Choosing A Braking Unit - Hitachi L300P Series Instruction Manual

5–8
Dynamic Braking
Choosing a
Braking Unit
25 to 175 hp (18.5 to 132 kW)
Voltage
Class
200V
400V
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.
Model Number
Motor
hp
L300P
–185LFU2
25
–220LFU2
30
–300LFU2 40
–370LFU2 50
–450LFU2 60
–550LFU2 75
–750LFU2 100
–185HFU2, HFE2 25
–220HFU2, HFE2 30
–300HFU2, HFE2 40
–370HFU2, HFE2 50
–450HFU2, HFE2 60
–550HFU2, HFE2 75
–750HFU2, HFE2 100
–900HFU2, HFE2 125
–1100HFU2, 150
HFE2
–1320HFU2, 175
HFE2
Peformance Versus External Braking Unit
Without
Braking
Unit
Braking
Braking Unit
Torque,
Model
%
10 BRD–E2–N
10 BRD–E2–30K
10 BRD–E2–N
10 BRD–E2–30K
10 BRD–E2–30K
10 BRD–E2–55K
10 BRD–E2–55K
10 BRD–E2–55K
10 BRD–E2–55K
10 BRD–E2–55K
10 BRD–EZ2–N
10 BRD–EZ2–30K
10 BRD–EZ2–N
10 BRD–EZ2–30K
10 BRD–EZ2–55K
10 BRD–EZ2–55K
10 BRD–EZ2–55K
10 BRD–EZ2–55K
10 BRD–EZ2–55K
10 BRD–EZ2–55K
10 BRD–EZ2–55K
10 BRD–EZ2–55K
With Braking Unit
Minimum
Max. Resistance
Minimum
Braking
Resistance,
Duty Cycle,
Ohms
% Duty Cycle,
17 10
4 20
17 10
4 20
4 20
2 20
2 20
2 20
2 20
2 20
34 10
10 10
34 10
10 10
6 20
6 20
6 20
6 20
6 20
6 20
6 20
6 20
@ 100%
Braking
Ohms
46
6
46
6
6
4
4
4
4
4
100
24
100
24
12
12
12
12
12
12
12
12