Braking Resistor ( Standard Type ); Braking Resistor ( Medium Capacity Type ) - Hitachi SJ300 Series Manual

Braking Resistor ( Standard type )

SRB-
□□□
Note 1:
The internal themal contact capacity is 250V
AC, 2A max. It is on under nomal condition
(NC contact).
2: Prevents abnormal heat resulting from the
incorrect use by internal temperature fuse.
(recovery not possible).
3: When the temperature relay is activated,
reduce regenerative energy by stopping the
inverter or by increasing deceleration time.
Model name
L1
SRB 200-1 310
SRB 200-2 310
SRB 300-1 470
SRB 400-1 435
Model name Capacity
SRB 200-1
SRB 200-2
SRB 300-1
SRB 400-1
Note 1: Please connect the same two braking resistors with the series when using for class of 400V.

Braking Resistor ( Medium capacity type )

RB1, RB2, RB3
Resistance value Rated capacity
Model name
( Ω )
RB1 50 400
RB2 35 600
RB3 17 1200
Note 1: For rated capacity, one cycle is within 100 sec.
2: Please connect the same two braking resistors with the series when using for class of 400V.
●Dimensional Drawings
100
150
70 2 - 5
5
Terminal
block
[Figure 1]
●Dimensional Drawings
●Connecting Diagram
Dynamic
Inverter braking unit
P
P
N N RB
Dimension ( mm )
L2 L3
295 160
295 160
455 320
422 300
Resistance value
180Ω
200W
100Ω
300W 50Ω
400W 35Ω
Instantaneous capacity Allowable braking cycle
( W ) ( W ) ( ％ )
2600 10
3800 10
7700 10
[Unit: mm]
100
2 - 5
70
5
Terminal
block
[Figure 2]
[Unit: mm]
Braking resistor
Alarm contact
1
P P
(NC contact)
ON under normal
RB 2
condition
H1 H2 W
67 12 64
67 12 64
67 12 64
94 15 76
Allowable braking cycle
10%
7.5%
7.5%
7.5%
Allowable continuous
Overheat protection
ON period ( sec. )
10 Thermal relay (NC contact) inside the resistor is
activated at abnormal high temperature.
10
Contact rating AC240V, 3A ( R load ) , 0.2A ( L load )
10 DC36V, 2A ( R load )
150
Terminal
●Circuit Diagram
Weight ( kg )
T
1.6 0.97
1.6 0.97
1.6 1.68
2.0 2.85
Allowable continuous ON period
30sec.
30sec.
30sec.
20sec.
Weight
Figure
1
2
3
150
2- 7
110
170
7
block
[Figure 3]
( kg )
2.5
3.6
6.5
38