BONFIGLIOLI Vectron AEC Series User manual

Device Series
Active Energy Control
AEC 401
Operating Instructions

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TABLE OF CONTENTS
1General Information about the Documentation ............................................................ 6
1.1 Instructions ........................................................................................................ 6
1.2 This document .................................................................................................... 6
1.3 Warranty and liability......................................................................................... 7
1.4 Obligation ........................................................................................................... 8
1.5 Copyright ............................................................................................................ 8
1.6 Storage of documents ........................................................................................ 8
2General safety instructions and information on use...................................................... 9
2.1 Terminology........................................................................................................ 9
2.2 Designated use ................................................................................................. 10
2.3 Misuse............................................................................................................... 10
2.4 Residual risks ................................................................................................... 10
2.5 Safety and warning signs ................................................................................. 11
2.6 Warning information and symbols used in the Operating Instructions........... 11
2.6.1 Hazard classes ......................................................................................................... 11
2.6.2 Hazard symbols ........................................................................................................ 11
2.6.3 Prohibition signs ....................................................................................................... 12
2.6.4 Personal safety equipment ........................................................................................ 12
2.6.5 Recycling ................................................................................................................. 12
2.6.6 Grounding symbol .................................................................................................... 12
2.6.7 ESD symbol.............................................................................................................. 12
2.6.8 Information signs ..................................................................................................... 12
2.7 Font style in documentation............................................................................. 13
2.8 Directives and guidelines to be adhered to by the operator ............................ 13
2.9 Operator's general plant documentation ......................................................... 13
2.10 Operator's/operating staff's responsibilities ................................................... 13
2.10.1 Selection and qualification of staff ............................................................................. 13
2.10.2 General work safety.................................................................................................. 13
2.10.3 Ear protectors .......................................................................................................... 14
2.11 Organizational measures.................................................................................. 14
2.11.1 General.................................................................................................................... 14
2.11.2 Use in combination with third-party products ............................................................. 14
2.11.3 Transport and storage .............................................................................................. 14
2.11.4 Handling and installation........................................................................................... 14
2.11.5 Electrical connections................................................................................................ 15
2.11.6 The five safety rules ................................................................................................. 15
2.11.7 Safe operation.......................................................................................................... 15
2.11.8 Maintenance and service/troubleshooting................................................................... 16
2.11.9 Final decommissioning .............................................................................................. 16
3Description of function................................................................................................. 17
3.1 Sinusoidal feedback.......................................................................................... 17

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3.2 Block-shaped feedback .................................................................................... 19
4Storage and transport .................................................................................................. 20
4.1 Storage ............................................................................................................. 20
4.2 Special safety instructions on transport of heavy devices ............................... 21
4.3 Dimensions/weight .......................................................................................... 21
4.4 Transfer to place of installation ....................................................................... 21
4.5 Unpacking the device ....................................................................................... 22
4.6 Bringing the device into installation position .................................................. 22
4.6.1 Sizes 3 through 6 ..................................................................................................... 22
4.6.2 Sizes 7 and 8 ........................................................................................................... 22
5Scope of supply ............................................................................................................ 24
5.1 Size 3 and Size 4............................................................................................... 24
5.2 Size 5 ................................................................................................................ 25
5.3 Size 6 ................................................................................................................ 26
5.4 Size 7 ................................................................................................................ 27
5.5 Size 8 ................................................................................................................ 28
6Technical data .............................................................................................................. 29
6.1 Rating plate ...................................................................................................... 29
6.2 General technical data...................................................................................... 29
6.3 Technical Data –Control Electronic Equipment ............................................... 30
6.4 Technical data .................................................................................................. 31
6.4.1 Sizes 3 and 4 ........................................................................................................... 31
6.4.2 Size 5 ...................................................................................................................... 32
6.4.3 Size 6 ...................................................................................................................... 33
6.4.4 Size 7 ...................................................................................................................... 34
6.4.5 Size 8 ...................................................................................................................... 35
6.5 Operation diagrams.......................................................................................... 36
6.6 Extension modules ........................................................................................... 37
6.7 Application components required .................................................................... 38
6.7.1 Fuses....................................................................................................................... 38
6.7.2 Line choke ............................................................................................................... 39
6.7.3 Sine filter ................................................................................................................. 40
6.7.4 Radio interference filter ............................................................................................ 40
7Mechanical installation ................................................................................................ 42
7.1 Air circulation ................................................................................................... 43
7.2 Size 3 and Size 4............................................................................................... 44
7.3 Size 5 ................................................................................................................ 45
7.4 Size 6 ................................................................................................................ 46
7.5 Size 7 ................................................................................................................ 47

