a- Main A.S.P auxiliary source panel must have the following specifications:  1- Two incoming circuit breaker 630 A Isc 70 KA, 4 poles, the first one normal & the second is emergency.  2- Four outgoers Circuit Breakers 400A, Isc 50 KA, 4 poles   3- Two Circuit Breakers 100A, Isc 50 KA, 4 poles.  4- The panel must contain automatic change over system for the normal & emergency sources..  b- Four Isolators Switch 630A, 4 poles, type MG..   c- The charger (master slave) must be equipped with main & stand by floating voltages 126 VDC equalizing voltage 136 VDC & pulse regulated voltage output for the control panel beside the battery sours.  d- Four set Alkaline batteries 1,3 v per cells , capacity set 200A/H , floating voltage 126 VDC, Equalizing voltage 135 VDC ......