Hitachi SJ Series, User Manual

Page: 76 / 786

7-21
Chapter 7
Wire Connection and Optional Devices
7.5.11 Regenerative Braking Option
・
We want to set a short deceleration time, but
overvoltage error occurs.
・
When hanging the device for elevation or lowering,
overvoltage error occurs.
7.5.12 Connection Terminals for External
Braking Resistor (P,RB)
・
In SJ series P1, braking resistor circuit is included
in the following models as standard.
P1-00044-L (004L) - P1-01240-L (220L)
P1-00041-H (007H) - P1-00930-H (370H)
・
By attaching the optional braking resistor, you can
use the device even at large regenerative load
(lowering load or load applied at high-speed
rotation).
・
Do not attach a resistor whose resistance
is lower than the predefined value.
Otherwise, the regenerative braking
(BRD) circuit may be damaged.
・
Do not connect items other than the
braking resistor to the RB terminal and P
terminal.
・
Do not short the RB terminal and P
terminal.
・
Please arrange the terminals so that heat
generated from braking resistor does not
affect the inverter.
・
With the braking resistor and regenerative braking
unit, you can improve braking power and suppress
overvoltage.
・
To enhance braking power using an option, attach
a braking resistor or braking unit.
Q
A
Braking resistor
(option)
Short
bar
P N RB N
Braking unit
(option)
Short
bar
P PD N RB
P PD
RB
N
Short bar
Failure
Prohibited
Caution