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7.6 Size 8 ................................................................................................................ 49
8Electrical installation.................................................................................................... 50
8.1 EMC-compliant installation .............................................................................. 50
8.2 Conductor cross-section................................................................................... 51
8.3 Connection of device ........................................................................................ 53
8.3.1 Control connections .................................................................................................. 54
8.3.2 Connection of auxiliary voltage, size 8 ....................................................................... 56
8.3.3 Mains unit power connection ..................................................................................... 57
8.3.4 Feed-back unit power connection .............................................................................. 64
8.4 DC link connection, frequency inverter with AEC ............................................ 71
9Commissioning and operation AEC .............................................................................. 72
9.1 Commissioning as mains unit........................................................................... 72
9.2 Commissioning as feed-back unit .................................................................... 72
10 Error and warning behavior ......................................................................................... 73
10.1 Overload Ixt ..................................................................................................... 73
10.2 Temperature ..................................................................................................... 73
11 Operational and error diagnosis .................................................................................. 75
11.1 List of errors ..................................................................................................... 75
11.1.1 Error messages ........................................................................................................ 75
11.1.2 Output signals in the case of error messages ............................................................. 77
11.2 Error environment ............................................................................................ 77
12 List of parameters ........................................................................................................ 79
12.1 Actual Value Menu (VAL).................................................................................. 79
12.2 Parameter Menu (PARA) .................................................................................. 81
12.3 AEC-relevant parameters ................................................................................. 83
12.3.1 Description of parameters ......................................................................................... 83
12.3.2 Parameter setting options ......................................................................................... 84

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1General Information about the Documentation
1.1 Instructions
For better clarity, the documentation is structured according to the customer-specific requirements made
on the device.
Quick Start Guide
The “Quick Start Guide” describes the basic steps required for mechanical and electrical installation of the
device. The guided commissioning supports you in the selection of necessary parameters and the
configuration of the frequency inverter by the software.
Operating Instructions
The Operating Instructions document the complete functionality of the device. The parameters required for
special purposes, for adjustment to the application and the numerous additional functions are described in
detail.
Application manual
The application manual supplements the documentation for purposeful installation and commissioning of
the device. Information on various topics in connection with the use of the device is described in context
with the specific application.
If you need a copy of the documentation or additional information, contact your local
representative of BONFIGLIOLI.
The following instructions are available for the AEC (ACTIVE Energy Control) series:
Operating Instructions AEC
Functionality of feed-back unit / mains unit.
Quick Start Guide AEC
Installation and commissioning supplied with the device.
Operating instructions Liquid Cooling
Supplemental
Special features of liquid-cooled frequency inverters
Application manual
Parallel connection
Parallel connection of Size 8 frequency inverters
Application Manual
Hoisting Gear Drives
Advanced brake control for hoist unit drives.
The products for CANopen® communication comply with the specifications of the user
organization CiA® (CAN in Automation).
The present documentation was prepared with great care and it was subjected to extensive and repeated
reviews. For reasons of clarity, it was not possible to include all details of all types of the product in the
documentation. Neither was it possible to consider all conceivable installation, operation or maintenance
situations. If you require further information or if you meet with specific problems which are not dealt with
in sufficient detail in the documentation, contact your local BONFIGLIOLI agent.
The present document was created in German. Other language versions are translations.
1.2 This document
This documentation applies to the following device series:
AEC 401

