The purpose of this manual is to provide information for
the installation and operation of a VLT® AutomationDrive
FC 302 Low Harmonic Drive. The manual includes relevant
safety information for installation and operation.
Chapter 1 Introduction, chapter 2 Safety,
chapter 3 Mechanical Installation, and chapter 4 Electrical
Installation introduce the unit functions and cover proper
mechanical and electrical installation procedures. There are
chapters on start-up and commissioning, applications and
basic troubleshooting. Chapter 8 Specications provides a
quick reference for ratings and dimensions, as well as other
operating specications. This manual provides a basic
knowledge of the unit and explains set-up and basic
operation.
VLT® is a registered trademark.
1.2 Additional Resources
Other resources are available to understand advanced
functions and programming.
The VLT® AutomationDrive FC 302 Programming
•
Guide provides greater detail on working with
parameters and many application examples.
®
The VLT
•
provides detailed capabilities and functionality to
design motor control systems.
Supplemental publications and manuals are
•
available from Danfoss.
See vlt-drives.danfoss.com/Support/Technical-Documentation/ for listings.
Optional equipment may change some of the
•
procedures described. Reference the instructions
supplied with those options for specic
requirements. Contact the local Danfoss supplier
or visit the Danfoss website: vlt-
drives.danfoss.com/Support/TechnicalDocumentation/ for downloads or additional
information.
The VLT
•
Instructions provide additional information about
the lter portion of the low harmonic drive.
AutomationDrive FC 302 Design Guide
®
Active Filter AAF 006 Operating
1.3
Product Overview
1.3.1 Intended Use
A frequency converter is an electronic motor controller
that converts AC mains input into a variable AC waveform
output. The frequency and voltage of the output are
regulated to control the motor speed or torque. The
frequency converter can vary the speed of the motor in
response to system feedback, such as with position sensors
on a conveyor belt. The frequency converter can also
regulate the motor by responding to remote commands
from external controllers.
The frequency converter:
Monitors the system and motor status.
•
Issues warnings or alarms for fault conditions.
•
Starts and stops the motor.
•
Optimises energy eciency.
•
Operation and monitoring functions are available as status
indications to an outside control system or serial communication network.
A low harmonic drive (LHD) is a single unit that combines
the frequency converter with an advanced active lter
(AAF) for harmonic mitigation. The frequency converter
and lter are packaged together in an integrated system,
but each functions independently. In this manual, there are
separate specications for the frequency converter and the
lter. Since the frequency converter and lter are in the
same enclosure, the unit is transported, installed, and
operated as a single entity.
VLT® AutomationDrive FC 302 Low Harmonic Drive
132-630 kW
1
1.3.2 Working Principle
The low harmonic drive is a high-power frequency converter with an integrated active lter. An active lter is a device that
actively monitors harmonic distortion levels and injects compensative harmonic current onto the line to cancel the
harmonics.
Illustration 1.1 Basic Layout for the Low Harmonic Drive
Low harmonic drives are designed to draw an ideal sinusoidal current waveform from the supply grid with a power factor of
1. Where traditional non-linear load draws pulse-shaped currents, the low harmonic drive compensates that via the parallel
lter path, lowering the stress on the supply grid. The low harmonic drive meets the highest harmonic standards with a
THDi less than 5% at full load for <3% pre-distortion on a 3% unbalanced 3-phase grid.
