Delta Electronics VFD-L Series Spezifikationen PDF herunterladen (Seite 35)

VFD-M Series

5-9

Pr.25

Over–Voltage Stall Prevention

Settings 115V/230V series 330-450Vdc Factory Setting: 390

460V series 660-900Vdc Factory Setting: 780

575V series 825-1025Vdc Factory Setting: 975

00 disable



During deceleration, the DC bus voltage may exceed its maximum allowable value due to

motor regeneration. When this function is enabled, the AC drive will stop decelerating,

and maintain a constant output frequency to prevent from over-voltage tripping. Drive will

resume deceleration when the voltage drops below the setting for Pr.25.

Note: In applications where inertia is low, over-voltage during deceleration would not occur.

When inertia is high, the AC drive will automatically extend the deceleration period. If a

faster stop is needed, then a dynamic braking resistor should be used.

DC bus voltage

time

Over-voltage

detection

level

output

Freq.

time

Over-voltage Stall Prevention

Pr.26

Over-Current Stall Prevention during Acceleration Factory Setting: 150%

Settings 20 to 200% Unit: 1%

00 disable

 A setting of 100% is equal to the Rated Output Current of the drive.

 Under certain conditions, the AC drive output current may increase abruptly, and exceed

the value specified by Pr.26. This is commonly caused by rapid acceleration or excessive

load on the motor. When this function is enabled, the AC drive will stop accelerating and

maintain a constant output frequency. Drive will resume accelerating only after the

current drops below the setting for Pr.26.

Pr.27

Over-Current Stall Prevention during Operation Factory Setting: 150%

Settings 20 to 200% Unit: 1%

00: disable

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Delta Electronics VFD-L Series Spezifikationen Seite 35