Which standard should be apply for mediun voltage converter

Andy.Yang

广东安规检测
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Now my company wanna have a UL certification for our medium voltage converter, brief introduction as below:
% V0 d) d" c$ q  Q/ l0 B. k" a---------------------------------------------------------------------------------------------------------------------
% }3 ]- N6 @# [4 ^. l  _$ QPower cell: input:690V/3 phases, output voltage and frequency can be adjusted.
0 ^0 h% O4 j# h1 A7 S9 V$ `System:6 power cells in series, and then the total output voltage can be very high.
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7 u' M% z! M& O6 q! m1 u/ FAfter checking the UL standards, I think UL508C and UL347A will be used, but UL508C only applies to 1500V and below, UL347A is for more than 1500V. From my side, I think UL347A is a supplement for UL508C, so I feel our products should follow UL508C first for the power cell, then for system, we can use UL347A....

' y3 S" X! d' V1 H0 aAm I right, or if my friends have other advise or instruction, pls kindly instruct me.
- O6 X1 g6 k, t
1 h+ d& @" X+ S0 c% Y+ ?4 RThanks!