1Control card14SCR and diode
2Control input terminals15Fan inductor (not on all units)
3Local control panel (LCP)16Soft charge resistor assembly
4Control card C option17IGBT output bus bar
5Mounting bracket18Fan assembly
6Power card mounting plate19Output motor terminals
7Power card20Current sensor
8IGBT gate drive card21Mains AC power input terminals
9Upper capacitor bank assembly22Input terminal mounting plate
10Soft charge fuses23AC input bus bar
11DC inductor24Soft charge card
12Fan transformer25Lower capacitor bank assembly
13IGBT module
Illustration 1.4 Enclosure Size E9, Frequency Converter Enclosure
1Rectier module8Module heat sink fan
2DC bus bar9Fan door cover
3SMPS fuse10SMPS fuse
4(Optional) back AC fuse mounting bracket11Power card
5(Optional) middle AC fuse mounting bracket12Panel connectors
6(Optional) front AC fuse mounting bracket13Control card
7Module lifting eye bolts (mounted on a vertical strut)
VLT® AutomationDrive FC 302 Low Harmonic Drive
132-630 kW
1Fan transformer9Fan door cover
2DC-link inductor10Module heat sink fan
3Top cover plate11Inverter module
4MDCIC board12Panel connectors
5Control card13DC fuse
6SMPS fuse and fan fuse14Mounting bracket
7Motor output bus bar15(+) DC bus bar
8Brake output bus bar16(-) DC bus bar
For compliance with the European Agreement concerning
International Carriage of Dangerous Goods by Inland
Waterways (ADN), refer to ADN-compliant Installation in the
Design Guide.
1.6 Harmonics Overview
1.6.1 Harmonics
Non-linear loads such as found with 6-pulse frequency
converters do not draw current uniformly from the power
line. This non-sinusoidal current has components which are
multiples of the fundamental current frequency. These
components are referred to as harmonics. It is important to
control the total harmonic distortion on the mains supply.
Although the harmonic currents do not directly aect
electrical energy consumption, they generate heat in
wiring and transformers and can impact other devices on
the same power line.
Since harmonics increase heat losses, it is important to
design systems with harmonics in mind to prevent
overloading the transformer, inductors, and wiring.
When necessary, perform an analysis of the system
harmonics to determine equipment eects.
A non-sinusoidal current is transformed with a Fourier
series analysis into sine-wave currents at dierent
frequencies, that is, dierent harmonic currents IN with 50
Hz or 60 Hz as the fundamental frequency.
AbbreviationDescription
f
1
I
1
U
1
I
n
U
n
nHarmonic order
Table 1.3 Harmonics-related Abbreviations
Fundamental
CurrentI
Frequency
[Hz]
Table 1.4 Fundamental and Harmonic Currents
CurrentHarmonic current
I
Input current1.00.90.50.2< 0.1
Fundamental frequency (50 Hz or 60 Hz)
Current at the fundamental frequency
Voltage at the fundamental frequency
Current at the nth harmonic frequency
Voltage at the nth harmonic frequency
Harmonic current (In)
current (I1)
RMSI1
I
5
1
50250350550
I
7
I
I
5
7
I
11-49
I
11
Table 1.5 Harmonic Currents Compared to the RMS Input
Current
The voltage distortion on the mains supply voltage
depends on the size of the harmonic currents multiplied
VLT® AutomationDrive FC 302 Low Harmonic Drive
132-630 kW
1
by the mains impedance for the frequency in question. The
total voltage distortion (THDi) is calculated based on the
individual voltage harmonics using this formula:
THDi =
U25 + U27 + ... + U2n
U
1.6.3 Eect of Harmonics in a Power
Distribution System
In Illustration 1.10, a transformer is connected on the
primary side to a point of common coupling PCC1, on the
medium voltage supply. The transformer has an impedance
Z
and feeds a number of loads. The point of common
xfr
coupling where all loads are connected is PCC2. Each load
is connected through cables that have an impedance Z1,
Z2, Z3.
PCC, the conguration of the distribution system and
relevant impedances must be known.
A commonly used term for describing the impedance of a
grid is the short-circuit ratio R
. R
is dened as the ratio
sce
sce
between the short circuit apparent power of the supply at
the PCC (Ssc) and the rated apparent power of the load
(S
).
equ
S
sce
sc
=
S
equ
2
U
Z
supply
and S
=
sc
equ
= U × I
equ
R
where S
Negative eects of harmonics
Harmonic currents contribute to system losses (in
•
cabling, and transformer).
Harmonic voltage distortion causes disturbance
•
to other loads and increases losses in other loads.