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This documentation describes the AEC device series mains unit / feed-back unit. The Operating Instructions
contain important information on the installation, use and specified application range of the product.
Compliance with this document contributes to avoiding risks, minimizing repair cost and downtimes and
increasing the reliability and service live of the device.
For this reason, make sure you read the Operating Instructions carefully.
IMPORTANT:
Compliance with the documentation is required to ensure safe operation of the device.
BONFIGLIOLI VECTRON MDS GmbH shall not be held liable for any damage caused by any non-
compliance with the documentation.
In case any problems occur which are not covered by the documentation sufficiently, please
contact the manufacturer.
For safe commissioning and operation of the AEC (ACTIVE Energy Control) series, the
following documentation must be complied with:
These Operating Instructions
Document “Quick Start Guide” which is enclosed with the delivery as a
standard.
In the following, the abbreviation “AEC” (ACTIVE Energy Control) is used both for the
“Mains Unit” and the “Feed-back Unit“. Wherever a certain description only refers to the
mains unit or the feed-back unit, the device will be mentioned accordingly.
The AEC series of devices can be identified by the corresponding rating plate. For the rating plate, refer to
chapter Rating plate.
In additions, the device series can be identified by its label on the case and the identification below the top
cover.
1.3 Warranty and liability
BONFIGLIOLI VECTRON MDS GmbH states that the contents of these Operating Instructions do not form
part of any previous or existing agreement, assurance or legal relationship. Neither are they intended to
supplement or replace such agreements, assurances or legal relationships. Any obligations of the
manufacturer shall solely be based on the relevant purchase agreement which also includes the complete
and solely valid warranty stipulations. These contractual warranty provisions are neither extended nor
limited by the specifications contained in this documentation.
The manufacturer reserves the right to correct or amend the specifications, product information and
omissions in these operating instructions without prior notice. The manufacturer assumes no responsibility
to update these Operating Instructions. The manufacturer shall not be liable for any damage, injuries or
costs which may be caused by the aforementioned reasons.
In addition, the manufacturer excludes any warranty and disclaims all liability, including, without limitation,
direct, indirect, special, punitive, incidental, exemplary or consequential damages arising out of or in
connection with one or more of the following causes:
inappropriate use of the device,
non-compliance with the instructions, warnings and prohibitions contained in the documentation,
unauthorized modifications of the device,
insufficient monitoring of parts of the machine/plant which are subject to wear,
repair work at the machine/plant not carried out properly or in time,
catastrophes by external impact and force majeure.

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1.4 Obligation
These Operating Instructions must be read before commissioning and complied with. Anybody entrusted
with tasks in connection with the
transport,
assembly,
installation of the device and
operation of the device
must have read and understood the Operating Instructions and, in particular, the safety instructions in order
to prevent personal and material losses.
1.5 Copyright
Copyright to this document remains with
Bonfiglioli Vectron MDS GmbH
Europark Fichtenhain B6
47807 Krefeld
Germany
These Operating Instructions are intended for the operator of the AEC and for their staff. Any disclosure or
copying of this document, exploitation and communication of its contents (as hardcopy or electronically)
shall be forbidden, unless permitted expressly.
All rights relating to patent, utility model or design registration reserved.
1.6 Storage of documents
The documentation form an integral part of the AEC. It must be stored such that it is accessible to operating
staff at all times. If the AEC is sold on to other users, then these Operating Instructions must also be handed
over.

