FAQ: During a generator to line power switchover, Uv1 results. Restart is not attempted. A manual reset is required for drives running motors. The transfer takes less than a second. Is there any fix for this issue?
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Setting L2-01 (Momentary Power Loss Operation Selection) to setting 2: Enable while CPU is active. Enabling Power loss ride while CPU is active, causes a baseblock, a hard stop of the firing mechanisms to the motor. This prevents a Uv1 condition, and allows the drive to ramp up when the under volt condition is over.
This fix may need speed search to be enabled, please see the related FAQ link for OL or OV after generator to line transfer for assistance.
For additional information, please refer to SIEPYAIZ1B01, the technical manual.
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Please read and understand the product instruction manual before installing, servicing or operating Yaskawa products. FAQ content and illustrations are provided as technical advice to augment the information in manual, not supersede it. It is not possible to give detailed instructions for all types of installation or support activities. The information described in the FAQs are subject to change without notice to improve the product or FAQ. Yaskawa assumes no responsibility for errors or omissions or damages resulting from the use of the information contained in any FAQ. All warnings, cautions and product instruction for product use must be followed. Installation, operation and maintenance should be carried out by qualified personnel. Failure to observe these and other precautions highlighted in the product manuals will expose the user to high voltages resulting in, serious injury or death. Qualified personnel are defined as individuals who are familiar with the installation, starting, operation and maintenance of Yaskawa products of the type described and have proper qualifications to perform the work.
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If you have an urgent request, please call: 1-800-YASKAWA (927-5292) or 1-847-887-7000.Electronically
To contact us electronically, please select your type of request and complete the form.Yaskawa America, Inc. - Drives & Motion Division
2121 Norman Drive South
Waukegan, IL 60085