'ty
type [aR]*
NFE
NXN_0650 6
FI9
PC73UD11C13CTF
1100
1250
73(LR)
2
Table 4-8. Ferraz Shawmut DC fuse selection, mains voltage 465 1100Vdc
Module
DC fuses
Type
Code
Enclosure
Bussman
UN
[V]
IN [A]
Size
Q'ty
type [aR]*
NFE
NXN_0650 6
FI9
170M8610
1000
1000
3BKN/75
2
Table 4-9. Bussman DC fuse selection, mains voltage 465 1100Vdc
Note: All fuses are flush-end type. If some other type is needed please contact your nearest distributor.
4.10 Non-Regenerative Front End unit Circuit breaker selection
The Non-Regenerative Front End can also be protected by a circuit-breaker. The recommended type of circuit-breaker is shown in Table 4-10. If a circuit-breaker from another manufacturer is used, it must be equivalent to the circuit-breaker shown. Further information on the circuit-breaker shown is available from the manufacturer. Circuit-breaker does not provide the same level of protection as
Non-Regenerative Front End (NFE) vacon 22
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4
fuses. A circuit-breaker can be used without a main contactor. The circuit-breakers shown are suit­able for equipment rated at 380 690 V.
Table 4-10. Circuit breaker for VACON® NXN
4.11 Non-Regenerative Front End unit Main contactor
If a main contactor is to be used, the type shown in Table 4-11 are recommended. If a contactor from another manufacturer is used, it must be equivalent to the types shown. Further information on the contactor shown is available from the manufacturer.
Table 4-11. Recommended main contactor type.

4.12 Pre-Charging and start up

External pre-charging circuit is not needed with the Non-Regenerative Front End. Pre-charging is done by controlling thyristors and the DC link voltage is charged smoothly. Pre-charging is current limit controlled. Due to this, the charging time varies depending on DC link capacitance. The Non­Regenerative Front End performs charging when the main contactor is closed and a start signal is applied to DIN1. The NFE goes into run mode after successful charging. If Non-regenerative Front Ends are connected in parallel, each module charges DC link voltage independently. Parallel con­nected modules can be connected to the supply simultaneously or one module at a time. See Appen­dix 7-2 for the circuit diagram of parallel connected NFE modules.
The Non-Regenerative Front End monitors the pre-charging process. If the time of charging is over the adjustable pre-charging monitoring time (default 10s) a fault is indicated. If the DC link capaci­tance is so high that the default value for charging monitoring is not enough, the value can be in­creased.

4.13 Paralleling

The power of the input group can be increased by connecting several Non-Regenerative Front End units in parallel. No communication between the units is required; they work independently.
Each Non-Regenerative Front End unit connected in parallel must have its own short-circuit protec­tion on AC and DC sides. The fuses are selected in accordance with Section 4.9. When paralleling, attention must be paid to the sufficient short-circuit capacity of the system.
The derating of Non-Regenerative Front End units connected in parallel is 5% of the DC power; this should be taken into account when selecting the input unit.
If a device is to be isolated from the AC and DC voltages, and other Non-Regenerative Front End units connected in parallel are also to be used, separate isolators are required in the AC input and DC output. The AC input can be isolated using a compact circuit-breaker, an ordinary circuit-breaker or a fuse switch. Contactors are not suitable for isolating the AC input because they cannot be locked in the safe position. The DC output can be isolated using a fuse switch. A load isolation switch or safety isolation switch can be used for this. The device can also be connected to mains even when the other devices connected in parallel are already connected and running. After this, the device can be connected to the intermediate circuit.
vacon 23 Non-Regenerative Front End (NFE)
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Note: Parallel connection means that the AC supply of more than one units connected together from DC link is
coupled with the same supply transformer.

4.14 12-pulse solution

In 12-pulse solution the supply transformer has two galvanically separated secondary circuits, see Appendix 7-3. The 12-pulse solution can reduce the effect of harmonic waves of the current in the supply network. In order to reduce the effect of harmonics, there must be a phase displacement of 30º between the secondary circuits of the transformer. The phase displacement is implemented by connecting one secondary circuit to triangle and the other to star. In 12-pulse solution there must be an equal number of non-regenerative units connected to the both secondary coils of the supply transformer.

