Product Introduction

The function of the braking unit is to divert into a braking resistor the regenerative energy produced in the process of decelerating the motor, converting that energy into heat. Regenerative energy flows from the motor into the inverter DC Bus, manifested as increased bus voltage. The advantage gained using the braking unit is improved braking performance and shorter deceleration time of the load.

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 frequency inverter is improved and the braking time of the frequency inverter is reduced.

Features

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.
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 . Further more, this device is used in various type of medium and low voltage frequency inverter (Specially designed product reaches up to 1200V)
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 inverter .
Adaptable to connection in parallel: It adopts a book-shape design can be installed in a parallel connection with zero clearance .It is recommended that up to 3 units can be connected in parallel .

Outline& Mounting Dimension(Unit:mm)

Type	Mounting Hole Size (mm)	Terminal Screw Size	Wire Size (mm2)
2015/2030/4015/4030/4045	6	M4	4-6
4220	8	M8	16-36

Model	Dimensional Drawing	Rated braking current	Max.Braking Current	Chopper Voltage	Mounting Hole Size	Terminal	Weight（kg）	Cable(mm)
DBU-2015	A	15A	50A	DC380V±5V	6	M4	2.3	4-6
DBU-2022		25A	75A	DC380V±5V	6	M4	2.3	4-6
DBU-2030		30A	90A	DC380V±5V	6	M4	2.3	6-8
DBU-4030		15A	50A	DC630/DC660/DC690V/DC730V±10V	6	M4	2.3	4-6
DBU-4045		25A	75A	DC630/DC660/DC690V/DC730V±10V	6	M4	2.3	4-6
DBU-4110	B	60A	200A	DC630/DC660/DC690V/DC730V±10V	8	M8	13.2	16-36
DBU-4220		85A	300A	DC630/DC660/DC690V/DC730V±10V	8	M8	13.2	16-36
DBU-4300		120A	500A	DC630/DC660/DC690V/DC730V±10V	8	M8	13.2	25-50
DBU-6220		85A	300A	DC630/DC660/DC690V/DC730V±10V	8	M8	13.2	16-36

Recommended brake assembly matching specification

Inverter		Braking Unit		Braking resistor
Voltage(V)	Motor(KW)	Model	Qty(PCS)	Recommend resistor value	Resistor specification	Qty(PCS)
220V	0.75KW	Built-in		80W200Ω	80W200Ω	1
	1.5KW	Built-in		200W100Ω	200W100Ω	1
	2.2KW	Built-in		300W70Ω	300W70Ω	1
	3.7KW	Built-in		400W40Ω	400W40Ω	1
380V	0.75KW	Built-in		80W750Ω	80W750Ω	1
	1.5KW	Built-in		200W400Ω	200W400Ω	1
	2.2KW	Built-in		300W250Ω	300W250Ω	1
	3.7KW	Built-in		400W150Ω	400W150Ω	1
	5.5KW	Built-in		600W100Ω	600W100Ω	1
	7.5KW	Built-in		800W75Ω	800W75Ω	1
	11KW	Built-in		1000W50Ω	1000W50Ω	1
	15KW	Built-in		1500W40Ω	1500W40Ω	1
	18.5KW	Built-in	1	2500W35Ω	2500W35Ω	1
	22KW	Built-in	1	3000W27.2Ω	1500W54Ω	1
	30KW	4030	1	5000W19.2Ω	2500W40Ω	2
	37KW	4045	1	6000W16Ω	2000W50Ω	3
	45KW	4045	2	9600W13.6Ω	2500W54Ω	4
	55KW	4030	2	12000W10Ω	2000W60Ω	6
	75KW	4045	2	16000W7.5Ω	2500W60Ω	8
				Braking Resistor Box		Quantity(PCS)
	90KW	4030	3	9600W20Ω		3
	100KW	4220	1	9600W20Ω		3
	132-160KW	4220	1	40KW3.4Ω		1
	185-220KW	4220	1	60KW3.2Ω		1
	250-315KW	4220	2	40KW4.5Ω		2
	315-600KW	4220	3	60KW3Ω		3

Model		AC200V-AC300V			AC380V~AC460V
		2015	2022	2030	4030	4045	4220	4300
Input And Output	Peak current (A)	50	75	90	50	75	300	400
	Rated Current(A)	15	25	30	15	25	85	120
	Breaking initial voltage	380±5V			630/660/690/730/760V±10V
	Maximum Hysteresis Error	About 8V			About 16V
	Multiple units	Maximum: breaking unit are parallel connected
Power	DC Bus Voltage Range	DC 243~400V			DC460~800V
Indication Function	Power ON	The red "power" LED will be on when the inverter DC Bus voltage is above ~35VDC
	Braking ON	The green "braking" LED will be on during braking unit work
Ambient	Temperature	-10C~+40C ( -10C~+50C for store)
	Humidity	90% RH (no dew)
	Vibration	1G(10~20HZ), 0.2G ( 20~50HZ)
	Protection	IP20
Structure		Wall mounted