MCGG 22 52 62 82 Alstom

JUAL/SELL : MCGG relays is designed so that versions are available with separate measuring boards for each phase or earth fault input; alternatively, phase inputs may be combined on to one board for polyphase measurement ( see table) . These boards, together with the other circuits of the relay, are contained in a single plug-in module which is supplied in a size 4, 6 or 8 Midos case. The case incorporates one or two terminal blocks for external connections. Removal of the module automatically short circuits the current transformer connections by means of safety contacts within the case terminal block. For added security, when the module is removed, the CT circuits are short circuited before the connections to the output contacts and the dc supply are broken. The relay uses solid state techniques, each measuring board utilising a micro- computer as a basic circuit element.