PCCPoint of common coupling
MVMedium voltage
LVLow voltage
Z
xfr
Z
#
Illustration 1.10 Small Distribution System
Transformer impedance
Modeling resistance and inductance in the
wiring
Harmonic currents drawn by non-linear loads cause
distortion of the voltage because of the voltage drop on
the impedances of the distribution system. Higher
impedances result in higher levels of voltage distortion.
Current distortion relates to apparatus performance and it
relates to the individual load. Voltage distortion relates to
system performance. It is not possible to determine the
voltage distortion in the PCC knowing only the harmonic
performance of the load. To predict the distortion in the
The mains voltage is rarely a uniform sinusoidal voltage with constant amplitude and frequency because loads that draw
non-sinusoidal currents from the mains have non-linear characteristics.
Harmonics and voltage uctuations are 2 forms of low-frequency mains interference. They have a dierent appearance at
their origin than at any other point in the mains system when a load is connected. So, a range of inuences must be
determined collectively when assessing the eects of mains interference. These inuences include the mains feed, structure,
and loads.
Mains interference can cause the following:
Undervoltage warnings
Incorrect voltage measurements due to distortion of the sinusoidal mains voltage.
•
Cause incorrect power measurements because only RMS-true measuring takes harmonic content into account.
•
Higher functional losses
Harmonics reduce the active power, apparent power, and reactive power.
•
Distort electrical loads resulting in audible interference in other devices, or in worst case, even destruction.
•
Shorten the lifetime of devices as a result of heating.
•
1
1
In most of Europe, the basis for the objective assessment of the quality of mains power is the Electromagnetic Compatibility
of Devices Act (EMVG). Compliance with these regulations ensures that all devices and networks connected to electrical
distribution systems
StandardDenition
EN 61000-2-2, EN 61000-2-4, EN 50160Dene the mains voltage limits required for public and industrial power grids.
EN 61000-3-2, 61000-3-12Regulate mains interference generated by connected devices in lower current products.
EN 50178Monitors electronic equipment for use in power installations.
Table 1.6 EN Design Standards for Mains Power Quality
There are 2 European standards that address harmonics in the frequency range from 0 Hz to 9 kHz:
EN 61000-2-2 (Compatibility Levels for Low-Frequency Conducted Disturbances and Signalling in Public Low-Voltage Power
Supply Systems) states the requirements for compatibility levels for PCC (point of common coupling) of low-voltage AC
systems on a public supply network. Limits are specied only for harmonic voltage and total harmonic distortion of the
voltage. EN 61000-2-2 does not dene limits for harmonic currents. In situations where the total harmonic distortion
THD(V)=8%, PCC limits are identical to those limits specied in the EN 61000-2-4 Class 2.
EN 61000-2-4 (Compatibility Levels for Low-Frequency Conducted Disturbances and Signalling in Industrial Plants) states the
requirements for compatibility levels in industrial and private networks. The standard further denes the following 3 classes
of electromagnetic environments:
Class 1 relates to compatibility levels that are less than the public supply network, which
•
sensitive to disturbances (lab equipment, some automation equipment, and certain protection devices).
Class 2 relates to compatibility levels that are equal to the public supply network. The class applies to PCCs on the
•
public supply network and to IPCs (internal points of coupling) on industrial or other private supply networks. Any
equipment designed for operation on a public supply network is allowed in this class.
Class 3 relates to compatibility levels greater than the public supply network. This class applies only to IPCs in
•
industrial environments. Use this class where the following equipment is found:
full their intended purpose without generating problems.
VLT® AutomationDrive FC 302 Low Harmonic Drive
132-630 kW
1
Large converters.
-
Welding machines.
-
Large motors starting frequently.
-
Loads that change quickly.
-
Typically, a class cannot be dened ahead of time without taking into account the intended equipment and processes to be
used in the environment. VLT® AutomationDrive FC 302 Low Harmonic Drive observes the limits of Class 3 under typical
supply system conditions (RSC>10 or
Harmonic order (h)Class 1 (Vh%)Class 2 (Vh%)Class 3 (Vh%)
5368
7357
1133.55
13334.5
17224
17˂h≤492.27 x (17/h) – 0.272.27 x (17/h) – 0.274.5 x (17/h) – 0.5
Table 1.7 Compatibility Levels for Harmonics
Class 1Class 2Class 3
THD(V)
Table 1.8 Compatibility Levels for the Total Harmonic Voltage Distortion THD(V)
Vk Line
<10%).