4.15 Derating

The output power has to be derated if one of following cases:
• Ambient temperature is more than 40ºC
• Installation altitude is more than 1000 m

4.15.1 As the Ambient Temperature

The power rating of the Non-Regenerative Front End unit is valid for an ambient temperature of 40ºC. If the device is to be used in higher ambient temperatures, its power rating must be subjected to derating. The derating coefficient is 1.5%/1ºC, for ambient temperatures not exceeding 50ºC. The reduced power is calculated using the formula:
x)/100)*C)º40(%100((* −−= tPP
nde
Pn = nominal power of the unit t = ambient temperature x = derating coefficient
Non-Regenerative Front End (NFE) vacon 24
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Derating as a function of ambient temperature
50
60
70
80
90
100
110
0 10 20 30 40 50 60
Ambient temperature, ºC
Loadability, %
Loadability %
Figure 4-5. Derating as the ambient temperature.
vacon 25 Non-Regenerative Front End (NFE)
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4.15.2 As the Installation altitude

The power rating of the Non-Regenerative Front End unit is valid for a maximum installation altitude of 1,000 m (380-690 V). If the device is to be used in higher installation altitudes, its power rating must be subjected to derating. The derating coefficient is 1.5%/100m. The power rating of the device can be reduced to a maximum installation altitude of 3,000 m (380V-500V) or of 2000 m (525V-690V). The reduced power is calculated using the formula:
x)/100)*)(%100((*
baseinstnde
hhPP −−=
Pn = nominal power of the unit hinst = intended installation altitude hbase = 1,000 m x = derating coefficient
Derating as a function of installation altitude
0
20
40
60
80
100
120
0 500 1000 1500 2000 2500 3000 3500
Installation altitude, m
Loadability, %
Loadability %
Figure 4-6. Derating as the installation altitude 380-500V.
Non-Regenerative Front End (NFE) vacon 26
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Derating as a function of installation altitude
84
86
88
90
92
94
96
98
100
102
0 500 1000 1500 2000 2500
Installation altitude, m
Loadability, %
Loadability %
Figure 4-7. Derating as the installation altitude 525-690V.
Note: If higher installation altitude than 3,000 m is required please contacts your nearest distributor to get
more information.
vacon 27 Installation
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5

5. INSTALLATION

5.1 Mounting

The equipment mounting must be sturdy enough to carry the weight of the equipment. The enclo­sure class of the equipment will depend on the mounting and solutions to be used. The equipment mounting must provide sufficient shielding for contact of the live parts (IP2x). The installation and mounting must comply with local laws and regulations.
5.1.1

Non-Regenerative Front End Unit

The Non-Regenerative Front End can be mounted in a vertical position on the back plane of a cubi­cle. Enough space must be reserved around the Non-Regenerative Front End to ensure sufficient cooling, see Figure 5-5. Follow the minimum dimensions for installation, see Table 5-1. Required cooling air capacity and minimum air holes on the switchgear, see Table 5-2. Also make sure that the mounting plane is relatively even. The Non-Regenerative Front End is fixed with four bolts, Fig­ure 5-1.
Figure 5-1. Mounting points of FI9 NFE unit.
Installation vacon 28
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5.1.2

AC choke

The AC choke can only be mounted in a vertical position on the floor of a cubicle. Enough space must be reserved around the AC choke to ensure sufficient cooling, see Figure 5-7. Follow the minimum dimensions for installation, see Table 5-3. Required cooling air capacity and minimum air holes on the switchgear, see Table 5-4. Also make sure that the floor is relatively even. AC choke must be at­tached properly so that it will not be able to move.
AC choke can be mounted so that the connectors face forward or so that they face to the side. Figure 5-2 presents a mounting where the connectors face forward. Figure 5-3 presents a mounting where the connectors face to the side. This mounting is recommended if the Non-Regenerative Front End units are parallel connected. In this case it must be assured that the connectors face to the same direction and that there is enough space between the connectors and the AC choke.
Figure 5-2. Mounting of AC choke.
Figure 5-3. Mounting of parallel connected AC chokes.
vacon 29 Installation
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5
5.1.3

Control Box

The Control unit of the Non-Regenerative Front End unit is mounted under the front cover of mod­ule, see Figure 5-4. VACON® alphanumeric display and the navigation wheel can be used for pa­rameterization and monitoring of the Non-Regenerative Front End unit.
Figure 5-4. Mounting of the control unit.

