Brake Resistor Connection - Mitsubishi Electric D700-SC Easy Start Manual

Easy Start Guide
Mitsubishi D700-SC Series Inverter
13. Brake Resistor Connection (if available)
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.
13.1 Parameters to change for Dynamic Braking
Parameter Description
Pr. 30 Regenerative function selection
Pr. 70 Special regenerative brake duty
Do not remove jumper
between terminals
P1 and P/+
N/- P1 P/+ P/+
U
T/L3 V
R/L1 S/L2
Heat Resistant
Cable
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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.
How to set
Default is 0. Set to 1 to enable integrated brake chopper (if fitted).
Default is 0%. Set to 10% or as required by the application.
PR PR
W
PR
A Brake Resistor is first installed to absorb
braking energy and dissipate it as heat. The
resistor 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.
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
P/+
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.
© The Inverter
be correctly sized for both the
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