USER’S MANUAL
1.
Overview
LG Dynamic Braking Units
SV-DBU-U Series
Nomenclature
Cooling
fan
SV
DBU - 4U
150
SV-DBU-U series is designed to use with LG inverter SV-iS5 and SV-iH series.
This manual describes the safety instructions that must be followed when installing,
LG
operating, and servicing. Read this manual completely before installing. The unit
Drives
Drive
Capacity
Symbol
Symbol
Type
Symbol
Drive Input
Voltage
Dynamic
Braking
Unit
2U
200V Class
DBU
4U
400V Class
contains high voltage that can cause electric shock resulting in personal injury or loss of
life.
Important User Information
Indicates that incorrect handling may cause
! WARNING
150
11~15[kW]
220
18.5~22[kW]
370
30~37[kW]
550
45~55[kW]
750
75[kW]
DB Unit or
DB Resistor
DB Unit or
DB Resistor
DB Unit or
DB Resistor
DB Unit or
DB Resistor
Air flow
GOOD
BAD
<<Fan location in a panel>>

hazardous conditions, resulting in personal injury or
Mounting
The units must be mounted vertically with sufficient room (horizontally and
loss of life.
2.
Specifications
2.1
200V Class
vertically) from adjacent equipment.
Indicates that incorrect handling may cause
! CAUTION
physical damages.
over 100mm
Type
SV150DBU
-2U
Spec.
"CAUTION" level instructions may lead to a serious result according to conditions.
Please follow the instructions of caution level for safety.

Max. DC Input Voltage
1. Electric Shock
2.2
! WARNING
LG Industrial Systems
11
Spec.
Be sure to remove all input power from the braking unit including drive
Applicable Drive
Capacity
Braking Wattage
Resistor
Minimum
Resistance
Service only qualified personnel.
! CAUTION


37
45
6.4 [KW]
9.6 [KW]
4.2 [Ω]
2.8 [Ω]
SV220DBU
-4U
SV370DBU
-4U
SV550DBU
-4U
11
15
18.5
22
30
37
45
55
1)
6.4 [KW]
9.6 [KW]
12.8 [kW]
8.5 [Ω]
5.7 [Ω]
4.2 [Ω]
2.8 [Ω]
8.4 [Ω]
Altitude
may occur.

Do not touch the resistor right after the power is turned off. The resistor is still
hot.
DC (+) input. Connect to “P2” or “P” terminal of drive
Ground Terminal
B1
Connect to braking resistor
Heat Sink Overheat Protection, Over-Current
Protection, Output Short Circuit Protection
B2
Connect to braking resistor
-10℃ ~ 40℃
2)
Control Terminals
Less Than 90 % RH Max. (Non-Condensing)
1,000m above sea level
Cooling
Method
Application
Site
Natural Convection
IN+
No Corrosive Gas, Combustible Gas, Oil Mist, or
Dust
IN- OUT+ OUT-
Terminal
Installation
30B
30C 30A
Function
IN+
Slave turn on signal input (when “Slave Mode” selected)
IN-
Slave turn on signal input (when “Slave Mode” selected)
OUT+
Slave turn on signal output (when “Master Mode” selected)
1) Do not mount the unit in direct sunlight. Isolate the unit from excessive vibration.
OUT-
Slave turn on signal output (when “Master Mode” selected)
2) Protect the unit from moisture, dust, metallic particles, corrosive gases and
30A
Fault signal output
 Environmental Conditions
liquids. Install the units on a non-flammable material and as smooth as possible.
30B
30A : Normal open contact
30B : Normal close contact
3) In case of installing many units in a panel, consider the air flows for power
4. Other Instructions
Description
P
Heat Sink Overheat, Fuse Open, OC Trip
Protection
Operating
Temperature
Humidity
B2
DC (-) input. Connect to “N” terminal of drive
Installing them on a flammable material may cause a fire.
Do not connect the braking resistor directly to the DC terminal (P2, N) of
B1
N
6 seconds
3.
G
G
Output Signal
polarity of DC power terminal. Otherwise, damage and burst of the unit
N
Terminal
100%
Mount the braking unit and resistor on a non-flammable material.
Be sure to connect wires to the correct terminal. Especially, ensure the
Power Terminals
P
the manual. This can cause damage and burst of the unit.

Terminal Configuration
75
4.8 [KW]
Connectable up to 3 units in parallel
Do not apply voltage to the terminals higher than the voltage specified in
SV750DBU
-4U
3.2 [KW]
10% (without cooling fan on heat sink)
! CAUTION
over100mm
DC 800V
Parallel Connection
Environmental
Conditions
over 50mm
55
5.7 [Ω]
Enable Duty
the drive. This can cause a fire.

