INVT RBU100H User manual

RBU100H
Regenerative Energy Unit

RBU100H operation manual Contents
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Contents
Contents......................................................................................................................................... i
1 Safety precautions..................................................................................................................... 1
1.1 Safety definition................................................................................................................1
1.2 Warning symbols..............................................................................................................1
1.3 Safety guidelines..............................................................................................................1
2 Inspection................................................................................................................................... 4
2.1 Unpacking inspection .......................................................................................................4
2.2 Application confirmation....................................................................................................4
2.3 Installation confirmation....................................................................................................4
3 Product overview....................................................................................................................... 6
3.1 Comprehensive features ..................................................................................................6
3.2 Product name and model .................................................................................................6
3.3 Rated specifications.........................................................................................................7
4 Installation guidelines................................................................................................................ 8
4.1 Installation environment....................................................................................................8
4.2 Installation direction..........................................................................................................9
4.3 Installation steps...............................................................................................................9
4.4 Terminals and function....................................................................................................11
4.5 Standard wiring ..............................................................................................................12
4.6 Parallel connection.........................................................................................................13
5 Keypad operation......................................................................................................................16
5.1 Keypad...........................................................................................................................16
6 Function parameters.................................................................................................................18
6.1 Function code ................................................................................................................18
6.2 Detailed function ............................................................................................................21
7 Fault tracking............................................................................................................................22
8 Maintenance and hardware diagnostics..................................................................................24
8.1 Maintenance interval......................................................................................................24
8.2 Cooling fan.....................................................................................................................26
8.3 Capacitors......................................................................................................................26
8.4 Power cables .................................................................................................................28
9 Dimension and size ..................................................................................................................29
9.1 Dimension of the keypad................................................................................................29
9.2 External dimension and weight of RBU...........................................................................30

RBU100H operation manual 1 Safety precautions
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1 Safety precautions
1.1 Safety definition
Danger:
Serious physical injury or even death may occur if not follow
relevant requirements
Warning:
Physical injury or damage to the devices may occur if not follow
relevant requirements
Note:
Physical hurt may occur if not follow relevant requirements
Qualified
electricians:
People working on the device should take part in professional
electrical and safety training, receive the certification and be
familiar with all steps and requirements of installing,
commissioning, operating and maintaining the device to avoid any
emergency.
1.2 Warning symbols
Warnings caution you about conditions which can result in serious injury or death, damage to the
equipment and advice on how to avoid the danger. Following warning symbols are used in this
manual:
Symbol
Name
Description
Abbreviation
Danger
Danger
Serious physical injury or even death
may occur if not follow the relative
requirements
Warning
Warning
Physical injury or damage to the
devices may occur if not follow the
relative requirements
Note
Note
Physical hurt may occur if not follow
the relative requirements
Note
1.3 Safety guidelines
Only qualified electricians are allowed to operate.
Do not carry out any wiring and inspection or changing components
when the power supply is applied.
Do not refit unless authorized; otherwise fire, electric shock or other
injury may occur.

RBU100H operation manual 1 Safety precautions
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1.3.1 Delivery and installation
Please install the RBU on fire-retardant material.
Do not operate on the RBU if there is any damage or components loss.
Do not touch the RBU, internal components and PCB board after wiring;
otherwise electric shock may occur due to the present high DC voltage.
Note:
Select appropriate moving and installing tools to ensure a safe and normal running of the RBU
and avoid physical injury or death. For physical safety, the erector should take some
mechanical protective measurements, such as wearing exposure shoes and working uniforms.
Ensure to avoid physical shock or vibration during delivery and installation.
Do not carry the RBU by its cover. The cover may fall off.
Install away from children and other public places.
The RBU cannot meet the requirements of low voltage protection in IEC61800-5-1 if the sea
level of installation site is above 2000m.
Please use the RBU in proper environment.
Avoid any conductive objects on the front cover, otherwise electrical shock may occur.
Tighten up the screws when wiring, otherwise fire, leakage current may occur.
1.3.2 Commissioning and running
Disconnect all power supplies applied to the RBU before the terminal
wiring and wait for at least the designated time after disconnecting the
power supply.
Only qualified electricians are allowed to operate on the RBU.
Inspect the wiring before running.
Do not touch the terminals of control board when power on.
Before running, ensure the master/slave selection and voltage class
setting are correct.
Adjust and inspect the RBU only after the power indicator is totally off
and the RBU DC bus voltage is measured to be lower than 36V by a
multi-meter.
Do not touch any internal components during the running.
The RBU is an accessory device of the variable-frequency drive (VFD).
Before the use, install a special fuse for semiconductor. Otherwise, in
addition to the RBU failure, the VFD failure or damage may result. No
matter whether the VFD fault is related to the RBU, we are not
responsible for any VFD fault. Please install semiconductor fuses.

