Choosing a braking unit – Hitachi L300P User Manual
Page 198
Dynamic Braking
Motor Contro
l
Ac
cess
or
ies
5–8
Choosing a
Braking Unit
The L300P Series 200V and 400V class inverter models in the 25 to 175 hp range require
external braking units to increase their braking torque. Braking units come in sizes correspond-
ing to the power handing requirements for particular resistor selections. Be sure to follow the
installation instructions accompanying each braking unit. The following table lists the L300P
inverter models and their applicable braking units.
25 to 175 hp (18.5 to 132 kW)
Peformance Versus External Braking Unit
Without
Braking
Unit
With Braking Unit
Voltage
Class
Model Number
L300P
Motor
hp
Braking
Torque,
%
Braking Unit
Model
Minimum
Resistance,
Ohms
Max.
Braking
Duty Cycle,
%
Minimum
Resistance
@ 100%
Braking
Duty Cycle,
Ohms
200V
–185LFU2
25
10
BRD–E2
17
10
46
10
BRD–E2–30K
4
20
6
–220LFU2
30
10
BRD–E2
17
10
46
10
BRD–E2–30K
4
20
6
–300LFU2
40
10
BRD–E2–30K
4
20
6
10
BRD–E2–55K
2
20
4
–370LFU2
50
10
BRD–E2–55K
2
20
4
–450LFU2
60
10
BRD–E2–55K
2
20
4
–550LFU2
75
10
BRD–E2–55K
2
20
4
–750LFU2
100
10
BRD–E2–55K
2
20
4
400V
–185HFU2, HFE2
25
10
BRD–EZ2
20
10
34
10
BRD–E2–30K
10
10
24
–220HFU2, HFE2
30
10
BRD–EZ2
20
10
34
10
BRD–E2–30K
10
10
24
–300HFU2, HFE2
40
10
BRD–EZ2–55K
6
20
12
–370HFU2, HFE2
50
10
BRD–EZ2–55K
6
20
12
–450HFU2, HFE2
60
10
BRD–EZ2–55K
6
20
12
–550HFU2, HFE2
75
10
BRD–EZ2–55K
6
20
12
–750HFU2, HFE2
100
10
BRD–EZ2–55K
6
20
12
–900HFU2, HFE2
125
10
BRD–EZ2–55K
6
20
12
–1100HFU2,
HFE2
150
10
BRD–EZ2–55K
6
20
12
–1320HFU2,
HFE2
175
10
BRD–EZ2–55K
6
20
12