TDK-Lambda Alpha 800 Mode D'emploi page 14

Alpha 800 Handbook
Primary mains circuits to secondary -4.25 - 4.35kVDC.*
Outputs to each other and to earth are isolated to 500VDC.
*This test is not possible with Y capacitors fitted to the unit as damage to these capacitors may occur)
Page 14 of 28 17026 issue 20, April 2016