5.2 Cooling

5.2.1

Non-Regenerative Front End unit

Enough free space must be left around the Non-Regenerative Front End unit to ensure sufficient air circulation and cooling. You will find the required dimensions for free space in the table below. You will find the required cooling air, minimum air holes and heat dissipation in the Table 5-2.
When planning the cooling for the space, take into consideration that the Non-Regenerative Front End unit heat loss is approx. 1% of the nominal capacity. Air flow, see Figure 5-6.
Table 5-1. Mounting space dimensions.
A = free space above the unit
B
= distance between inverter and cabinet wall
C = free space underneath of the units
D
= distance between two units
Installation vacon 30
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Figure 5-5. Installation space for FI9.
Figure 5-6. Cooling airflow for FI9 NFE unit.
Type
Heat dissi-
pation (W)
Cooling air required
(m3/h)
Minimum air holes on
switchgear (mm2)
NXN_0650 6
2450
1150
65000
Table 5-2. Required cooling air for the Non-Regenerative Front End unit.
vacon 31 Installation
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5.2.2

AC choke

Enough free space must be left around the AC choke to ensure sufficient air circulation and cooling. You will find the required dimensions for free space in the table below. You will find the required cooling air, minimum air holes and heat dissipation in the Table 5-4.
When planning the cooling for the space, take into consideration that the AC choke heat loss is ap­prox. 0.5% of the nominal capacity.
Table 5-3. Mounting space dimensions.
A = free space above the AC choke
B
= distance between AC choke and cabinet wall
C
= free space under the AC choke
D
= distance between AC choke and cabinet wall
E
= distance between AC choke and cabinet wall
Figure 5-7. Installation space.
Type
Heat dissi-
pation
(W)
Minimum air holes on
switchgear (mm2)
CHK-0650-6
890
30000
Table 5-4. Required cooling air for the AC choke.
Installation vacon 32
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5.2.3

Arranging ventilation of the enclosure

The enclosure door must be provided with air gaps for air intake. To achieve sufficient cooling inside the cabinet, the dimensions for the total area of free openings for incoming air given in Table 5-2 and Table 5-4 must be followed. For instance, there could be two screened gaps as presented in Figure 5-8 ( s recommendation). This layout ensures a sufficient air flow to the module fans as well as cooling of the additional components.
Air outlet gaps must be situated on top of the cabinet. The minimum effective air outlet area per unit frame is given in Table 5-2 and Table 5-4. The cooling arrangements inside the cabinet must be such that they prevent hot output air from mixing with the incoming fresh air (see Chapter 5.2.4).
The ventilation gaps must fulfill the requirements set by the selected IP class. The examples in this manual apply to protection class IP21.
During operation, air is sucked in and circulated by a fan blower at the bottom of the power unit. If the power unit is placed in the upper part of the cabinet, the fan blower will be in the mid of the cabi­net, at the height of the upper ventilation grid. In case of the AC choke is installed below the Non­Regenerative Front End unit air inlet 1.1 in Figure 5-8 cannot be used.
vacon 33 Installation
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Figure 5-8. Cabinet openings for cooling.
1. Cooling air inlets
2. Hot air exhaust
1.1
2
2
1.2
Installation vacon 34
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5.2.4

Steering air flow

Cooling air must be taken in through the ventilation gaps on the door and blown out at the top of the enclosure. To steer the hot air from the power unit to the outlet at the top of the enclosure and pre­vent it from circulating back to the fan blower, use either of the following arrangements:
A. Install a closed air duct from the power unit to the outlet on top of the enclosure (A in figures below).
B. Install shields in the gaps between the power unit and the cabinet walls (B in figures below). Place the shields above the air outlet gaps at the sides of the module.
Figure 5-9. Cabinet cooling airflow guides.
The sheet metal airflow guides (deflectors) prevents air circulation between different sections of the equipment. The shield guides in prevent air circulation inside a section. The exhaust air holes must not be covered, nor must anything be placed above them to stop the free exit of warm air from inside the equipment. The cooling air intake holes must not be blocked in any way.
The materials used for preventing the circulation of air inside the equipment must be fire-restraining. The edges must be sealed to prevent the formation of gaps. When the deflectors are made according to the instructions, no separate cooling fan is required.
NOTE! The deflectors must be installed above the air intake holes on the top (in the front) of the unit. NOTE! If a flat roof is used, mount a V-shaped air guide on the underside of the roof to direct the air
flow horizontally. See Figure 5-10.
vacon 35 Installation
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Figure 5-10. Roof structure seen from the side

