silverwater153
Member
what size of breaker would i use for a 440 volts 800 kw 1430 ampere 3 phase generator set. urgent thanx
breaker size
- Thread starter silverwater153
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ultramegabob
Senior Member
- Location
- Indiana
a fifteen amp would work if your just running a clock radio...
silverwater153
Member
maximum generator current is 1430 amps
ultramegabob
Senior Member
- Location
- Indiana
.............
Last edited:
- Location
- Massachusetts
your not providing enough info to give a decent answer to.
What is the load?
What size conductors?
What is the application?
Just to name a few.
And the fact you said 440 volt raises a big question in my mind.
What is the load?
What size conductors?
What is the application?
Just to name a few.
And the fact you said 440 volt raises a big question in my mind.
Pierre C Belarge
Senior Member
- Location
- Westchester County, New York
Where did the 1443A value come from?
silverwater153
Member
prime application, 400 volts output, 4 sets of 500 mcm,
load- motors, 400 kw,75 kw, ++ total 500 kw
silverwater153
Member
1430 is the current output.
main breaker would be what?
i also need a breaker for a 480 v 762 ampere rating motor 3 phase
main breaker would be what?
i also need a breaker for a 480 v 762 ampere rating motor 3 phase
iMuse97
Senior Member
- Location
- Chicagoland
I suppose you've already gotten an answer, or made a decision, etc., but if you still want to know--
1. Your breaker could possibly be 1200 or 1600 ampere, but that would all depend on size of wire, type of wire, and other questions that impinge on engineering, as previous posts have mentioned.
2. For the motor, you're required to protect the wire in accordance with 430.52(A), 430.52(B), 430.52(C), Table 430.52(C), 430.52(D), and the interrupting capacity of the breaker shall be determined by 430.110, and also by finding the full-load current and the locked-rotor current in Tables 430.247-430.250, and 430.251(A) & (B).
Don't get in the deep water on this one, unless you've got the gear for it.
480 is sometimes called 440 just like the terms 110 and 120 or 220 and 240 are interchangeable.
shahnawazbachh
Member
what ever u have calculated for breaker ampere rating. Keep in mind at this level u also know the short circuit level before finalizing the breaker.(burden of breaker)
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