JovialBulge
Member
- Location
- New England
- Occupation
- Automation Dude
If you were to have a panel with multiple vfds would you:
a) take the input current ratings for each of the vfds and add them together to get the calculation according to 30.2.2 c)
b) same as a) then multiply by 115%
c) take the highest rated input current from all vfds (this section of code only mentions a vfd and does not use vfd(s) so I listed this as an option) and add that with all of the other remaining motor FLAs from Table 50.1 for the other motors that are vfd controlled.
d) same as c) then multiply by 115%
30.2.2
A molded-case switch, a switch unit, a fused power circuit switch, a pullout switch, and an open or enclosed switch shall have:
c) For one or more motors or for one motor and any other load(s), an ampere rating or a horsepower rating with an equivalent full-load current:
1) Not less than 115 percent of the full load current ratings of all motors, in accordance with
Table 50.1 or the input current rating of a variable speed drive plus the full-load currents of
all other loads
a) take the input current ratings for each of the vfds and add them together to get the calculation according to 30.2.2 c)
b) same as a) then multiply by 115%
c) take the highest rated input current from all vfds (this section of code only mentions a vfd and does not use vfd(s) so I listed this as an option) and add that with all of the other remaining motor FLAs from Table 50.1 for the other motors that are vfd controlled.
d) same as c) then multiply by 115%
30.2.2
A molded-case switch, a switch unit, a fused power circuit switch, a pullout switch, and an open or enclosed switch shall have:
c) For one or more motors or for one motor and any other load(s), an ampere rating or a horsepower rating with an equivalent full-load current:
1) Not less than 115 percent of the full load current ratings of all motors, in accordance with
Table 50.1 or the input current rating of a variable speed drive plus the full-load currents of
all other loads