5%8%10%
IEEE Harmonic Standards
1.6.5
The IEEE 519 standard (Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems)
provides specic limits for harmonic voltages and currents for individual components within the supply network. The
standard also provides limits for the sum of all loads at the point of common coupling (PCC).
To determine permissible harmonic voltage levels, IEEE 519 uses a ratio between the supply short-circuit current and the
maximum current of the individual load. For permissible harmonic voltage levels for individual loads, see Table 1.9. For
permissible levels for all loads connected to the PCC, see Table 1.10.
ISC/IL (R
102.5–3%Weak grid
202.0–2.5%1–2 large loads
501.0–1.5%A few high-output loads
1000.5–1%5–20 medium-output loads
10000.05–0.1%Strong grid
Table 1.9 Permissible Voltage THD at the PCC for Each Individual Load
Voltage at the PCCPermissible individual harmonic voltagesPermissible THD(V)
V
Line
Table 1.10 Permissible Voltage THD at the PCC for all Loads
)Permissible individual harmonic voltagesTypical areas
SCE
≤69 kV3%5%
Limit harmonic currents to
specied levels, as shown in Table 1.11. IEEE 519 utilises a ratio between the supply short-circuit
current and the maximum current consumption at the PCC, averaged over 15 minutes or 30 minutes. In certain instances
when dealing with harmonic limits containing low harmonic numbers, the IEEE 519 limits are lower than the 61000-2-4
limits. Low harmonic drives observe the total harmonic distortion as dened in IEEE 519 for all R
harmonic current fullls table 10–3 in IEEE 519 for R
VLT® AutomationDrive FC 302 Low Harmonic Drive
132-630 kW
2.3
Safety Precautions
The following symbols are used in this document:
WARNING
Indicates a potentially hazardous situation which could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which could
result in minor or moderate injury. It may also be used
to alert against unsafe practices.
NOTICE
Indicates important information, including situations that
may result in damage to equipment or property.
2.2 Qualied Personnel
Correct and reliable transport, storage, installation,
operation and maintenance are required for the safe
operation of the frequency converter. Only qualied
personnel are allowed to install or operate this equipment.
Qualied personnel is dened as trained sta, who are
authorised to install, commission, and maintain equipment,
systems and circuits in accordance with pertinent laws and
regulations. Additionally, qualied personnel are familiar
with the instructions and safety measures described in this
document.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input power. Qualied personnel
only should perform installation, start up, and
maintenance. Failure to perform installation, start up,
and maintenance by qualied personnel could result in
death or serious injury.
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
the motor may start at any time. The frequency
converter, motor, and any driven equipment must be in
operational readiness. Failure to be in operational
readiness when the frequency converter is connected to
AC mains could result in death, serious injury,
equipment, or property damage.
WARNING
DISCHARGE TIME
Frequency converters contain DC-link capacitors that can
remain charged even when the frequency converter is
not powered. To avoid electrical hazards, disconnect AC
mains, any permanent magnet type motors, and any
remote DC-link power supplies, including battery backups, UPS, and DC-link connections to other frequency
converters. Wait for the capacitors to fully discharge
before performing any service or repair work. The
amount of wait time is listed in the Discharge Time table.
Failure to wait the specied time after power has been
removed before doing service or repair could result in
death or serious injury.
CAUTION:
See manual for special condition/mains fuse
voir manual de conditions speclales/fusibles
WARNING:
Stored charge, wait 4 min.
Charge residuelle, attendez 4 min.
* 1 3 1
X
3 5 3 7 0 1 0 1 2 2 G 4 3 0 *
`
Automation Drive
www.danfoss.com
T/C: FC-302PK37T2E20H1BGXXXXSXXXXA6BKC4XXXD0
Listed 76X1 E134261 Ind. Contr. Eq.
o
`
1
2
4
5
6
7
8
9
10
3
Mechanical Installation
VLT® AutomationDrive FC 302 Low Harmonic Drive
132-630 kW
3.2 Unpacking
3.2.1 Items Supplied
Items supplied may vary according to product congu-
ration.