RBU100H operation manual 1 Safety precautions
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The RBU is not equipped with a buffer circuit. It is recommended to use
the RBU with the BUB series buffer product or configure a buffer unit by
yourself to avoid RBU damage due to unbuffered power-on shock.
Note:
Do not switch on or off the input power supply of the RBU frequently.
Ensure correct setting of the RBU.
Do not do any voltage test on the RBU; otherwise damage to the semiconductor components
may occur.
Fans or other cooling device are needed in multiple installations.
Temperature and other protection are needed for RBU. Our company is not responsible for any
heating damage to the regenerative resistor caused by the RBU fault.
1.3.3 Maintenance and replacement of components
Only qualified electricians are allowed to perform the maintenance,
inspection, and components replacement of the RBU.
Disconnect all power supplies to the RBU before the terminal wiring.
Take measures to avoid screws, cables and other conductive matters to
fall into the RBU during maintenance and component replacement.
Note:
Please select proper torque to tighten screws.
Keep the RBU, parts and components away from combustible materials during maintenance
and component replacement.
Do not carry out any isolation and pressure test on the RBU and do not measure the control
circuit of the RBU by megohmmeter.
1.3.4 Scrap treatment
There are heavy metals in the RBU. Deal with it as industrial effluent.
When the life cycle ends, the product should enter the recycling system.
Dispose of it separately at an appropriate collection point instead of
placing it in the normal waste stream.

RBU100H operation manual 2 Inspection
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2 Inspection
2.1 Unpacking inspection
Check as followings after receiving products:
1. Check that there are no damage and humidification to the package. If not, please contact
with local agents or INVT offices.
2. Check the information on the type designation label on the outside of the package to
verify that the drive is of the correct type. If not, please contact with local dealers or INVT
offices.
3. Check that there are no signs of water in the package and no signs of damage or breach
to the RBU. If not, please contact with local dealers or INVT offices.
4. Check the information on the type designation label on the outside of the package to
verify that the name plate is of the correct type. If not, please contact with local dealers or
INVT offices.
2.2 Application confirmation
Check as followings before the actual installation and usage:
1. Check that the ambient temperature of the RBU is below 40°C . If exceeds, derate 3% for
every additional 1°C . Additionally, the RBU cannot be used if the ambient temperature is
above 50°C .
2. Check that the ambient temperature of the RBU in actual usage is above -10°C. If not,
add heating facilities.
3. Check that the altitude of the actual usage site is below 1000m. If exceeds, derate 1% for
every additional 100m.
4. Check that the humidity of the actual usage site is below 90% and condensation is not
allowed. If not, add additional protection devices.
5. Check that the actual usage site is away from direct sunlight and foreign objects cannot
enter the RBU. If not, add additional protective measures.
6. Check that there is no conductive dust or flammable gas in the actual usage site. If not,
add additional protection to the RBU.
2.3 Installation confirmation
Check as followings after the installation:
1. Check that the load range of the input and output cables meet the need of actual load.
2. Check correct setting of the RBU.
3. Check that the RBU is installed on non-flammable materials and the calorific accessories

RBU100H operation manual 2 Inspection
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(reactors and brake resistors) are away from flammable materials.
4. Check that all control cables and power cables are run separately and the routation
complies with EMC requirement.
5. Check that all grounding systems are properly grounded according to the requirements
of the RBU.
6. Check that the free space during installation is sufficient according to the instructions in
user’s manual.
7. Check that the external connection terminals are tightly fastened and the torque is
appropriate.
8. Check that there are no screws, cables and other conductive items left in the RBU. If not,
get them out.

RBU100H operation manual 3 Product overview
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3 Product overview
3.1 Comprehensive features
Technological feature
Instruction
Voltage range
AC 3PH 380V(-15%)–440V(+10%)
AC 3PH 520V(-15%)–690V(+10%)
Brake torque
Continuously run with 100% of rated torque
AC power
380VAC/660VAC, 50/60Hz
AC voltage range
+10%–15%, the imbalance between phases less than 2%
AC frequency range
Less than 3Hz
Control mode
Current control with 120°
AC power factor
Higher than 0.9
Overload capacity
60s with 150% of rated current
Operation mode
External terminal; Keyboard
Fault output
Relay output
Status display
LED keypad
Analog output
Voltage (0–10V)
Overcurrent protection
330% of the rated current
Overload protection
60s with 150% of rated current
Overvoltage
DC: 830V/1250V
Over-temperature
Temperature resistance detection
AC phase failure fault
AC phase loss
AC frequency failure
fault
Fluctuating higher than 3Hz
3.2 Product name and model
Designation keys:
Designation key
Instruction
A
RBU: regenerative braking unit
B
1 means the technological version
C
00 are the spare codes
D
H: heavy-load