5.3 Power connection

5.3.1

AC connection

The 3-phase input is connected to the input terminals of the AC choke (L1, L2 and L3), see Figure 5-12. Used input terminal are selected by supply voltage. The output terminals of the AC choke (L1, L2 and L3) are connected to the input terminals of the NFE unit (L1, L2 and L3), see Figure 5-11. The AC input of the NFE input group must be protected against short circuit. The fuses suitable for pro­tection are shown in Section 4.9. A circuit breaker can also be used for protection, see Section 4.10. The best short-circuit protection is achieved by using fuses. The short-circuit protection must be on the input side when seen from the AC choke, Figure 4-2.
A cable or busbar designed for the purpose must be used to make the connection. The connection must be dimensioned according to the nominal current rating of the Non-Regenerative Front End. The necessary overloading allowance must also be used. The connection must also have the same short-circuit capacity as the whole system. The connecting cable or busbar may be of copper or al­uminium. When aluminium is used, steps must be taken to prevent corrosion. The dimensions of the terminals in the unit are indicated in Appendix 7-6.
Figure 5-11. FI9 unit AC connection.
Installation vacon 36
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Figure 5-12. AC choke connections.
5.3.2

DC connection

The DC connection of the Non-Regenerative Front End unit is connected to the terminals at the top, see Figure 5-13. The terminals are marked as B+ for connection to DC+ and B- for connection to DC­. The DC connection must be protected using DC fuses, see Section 4.9. The terminal dimensions are shown in Appendix 7-6.
Figure 5-13. FI9 unit DC connection.

5.4 Cable installation and the UL standards

To meet the UL (Underwriters Laboratories) regulations, a UL-approved copper cable with a mini­mum heat-resistance of +60/75C must be used.
Use Class 1 wire only.
The units are suitable for use on a circuit capable of delivering not more than 100,000 rms symmetrical amperes, 600 V maximum, or equivalent when protected by class J, T or Semiconductor fuses.
The tightening torques of the terminals are given below in Table 5-1.
L 1 L 2 L 3 V o l t a g e / F r e q u e n c y V o l t a g
e / F r e q u e n c y 5 0 0 V / 5 0 H z 5 7 5 V / 6 0 H z 6 9 0 V / 5 0 H z 4 0 0 V / 5 0 H z 4 8 0 V / 6 0 H z 5 2 5 V / 5 0 H z C a b l e s / b u s b a r s t o N F E u n i t C a b l e s / b u s b a r
s t o N F E u n i t T e r m i n a l s f o r s u p p l y c a b l e
s
vacon 37 Installation
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Type
DC terminals
Tightening torque [Nm]
AC terminals
Tightening torque [Nm]
Bolt Ø
Min
Nom
Max
Bolt Ø
Min
Nom
Max
NXN_0650 6
M12
65
70
75
M10
35
40
45
Table 5-1. Tightening torques of terminals

5.5 I/O terminals and I/O signals

I/O terminals can be found under the cover of Control box, see Figure 5-14 and 5-15. Descriptions of I/O signals see Figure 5-16.
NOTE! Digital signal out is open collector type.
Figure 5-14. Open the cover.
Installation vacon 38
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Strip the plastic cable coating for 360°earthing
Control cable tightening torque: 0.4 Nm
Figure 5-15. Cabling.
vacon 39 Installation
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Terminal
Signal
Factory preset
Description
1
+10Vre
Ref. Voltage out
Not used
2
AI1
Analog signal in 1
Not used
3
GND
I/O signal ground
6
24Vout
24V output for DI's
7
GND
I/O signal ground
8
DI1
Digital input 1
0 = STOP 1 = START
9
DI2
Digital input 2
Not used
10
DI3
Digital input 3
1 = RESET
A A RS485 signal A
Not used
B B RS485 signal B
Not used
4
AI2
Analog signal in 2
Not used
5
GND
I/O signal ground
13
GND
I/O signal ground
14
DI4
Digital input 4
Not used
15
DI5
Digital input 5
Not used
16
DI6
Digital input 6
Not used
18
AO
Analog signal out
0 = Not used 1 = DC voltage 2 = Current
20
DO
Digital signal out 0 = Not used
1 = Ready 2 = Running 3 = Fault 4 = Fault inverted 5 = Warning
22
RO11
Relay out 1
0 = Not used 1 = Ready 2 = Running 3 = Fault 4 = Fault inverted 5 = Warning
23
RO12 24
RO21
Relay out 2
0 = Not used 1 = Ready 2 = Running 3 = Fault 4 = Fault inverted 5 = Warning
25
RO22
26
RO23
Figure 5-16. I/O signals.
Control keypad vacon 40
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6. CONTROL KEYPAD

