YASKAWA A1000 Installation Manual page 50

5.3 Installing Peripheral Devices
Max. Applicable Motor
kW (HP)
185 (300)
220 (350)
250 (400-450)
315 (400-450-500)
355 (500-550)
Using Braking Units in Parallel
Only A1000 model CIMR-A 4T0675 can accept up to two braking units. Smaller 6-Phase/12-Pulse models are not
compatible with parallel (more than one) braking units.
Installing Other Types of Braking Resistors
When installing braking resistors other than the LKEB type, make sure that the braking transistor in the braking unit will
not be overloaded with the required duty cycle and the selected resistance value. Use a resistor that is equipped with a
thermal overload relay contact, and utilize this contact to disconnect main power to the drive in case of braking resistor
overheat.
Braking Resistor Overload Protection
If using a braking resistor option, a sequence such as the one shown in
supply in case the braking resistor overheats.
Figure 5.1
400 V
MC MB 2MCCB THRX
Braking Resistor Unit
Thermal Relay Trip Contact
1
<1> A braking unit cannot be connected to the CIMR-A 4T0058 and 0072 drives.
<2> A braking resistor can be connected to the B1 and B2 terminals on the CIMR-A 4T0058 and 0072 drives.
Figure 5.2 Power Supply Interrupt for Braking Resistor Overheat Protection (Example)
50
Drive Duty
Normal Duty
Heavy Duty
Normal Duty
Heavy Duty
Normal Duty
Heavy Duty
Normal Duty
MC
R
S
T
OFF ON MC
SA
MC
THRX
2
SA
TRX
SA
MC MA
TRX
Fault Relay
Contact
YASKAWA ELECTRIC TOEP C710616 50B YASKAWA AC Drive - A1000 6-Phase/12-Pulse Input Installation Guide
A1000 Drive
CIMR-A 4T
0362
0414
0414
0515
0515
0675
0675
Figure 5.2
R/L1
+3
Y S/L2
T/L3
R1/L11
S1/L21
T1/L31
Drive
Braking Unit
Max Allowable Qty
CDBR-
4220
4220
4220
4220
4220
is recommended to interrupt the power
Braking Unit
Braking Resistor Unit
(CDBR Type)
(LKEB Type)
<1> <2>
1 2
-
1
1
1
1
1
2
2