Selection Of Regenerative Brake (Pr. 30, Pr. 70) (75K Or More) - Mitsubishi Electric FR-B-750 to 75K Instruction Manual

Motor brake and stop operation

4.10.2 Selection of regenerative brake (Pr. 30, Pr. 70) (75K or more)

Setting can be made only for FR-B series.
When making frequent starts/stops, use the brake unit (FR-BU, MT-BU5) to increase the regenerative brake
duty.
Use a power regeneration converter (MT-RC) for continuous operation in regenerative status.
Use a high power factor converter (MT-HC) to reduce harmonics, improve the power factor, or continuously use
the regenerative mode.
CAUTION
The regenerative brake option (brake unit) can be used with the 75K or more of FR-B series. Cannot be used with the 55K or less.
Parameter
Name
Number
Regenerative function
30
selection
Special regenerative
70
brake duty
Regeneration Unit
Not used
Power regeneration converter (MT-RC) R/L1, S/L2, T/L3
Brake unit (MT-BU5)
High power factor converter (FR-HC)
(1) When the built-in brake resistor, the brake unit (FR-BU) is used
⋅ Set "0 (initial value)" in Pr. 30. The Pr. 70 setting is made invalid.
At this time, the regenerative brake duty is as follows. (The built-in brake resistor is provided for the 7.5K or less.)
⋅ FR-B-750 to 3700(200V) ........................ 3%
⋅ FR-B-5.5K, 7.5K(200V) .......................... 2%
⋅ FR-B-750 to 7.5K(400V) ........................ 2%
⋅ FR-B-75K or more (200V/400V)............. 0% (without built-in brake resistor)
(2) When using a brake unit (MT-BU5) and power regeneration converter (MT-RC) (FR-B-75K or
more)
⋅ Set "1" in Pr. 30.
⋅ Set "10%" in Pr. 70 when using a brake unit (MT-BU5).
⋅ Set "0%" in Pr. 70 when using a power regeneration converter (MT-RC).
102
Setting Range
Initial
Value
FR-B FR-B3

0
0

1

2

0% 0 to 10%*
Power Supply to the
Inverter
R/L1, S/L2, T/L3
R/L1, S/L2, T/L3
P/+, N/-
Description
Regeneration unit
Built-in brake resistor, without
regenerative function, brake unit
(FR-BU type)
Brake unit (MT-BU5), power
regeneration converter (MT-RC)
Supports capacities of the FR-B-
75K or more.
High power factor converter (MT-
HC)
Supports capacities of the FR-B-
75K or more.
Set the %ED of the built-in brake transistor operation.
* Supports capacities of the FR-B-75K or more.
Pr. 30 Pr. 70
Setting Setting
0

(initial value)
0%
1
(initial value)
1 10%

2
B B
Terminal for power
supply to the inverter
R, S, T
R, S, T
P, N