Hitachi SJ300 Series Choosing a, Braking Unit, Max, Unit, Model, @ 100%, Without, Braking, Braking Unit, With Braking Unit, 20 to 200 hp (15 to 1500 kW)

5–8

Dynamic Braking

Motor Control Accessories

Choosing a		The SJ300 Series 200V and 400V class inverter models in the 20 to 200 hp range require
Braking Unit		external braking units to increase their braking torque. Braking units come in sizes correspond-
		ing to the power handing requirements for particular resistor selections. Be sure to follow the
		installation instructions accompanying each braking unit. The following table lists the SJ300
		inverter models and their applicable braking units.
					Performance Versus External Braking Units
	20 to 200 hp (15 to 1500 kW)			Without		With Braking Unit
				Braking
				Unit
								Minimum
		Model Number		Braking		Minimum	Max.	Resistance
	Voltage		Motor		Braking Unit		Braking	@ 100%
				Torque,		Resistance,
	Class		hp		Model		Duty Cycle,	Braking
		SJ300		%		Ohms
							%	Duty Cycle,
								Ohms
		–150LFU	20	10	BRD–E2–N	17	10	46
				10	BRD–E2–30K	4	20	6
		–185LFU	25	10	BRD–E2–N	17	10	46
				10	BRD–E2–30K	4	20	6
		–220LFU	30	10	BRD–E2–N	17	10	46
	200V			10	BRD–E2–30K	4	20	6
		–300LFU	40	10	BRD–E2–30K	2	20	6
				10	BRD–E2–55K	2	20	4
		–370LFU	50	10	BRD–E2–55K	2	20	4
		–450LFU	60	10	BRD–E2–55K	2	20	4
		–550LFU	75	10	BRD–E2–55K	2	20	4
		–150HFU/HFE	20	10	BRD–EZ2–N	34	10	100
				10	BRD–EZ2–30K	10	10	24
		–185HFU/HFE	25	10	BRD–EZ2–N	34	10	100
				10	BRD–EZ2–30K	10	10	24
		–220HFU/HFE	30	10	BRD–EZ2–N	34	10	100
				10	BRD–EZ2–30K	10	10	24
		–300HFU/HFE	40	10	BRD–EZ2–55K	6	20	12
	400V	–370HFU/HFE	50	10	BRD–EZ2–55K	6	20	12
		–450HFU/HFE	60	10	BRD–EZ2–55K	6	20	12
		–550HFU/HFE	75	10	BRD–EZ2–55K	6	20	12
		–750HFU/HFE	100	10	BRD–EZ2–55K	6	20	12
		–900HFU/HFE	125	10	BRD–EZ2–55K	6	20	12
		–1100HFU/HFE	150	10	BRD–EZ2–55K	6	20	12
		–1320HFE	175	10	BRD–EZ2–55K	6	20	12
		–1500HFU	200	10	BRD–EZ2–55K	6	20	12