Selection Of Regenerative Brake And Dc Feeding (Pr. 30, Pr. 70) - Mitsubishi Electric FR-A720-00030-NA Instruction Manual

4.14.2 Selection of regenerative brake and DC feeding (Pr. 30, Pr. 70)

When making frequent starts/stops, use the optional high-duty brake resistor (FR-ABR), brake unit (FR-BU2,
BU, FR-BU, MT-BU5) to increase the regenerative brake duty.
Use a power regeneration common converter (FR-CV) or power regeneration converter (MT-RC) for continuous
operation in regenerative status.
Use a high power factor converter (FR-HC, MT-HC) to reduce harmonics, improve the power factor, or
continuously use the regenerative mode.
You can select either DC feeding mode 1 in which operation is performed with DC power (terminal P/+, N/-) or
DC feeding mode 2 in which operation is performed normally with the AC power (terminal R/L1, S/L2, T/L3) and
performed with DC power such as battery at occurrence of power failure.
Parameter
Name
Number
Regenerative function
30
selection
Special regenerative
70
brake duty
<FR-A720-02150(FR-A740-01100) or less>
Regeneration Unit
Built-in brake (FR-A720-00330
(FR-A740-00170) or less),
,
brake unit (FR-BU2 FR-BU, BU)
*1
High-duty brake resistor (FR-ABR)
(FR-A720-00900
(FR-A740-00440) or less)
High power factor converter (FR-HC),
power regeneration common
converter (FR-CV)
Setting Range
Initial
200V class
Value
(400V class)
0
10
20
1
0
11
21
2
02150
(01100) 0 to 30%
or less
0%
02880
(01440) 0 to 10%
or more
Power Supply to
Pr. 30
the Inverter Setting
0
R/L1, S/L2, T/L3
(initial value)
P/+, N/- 10
R/L1, S/L2, T/L3 -
20
P/+, N/-
R/L1, S/L2, T/L3 1
P/+, N/- 11
R/L1, S/L2, T/L3 -
21
P/+, N/-
P/+, N/- 2
Motor brake and stop operation
Description
Regeneration unit
Built-in brake resistor, inverter
without regenerative function,
,
brake unit (FR-BU2 FR-BU,
*1
BU type)
High-duty brake resistor, brake
unit (FR-BU2 MT-BU5),
*2,
power regeneration converter
(MT-RC)
High power factor converter
(FR-HC, MT-HC), power
regeneration common
converter (FR-CV)
Set the %ED of the built-in brake transistor operation.
Pr. 70
Setting
The regenerative brake duty is as follows.
 FR-A720-00030 to 00175 . . . 3%
 FR-A720-00240, 00330 . . . . 2%

 FR-A740-00015 to 00170 . . . 2%
 Other than the above . . . . . . 0%
(without built-in brake resistor)
Change the setting according to the
capacity.
(FR-A720-00330(FR-A740-00170) or less
10/6%
/
FR-A720-00460(FR-A740-00230) or
more)
0
(initial value)
Terminal for power
supply to the inverter
R/L1, S/L2, T/L3
P/+, N/-
(DC feeding mode 1)
R/L1, S/L2, T/L3 - P/+, N/-
(DC feeding mode 2)
R/L1, S/L2, T/L3
P/+, N/-
(DC feeding mode 1)
R/L1, S/L2, T/L3 - P/+, N/-
(DC feeding mode 2)
P/+, N/-
Remarks
211
4