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YASKAWA A1000 Series Technical Manual

YASKAWA A1000 Series
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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-A2A0004 to 0138
•CIMR-A4A0002 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

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YASKAWA A1000 Series Specifications

General IconGeneral
SeriesA1000
TypeAC Drive
AltitudeUp to 1000m without derating
Output Frequency0-400 Hz
Control MethodV/f Control
Overload Capacity150% for 60 seconds
Communication OptionsModbus, DeviceNet, Profibus, Ethernet/IP
Ambient Temperature-10 to 50°C
Storage Temperature-20 to 60°C
Humidity5% to 95% (non-condensing)
Enclosure RatingIP20
Horsepower0.5 to 1000 HP
Power Range0.4 - 630 kW (varies by voltage and model)
Protection FeaturesOvercurrent, Overvoltage, Undervoltage, Overheat
Cooling MethodFan Cooled
SafetySafe Torque Off (STO)

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