CHEA6 -c centralized external alarm display, powerful, and it consists of two communication interface, a used to connect CHIM2200 monitors and CHIFL1600 insulation insulation fault locator, and to show the equipment performance parameters; Another is the communication interface with PC, so that will be more than IT isolated power network, complete the centralized processing of data. CHEA6 - C external alarm display, in line with the international electrotechnical society IEC60364-7-710:2002-11 and Finland SFS6000 standards.