Product Profile
The braking unit in the DBU series is applied to consume in the braking resistor the regenerative energy produced in the deceleration process of the motor in the form of heat energy. In this way, the braking performance of the transducer is improved and the braking time of the transducer is reduced.

Features
1. Safety: The tripping function of the equipment against IGBT short circuit and breakdown can effectively avoid the hidden danger of fire caused by the breakdown of IGBT and the overload operation of the resistor in a long time.
2. Wide Compatibility: The special design of this braking unit allows for the usage of common resistance rather than the non-inductive resistance. It can be adjusted to adapt to 600V-760V DC chopper wave voltage. Furthermore, this device is used in various types of medium and low voltage transducer. (Specially designed product reaches up to 1200V)
3. Economy: This facility is characterized by high performance cost ratio. With relatively economical price, its quality is same as that of similar imported products. It is therefore considered as the most economical and practical component product for the braking unit of the transducer.
4. A book-type design is employed in this braking unit which can be installed in a parallel connection with zero clearance. It is recommended that it can be connected in parallel with 3 units at most.

ED = 10%, braking activation voltage = 760 VDC
Applicable to common machine and the elevator (less than 10 stories), crane trolley)

Inverter power (kw)	DBU type	Quantity of DBU	Resistor	Quantity of resistor	Braking torque
0.4	DBU-4015	1	70W 750Ω	1	230
0.75	DBU-4015	1	70W 750Ω	1	130
1.5	DBU-4015	1	260W 400Ω	1	125
2.2	DBU-4015	1	260W 250Ω	1	135
3.7	DBU-4015	1	390W 150Ω	1	135
5.5	DBU-4015	1	520W 100Ω	1	135
7.5	DBU-4015	1	780W 75Ω	1	130
11	DBU-4015	1	1040W 50Ω	1	135
15	DBU-4015	1	1560W 40Ω	1	125
18.5	DBU-4030D	1	4800W 32Ω	1	125
22	DBU-4030D	1	4800W 27.2Ω	1	125
30	DBU-4030D	1	6000W 20Ω	1	125
37	DBU-4045C	1	9600W 16Ω	1	125
45	DBU-4045C	1	9600W 13.6Ω	1	125
55	DBU-4030D	2	6000W 20Ω	2	135
75	DBU-4045C	2	9600W 13.6Ω	2	145
110	DBU-4030D	3	9600W 20Ω	3	100
110	DBU-4110B	1	30kW 6.8Ω	1	100
160	DBU-4220B	1	40kW 3.4Ω	1	140
220	DBU-4220B	1	60kW 3.2Ω	1	110
300	DBU-4300	1	80kW 2.5Ω	1	110
600	DBU-4300	2	90kW 2.5Ω	2	130

ED = 20%, braking activation voltage = 760 VDC
Applies to medium mechanical equipment and elevator(less than 20 stories))

Inverter power	DBU type	Quantity of DBU	Resistor	Quantity of resistor	Braking torque
0.4	DBU-4015	1	140W 750Ω	1	230
0.75	DBU-4015	1	140W 700Ω	1	145
1.5	DBU-4015	1	520W 350Ω	1	150
2.2	DBU-4015	1	520W 230Ω	1	155
3.7	DBU-4015	1	780W 140Ω	1	150
5.5	DBU-4015	1	1040W 90Ω	1	155
7.5	DBU-4015	1	1560W 70Ω	1	145
11	DBU-4015	1	2kW 47Ω	1	150
15	DBU-4030D	1	3kW 34Ω	1	150
18.5	DBU-4030D	1	9600W 28Ω	1	150
22	DBU-4030D	1	9600W 24Ω	1	145
30	DBU-4045C	1	12kW 17Ω	1	150
37	DBU-4045C	1	20kW 16Ω	1	125
45	DBU-4030D	2	10kW 24Ω	2	145
55	DBU-4045C	2	12kW 18Ω	2	155
75	DBU-4045C	2	18kW 13.6Ω	2	150
110	DBU-4045C	3	15kW 16Ω	3	145
160	DBU-4220B	1	80kW 3.2Ω	1	150
220	DBU-4300	1	110kW 2.5Ω	1	150
300	DBU-4220B	2	80kW 3.5Ω	2	150
600	DBU-4300	3	100kW 2.6Ω	3	150

ED = 40%, braking act ivation volt age = 760 VDC
Applies to elevators(over 30 storeys), main hook of the light crane)

Inverter power	DBU type	Quantity of DBU	Resistor	Quantity of resistor	Braking torque
0.4	DBU-4015	1	240W 750Ω	1	230
0.75	DBU-4015	1	450W 550Ω	1	190
1.5	DBU-4015	1	800W 275Ω	1	190
2.2	DBU-4015	1	1.3kW 180Ω	1	135
3.7	DBU-4015	1	2.2kW 110Ω	1	190
5.5	DBU-4015	1	3.3kW 75Ω	1	190
7.5	DBU-4015	1	4.5kW 55Ω	1	190
11	DBU-4030D	1	6.6kW 37Ω	1	190
15	DBU-4030D	1	9kW 27Ω	1	190
18.5	DBU-4045C	1	11kW 22Ω	1	190
22	DBU-4045C	1	13kW 18Ω	1	190
30	DBU-4030D	2	10kW 27Ω	2	190
37	DBU-4045C	2	11kW 22Ω	2	190
45	DBU-4045C	2	13.5kW 18Ω	2	190
55	DBU-4045C	3	12kW 22Ω	3	190
75	DBU-4045C	4	11kW 22Ω	4	190
110	DBU-4220B	1	66kW 3.7Ω	1	190
160	DBU-4220B	2	48kW 5Ω	2	190
220	DBU-4220B	2	66kW 3.7Ω	2	190
300	DBU-4300	2	90kW 2.7Ω	2	190
600	DBU-4300	4	90kW 2.7Ω	4	190

Note: Because cranes used and sis in a state of high frequency use, its configuration is matched according to ED=60%~80%, for specipic configurations, contact our company please.