REVCON RFE B3 User manual

ELTROPLAN-REVCON
Elektrotechnische Anlagen GmbH
Operating instructions
Power feed- feedback unit REVCON
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RFE
Power range 30- ... 250 kW
Voltage range 400V, 460V,
500V
V 1.3 Issue 13/06

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123456278 - 419A58
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Elektrotechnische Anlagen GmbH
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8 A 9A6BCD61C4E1F646AC14B3AC5341 A
88 A AE6A4F1D3E61 A
8 A D3613B1E66A1 A
8 A 6FC1A6FC5347 A
8 A 2 A6D567116DCAC53413B1D34B3A51 A
88 A 2 3 35CF61A6D561 A
8 A 2 EA6D5616D5A3CF465D1D3C551 A
8 A 2 A6D561CD46A1 A
 A CB6514B3AC53418 A
8 A 646AC17CB6514B3AC534188 A
 A CB65 A67347616A734718 A
 A C3513B15617CB6514B3AC53418 A
 A 67EC1CCAE718 A
 A 646AC1475AD534718 A
 A 6D4DC1EC5C1 A
8 A 2CACD56A75D71 A
 A 646AC1EC5C11CDC5341D34E53471 A
 A C56E1EC5C18 A
8 A 936A1B66E11B66ECD145121118 A
 A 936A1B66E 1C4E1B66ECD14512111 A
 A CD51 A
8 A 211 A
 A 647344F12111 A
 A 211 A
 A 7671C4E1A61DA377176D53471 A
8 A 6A671B76712111 A
 A 6A671B767121118 A
 A 456A4C1B7671 A
 A 5D1341DAA645156A111 A
 A 2 71DCCD53A71 A
8 A  B56A1 A
88 A  B56A12111 A
8 A  1B56A12111 A
88 A   13E61 A
 A 475CC5341 A
8 A 6DC4DC1475CC5341 A
 A 64734718 A
 A  3E61 A
 A  B56A1 A
 A 6D5ADC1475CC5341 A

234564571
A A 123456789A78B64CD67E8BAF1AFAAA
123456278 - 419A58

Elektrotechnische Anlagen GmbH
A
1
8 A 6AC53A717CB651 A
 A 9A356D53413B156136A1B66EB66ECD1451 A
 A C47156711C471DCACD56A75D71 A
 A 6DBDC534713B156176E1A671 A
 A 23446D5341 A
8 A 6A4C71C4E1D3446D5341475AD53471 A
 A A4F17D6C5D121118 A
 A A4F17D6C5D12111 A
 A A4F17D6C5D1211151 13E61 A
 A A4F17D6C5D1211151 13E61 A
 A 2345A31A671 A
8 A 2345A31B4D53471 A
 A 2345A31A6712111C4E121118 A
 A 475CC53413B1C136A1B66EB66ECD145141C12 5DC1EA677561 A
 A 475CC5341 A
8 A 23446D53413B1C1 B56A1 A
 A 67F413B1C412 D34B3AC1DC4651 A
 A 475CC53413B1D345A31A671 A
 A 2377344F1 A
8 A A75136A4F11 A
 A 234BFAC53418 A
 A A3673354F1C4E1BC5164C5341 A
8 A  677CF671 A
8 A 6AD61 A
88 A 64E1 A
888 A 53471 A
8 A 2

19A3ED5136A6188 A
8 A 2345CD518 A

11111111111111111111111111111119A6BCD61C4E1F646AC14B3AC5341
123456789A78B64CD67E8BAF1AFA A AA
123456278 - 419A58

Elektrotechnische Anlagen GmbH
A
1Preface and general information
About these Operating Instructions
•These Operating Instructions help you to work properly on and with the power
feed/feedback units REVCON

RFE. They contain safety information which must be
observed and information which are necessary for an undisturbed operation of the
units together with the exploitation of all the advantages of the system.
•All persons who work on and with the power feed/feedback units REVCON

RFE
must have the Operation instructions available and observe all relevant notes and in-
struction.
•The Operating Instructions must always be in a complete and perfectly readable state.
Terminology used
Power feed/feedback unit
For „Power feed/feedback unit REVCON

RFE“ in the following the term
„Power feed/feedback unit“ is used.
Controller
For the frequency inverter which is used together with the power feed/feedback unit in the
following the term „Controller“ is used.
Drive system
For a drive system with power feed/feedback units, controller and other components of the
drive system in the following the term „Drive system“ is used.

