KUHNKE Automation 6.3 Power Supply Power is supplied through the mounting rail adapter. The power supply must meet the following criteria: For Europe: 3 x 400 V AC (± 10 %) without N conductor , to the TT , TN-C or TN Network identification / network configurations in the USA 400Y/230 V ( solidy grounded wye , 3 phase, 4 wire ) The thermo-controller is only designed for non-public mains connected to the public medium-voltage to high-voltage grid. In order to operate the thermo-controller on public mains, external noise suppression and limited parameter value will help to conform to IEC 61000- 3-12. Please contact Product Management at our central office.
6.3.1 Short circuit Rating (SSCR) Suitable For Use On A Circuit Capable Of Delivering Not More Than 50,000 rms Symmetrical Amperes, 400 Volts Maximum when each heater load out- put is protected by a Class CC fuse rated 600V, max. 12 A in each of the power lines, see wiring diagram. (note chapter 6.7.2) The Wцhner bus bar adapters shall be protected by Class J fuses rated 600V, max. 150A E 774 GB 27 30.06.2014