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2General safety instructions and information on use
The chapter "General safety instructions and information on use" contains general safety instructions for
the Operator and the Operating Staff. At the beginning of certain main chapters, some safety instructions
are included which apply to all work described in the relevant chapter. Special work-specific safety
instructions are provided before each safety-relevant work step.
2.1 Terminology
According to the documentation, different activities must be performed by certain persons with certain
qualifications.
The groups of persons with the required qualification are defined as follows:
Operator
This is the entrepreneur/company who/which operates the AEC and uses it as per the specifications or has
it operated by qualified and instructed staff.
Operating staff
The term Operating Staff covers persons instructed by the Operator of the device and assigned the task of
operating the AEC.
Skilled Personnel
The term Skilled Personnel covers staff that are assigned special tasks by the Operator of the device, e.g.
installation, maintenance and service/repair and troubleshooting. Based on their qualification and/or know-
how, Skilled Personnel must be capable of identifying defects and assessing functions.
Qualified Electrician
The term Qualified Electrician covers qualified and trained staff that have special technical know-how and
experience with electrical installations. In addition, Qualified Electricians must be familiar with the applicable
standards and regulations, they must be able to assess the assigned tasks properly and identify and
eliminate potential hazards.
Mains unit
An AEC unit connected to a supply mains and frequency inverters via additional application components.
The mains unit uses energy supplied by the connected supply mains and for supplying the connected drives.
Regenerative energy produced in system operation, can be fed back into the connected mains (sine form)
by means of the mains unit.
Instructed Person
The term Instructed Person covers staff that are instructed and trained about/in the assigned tasks and the
potential hazards that might result from inappropriate behavior. In addition, Instructed Persons must have
been instructed in the required protection provisions, protective measures, the applicable directives,
accident prevention regulations as well as the operating conditions and verified their qualification.
Feed-back unit
An AEC unit connected to a supply mains and frequency inverters via additional application components.
The feed-back unit supplies the regenerative energy produced in system operation back into the connected
mains (block form). The drives connected in the system are supplied directly from the supply mains in this
case.

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Expert
The term Expert covers qualified and trained staff that have special technical know-how and experience
relating to AEC. Experts must be familiar with the applicable government work safety directives, accident
prevention regulations, guidelines and generally accepted rules of technology in order to assess the
operationally safe condition of the AEC.
2.2 Designated use
The product is an electric inverter unit. It is designed for
installation in machines and electrical equipment
industrial environments
AEC are electrical components intended for installation in industrial plants or machines. Commissioning and
start of operation is not allowed until it has been verified that the machine meets the requirements of the
EC Machinery Directive 2006/42/EC and DIN EN 60204-1.
The AEC inverter unit meets the requirements of the low voltage directive 2014/35/EU and DIN EN 61800-
5-1. CE-labeling is based on these standards. Responsibility for compliance with the EMC Directive
2014/30/EU lies with the operator. The AEC inverter units are only available at specialized dealers and are
exclusively intended for industrial use as per DIN EN 61000-3-2.
The technical data, connection specifications and information on ambient conditions are indicated on the
rating plate and in the documentation and must be complied with at all times.
2.3 Misuse
Any use other than that described in "Designated use" shall not be permissible and shall be considered as
misuse.
For, example, the machine/plant must not be operated
by uninstructed staff,
when the equipment is not in perfect condition,
without protection enclosure (e.g. covers),
without safety equipment or with safety equipment deactivated.
The manufacturer shall not be held liable for any damage resulting from such misuse. The sole risk shall be
borne by the operator.
Explosion protection
The AEC is an IP20 ingress protection rating device. For this reason, use of the device in explosive
atmospheres is not permitted.
2.4 Residual risks
Residual risks are special hazards involved in handling of the AEC which cannot be eliminated despite the
safety-compliant design of the device. Residual risks are not obviously identifiable and can be a potential
source of injury or a health hazard.
Typical residual hazards include:
Electrical hazard
Danger of contact with energized components due to a defect, opened covers or enclosures or improper
working on electrical equipment.
Danger of contact with energized components in the device if no external disconnection device was installed
by the operator.
Electrostatic charging
Touching electronic components entails the risk of electrostatic discharges.

