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Can 600VLL be connected to an ION 7xxx meter that is connected as Single phase even though the Installation Manual shows 554V-LL?

The installation manuals show the following for a single phase system:

Two conditions must be satisfied:

  1. V-LN <347V
  2. V-LL<600V
  • For a three phase system running at 347V-LN, V-LL=sqrt(3)*600V and both conditions are met.
  • For a single phase system with 180 degree separation, if VLN=347V condition 1 will be satisfied, condition 2 fails (347V*2=694V).
  • If V-LL is limited to 600V, V-LN=600V/2=300V and both conditions are met.

Therefore, 600V-LL can be used for a single phases system.

The statement in the installation guide states 277V-LN/554V-LL because 277V-LN is a standard power level. This was put in to try and make things simpler for the end user although it could cause some confusion.



Last Revised: April 17, 2008
Applies To: ION 7300 / 7330 / 7350, 7500 / 7600, 7550 / 7650, 7700
Original Author: MN
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