J
Jonathan Barnes
- Jan 1, 1970
- 0
Please help a mechanical engineer with an electrical problem.
If 3 equal heating elements are connected in star to a 400 V 3 phase supply
then each element has 230 V across it.
In this condition the star point will be at the neutral voltage,
If one element blows each remaining element will have 200 V across it , and
the star point will have a 100 V difference from neutral.
I have a system where each leg consists of two heating elements in parallel.
If a single element blows the remaining element on that leg will be subject
to a voltage which must be less than 330 V, but more than 230 V.
The other two legs will be between 200 V and 230 V each.
The star point must have a voltage to neutral of less than 100 V.
Can anyone tell me what the actual voltages will be, and how they are
calculated... or a good reference.
--
Jonathan
Barnes's theorem; for every foolproof device
there is a fool greater than the proof.
To reply remove AT
If 3 equal heating elements are connected in star to a 400 V 3 phase supply
then each element has 230 V across it.
In this condition the star point will be at the neutral voltage,
If one element blows each remaining element will have 200 V across it , and
the star point will have a 100 V difference from neutral.
I have a system where each leg consists of two heating elements in parallel.
If a single element blows the remaining element on that leg will be subject
to a voltage which must be less than 330 V, but more than 230 V.
The other two legs will be between 200 V and 230 V each.
The star point must have a voltage to neutral of less than 100 V.
Can anyone tell me what the actual voltages will be, and how they are
calculated... or a good reference.
--
Jonathan
Barnes's theorem; for every foolproof device
there is a fool greater than the proof.
To reply remove AT