1
9A6BCD61C4E1F646AC14B3AC5341
A A 123456789A78B64CD67E8BAF1AFAAA
123456278 - 419A58

Elektrotechnische Anlagen GmbH
A
1.1 Ordering code
* Notes according to the ordering code:
• The precharge limiter of the REVCON

RFE B3/D3 is adapted (at a maximum switch-on
frequency of 1/min) to the normally used DC-bus capacitance values of the controller.
• As the REVCON

RFE B2/D2 has got no switch on current limiter (preload circuit), it
may exclusively used in combination with controllers, which are equipped with an inter-
nal preload circuit for their DC-bus capacitors!
1.2 Scope of delivery
•1 Power feed/feedback unit REVCON

RFE
•1 Operating Instructions
After receipt of delivery, check immediately whether the scope of supply matches with
the accompanying papers. We do not accept any liability for deficiencies claimed sub-
sequently.
Claim
•visible transport damage immediately to the forwarder
•visible deficiencies/incompleteness immediately to ELTROPLAN REVCON
RFE
B3 030
-
400
-
50
-
0
-
A
B
•
Level B: With internal mains inductance
030
•
Nominal power:
E.G. 30 kW
50
•Mains frequency:
E.G. 50Hz
A
•
Version: A
RFE
• Product type:
REVCON-
Front End
3*
•
2 = Without precharge
400
•
Connection voltage:
E.G. 400VAC
0
• Auxiliary voltage:
0=Not required
•
3 = With precharge
400V
Level D: With internal mains inductance
•
and additional capacity

11111111111111111111111111111119A6BCD61C4E1F646AC14B3AC5341
123456789A78B64CD67E8BAF1AFA A AA
123456278 - 419A58

Elektrotechnische Anlagen GmbH
A
1.3 Legal regulations
Labelling Nameplate CE-mark Manufacturer
Power feed/feedback units REVCON

RFE are unequivocally marked by the
contents of the nameplate.
Conforms the EC Low
Voltage Directive
ELTROPLAN-
REVCON
Edisonstraße 3
D-59199 Bönen
Patent rights The power feed/feedback unit REVCON



is protected in Germany and Europe by patents:
Patent-No.: DE 3938654C1 and Patent-Nr.: 90123584.6-2207.
Patent infringements become prosecute.
Application as
directed
Power feed/feedback unit REVCON



RFE
•Must only be operated under the conditions prescribed in these instructions.
•Are components
– to feed/feedback electrical energy.
– used for installation into a machine.
– used for assembly together with other components to from a machine.
•Are electric units for the installation into control cabinets or similar enclosed operating hous-
ing.
•Comply with the requirements of he Low-Voltage Directive
•Are not machines for the purpose of the Machinery Directive
•Are not to be used as domestic appliances, but only for industrial purpose.
Drive systems with power feed/feedback unit REVCON



RFE
•Comply with the EMC-Directive if they are installed according to the guidelines of CE-typical
drive systems.
•Can be used
– on public and non-public mains.
– in industrial as well as residential and commercial premises.
•The user is responsible for the compliance of this application with the EC directives .
Liability
•
The information, data and notes in these Operating Instructions met the state of the art at the
time of printing. Claims referring to power feed/feedback units which have already been sup-
plied cannot be derived from information, illustrations and descriptions given in these Opera-
tion Instructions.
•The specifications, processes and circuitry described in these Operating Instructions are for
guidance only and must be adapted to your own specific application. ELTROPLAN-REVCON
does not take responsibility for the suitability of the process and circuit proposals.
•The indications given in these Operating Instructions describe the features of the product with-
out warranting them.
•ELTROPLAN-REVCON does not accept any liability for damage and operating interference
caused by:
– disregarding these instructions
– unauthorized modifications to the power feed/feedback unit
– operating errors
– improper working on and with the power feed/feedback unit
Warranty
•
Warranty conditions: see sales and delivery conditions of ELTROPLAN-REVCON GmbH.
•Warranty claims must be made immediately after detecting defects or faults.
•The warranty is void in all cases where liability claims cannot be made.
Disposal Material recycle disposal
Metal 1-
Plastic 1-
Printed-board assemblies - 1

