21
8.4.6 Requirements for power supply wiring
Correct
Wrong
Power
distribution
transformer
Power
distribution
transformer
Power
380-415V
3N~50Hz
Power
380-415V
3N~50Hz
Uint
Manual
switch
Manual
switch
Lightning
arrester
Grounding
wire
Building
Fuses
Fuses
Grounding 1
Grounding 2
Grounding 3
Uint
Lightning
arrester
Grounding
wire
Surge
current
Grounding 1
Grounding 2
Grounding 3
Fig. 8-11 Requirements of power supply wiring
NOTE
• Do not connect the grounding wire of the lightning arrester to the unit shell. The grounding wire of the
lightning arrester and the power supply grounding wire must be configured separately.
Summary of Contents for KEM-90
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