0-1 symmetric matrix of positive line
±500 kV ultrahigh voltage DC transmission line
1 000 kV AC power transmission line
1 000 kV transmission line
1.8 billion hectare red line
10 kV distribution line
10 kV double distribution line
10 kV rural overhead line circuit
10 kV transmission line
10 kV transmission line distribution transformer
10 kV transmission line protection
1000 kV AC power transmission line
1000 kV AC transmission line
1000 kV UHV AC transmission line