1
9A6BCD61C4E1F646AC14B3AC5341
A A 123456789A78B64CD67E8BAF1AFAAA
123456278 - 419A58

Elektrotechnische Anlagen GmbH
A
1.4 EC-Directives / Declaration of conformity
What is the purpose of EC-Directives?
The EC-Directives have been drawn up by the European council to define common techni-
cal standards and certification procedures within the European Community. At the moment
there are 21 EC-Directives for product sectors. The directives are or will be converted in
national laws by the member states. If a certificate is conferred in one member state, it is
valid in all other member states automatically.
The directives only describe the basic standards. The technical details are or will be de-
scribed in harmonized European standards.
What is the meaning of the CE-marking?
After a conformity-assessment-procedure, the conformity with the standards of the EC-
Directives is certified by fixing the CE-marking. Within the EC there are no trading obsta-
cles for a CE-marked product.
Power feed/feedback units with CE-mark themselves are compliant with the Low-Voltage
Directive only. . For observing the EMC Directive recommendations are made.
1.4.1 EC-Low-Voltage Directive
(73/23/EEC)
Modified by: CE – Marking Directive (93/68/EEC)
CE – Marking Directive (2006/95/EC)
General:
•The Low-Voltage Directive is valid for all electrical equipment which is used at a nominal
voltage between 50V and 1000V AC and between 75V and 1500V DC together with cus-
tomary environment conditions. Excluded is e.g. the use of electrical equipment in explo-
sive areas and electrical components of lifts for persons or material.
•Aim of the Low-Voltage Directive is to put only those products into commerce which
don’t endanger the safety of persons and animals as well as the preservation of material as-
sets.

11111111111111111111111111111119A6BCD61C4E1F646AC14B3AC5341
123456789A78B64CD67E8BAF1AFA A AA
123456278 - 419A58
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Elektrotechnische Anlagen GmbH
A
EC-declaration of conformity
According to the EC-Low Voltage Directive (2006/95/EEC)
The power feed/feedback units REVCON

RFE have been developed, designed and manu-
factured in accordance with the above mentioned EC-Directive and in sole responsibility of
ELTROPLAN-REVCON Elektrotechnische Anlagen GmbH,
Edisonstraße 3, D-59199 Bönen
Considered standards:
Standard
DIN VDE 0160 5.88 +A1 / 4.89 +A2 /
10.88
PRDIN EN 50178
Class VDE 0160 / 11.94
Equipment of power installations with electronic
components
EN 61558-1/A1 Safety of power transformers, power supplies, reactors
and similar products
EN 60529 International protection rating
DIN VDE 0100 Guidelines for the design of power installations

1
9A6BCD61C4E1F646AC14B3AC5341
A A 123456789A78B64CD67E8BAF1AFAAA
123456278 - 419A58

Elektrotechnische Anlagen GmbH
A
1.4.2 EC-directive Electromagnetic compatibility
EMC directive (89/336/EWG)
Replaced by: EMC-directive (2004/108/EG)
General:
The objective target describes article 4 (2004/108/EG), as follows:
The... designated devices must be so manufactured, that
(a) an intended operation of radio- and telecommunication devices and other devices is
possible and
(b) the devices have an adequate stability against electromagnetically disturbances, so that
an intended operation is possible.
EG-declaration by the manufacturer
in terms of the EG-standard EMC (2004/108/EG)
The listed REVCON

products are in terms of the EMC no independently recoverable
products, this means only after integration in the overall system would they be rateable re-
garding to EMC. The rating became detected for typical plant constructions, but not for the
several products.
ELTROPLAN-REVCON Elektrotechnische Anlagen GmbH,
Edisonstraße 3, D-59199 Bönen

11111111111111111111111111111119A6BCD61C4E1F646AC14B3AC5341
123456789A78B64CD67E8BAF1AFA A AA
123456278 - 419A58

Elektrotechnische Anlagen GmbH
A
1.4.3 EC-Directive Machinery
Machine directive (98/37/EG)
Changed by: Modification directive (2006/42/EG)
General:
Machinery means an assembly, fitted with or intended to be fitted with a drive system other
than directly applied human or animal effort, consisting of linked parts or components, at
least one of which moves, and which are joined together for a specific application.
EC-declaration of the manufacturer
in terms of the of the EC-Directive Machinery (2006/42/EG)
The power feed/feedback units REVCON

