
B-65322EN/02 SVM 6.INSTALLATION CONDITIONS AND NOTES
- 39 -
6.4 INSTALLING LIGHTNING SURGE ABSORBERS
At the power input of the power magnetics cabinet, install a surge
absorber between the power lines and between each power line and a
ground to protect the unit from a voltage surge caused by lightning.
How to install the surge absorber is shown below.
(1) Surge absorber for three-phase input
When using an integrated lightning surge absorber between the
power lines and between each power line and a ground
(a)
(b)
Main circuit
power
input
Control power
supply input
200VAC
β
i SVM
Stabilized
power
supply
(24 VDC)
To other units
Lightning surge absorber between powe
lines and between each power line and
ground (R.C.M-601BUZ-4)
Circuit
breaker 1
Magnetic
contactor
C line filter
Circuit breaker 2
(5A)
Ground-fault circuit interrupte
for power magnetics cabinet
Ground plate
G
R
S
T
When using separate lightning surge absorbers between the power
lines and between each power line and a ground
R
(a)
(b)
Main circuit
power
input
200VAC
Control power
input
β
iSVM
Stabilized
power supply
(24 VDC)
To other units
Lightning surge absorber between
power lines (R.A.V-781BYZ-2)
Circuit
breaker 1
Magnetic
contactor
C line filter
Circuit breaker 2
(5A)
Ground-fault circuit interrupter
for power magnetics cabinet
Ground plate
G
S
T
Lightning surge absorber between
each power line and ground
(R.A.V-781BXZ-2)
β
i SVM