30
4.8 [KW]
Maximum Turn On Time
3. Injury
22
8.5 [Ω]
2.3
General Specifications
Average Braking Torque
2. Fire
18.5
3.2 [KW]
SV150DBU
-4U

Wait at least 10 minutes before servicing and check the residual voltage.
SV-DBU
4.
Type
Max. DC Input Voltage

15
400V Class
Do not open the front cover when the input power is introduced.

SV550DBU
-2U
over 50mm

before servicing.
SV370DBU
-2U
DC 400V
Applicable Drive
Capacity [kW]
Braking Wattage
Resistor
Minimum
Resistance
Safety Instructions
SV220DBU
-2U
30C
dissipation. (see below figures for proper installation)
30C : Common terminal
(Refer to sec. 7 for details of Master/Slave Operation)
! CAUTION

Do not operate the unit if enclosure damaged.

Prevent any wire fragments, metallic particles from dropping during
installation.
DB Unit or
DB Resistor
DB Unit or
DB Resistor
DB Unit or
DB Resistor
5.

2001. 9
SV030iH-4, SV037iH-4, SV045iH-4, SV055iH-4 units do not provide terminals for DC
reactor connection.
GOOD
Ver. 1.0
The SV-iH series has two kinds of power terminal configurations. Make sure the
wiring according to drive capacity.

LGIS constantly endeavors to improve its products so that information in this manual
is subject to change without notice.
Terminal Wiring
BAD
<<Installing units in a panel>>
1) Wiring Drive, DB unit and DB resistor

3) How to set to Slave (on PCB)
▶ Drive Capacity: 220[kW]
400V Class
 Set the “Select Switch JP1” as below figure.
Applicable
Drive [KW]
DB Unit
SLAVE
MASTER
11
Braking Unit
P
N
G
B1
Common bus bar
4) Connection between Master and Slave
Drive
 Set one DB unit to “Master” and the other to “Slave”.
18.5
22
30
Drive
37
SV150DBU-4U
SV220DBU-4U
SV370DBU-4U
3.2KW 33.9Ω
4.8KW 22.8Ω
6.4KW 16.9Ω
Braking
Resistor
Applicable
Motor [KW]
B2
15
DB Unit SV075DBU-4U
11
15
18.5
22
30
75
90 ~ 160
DB Unit
SV075DBU-4U
DB Unit
SV075DBU-4U
37
 Connect “OUT+” terminal of Master to “IN+” terminal of Slave and “OUT-”
Applicable
Drive [KW]
terminal of Master to “IN-” terminal of Slave.
P1
B1
P2
B2
Braking Unit
2m max.
N
DB Resistor
MASTER PCB
J13
2) Wiring Drive, DB unit, DB resistor and DC reactor
OUT-
OUT-
OUT+
OUT+
IN-
IN-
IN+
IN+
SLAVE PCB
5) Connecting 3 DB Units
N
G
B1
B2
SV750DBU-4U
9.6KW 11.4Ω
Applicable
Motor [KW]
J13
55
SV550DBU-4U
Braking
Resistor
DB Unit
P
45
45
* 2 EA
* 3 EA
12.8KW 8.4Ω
12.8KW 8.4Ω
* 2 EA
* 3 EA
90 ~ 160
220
75
DB
Resistor
DB
Resistor
DB
Resistor
DB
Resistor
16.9Ω ,
6.4kW
16.9Ω ,
6.4kW
16.9Ω ,
6.4kW
16.9Ω ,
6.4kW
DB
Resistor
16.9Ω ,
6.4kW
DB
Resistor
16.9Ω ,
6.4kW

See below for the combination of DB Units and DB resistors.
9.
2)
Combination of 200V Class Units
The DB Unit have four LEDs on the frontcover. The green LEDs display main power input
▶ Drive Capacity: 30[kW] ~ 37[kW]
 Set one DB unit to “Master” and others to “Slave”.
SV750DBU-4U SV750DBU-4U
12.8KW 8.4Ω
55
220
▶ Drive Capacity: 45[kW] ~ 55[kW]
Display LED and Fault Reset
and braking operation. The red LEDs display fault status of the unit.
 Connect “OUT+” terminal of Master to “IN+” terminal of Slave and “OUT-”
DC Reactor
Drive
terminal of Master to “IN-” terminal of Slave, respectively.
P1
B1
P2
MASTER PCB
DB Resistor
OUT-
OUT+
OUT+
IN-
IN-
IN+
IN+
J13
전원
1m max.
S
V
Twist pair
IM
W
B2
5M max.
B2
B1
P
DB
Resistor
DB
4.2Ω , 6.4kW
Resistor
G
TH2
DB Resistor

Use twist wire shorter than 10m between drive, DB unit and DB resistor.