33
Make sure that the items supplied and the
•
information on the nameplate correspond to the
order conrmation.
Check the packaging and the frequency converter
•
visually for damage caused by inappropriate
handling during shipment. File any claim for
damage with the carrier. Retain damaged parts
for clarication.
1Type code
2Order number
3Serial number
4Power rating
Input voltage, frequency and current (at low/high
5
voltages)
Output voltage, frequency and current (at low/high
6
voltages)
7Enclosure type and IP rating
8Maximum ambient temperature
9Certications
10Discharge time (Warning)
Illustration 3.1 Product Nameplate (Example)
NOTICE
Do not remove the nameplate from the frequency
converter (loss of warranty).
Obtain cooling by taking air in through the plinth in the front and out of the top, in and out the back of the unit, or by
combining the cooling possibilities.
Back cooling
The backchannel air can also be ventilated in and out the back. This
from outside the facility and return the heat losses outside the facility thus reducing air-conditioning requirements.
Airow
Secure the necessary airow over the heat sink. The ow rate is shown in Table 3.1.
oers a solution where the backchannel could take air
33
Enclosure protectionEnclosure size
D1n
D2n
IP21/NEMA 1
IP54/NEMA 12
Table 3.1 Heat Sink Air Flow
E9
F18
NOTICE
For the frequency converter section, the fan runs for the
following reasons:
AMA.
•
DC hold.
•
Pre-mag.
•
DC brake.
•
60% of nominal current is exceeded.
•
Specic heat sink temperature exceeded (power
•
size dependent).
Specic power card ambient temperature
•
exceeded (power size dependent).
Specic control card ambient temperature
•
exceeded.
Once the fan is started, it runs for minimum 10 minutes.
Door fan/top fan airow
Total airow of multiple fans
For the active lter, the fan runs for the following
reasons:
Active lter running.
•
Active lter not running, but mains current
•
exceeding the limit (power size dependent).
Specic heat sink temperature exceeded (power
•
size dependent).
Specic power card ambient temperature
•
exceeded (power size dependent).
Specic control card ambient temperature
•
exceeded.
Once the fan is started, it runs for minimum 10 minutes.
External ducts
If additional duct work is added externally to the Rittal
cabinet, calculate the pressure drop in the ducting. Use
Illustration 3.2, Illustration 3.3, and Illustration 3.4 to derate
the frequency converter according to the pressure drop.
VLT® AutomationDrive FC 302 Low Harmonic Drive
132-630 kW
Lifting
3.3.2
Lift the frequency converter using the dedicated lifting
eyes. For all D-frames, use a bar to avoid bending the
lifting holes of the frequency converter.
33
Illustration 3.2 D-Enclosure Derating vs. Pressure Change
Frequency Converter Air Flow: 450 cfm (765 m3/h)
The lifting bar must be able to handle the weight of the
frequency converter. See chapter 8.2 MechanicalDimensions for the weight of the dierent enclosure
sizes. Maximum diameter for bar is 2.5 cm (1 inch). The
angle from the top of the frequency converter to the
lifting cable should be 60° or greater.
1
2
130BD574.10
Mechanical InstallationOperating Instructions
1 Lifting holes for the lter
2 Lifting holes for the frequency converter
A spreader bar is also an acceptable way to lift the Fframe.
NOTICE
The F18 pedestal is packaged separately and included in
the shipment. Mount the frequency converter on the
pedestal in its nal location. The pedestal allows proper
airow and cooling.
VLT® AutomationDrive FC 302 Low Harmonic Drive
132-630 kW
3.3.3 Cable Entry and Anchoring
Cables enter the unit through gland plate openings in the bottom. Illustration 3.8, Illustration 3.9, Illustration 3.10, and
Illustration 3.11 show gland entry locations and detailed views of anchoring hole dimensions.