RFE have been developed, designed and manu-
factured in accordance with the above mentioned EC Directive in exclusive responsibility
of
ELTROPLAN-REVCON Elektrotechnische Anlagen GmbH,
Edisonstraße 3, D-59199 Bönen
When installing the machines, commissioning (i.e. the staring of operation as directed) the
power feed/feedback unit is prohibited until it is proven that the machine corresponds to
the regulations of the EC Directive 2006/42/EG (Machinery Directive).

CB6514B3AC5341
A A 123456789A78B64CD67E8BAF1AFAAA
123456278 - 419A58

Elektrotechnische Anlagen GmbH
A
2Safety information
Safety and application notes
for controller
(to : Low-Voltage Directive (2006/95/EEC)
1. General
During operation, power feed/feedback unit may have, according
to their type of protection, live, bare, in some cases also movable
or rotating parts as well as hot surfaces.
Non –authorized removal of required cover, inappropriate use, in-
correct installation or operation, creates the risk of severe injury to
persons or damage to material assets.
Further information can be obtained from the documentation.
All operations concerning transport, installation and commission-
ing as well as maintenance must be carried out by qualified,
skilled personnel (IEC 364 and CENELEC HD 384 or DIN VDE
0100 and IEC-Report 664 or DIN VDE 0110 and national regula-
tions for the preventions of accidents must be observed).
According to this basic safety information qualified skilled per-
sonnel are persons who are familiar with the erection, assembly,
commissioning and operation of the product and who have the
qualifications necessary for their occupation .
2. Application as directed
Power feed/feedback units are components which are designed for
installation in electrical systems or machinery.
When installing in machines, commissioning of the power
feed/feedback unit (i.e. the starting of operation as directed) is
prohibited until it is proven, that the machine corresponds to the
regulations of the EC Directive 2006/42/EG (Machinery Direc-
tive); EN 60204 must be observed.
Commissioning (i.e. starting operation as directed) is only allowed
when there is compliance with the EMC-Directive
(2004/108/EG).
The power feed/feedback units meet the requirements of the Low-
Voltage Directive (2006/95/EEC). The harmonized standards of
the prEN 50178/DIN VDE 0160 series together with EN 60439-
1/DIN VDE 0660 part 500 and EN 60146/DIN VDE 0558 are ap-
plicable for the power feed/feedback unit. The technical data and
information on the connection conditions must be obtained from
the nameplate and the documentation and must be observed in all
cases.
3. Transport, Storage
Notes on transport, storage and appropriate handling must be ob-
served.
At non-observance any warranty expires.
The power feed/feedback unit has to be protected from inadmissi-
ble stress.
The transport is only valid in original packaging and in the
thereon by pictograms marked transport position.
In particular during transport and handling no components are al-
lowed to be bent and / or isolating distances may not be altered.
The units are equipped with electrostatic sensitive devices, which
may be damaged by improper handling. Therefore it has to be
avoided to get in contact with electronic components. If electronic
components are damaged mechanically the unit must not be put
into operation, as it cannot be ensured, that all relevant standards
are observed. Climatic conditions must be observed according to
prEN 50178.
4. Erection
The devices must be erected and cooled according to the regula-
tions of the corresponding documentation.
The power feed/feedback units must be protected from inappro-
priate loads. Particularly during transport and handling, compo-
nents must not be bent and / or isolating distances must not be
changed. Touching of electronic components and contacts must be
avoided.
Power feed/feedback units contain electro-statically sensitive
components which can easily be damaged by inappropriate han-
dling. Electrical components must not be damaged or destroyed
mechanically (health risk are possible!).
5. Electrical Connection
When working on live power feed/feedback units, the valid na-
tional regulations for the prevention of accidents (e.g. VBG 4)
must be observed. Before any installation or connection works,
the pant has to be switched off and to be secured properly.
The electrical installation must be carried out according to the ap-
propriate regulations (e.g. cable cross-sections, fuses, PE-
connection). More detailed information is included in the docu-
mentation. When using the power feed/feedback unit with control-
lers without safe separation from the supply line (to VDE 0100)
all control wiring has to be include in further protective measures
(e.g. double insulated or shielded, grounded and insulated).
Notes concerning the installation in compliance with EMC – such
as screening, grounding, arrangement of filters and laying of ca-
bles – are included in the chapter installation of this documenta-
tion. These notes must be also observed in all cases for power
feed/feedback units with the CE-mark. The compliance with the
required limit values demanded by the EMC legislation is the re-
sponsibility of the manufacturer of the system or machine.
6. Operation
Systems where power feed/feedback units are installed, if appli-
cable, have to be equipped with additional monitoring and protec-
tive devices according to the valid safety regulations e.g. law on
technical tools, regulations for the prevention of accidents, etc.
After disconnecting the power feed/feedback unit from the supply
voltage, live parts of the power feed/feedback unit and power
connections must not be touched immediately, because of possi-
bly charged capacitors. For this, observe the corresponding labels
on the drive controllers.
During operation, all covers and doors must be closed.
7. Maintenance and service
The manufacturer’s documentation must be observed.
This safety information must be kept!
The product-specific safety and application notes in
these Operating Instructions must also be observed!

