YASKAWA L1000A Series, Техническое руководство

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5.8 L: Protection Functions
■ L8-39: Reduced Carrier Frequency
Determines value the carrier frequency is reduced to by the torque boost function.
No. Name Setting Range Default
L8-39 Reduced Carrier Frequency 1.0 to 15.0 kHz 3.0 kHz
■ L8-55: Internal Braking Transistor Protection
Enables or disables protection for the internal braking transistor.
No. Name Setting Range Default
L8-55 Internal Braking Transistor Protection 0 or 1 1
Setting 0: Disabled
Disable braking transistor protection when not using the internal braking transistor, including the following instances:
• 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 using the drive in common DC bus applications and the internal braking chopper is not installed.
Enabling 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-LD2A0018 to 2A0115
• CIMR-LD4A0009 to 4A0060
Enable L8-55 when connecting a braking resistor or a braking resistor unit to the drive built-in braking transistor.
Overload Tolerance for Internal Braking Transistor
Below, Figure 5.40 show the overload tolerance level for the drive’s built-in braking transistor.
Operation Time (s)
F ig u r e 5 .4 0 O v e r lo a d T o le r a n c e f o r B ra k in g T r a n s i s t o r (C IM R -L D 2A 0018 to 2A 0115, C IM R -L D 4A 0009 t o 4A 0060)
202 YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual