Siemens 5SD7444-1 Combination arrester type 1+2 Requirement class B+C, UC 350V Pluggable protective modules 4-pole, 3+1 circuit for TN-S and TT systems with remote display
Siemens 5SD7444-1 Combination arrester type 1+2 Requirement class B+C, UC 350V Pluggable protective modules 4-pole, 3+1 circuit for TN-S and TT systems with remote display