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Name (model)
Provides a braking capability greater than that is provided by an external brake resistor. This option can also be connected to the inverters without
built-in brake transistors. Three types of discharging resistors are available. Make a selection according to the required braking torque.
Specification
[Brake unit]
Model FR-BU2-
Applicable motor capacity
Connected brake resistor
Multiple (parallel) driving
Approximate mass (kg)
[Discharging resistor]
Model GRZG type
Number of
connectable units
Discharging
resistor combined
resistance ()
Continuous
operation
permissible power
Brake unit
(W)
FR-BU2-(H)
K
Combination between the brake unit and the resistor unit
Brake unit model
Resistor unit
FR-BR-(H)
K
200V
class
Discharging resistor
400V
GZG type
class
GRZG type
Selection method
[GRZG type]
The maximum temperature rise of the discharging resistors is about 100°C. Use heat-resistant wires to perform wiring, and make sure that they will
not come in contact with resistors.
Power
supply
voltage
200V
class
400V
class
The number next to the model name indicates the number of connectable units in parallel.
The 400V class 1.5K or lower capacity inverters cannot be used with brake units. When using brake units with inverters, use 2.2K or higher
capacity inverters.
[FR-BR]
The maximum temperature rise of the resistor unit is about 100°C. Therefore, use heat-resistant wires (such as glass wires).
ED at short-time rating when braking torque is 100%
Motor capacity
200V
FR-BU2-15K
class
FR-BU2-30K
400V
FR-BU2-H15K
class
FR-BU2-H30K
1.5K
3.7K
The applicable capacity differs by the braking torque and the operation rate (%ED).
GRZG type, FR-BR (For the combination, refer to the table below.)
Max.10 units (However, the torque is limited by the permissible current of the connected inverter.)
0.9
0.9
200V
GZG300W-
GRZG200-
GRZG300-
50
10
5
1 unit
3 in series 4 in series 6 in series 6 in series 8 in series 12 in series
50
30
20
100
300
600
Discharging resistor model or resistor unit model
GRZG type
FR-BU2-1.5K
GZG 300W-50 (1 unit)
FR-BU2-3.7K
GRZG 200-10 (3 in parallel)
FR-BU2-7.5K
GRZG 300-5 (4 in parallel)
FR-BU2-15K
GRZG 400-2 (6 in parallel)
FR-BU2-30K
FR-BU2-H7.5K
GRZG 200-10 (6 in parallel)
FR-BU2-H15K
GRZG 300-5 (8 in parallel)
FR-BU2-H30K
GRZG 400-2 (12 in parallel)
Motor (kW)
0.4
0.75
Braking torque
50% 30s
FR-BU2-1.5K
100% 30s
FR-BU2-1.5K
*2
50% 30s
*2
100% 30s
5.5kW 7.5kW
80
40
%ED
-- - - --
- - - -- -
80
40
%ED
-- - - --
- - - -- -
Regeneration duty factor (operation frequency)%ED =
Example 1 Travel operation
tb
tc
Specification and Structure
200V
7.5K
15K
30K
0.9
0.9
1.4
400V
GRZG400-
GRZG200-
GRZG300-
GRZG400-
2
10
5
12
60
40
1200
600
1200
2400
FR-BR
FR-BR-15K
FR-BR-30K
FR-BR-H15K
FR-BR-H30K
1.5
2.2
3.7
5.5
FR-BU2-3.7K
FR-BU2-7.5K
FR-
BU2-
FR-BU2-7.5K
FR-BU2-15K
3.7K
FR-BU2-H7.5K
FR-BU2-H7.5K
FR-BU2-H15K
Braking torque (%) at 10%ED in short-time rating of 15s(%)
Mortor capacity
11kW
15kW
15
10
200V
FR-BU2-15K
class
65
30
FR-BU2-30K
15
10
400V
FR-BU2-H15K
class
65
30
FR-BU2-H30K
tb
100
tb<15s (continuous operation time)
tc
Example 2 Lift operation
Ascending
Descending
Time t
t1
t2
t3 t4
tc
400V
H7.5K
H15K
H30K
0.9
0.9
1.4
[Resistor unit]
200V
Model FR-BR-
15K
30K H15K H30K
2
Discharging
resistor
8
4
32
combined
resistance ()
Continuous
operation
24
990
1990
990
permissible
power (W)
Approximate
15
30
15
mass (kg)
7.5
11
15
FR-BU2-15K
2FR-BU2-15K
*1
FR-BU2-H15K
FR-BU2-H30K
5.5kW
7.5kW
11kW
Braking
280
200
120
torque (%)
- - - -- -
- -- - --
260
Braking
280
200
120
torque (%)
- - - -- -
- -- - --
260
Time t
tb=t1+t2+t3+t4
400V
16
1990
30
15kW
100
180
100
180
60
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