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2.1 General safety information
•These safety regulations are not entitled to completeness. In case of questions please
contact our technicians.
•When commissioning the power feed/feedback units are compliant with the state of
the art. The power feed/feedback unit generally allows safe operation.
•The statements of this manual describe the attributes of the products without guaran-
teeing them.
•The power feed/feedback unit may expose persons, the power feed/feedback units it-
self and other material to danger, if
– non-qualified personal works at and with the power feed/feedback unit.
– The power feed/feedback unit is used in opposite to its purpose.
•Power feed/feedback units have to be projected in a way, that they fulfil their function
and don’t expose persons to danger, if they are mounted correctly and are used in ac-
cordance with their purpose. This applies also for the interplay with the whole plant.
•The units, operational data and circuit details described in this manual have to be un-
derstood analogously and have to be checked for transferability to each application.
•For the reasons of personal safety, the observance of the EMC-regulations and for the
regular cooling the operation of the device is only allowed with a closed cover of the
housing and with mounted flanges!
•
•Use the drive system only in flawless condition.
•Modifications of the power feed/feedback units without consultation of a REVCON

-
technician are not allowed generally.

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•The warranty given by us expires, if the unit is modified or (even partially) dismantled
or if it is used in contradiction to our instructions.
•The constructor of the plant, who has to know the technical guidelines, bears the re-
sponsibility for the correct selection and arrangement of the electrical components.
•Putting into operation of the power feed/feedback unit is only admissible at VDE-
conform nets of electrical power supply. Non-observance may damage the device!
•In accordance with the corresponding standards and guidelines the operation on even
for a short time over-compensated networks (cosϕ≤1) respectively on un-choked com-
pensation-units is not admissible. If this is done nevertheless, overvoltage will occur
(caused by oscillating currents), which may damage all connected components, espe-
cially electronic units like controllers and power feed/feedback units.
•To low powered or unloaded generators and to regulating transformers it is never al-
lowed to feed back power without a previous consultation of our application depart-
ment. Otherwise unintended voltage rises / excess voltages are generated, which may
damage or destroy REVCON

and combined units!
•Before operating at nets without reference to neutral ground additional safety meas-
ures (e.g. installation of over voltage suppressors like MOV’s) have to be done. If nec-
essary, please ask for technical support by our technicians.
•An undisturbed operation of the power feed/feedback unit is only probable, if the fol-
lowing instructions are observed. If these instructions are not observed, tripping of the
unit and damages may occur.

