Hitachi SJ700B SERIES - Page 33

Chapter 2 Installation and Wiring
2 - 21
2.2.5 Selection and wiring of dynamic braking resistor (on 5.5 kW to 30 kW models)
The SJ700B series inverter models with capacities of 5.5 to 30 kW have an internal dynamic braking
circuit.
Connecting an optional dynamic braking resistor to RB and P terminals increases the braking torque.
Without a resistor
connected
Minimum connectable resistor
Model
Motor
capacity
(kW)
Braking torque
(%)
Resistance
(Ω)
Braking torque
(％)
BRD usage
rate
(％)
Minimum
resistance
during
continuous
operation
(Ω)
SJ700B-110LFF/LFUF 11 10 10 110 10 50
SJ700B-150LFF/LFUF 15 10 10 80 10 50
SJ700B-185LFF/LFUF 18.5 10 7.5 90 10 35
SJ700B-220LFF/LFUF 22 10 7.5 70 10 35
SJ700B-300LFF/LFUF 30 10 5 80 10 35
SJ700B-055HF 5.5 20 70 120 10 200
SJ700B-075HFF/HFUF 7.5 20 70 90 10 150
SJ700B-110HFF/HFUF 11 10 35 120 over 10 150
SJ700B-150HFF/HFUF 15 10 35 90 10 100
SJ700B-185HFF/HFUF 18.5 10 24 110 10 100
SJ700B-220HFF/HFUF 22 10 24 90 10 100
SJ700B-300HFF/HFUF 30 10 20 80 10 100