Dear Forum members,
I need a clarification for a practical problem. One of
our customer is planning to set up a test bed for 750 V DC 900 KW DC motor. The
scheme is as follows :
There will be 3 Nos of 625 KVA 415 V AC DG synchronising panel which will be
used to power a test bed. The 3 DG's will be synchronised and fed to
transformer rating of 1500 KVA 415 V AC ( primary- star and secondary - Delta)
through a ACB of 415 V rating. This is step up transformer which steps up yhr
voltage from 415 V AC to 800 V AC . The secondary of transformer is connected
to Thyristor panel through a ACB. My doubt is regarding the specifications of
ACB. in order to feed a constant voltage of 750 v DC to the DC motor whether
800 V AC is sufficient. Do we not have to account for the Voltage drop in the
cable and the thyristor panel. I think as per the above reply given by Mr. GW,
the AC voltage on the input side of Thyrisator panel should be
V ac= 0.816 x Vdc. Is my calculation correct. What are the other factors to
be taken into consideration while selection of switchgear and transformer.
Please advice .
Regarding ACB Protection for SCR Panel
Re: Regarding ACB Protection for SCR Panel
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