PP BCD TT 25/100 (F/M)
 

This combined four-pole SPD type PP BCD TT 25/100 and PP BCD TT 25/100/FM, with remote signal contacts, connected in the so called 3+1 circuit, offer a complete solution for the protection of TT-Power Net Systems. They are usually installed in main-or sub-distribution panel or before the equipment to be protected.