Power protection unit for use with electronic circuit of phase failure guard for distribution network, has phasing line and neutral line, where phasing line has circuit breakers assigned for disconnection of phasing line

摘要

The power protection unit (1) has a phasing line (L1,L2,L3) and a neutral line (N). The phasing line has circuit breakers (4a,4b,4c) assigned for disconnection of the phasing line. The neutral line has a neutral line switch (5), which switches off the phasing line during electrical failure arising in the neutral line.