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Thermal hazards
Risk of accidents by hot machine/plant surfaces, e.g. heat sink, transformer, fuse or sine filter.
Charged capacitors in DC link
The DC-link, depending on the device type, may have dangerous voltage levels even up to 8 minutes after
shutdown.
Danger of equipment falling down/over, e.g. during transport
Center of gravity is not the middle of the electrical cabinet modules.
2.5 Safety and warning signs
Comply with all safety instructions and danger information provided on the AEC.
Safety information and warnings on the device must not be removed.
2.6 Warning information and symbols used in the Operating Instructions
2.6.1 Hazard classes
The following hazard identifications and symbols are used in the Operating Instructions to mark particularly
important information:
DANGER
Identification of immediate threat holding a high risk of death or serious injury if not
avoided.
WARNING
Identification of immediate threat holding a medium risk of death or serious injury if not
avoided.
CAUTION
Identification of immediate threat holding a low risk of minor or moderate physical injury
if not avoided.
NOTE
Identification of a threat holding a risk of material damage if not avoided.
2.6.2 Hazard symbols
Symbol
Meaning
Symbol
Meaning
General hazard
Suspended load
Electrical voltage
Hot surfaces

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2.6.3 Prohibition signs
Symbol
Meaning
No switching; it is forbidden to switch the machine/plant, assembly on
2.6.4 Personal safety equipment
Symbol
Meaning
Wear body protection
2.6.5 Recycling
Symbol
Meaning
Recycling, to avoid waste, collect all materials for reuse
2.6.6 Grounding symbol
Symbol
Meaning
Ground connection
2.6.7 ESD symbol
Symbol
Meaning
ESD: Electrostatic Sensitive Devices, i.e. components and assemblies sensitive to
electrostatic energy
2.6.8 Information signs
Symbol
Meaning
Tips and information making using the device easier.

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2.7 Font style in documentation
Example
Font style
Use
1234
bold
Representation of parameter numbers
Parameter
inclined, font: Times New Roman
Representation of parameter names
1234
font: Courier New
Representation of parameter values and other values
P.1234
bold
Representation of parameter numbers without name, e.g.
in formulas
Q.1234
bold
Representation of source numbers

Bullet point
Indicates an action to be taken

Bullet dash
Indicates a list of items
2.8 Directives and guidelines to be adhered to by the operator
The operator must follow the following directives and regulations:
Ensure that the applicable workplace-related accident prevention regulations as well as other
applicable national regulation are accessible to the staff.
An authorized person must ensure, before using the AEC, that the device is used in compliance with
its designated use and that all safety requirements are met.
Additionally, comply with the applicable laws, regulations and directives of the country in which the
AEC is used.
Any additional guidelines and directives that may be required additionally shall be defined by the
operator of the machine/plant considering the operating environment.
2.9 Operator's general plant documentation
In addition to the Operating Instructions, the operator should issue separate internal user manuals for
the AEC. The Operating Instructions of the AEC must be included in the Operating Instructions of the
whole plant.
2.10 Operator's/operating staff's responsibilities
2.10.1 Selection and qualification of staff
Any work on the AEC may only be carried out by Skilled Personnel. The staff must not be under the
influence of any drugs. Note the minimum age required by law. Define the staff's responsibility
pertaining to all work on the AEC clearly.
Work on the electrical components may only be performed by a qualified electrician according to the
applicable rules of electrical engineering.
The operating staff must be trained for the relevant work to be performed.
2.10.2 General work safety
In addition to the Operating Instructions of the machine/plant, any applicable legal or other
regulations relating to accident prevention and environmental protection must be complied with. The
staff must be instructed accordingly.
Such regulations and/or requirements may include, for example, handling of hazardous media and
materials or provision/use of personal protective equipment.
In addition to these Operating Instructions, issue any additional directives that may be required to
meet specific operating requirements, including supervision and reporting requirements, e.g.
directives relating to work organization, workflow and employed staff.
Unless approved of expressly by the manufacturer, do not modify the AEC in any way, including
addition of attachments or retrofits.
Only use the AEC if the nominal connection and setup values specified by the manufacturer are met.
Provide appropriate tools as may be required for performing all work on the AEC properly.

