YASKAWA A1000 Series Technical Manual

5.8 L: Protection Functions
274 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Setting 0: Disabled
No alarm is detected.
Setting 1: Enabled
An alarm is triggered when the output current exceeds 150% of the drive rated current. A digital output set for an alarm
(H2- = 10) will close.
■
L8-55: Internal Braking Transistor Protection
Enables or disables protection for the internal braking transistor.
Setting 0: Disabled
Braking transistor protection should be disabled whenever the internal braking transistor is not used. This includes,
• when using a regen converter such as DC5.
• when using a regen unit such as RC5.
• when using external braking transistor options like CDBR units.
• when the drive is used in common DC bus applications and the internal braking chopper is not installed.
Enabling this L8-55 under such conditions can incorrectly trigger a braking transistor fault (rF).
Setting 1: Enabled
The following models come with a built-in braking transistor:
•CIMR-A2A0004 to 0138
•CIMR-A4A0002 to 0072
Enable L8-55 when connecting a braking resistor or a braking resistor unit to the drive built-in braking transistor.
No. Name Setting Range Default
L8-55 Internal Braking Transistor Protection 0 or 1 1

YASKAWA A1000 Series Specifications

General

Series	A1000
Type	AC Drive
Altitude	Up to 1000m without derating
Output Frequency	0-400 Hz
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Communication Options	Modbus, DeviceNet, Profibus, Ethernet/IP
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 60°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Horsepower	0.5 to 1000 HP
Power Range	0.4 - 630 kW (varies by voltage and model)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Cooling Method	Fan Cooled
Safety	Safe Torque Off (STO)