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•Pay attention to the correct values of mains and DC-bus voltage.
•Separate power and control wires (> 15cm)
•Use shielded or twisted control wires. Connect both ends of the shield to ground!
•When using the digital input devices, only use suitable switching devices, whose
contacts are able to switch the connected voltages.
•Connect the housings of drive, controller and power feed/feedback unit to ground
carefully. Connect shields of power cables to ground at both ends with as big sur-
face as possible (remove lacquer)!
•Connect the cabinet or the plant by a star-shaped network to ground (ground loops
have to be avoided!)
•The power feed/feedback unit has been designed for a fixed connection to mains only.
Especially when using RFI-filter leakage current values> 3,5mA may occur. The cross
section of the earthing conductor must be at least 10mm² copper, or a second conduc-
tor has to be connected in parallel (star shaped grounding network).
•If components are used, which have no electrical separated inputs / outputs it is neces-
sary to equalize the potentials (e.g. by an equalizing wire). If this is not observed these
components may be damaged by equalizing currents.
•When carrying out an insulations test in accordance with VDE0100/part 620 the de-
vice has to be disconnected to avoid damage to the power semiconductors. This proce-
dure corresponds with the standard, as each device performs a high voltage test in ac-
cordance with VDE 0160 (EN 50178) in the course of final testing after manufactur-
ing.

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•A standard fault-current circuit breaker (sensitive on peak currents) is not allowed
to be used as the only protective measure when using controller and power
feed/feedback unit Caused by a DC-component in the mains current a controller
with 3-phase input voltage may prevent a fault-current circuit breaker from tripping
in case of an earth fault. In accordance with VDE 0160 a fault-current circuit
breaker is not allowed to be used as the only protective measure. In dependence on
the kind of network (TN, IT, TT) further protective measures in accordance with
VDE 0100 part 410 are necessary. For a TN-network this may be an over current
protection, for an IT-network a insulation supervision with pulscode-measurment.
For all kind of networks protective insulation (-transformer) may be used, if re-
quired power and length of wires allow that. When selecting a fault current circuit
breaker the following measures have to be considered:
•The fault current circuit breaker has to be compliant with the VDE 0664 stan-
dard.
•The tripping current should be 300mA or more, to prevent a premature tripping
caused by the leakage current of the controller. In dependence on the load, the
length of the motor cables and the usage of a RFI-filter the leakage current may
even be much higher.
Fault current circuit breakers, which are sensitive to all kinds of leakage currents, grant
a good protection and are suitable as the only protection measurement for one ore three
phase controllers. The connection instructions of the manufacturer have to be observed.

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2.2 Safety-responsible persons
User
•User is any natural or legal entity, who uses the drive system or by whom order the
drive system is used.
•The user respectively his security officer have to grant
– that all relevant regulations, instructions and laws have to be observed
– that only qualified personnel works with or at he drive system
– that the relevant manual is available for the personnel during any works
– that non-qualified personnel is prohibited to work on the drive system.
Qualified staff
Danger!
Qualified personnel are persons who are, based on their education, experience, instruction and
knowledge about standards and guidelines, regulations for the prevention of accidents and the
situation in the plant, authorized by the safety officer of the plant to execute the necessary works
and are able to recognize possible dangers and to avoid them.
(Definition of qualified personnel in accordance with IEC 364)
Usage as directed
Danger!
Power feed/feedback units are electrical drive components, which are directed to be installed in
electrical plants or machines. They have to be used only for drive systems with infinity variable
speed controls of 3-phase asynchronous or permanent magnet motors. The usage with other elec-
trical loads is not permitted and may damage the devices. The power feed/feedback unit may
only be connected to symmetrical networks. Non-observance may damage the devices.

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2.3
Layout of the s
•
All safety no
-
The icon
-
The signa
-
The note d
Signal word
Legend
Used pictogra
Warning of
injury to
persons
Imm
curr
War
nent
Dan
situa
War
face
Warningof
property dam-
ages
Harm
situa
Useful informa-
tion and appli-
cation notes
Info
2.4
Residual hazar
Operator’s safety
After mains disconnections, th
Protection of the device
Cyclic connection and disconn
overload
the internal input cur
Allow at least 1 minute betwee
STOP
STOP
A 123456789A
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Anlagen G
e safety information
notes have a uniform layout:
n
characterizes the type of danger.
nal word characterizes the severity of danger.
te describes the danger and suggests how to avo
grams
Signal words
minent danger by
rrent
Danger!
Warns of an immediate
Consequences by disre
Death or severe injurie
arning
of a immi-
nt danger
Warning!
Warns of a possible, ve
situation. Possible con
Death or severe injurie
angerous
tuation
Caution!
Warns of a possible, da
Possible consequences
Minor or small injuries
arning of hot su
r-
ce
Warning!
Warns of touching a ho
Possible consequences
Burnings
armful
tuation
Stop!
Warns of possible prop
Possible consequences
Damage of the drive sy
ings
formation
Note!
Marks a generally, use
If you follow it, you m
handling of the system
ards
the power
terminals + and – remain
live for sev
nnection of the supply voltage at terminals L1,
urrent limitation:
een disconnection and reconnection.
D67E8B
AF1AFAAA
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void the danger.
iately imminent Danger.
sregard:
ries
, very danger
onsequences by
disregard:
ries
, dangerous situation.
es by disregard:
ies
hot surface.
es by disregard:
roperty damages.
es by disregard:
system or its surroun
d-
seful note, tip.
make the
m easier
several minutes.
1, L2 und L3, may