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2.10.3 Ear protectors
The devices produce noise. For this reason they should be installed in areas where people normally
don't stay.
Noise emission in operation is < 85 dB(A) in the case of sizes 1 through 7.
Noise emission in operation is approx. 86 dB(A) in the case of size 8. Ear protectors must be used
when staying near the device
2.11 Organizational measures
2.11.1 General
Train your staff in the handling and use of the AEC and the machine/plant as well as the risks
involved.
Use of any individual parts or components of the AEC in other parts of the operator's machine/plant is
prohibited.
Optional components for the AEC must be used in accordance with their designated use and in
compliance with the relevant documentation.
2.11.2 Use in combination with third-party products
Please note that Bonfiglioli Vectron MDS GmbH will not accept any responsibility for compatibility with
third-party products (e.g. motors, cables or filters).
In order to enable optimum system compatibility, Bonfiglioli Vectron MDS GmbH offers components
facilitating commissioning and providing optimum synchronization of the machine/plant parts in
operation.
If you use the AEC in combination with third-party products, you do this at your own risk.
2.11.3 Transport and storage
The frequency inverters must be transported and stored in an appropriate way. During transport and
storage the devices must remain in their original packaging.
The units may only be stored in dry rooms which are protected against dust and moisture and are
exposed to small temperature deviations only. The requirements of DIN EN 60721-3-1 for storage,
DIN EN 60721-3-2 for transport and labeling on the packaging must be met.
The duration of storage without connection to the permissible nominal voltage may not exceed one
year.
2.11.4 Handling and installation
Do not commission any damaged or destroyed components.
Prevent any mechanical overloading of the AEC. Do not bend any components and never change the
isolation distances.
Do not touch any electronic construction elements and contacts. The AEC is equipped with
components which are sensitive to electrostatic energy and can be damaged if handled improperly.
Any use of damaged or destroyed components will endanger the machine/plant safety and result in
non-compliance with the applicable standards.
Only install the AEC in a suitable operating environment. The AEC is exclusively designed for
installation in industrial environments.
If seals are removed from the case, this can result in the warranty becoming null and void.

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2.11.5 Electrical connections
The five safety rules must be complied with.
Never touch live terminals. The DC-link may have dangerous voltage levels even up to 8 minutes after
shutdown.
When performing any work on/with the AEC, always comply with the applicable national and
international regulations/laws on work on electrical equipment/plants of the country in which the AEC
is used.
The cables connected to the AEC may not be subjected to high-voltage insulation tests unless
appropriate circuitry measures are taken before.
Only connect the AEC to suitable supply mains.
2.11.6 The five safety rules
When working on/in electrical plants, always follow the five safety rules:
1. Isolate
2. Secure to prevent restarting
3. Check isolation
4. Earth and short-circuit
5. Cover or shield neighboring live parts
2.11.7 Safe operation
During operation of the AEC, always comply with the applicable national and international
regulations/laws on work on electrical equipment/plants.
Before commissioning and the start of the operation, make sure to fix all covers and check the
terminals. Check the additional monitoring and protective devices according to the applicable national
and international safety directives.
During operation, never open the machine/plant.
Do not connect/disconnect any components/equipment during operation.
The machine/plant holds high voltage levels during operation, is equipped with rotating parts (fan)
and has hot surfaces. Any unauthorized removal of covers, improper use, wrong installation or
operation may result in serious injuries or material damage.
Some components, e.g. the heat sink or braking resistor, may be hot even some time after the
machine/plant was shut down. Do not touch any surfaces directly after shutdown. Wear safety gloves
where necessary.
The device may hold dangerous voltage levels until the capacitor in the DC link is discharged. After
shutdown, wait for at least 3 minutes (device sizes 3 through 7) and at least 8 minutes (device size 8)
before starting any electrical or mechanical work on the AEC. Even after this waiting time, make sure
that the equipment is deenergized in accordance with the safety rules before starting the work.
In order to avoid accidents or damage, only qualified staff and electricians may carry out the work
such as installation, commissioning or setup.
In the case of a defect of terminals and/or cables, immediately disconnect the device from power
supply.
Persons not familiar with the operation of AECs must not have access to the device. Do not bypass
nor decommission any protective devices.
Devices (sizes 3 through 7) disconnected from mains supply may only be reconnected after 60s.
Devices of size 8 my only be reconnected after 8 minutes. This must be considered when operating a
mains contactor in jog operation mode. For commissioning or after an emergency stop, a non-
recurrent, direct restart is permissible.
Before commissioning and the start of the operation, make sure to fix all covers and check the
terminals. Check the additional monitoring and protective devices according to EN 60204 and
applicable the safety directives (e.g. Working Machines Act or Accident Prevention Directives).