The control keypad is the link between VACON® NX Non-Regenerative Front End and the user. The control keypad features an alphanumeric display and indicators for the status (READY, RUN, STOP, ALARM, FAULT) and four indicators for the active menu (REF, MON, PAR, FLT). There are also three Status Indica green red).
The control information, i.e. the menu number, description of the menu or the displayed value and the numeric information are presented on three text lines.
The navigation wheel is used for navigating on the panel display. The wheel has two separate func­tions;
- rotating the wheel e.g. for changing parameter value (12 steps / round)
- pressing the wheel e.g. for accepting the new value.
vacon 41 Control keypad
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6.1 Navigation

Hz Hz
FWD REV I/O KEYPAD BUS
REF
MON
PAR
FLT
FAULTALARMSTOPREADY RUN
FWD REV I/O KEYPAD BUS
REF
PAR
FLT
FAULTALARMSTOPREADY RUN
MON
PUSH
FWD REV I/O KEYPAD BUS
REF
PAR
FLT
FAULTALARMSTOPREADY RUN
MON
FWD REV I/O KEYPAD BUS
REF
PAR
FLT
FAULTALARMSTOPREADY RUN
MON
PUSH
FWD REV I/O KEYPAD BUS
REF
PAR
FLT
FAULTALARMSTOPREADY RUN
MON
FWD REV I/O KEYPAD BUS
REF
PAR
FLT
FAULTALARMSTOPREADY RUN
MON
PUSH
FWD REV I/O KEYPAD BUS
REF
PAR
FLT
FAULTALARMSTOPREADY RUN
MON
ROTATE
ROTATE
ROTATE
REFERENCE MENU
Displays the keypad reference value regardless of the selected control place.

MONITORING MENU

In this menu you can browse the monitoring values.
PARAMETER MENU
In this menu you can browse and edit the parameters.
FAULT MENU
Here you will be able to browse through the faults occurred.
PUSH
FWD REV I/O KEYPAD BUS
REF
MON
PAR
FLT
FAULTALARMSTOPREADY RUN
Figure 6-1. Navigation
6.1.1
Monitoring menu
Monitoring values mean actual values of measured signals as well as statuses of some control set­tings. Monitoring values are listed in Table 6-1.
Pushing the navigation wheel once in this menu takes the user to the next level, where the monitor­ing value, e.g. M1.1 and value is visible (see Figure 6-2). The monitoring values can be browsed by rolling the navigation wheel clockwise.
Control keypad vacon 42
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Hz
FAULTALARMSTOPREADY RUN
REF
MON
PAR
FLT
FWD REV I/O KEYPAD BUS
Alternates in the display
Browse M1.1 - M1.20
Figure 6-2. Monitoring menu
Code
Parameter
Scale
Unit
Description
M1.1
U_DCLINK
1 V DC voltage
M1.2
IL1 1 A
Current of phase 1
M1.3
IL2 1 A
Current of phase 2
M1.4
IL3 1 A
Current of phase 3
M1.5
UL12
1 V Voltage between phases L1-L2
M1.6
UL23
1 V Voltage between phases L2-L3
M1.7
UL31
1 V Voltage between phases L3-L1
M1.8
Isum
1 A Total average AC current
M1.9
Temp
1
˚C
Unit Temperature
Table 6-1. Monitoring signals.
6.1.2

Parameter menu

In Parameter menu all settable parameters are visible. The parameters can be browsed by rolling the navigation wheel clockwise. Pushing the navigation wheel once in this menu takes the user to the next level, where the parameter value, e.g. P3.1 and value is visible (see Figure 6-3). Parameters are listed below.
The following figure shows the parameter menu view:
vacon 43 Control keypad
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Hz
FAULTALARMSTOPREADY RUN
REF
MON
PAR
FLT
FWD REV I/O KEYPAD BUS
Alternates in the display
Browse P1.1 ->
Push to enter edit mode
Change value
Push to confirm
Figure 6-3. Parameter menu
Digital outputs
Code
Parameter
Min
Max
Default
Unit
Description
P1.1
Relay output 1
0 5 0
0 = Not used 1 = Ready 2 = Running 3 = Fault active 4 = Fault inverted 5 = Warning active
P1.2
Relay output 2
0 5 0
0 = Not used 1 = Ready 2 = Running 3 = Fault active 4 = Fault inverted 5 = Warning active
P1.3
Digital output 1
0 5 0
0 = Not used 1 = Ready 2 = Running 3 = Fault active 4 = Fault inverted 5 = Warning active
Analog outputs
Code
Parameter
Min
Max
Default
Unit
Description
P2.1
Analog output funtion
0 2 0
0 = Not used 1 = DC voltage 2 = Current
P2.2
Analog output minimum
0 1 0
0 = 0mA 1 = 4mA
P2.1 Analog output function
If the DC voltage is selected scaling is 0/4mA = 0VDC and 20mA = 1000VDC. If the current is selected scaling is 0/4mA = 0A and 20mA = 650A.
Control keypad vacon 44
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NFE parameters
Code
Parameter
Min
Max
Default
Unit
Description
P3.1
Load time limit
1
20
10
s
P3.2
Over voltage limit
440
1300
1300
V
P3.3
Over current limit
51
1014
780
A
P3.1 Load time limit
If the pre-charging is longer than the level set by this parameter then loading time fault is triggered.
P3.2 Over voltage limit
If the DC link voltage is higher than the level set by this parameter then over voltage fault is triggered.
P3.3 Over current limit
If the input current is higher than the level set by this parameter then over current fault is triggered.
6.1.3

