TheElevatorGuy
Member
- Location
- New York, New York
It is my understanding from the code that wire size is based on 125% of the input Amps of the drive. Can someone tell me how to size the fuses feeding it? Thanks in advance.
Size wire and Fuses for a VVVF drive
- Thread starter TheElevatorGuy
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Check the mfg instructions, they often will specify a specific fuse type, such as. Type T, and size
What is a VVVF?
What is a VVVF?
kwired
Electron manager
- Location
- NE Nebraska
If you carefully read instructions often the expensive current limiting fuses are often only required when available fault current is over a certain level.
Reality is if front end of drive develops a fault, all the current limiting fuse will do is possibly lessen how spectacular of a show the fault event will be. The drive is still damaged.
Reality is if front end of drive develops a fault, all the current limiting fuse will do is possibly lessen how spectacular of a show the fault event will be. The drive is still damaged.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
It’s difficult to protect IGBTs in a drive, they are much faster than a fuse if the drive output faults
noonan
Member
- Location
- Bucks County, PA
- Occupation
- Project Manager
variable voltage variable frequency?
TheElevatorGuy
Member
- Location
- New York, New York
Yes. That is the name I have always known them to be. Is there a different name you know? Thank you.
TheElevatorGuy
Member
- Location
- New York, New York
Variable Voltage Variable Frequency. I checked with the manufacturer and they specify the fuses required. Thank you for your help.
zbang
Senior Member
- Location
- Roughly 5346 miles from Earls Court
Much more usually "Variable Frequency Drive" or VFD (I've never heard vvvf, either). Some people even shorten VFD to "the drive", which I find a touch ambiguous.
"Many fuses are protected by fast-blowing electronic components"
"Many fuses are protected by fast-blowing electronic components"
TheElevatorGuy
Member
- Location
- New York, New York
Thank you Z. I agree with you. "The drive" for the elevator industry could refer to and SCR drive or a VFD. There are many more D.C. motors in New York City running elevators than A.C. motors however anything installed new is requested to be A.C.
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