Johannesburg
(011) 879-6620
Durban
(031) 569-9900
Cape Town
(021) 594-7100
Port Elizabeth
(041) 408-2400
L
N
E
7
Fig E - TT System Earthing
Fig F - IT Earthing System
Line earth loop resistance is the sum of wiring resistance, earth resistance and resistance of
transformer winding.
Line earth loop resistance is the sum of wiring resistance, earth resistance and resistance of
transformer winding.
L1
Transformer
Line
Earth Resistance
Current
Flow
L1
L2
L3
Line
DB
L2
E
Transformer
Neutral
Earth
Earth Resistance
Current
Flow
L1
L2
L3
Line
DB
Earthing Impidance
Typical more than 1000
Ω
Consumers
Earth Terminal
Содержание ACADEMY T419
Страница 1: ......
