Fuji Electric FRENIC-Eco Series User manual

Instruction Manual
DB Unit
Dynamic Braking Unit
200V Series
37kW /BU37-2C
to 0kW /BU 0-2C
400V Series
37kW /BU37-4C
to 220kW /BU220-4C


CAUTION
■ Ensure that this instruction manual is made
available to the final user of the DB unit.
■ Read and understand all operating instructions
before installing, connecting (wiring), operating,
maintaining or inspecting the DB unit.
■ Keep this manual up to disposing the DB unit
carefully.
■ The product is subject to change without notice.
INR-HF51196c-E

Preface
Thank you for purchasing our dynamic braking unit (DB unit). This product is a device to discharge the braking
power to a resistor in a braking operation of the Fuji's inverter for general industry. The applicable inverter
models should be referred to Table A.
Read this manual carefully before using, understand the treatment method and use the DB unit correctly.
Incorrect use may result in obstruction of normal operation, shortening of the life or cause of failure. Keep this
manual carefully even after using.
As this manual does not cover the use of inverter, refer to relevant manuals for the inverter to be used.
Table A Applicable inverter models
Series Model
General-purpose inverter FRENIC5000 G5/P5,G7/P7,G S/P S,G11S/P11S series
FRENIC-Eco series
200V
Vector inverter FRENIC5000 VG3,VG5,VG7S series
General-purpose inverter FRENIC5000 G S/P S,G11S/P11S series
FRENIC-Eco series
400V
Vector inverter FRENIC5000 VG5,VG7S series
As following the old model is applicable to DB unit by special tuning before shipment, please
contact your local distributor or nearest Fuji Electric's sales office.
Series
Model
200V Vector inverter FRENIC5000 VG series
General-purpose inverter FRENIC5000 G5/P5, G7/P7 series 400V
Vector inverter FRENIC5000 VG,VG3 series
Safety instructions
Read this manual carefully before installing, connecting (wiring), operating, maintaining, or inspecting the DB
unit and use it correctly.
Familiarize yourself with all knowledge of the device, safety information and instructions before using.
In this manual, safety messages are classified as follows.


ARNING
Denotes operating procedures and practices that may result in personal injury or
loss of life if not correctly followed.


CAUTION
Denotes op
erating procedures and practices that may result in slight to medium
personal injury or property damage if not correctly followed.
Situation more serious than those covered by CAUTION will depend on prevailing circumstances.
Always follow the instructions as important contents are described in these.
Instruction on use


ARNING
・ This DB unit is designed to discharge the braking power to a resistor in a braking operation of the Fuji's
inverter for general industry. It cannot be used for others.
Fire may result.
・ This DB unit may not be used (as is) as a component of a life-support system or other medical device
directly affecting the personal welfare of the user.
・ This product is manufactured under strict quality control standards. However, safety equipment must be
installed if the failure of this device may result in heavy accident and/or property damage.
There is a risk of accident.

Instruction on installation


ARNING
・ Mount this DB unit on an material such as metal.
Fire may result.
・ Do not place combustible or flammable material near this DB unit。
Fire may result.
・ Contain the DB unit into a panel etc. so as not to be able to touch it easily.
Electric shock or accident may result.
・ Ensure that the specified bolts are used when installing the DB unit.
There is a risk of accident or injury.


CAUTION
・ Do not hold the front cover when carrying the DB unit.
Injury by dropping may result.
・ Ensure that the DB unit and cooling fins are kept free if foreign matters such as lint, paper, small chips of
wood or metal, or dust.
Fire or accident may result.
・ Do not install or operate a damaged DB unit or a DB unit missing parts.
Injury may result.
Instruction on wiring


ARNING
・ Use wires of the specified size for wiring.
Fire may result.
・ Do not connect the DC terminals (P(+) and N(-)) to the connection terminals on the inverter side in
mistake for the polarity （+ and –）.
Fire may result.
・ Ensure that the grounding wire is connected.
Electric shock or fire may result.
・ A licensed specialist must perform the wiring works.
Electric shock may result.
・ Turn off the power before starting the wiring work.
Electric shock may result.
・ Wire after the installation of the DB unit is complete.
Electric shock or fire may result.


CAUTION
・ Check that the rated voltage of the product complies with that of the inverter.
Injury may result.
・ Do not directly connect DC terminals (P(+) and N(-)) to the braking resistor.
Fire may result.
・ The DB unit and wiring generate noise. Take care the malfunction of the sensors and devices in
surroundings.
Accident may occur.

Instruction on operation


ARNING
・ Ensure that the power is turned on (close) after attaching the front cover. In energized status, do not
remove the cover.
Electric shock may result.
・ Do not touch the terminals of the DB unit in energized state of the inverter even if the inverter has stopped.
Electric shock may result.


CAUTION
・ Do not start and stop the inverter by turning on/off the main circuit power supply.
Failure may result.
・ Do not touch the cooling fins and braking resistor since they become very hot.
Burns may result.
・ The braking with this DB unit cannot function as mechanical holding.
Injury may result.
Instruction on maintenance, inspection, and parts replacement


ARNING
・ Wait a minimum ten minutes after the power has been turned off (open) before starting inspection.
Further, check that the charge lamp is turned off and that the DC voltage between the terminals P(+) and
N(-) do not exceed 25V.
Electric shock may result.
・ Only authorized personnel should perform maintenance, inspection, and replacement operations.
Take off metal jewelry such as watches and rings.
Use insulated tools.
Electric shock or injury may result.

Instruction on disposal


CAUTION
・ Treat the DB unit as industrial waste when disposing it.
Injury may result.
Other instructions


ARNING
・ Never modify the product.
Electric shock or injury may result.
Conformity to Low Voltage Directive in Europe


CAUTION
・ Ensure that the DB unit is grounded.
・ When wiring to the main circuit terminals and terminal for grounding of the inverter, use round terminals for the
cable.
・ Use a single cable to connect the grounding terminal G of the DB unit. (Do not use two or more wires
for the wiring.)
・ Use the DB unit under overvoltage category III conditions and maintain Pollution degree 2 or better as
specified in IEC 664. To maintain Pollution degree 2 or better, install the DB unit in a control panel (IP54 or
higher level) having a structure free from water, oil, carbon, dust, etc.
・ For the input-output wiring of the DB unit, use cable (wire diameter and type) as specified in Appendix C in
EN 60204.
・ To prevent electric shock at terminals or live parts, install the braking resistor as follows:
1) Install inside an IP4X cabinet or a barrier if electrical parts are exposed.
2) Install inside an IP2X cabinet or a barrier if electrical parts are not exposed.
GENERAL ATTENTION
Some illustrations in this manual are drawn in the status with removed cover or block for safety to describe in
detail. When operating the product, ensure that the cover or block is returned to the original as the
specification, and operate in accordance with the manual.