RBU100H operation manual 3 Product overview
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Designation key
Instruction
E
Power code; 055 means 55kW
F
4: AC 3PH 380V(-15%)–440V(+10%)
6: AC 3PH 520V(-15%)–690V(+10%)
3.3 Rated specifications
The rated power of RBU100H is the motor power at 100% braking torque.
3.3.1 380V
Model
Rated
power
(kW)
Rated
current at
DC side (A)
Rated
current at
AC side (A)
Input
reactor
Regenerative
output
reactor
RBU100H-022-4
22
37
30
ACL2-022-4
ERL-022-4-C
RBU100H-030-4
30
51
40
ACL2-030-4
ERL-037-4
RBU100H-045-4
45
77
60
ACL2-045-4
ERL-055-4
RBU100H-055-4
55
96
75
ACL2-055-4
ERL-055-4
RBU100H-090-4
90
150
120
ACL2-075-4
ERL-090-4
RBU100H-110-4
110
183
145
ACL2-110-4
ERL-090-4
RBU100H-132-4
132
220
176
ACL2-160-4
ERL-132-4
RBU100H-160-4
160
267
213
ACL2-160-4
ERL-160-4-C
RBU100H-200-4
200
333
266
ACL2-200-4
ERL-220-4
RBU100H-250-4
250
417
330
ACL2-280-4
ERL-250-4
3.3.2 660V
Model
Rated
power
(kW)
Rated
current at
DC side(A)
Rated
current at
AC side(A)
Input
reactor
Regenerative
output
reactor
RBU100H-055-6 55 52 42 ACL-055-6 ERL-055-6
RBU100H-090-6 90 86 68 ACL-110-6-A ERL-090-6-A
RBU100H-160-6 160 152 122 ACL-160-6 ERL-160-6
RBU100H-200-6 200 190 152 ACL-200-6 ERL-200-6
RBU100H-315-6 315 300 230 ACL-315-6 ERL-315-6
RBU100H-400-6 400 400 330 ACL-400-6 ERL-400-6
Note:
RBU 380V 22kW–45 kW has internal output reactor. RBU 380V 55kW–250kW/660V
55kW–400kW has standard output reactor.
Each RBU100H has 1 standard input reactor. Select the input reactor according to the rated
parameters of the VFD.
The input filter is optional. Select the input filter according to the rated parameters of the VFD.
The fuse is optional. Configure the fuse at 1.5 times of the rated current of the RBU.

RBU100H operation manual 4 Installation guidelines
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4 Installation guidelines
Only qualified electricians are allowed to carry out what described in this
chapter. Please operate as the instructions in chapter 1 Safety precautions.
Ignoring these may cause physical injury or death or damage to the devices.
Ensure the power supply of the RBU is disconnected during the operation.
Wait for at least the time designated until the POWER indicator is off after the
disconnection if the power supply is applied. It is recommended to use the
multimeter to monitor that the DC bus voltage of the drive is under 36V.
The installation and design of the RBU should be complied with the
requirement of the local laws and regulations in the installation site. If the
installation infringes the requirement, our company will exempt from any
responsibility. Additionally, if users do not comply with the suggestion, some
damage beyond the assured maintenance range may occur.
Don not hold the front cover only during moving, otherwise the machine may
fall.
4.1 Installation environment
The installation environment is the safeguard for a full performance and long-term working of the RBU.
Check the installation environment as followings:
Environment
Conditions
Installation site
Indoor
Environment
temperature
-10–+40°C
It is not recommended to use the RBU if the ambient temperature is
above 40°C .
In order to improve the reliability of the device, do not use the RBU
if the ambient temperature changes frequently.
Please provide cooling fan or air conditioner to control the internal
ambient temperature below the required one if the RBU is used in a
closed space such as in the control cabinet.
When the temperature is too low, if the RBU needs to restart to run
after a long stop, it is necessary to provide an external heating
device to increase the internal temperature, otherwise damage to
the devices may occur.
Humidity
RH≤90%
No condensation is allowed.
The maximum relative humility should be equal to or less than 60%
in corrosive air.