N/-
P1
P/+
PR
T/L3
R/L1
S/L2
U
V
W
Easy Start Guide
13. Brake Resistor Connection (if available)
Page 13
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©
Drive Supermarket and must not be reproduced or altered without prior written permission.
Before commencing, confirm that the Inverter and
all cables are completely isolated from the power
supply, have been isolated for at least 5 minutes
and that the motor is not turning.
Parameter
Description
How to set
Pr. 30
Regenerative function selection
Default is 0. Set to 1 to enable integrated brake chopper (if fitted).
Pr. 70
Special regenerative brake duty
Default is 0%. Set to 10% or as required by the application.
13.1 Parameters to change for Dynamic Braking
13.2 Connecting the Resistor
A wiring diagram is shown in the illustration
opposite. Connect the brake resistor to the PR
and P/+ terminals on the Inverter. The order of
the connections is unimportant.
The braking resistor may get hot during
operation. Ensure that it is suitably-mounted
so any heat generated will not affect other
equipment. Some resistors may include a
thermal relay for additional protection.
It is essential that a resistor of the correct rating
is used. Consult the product manual issued by
the manufacturer or product listing on
InverterDrive.com for further information.
Note: Some smaller D720S Inverters do not
have integrated dynamic braking. The
illustration opposite is based on the 230V
Single Phase frame size at 0.75kW. Other
ratings and frame sizes are similar.
PR
P/+
High inertia loads can cause overvoltage trips
during deceleration and lead to “E.OV3" error
messages. In many cases, the solution is to
increase the deceleration time to compensate.
However, if the application requires it, dynamic
braking can be enabled to maintain or reduce
deceleration times by absorbing the energy
generated by such loads.
A Brake Resistor is first installed to absorb
braking energy and dissipate it as heat. The
resistor
be correctly sized for both the
must
Inverter and application.
Then, the “brake chopper” within the Inverter is
enabled. This detects excessive braking
energy and redirects it to the resistor when
required.
Heat Resistant
Cable
Mitsubishi D700-SC Series Inverter
P/+
PR
Do not remove jumper
between terminals
P1 and P/+