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2.11.8 Maintenance and service/troubleshooting
Visually inspect the device when carrying out the required maintenance work and inspections at the
machine/plant.
Perform the maintenance work and inspections prescribed for the machine carefully, including the
specifications on parts/equipment replacement.
Work on the electrical components may only be performed by a qualified electrician according to the
applicable rules of electrical engineering. Only use original spare parts.
Unauthorized opening and improper interventions in the machine/plant can lead to personal injury or
material damage. Repairs to the AEC may only be carried out by the manufacturer or persons
authorized by the manufacturer. Check protective equipment regularly.
Before performing any maintenance work, the machine/plant must be disconnected from mains
supply and secured against restarting. The five safety rules must be complied with.
2.11.9 Final decommissioning
Unless separate return or disposal agreements were made, recycle the disassembled AEC components:
Scrap metal materials
Recycle plastic elements
Sort and dispose of other component materials
Electric scrap, electronic components, lubricants and other utility materials must be
treated as special waste and may only be disposed of by specialized companies.
In any case, comply with any applicable national disposal regulations as regards
environmentally compatible disposal of the device. For more details, contact the
competent local authorities.

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3Description of function
In many processes, the energy produced by generator operation, cannot be fed-back into the supply mains
by frequency inverters directly. Instead of losing the energy that is converted to unusable heat, the energy
can be fed back into the supply mains by the AEC for re-use.
Depending on the chosen configuration, the energy generated in this way can be recovered in sine or block
form.
One or more frequency inverters can be connected to the DC-link of the AEC.
3.1 Sinusoidal feedback
This type of supply/feedback is characterized by continuous feedback of the available recuperated energy
into and supply of energy by the connected mains. AEC devices used in this way are called “Mains Units”.
Schematic diagram
CAUTION
Device damage
Unsuitable frequency inverters will be damaged or destroyed if used in combination with
a mains unit.
For the “Sinusoidal recovery” function, IT-ACU/ANG devices must be used in any
case.

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Frequency inverter
Line choke
Mains unit
Radio interference filter
Motor
Contactor
Sine filter
Supply mains
Direction of energy flow
L1
L2
L3
A
B
C
D
E
F
G
H
A
BE
B
BF
C
G
D
L1
L2
L3
A
B
C
D
E
F
G
H

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3.2 Block-shaped feedback
In the case of this type of feedback, the available recuperated energy is fed back into the connected mains
as required for a short time. The drive inverters are supplied with energy from the connected mains. The
amount of energy recovered by the AEC device may be significantly lower than the amount of energy tapped
from the mains by the frequency inverter.
AEC devices used in this way are called “Feed-back Units”.
Schematic diagram
Frequency inverter
Contactor
Feed-back unit
Radio interference filter
Motor
Contactor
Sine filter
Supply mains
Direction of energy flow
L1
L2
L3
A
B
C
D
E
F
G
H
A
BE
B
BF
C
G
D
L1
L2
L3
A
B
C
D
E
F
G
H

20
Operating Instructions AEC
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4Storage and transport
NOTICE
Draining the heat sink
Liquid cooled devices may be transported and stored only with the heat sink completely
drained of the coolant.
Use compressed air to drain the heat sink radiator.
4.1 Storage
NOTE
Damage caused by incorrect storage
Wrong or inappropriate storage may result in damage, e.g. due to moisture and dirt.
The frequency inverters must be stored in an appropriate way. During storage, the
devices must remain in their original packaging.
The units may only be stored in dry rooms which are protected against dust and
moisture and are exposed to small temperature deviations only.
The requirements of DIN EN 60721-3-1 for storage, DIN EN 60721-3-2 for transport
and labeling on the packaging must be met.
The duration of storage without connection to the permissible nominal voltage may
not exceed one year. After one year of storage, connect the device to mains
voltage for 60 minutes.