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I have a customer getting ready to install some Variable Frequency Drives (single channel 4 amp max output) and he (and I) have a question about fusing and protection techniques. Please inform me of your suggestions in this matter:
1. If using 1/2 HP 480VAC motor, what size fuses would you use? (Also 1/3 hp and 1/4 hp @ 480 vac)
2. What type fuses would you use (time delay, non-time delay, etc)?
3. If using a time delay fuse, are there any considerations for the currents that can be reached while the fuse is in this "delay" period. Some currents can get rather high.
4. Are there any other considerations that need to be looked at to protect these drives?
1. If using 1/2 HP 480VAC motor, what size fuses would you use? (Also 1/3 hp and 1/4 hp @ 480 vac)
2. What type fuses would you use (time delay, non-time delay, etc)?
3. If using a time delay fuse, are there any considerations for the currents that can be reached while the fuse is in this "delay" period. Some currents can get rather high.
4. Are there any other considerations that need to be looked at to protect these drives?