In case of master/slave operation, the control wire should be shorter than 2m with
Input
Power
R
U
S
V
T
W
IM
J13
3)
▶ Drive Capacity: 45[kW] ~ 75[kW]
Units: [mm]
Drive
B1
SV037DBU-4U DB Unit
B2
5M max.
B2
DB Unit SV075DBU-4U
P
B1
N
N
G
G
OUT+
RUN
TH1
OUT-
TH2
16.9Ω ,
6.4kW
DB
Resistor
16.9Ω ,
6.4kW
DB
Resistor
IM
B2
B1
B2
B1
Wire size
5.5 ㎟
8.0 ㎟
14.0 ㎟
14.0 ㎟
5.5 ㎟
5.5 ㎟
5.5 ㎟
8.0 ㎟
14.0 ㎟
B1
B2
P
IN+
N
IN-
B2
B1
TH1
Drive
TH2
G
SLAVE DB Unit
8.
N
P
▶ Drive Capacity: 90[kW] ~ 160[kW]
DB Resistor
DB Unit SV075DBU-4U
DB Unit
SV075DBU-4U
Combination of DB Units according to Drive Capacity
7. Master / Slave Operation
and the other at “Slave”. (When one braking unit is operated it must be set at
MASTER
U
V
W
G
1) In case of parallel operation of two braking units, the one must be set at “Master”
 Set the “Select Switch JP1” as below figure.
FOT
R
S
T (P2)
P N
2M max.
5M max.
2) How to set to Master (on PCB)
OCT
WIRING
EB Resistor
Wire Size:
“Master” : Factory default – “Master”)
OHT
DB
16.9Ω ,
Resistor
6.4kW
Be sure to earth terminal “G” of drive and DB unit.
DB Unit
SV150DBU-2U
SV220DBU-2U
SV370DBU-2U
SV550DBU-2U
SV150DBU-4U
SV220DBU-4U
SV370DBU-4U
SV550DBU-4U
SV750DBU-4U
Dynamic Braking Unit
POWER
P2
MASTER DB Unit
SLAVE
This LED is turned on when the internal protective fuse is opened.
Combination of 400V Class Units
▶ Drive Capacity: 30[kW] ~ 37[kW]
Motor
P1
twist wire.
400V
the IGBT and the unit cut off the output to protect the unit.
Drive
The SV030/037/045/055DBH-4 units provide only terminal “P” instead of terminal
200V
This LED is turned on when an excessive current flows through
(RED)
(RED)
Drive
MCCB
SV030/037/045/055iH-4” for correct wiring.
7.
4.2Ω , 6.4kW
sink of the unit is over heated.
OCT
6) Master/Slave Operation
“P1” and “P2”. Please refer to “2) Wiring Drive, DB unit and DB resistor for

DB
Resistor
SLAVE PCB2
TH1
30A
30B
30C
N
5M max.
This LED is turned on and cut off (trip) the output when the heat
FOT
IN+
DB Unit

OHT
This LED is turned on when the unit is in the braking operation.
10. Dimensions
B1
N
introduced.
RUN
(GREEN)
Twist pair
P2
Function
This LED is turned on when the input power of the unit is
(RED)
IN-
Motor
P1
G
DB Unit SV037DBU-2U
J13
OUT+
U
SV037DBU-2U DB Unit
OUT-
Drive
R
T
* )
SV037DBU-2U DB Unit
SLAVE PCB1
4.2Ω , 6.4kW
1) Single Operation
Display
POWER
(RED)
OUT-
Basic Wiring
MCCB
Drive
1m max.
B2
N
6.
Drive
1)
Combination of Braking Units

DB
Resistor
DB
Resistor
DB
Resistor
DB
Resistor
16.9Ω ,
6.4kW
16.9Ω ,
6.4kW
16.9Ω ,
6.4kW
16.9Ω ,
6.4kW
200V Class
Applicable
Drive [KW]
Braking Unit
Braking
Resistor
Applicable
Motor [KW]
11
15
18.5
22
30
37
45
55
SV150DBU-2U
SV220DBU-2U
SV370DBU-2U
SV550DBU-2U
3.2KW 8.5Ω
4.8KW 5.7Ω
6.4KW 4.2Ω
9.6KW 2.8Ω
11
15
18.5
22
30
37
45
55