Fault history menu

In Fault history menu you can browse through 9 latest faults (see Figure 6-4). If a fault is active, the relevant fault number (e.g. F2) alternates in the display with main menu. When you browse between the faults, the fault codes of active faults are blinking. The active faults can be reset by pressing the STOP button for 1 second. If the fault cannot be reset, the blinking continues. It is possible to navi­gate in the menu structure also when there are active faults present, but the display returns auto­matically to the fault menu if buttons or navigation wheel are not pressed or navigation is not rotat­ed. The operating hour, minute and second values at the fault instant are shown in the value menu (operating hours = displayed reading x 1000 h). Fault codes are listed in Table 6-2.
vacon 45 Control keypad
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FAULTALARMSTOPREADY RUN
REF
MON
PAR
FLT
FWD REV I/O KEYPAD BUS
FAULTALARMSTOPREADY RUN
REF
MON
PAR
FLT
FWD REV I/O KEYPAD BUS
FAULTALARMSTOPREADY RUN
REF
MON
PAR
FLT
FWD REV I/O KEYPAD BUS
FAULTALARMSTOPREADY RUN
REF
MON
PAR
FLT
FWD REV I/O KEYPAD
Browse faults 1-9
Push
Push
Browse for hours (H), minutes (M) and seconds (S)
Figure 6-4. Fault history menu
Note! The whole fault history can be cleared by pressing STOP button for 5 sec time
when the drive is stopped and fault history menu is selected in the display.
Note! If STOP button is pressed for 5 sec and no any menu is selected in the display fac-
tory reset is done. Factory reset set all parameters to default values!
Fault
Description
Default limit value
F1
Over current
780 A
F2
Over voltage
1300 Vdc
F4
Loading time fault
10 s
F8
System Fault
F9
Under voltage
(Supply voltage * 0.8*1.35)
F11
Input phase loss
F13
Under temperature
<-10 / ˚C
F14
Over temperature
>80 / ˚C
F22
EEPROM fault
F32
Fan/Inverter fault
F99
Communication interrupted API/Power
Table 6-2. Fault codes.
Control keypad vacon 46
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6.1.4
System menu

Code
Parameter
Description
S1.1
API SW ID
S1.2
API SW Version
S1.3
Power SW ID
S1.4
Power SW Version
S1.5
Application SW ID
S1.6
Application SW Version)
S1.7
CPU Load
Table 6-3. System menu signals.
vacon 47 Appendices
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7

7. APPENDICES

Appendix 7-1. Circuit diagram for NFE.

Appendices vacon 48
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Appendix 7-2. Circuit diagram for parallel connected NFE.

vacon 49 Appendices
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Appendix 7-3. Circuit diagram for 12- pulse solution with NFE.

Appendices vacon 50
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Appendix 7-4. FI9 Dimensions
vacon 51 Appendices
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Appendix 7-5. AC choke dimensions
Enclosure
Type
IL
[A]
DC terminal
AC Terminal
NXN_0650 6
FI9
650
PE: M8×25
Appendix 7-6.Terminal sizes for VACON
®
NX Non-regenerative Front End unit.
40
13
35
16
6 x 40
13
38
17
www.danfoss.com
Vacon Ltd
Member of the Danfoss Group
Runsorintie 7 65380 Vaasa Finland
Document ID:
DPD01172C
Rev. C
Sales code: DOC-USERNXNNFE+DLUK
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