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2.5 General instructions
By this information to erectors and users of a plant hints on properties and directions con-
cerning the power feed/feedback unit are given. These hints are not entitled to complete-
ness.
Special features in comparison towards a chopper:
Unlike a braking resistor a power feed/feedback device isn't a constant sink, but it's de-
pendent on the momentary characteristics of the supplying net. Commutation break downs
and voltage-flicker in the net have a considerable effect to the backward current of the de-
vice. In case of a short time voltage brake down the backward current has to raise corre-
spondingly to feed/feedback the demanded power-amount. Does the level of the supply
voltage sink for a longer time, the maximum feed/feedback power is reduced.
If only one phase fails, the device is able to work on, but the current in the two remaining
conductors will rise up to 150% of the normal level.

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Length of the DC-connection
The maximum inductivity of the DC-connection between output B6 Bridge of the inverter
and the power feed/feedback device mustn't exceed a certain level, as this inductivity in-
ducts an additional voltage to the DC-bus, when the IGBT’s are switched off. To avoid an
overload to the components of the power feed/feedback unit, this additional voltage must
not exceed 100V. Resulting from this and other relevant characteristics of the power
feed/feedback unit (DC-capacity and absolute maximum value of the grid current) the
maximum inductivity can be calculated:
The maximal valid line inductance for the power feedback unit and the coupling induc-
tance between the two conductors produce at a by the current carrying capacity-defined
cross section of the lead of the cable a maximum length of the connecting cable:
This inductivity always has to be higher or equal than the sum of the DC-bus inductivity of
the frequency inverter and the conductor inductivity of the DC connection.
The DC-bus inductivity of the frequency inverter has only to be considered, if it is placed
between the inverter B6 Bridge and the power feed-back unit. The cables, which are nor-
mally used for power applications, have an inductance per unit length of about 0,6µH/m.
If the values of the input capacitance C, the during power feedback maximum allowed rise
of the DC-voltage ∆U
GL
=100V, the top level of the AC-current of the device (=2xI
eff
), the
inductance per unit length L´
(
)
25,0ln´
0
+=
⋅µ
r
a
l
L
π
and the inductance of the DC-bus ´choke
L
ZKD
are known the maximum longitude of the conductors can be calculated with the fol-
lowing equation:
L
L
Li
UC
l
ZKDGL
′
−
′
⋅
∆⋅
=
2
2
max
ˆ
(
)
2
2
max
ˆ
i
UC
L
GL
∆⋅
=
eff
Ii ×= 2
ˆ
2
(
)
25,0ln´
0
+=
⋅µ
r
a
l
L
π

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Typical capacitance of the DC-connection inside the power feed/feedback unit:
REVCON
®
-type Power
[kW]
DC-capacity
[µF]
RFE B2/D2 400V 30 100
RFE B2/D2 400V 45 100
RFE B2/D2 400V 60 220
RFE B2/D2 400V 80 220
RFE B2/D2 400V 100 220
RFE B2/D2 400V 125 440
RFE B2/D2 400V 150 660
RFE B2/D2 400V 200 660
RFE B2/D2 400V 250 660
Table 2.6.1
Example:
C=200µF, ∆U
GL
=100V, i=271A, a=80mm, r=8,5mm, µ
0
=1,257
.
10
-6
H/m
1l
max
=26m
For longer DC-Bus-wires additional capacitors have to be installed (please get in
contact with our application-department if the occasion arises).
(
)
25,0ln´
0
+=
⋅µ
r
a
l
L
π
L
L
L
i
UC
l
ZKD
GL
′
−
′
⋅
∆⋅
=
2
2
max
ˆ