400V 3Phase

[Hummi]

Hi All,

I have a question hoping I can get some help. I wanted to know if you can use a 400V 3 phase supply (A/A/A) terminated on the primary side of a TMD breaker can you take 2 phases from the secondary side of the breaker (A/A) excluding the 3rd phase to continue and create a 400V supply and use to power up your load/equipment.

 

[che12345]

If your 3-phase 400V supply is connected to a 3-phase breaker incoming A1,B1,C1, the outgoing A2, B2, C2 will also be having 3-phase 400V. Your question is you connect say A2 and B2 only. It can power any single-phase load/equipment rated 400V. Note: this load which is connected to lines A2 and B2, is considered as a single-phase load and shall be rated for 400V. Attention: not many single-phase load/equipment are rated at 400V.
Che Kuan Yau (Singapore)