Hitachi SJ300-037HFE Selecting a, Braking Resistor, Dynamic, Selection, 200V Class, 400V Class, Dynamic Braking Resistor Selection

5–9

															SJ300 Inverter
Selecting a				You can add one or more resistors to your inverter configuration to increase braking torque
Braking Resistor				performance. The number of resistors and their configuration (series or parallel) depends on the
				desired braking torque. The tables below list the resistor types for inverter models with internal
				braking units. Tables for inverters with external braking units are on the next two pages.
				• Total Ohms – lists the resistance value of the resistor or, if using multiple resistors, their
				combined resistance
				• Total Watts – lists the power dissipation of the resistor or, if using multiple resistors, their
				combined power dissipation
				• Maximum Duty Cycle – the maximum allowable percentage of braking time over any 100-
				second interval to avoid overheating the resistor(s)
				• Maximum braking torque – the maximum braking torque that the inverter / resistor combina-
				tion can deliver
				NOTE: If your application requires resistors with NEMA ratings, be sure to use the HRB type.
200V Class						Dynamic Braking Resistor Selection
																		Max.
			JRB Series				SRB/NSRB Series							HRB Series
Model																	Braking
						Max.						Max.				Max.
Number																	Torque,
		Type	Total		Total	Duty	Type		Total	Total		Duty	Type	Total	Total	Duty	%
SJ300	& (qty)		Ohms		Watts	Cycle,	& (qty)		Ohms	Watts		Cycle,	& (qty)	Ohms	Watts	Cycle,
						%						%				%
–004LFU	120–3		50		120	1.5	300–1		50	300		7.5	HRB1	50	400	10	200
–007LFU	120–3		50		120	1.5	300–1		50	300		7.5	HRB1	50	400	10	200
–015LFU	120–4		35		120	1.0	400–1		35	400		7.5	HRB2	35	600	10	200
–022LFU	120–4		35		120	1.0	400–1		35	400		7.5	HRB2	35	600	10	160
–037LFU	120–4		35		120	1.0	400–1		35	400		7.5	HRB2	35	600	10	100
–055LFU	120–4		17.5		240	1.0	400–1		17.5	800		7.5	HRB3	17	1200	10	80
–075LFU	x (2) in		17.5		240	1.0	x (2) in		17.5	800		7.5	HRB3	17	1200	10	80			ControlMotor
	parallel						parallel												Accessories
400V Class			17.5		240			Braking		Resistor	Selection			17	1200	10	70
						Dynamic
–110LFU						1.0			17.5	800		7.5	HRB3
																		Max.
			JRB Series				SRB/NSRB Series							HRB Series
Model																	Braking
						Max.						Max.				Max.
Number																	Torque,
		Type	Total		Total	Duty	Type		Total	Total		Duty	Type	Total	Total	Duty	%
SJ300	& (qty)		Ohms		Watts	Cycle,	& (qty)		Ohms	Watts		Cycle,	& (qty)	Ohms	Watts	Cycle,
						%						%				%
–007HFU/HFE	120–2		100		120	1.5	200–2		100	200		7.5	HRB1	100	800	10	200
–015HFU/HFE	120–2		100		120	1.5	200–2		100	200		7.5	x (2) in	100	800	10	200
													series
–022HFU/HFE	120–2		100		120	1.5	200–2		100	200		7.5		100	800	10	200
–040HFU/HFE			70		240	1.0			70	800		10		70	1200	10	140
	120–4						400–1						HRB2
–055HFU/HFE			70		240	1.0			70	800		10		70	1200	10	120
	x (2) in						x (2) in						x (2) in
–075HFU/HFE			70		240	1.0			70	800		10		70	1200	10	100
		series					series						series
–110HFU/HFE			70		240	1.0			70	800		10		70	1200	10	70