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FANUC LTD
DESCRIPTION DESIGN DATE
EDIT
FANUC SERVO AMPLIFIER
βi series DESCRIPTIONS
B-65322EN/02-02
10. Installing of lighting surge absorber
Main circuit
power input
Power supply
(Grounded to a neutral point on
tthe Y wire)
C400V/480V
Control power
input
βiSVM
To other units
Lighting surge absorber between
power lines
(R.A.V-152BYZ-2A)
Circuit breaker 1
Magnetic
contactor
AC line filter
Ground-fault circuit
interrupter for power
magnetic cabinet
Ground plate
Lighting surge absorber between each
power line and ground
(R.A.V-801BXZ-4)
β
i
SVM
Circuit breaker 2 (5A)
(a)
(b)
Stabilized
power supply
(DC24V)
CAUTIONS
(1) To increase the efficiency of lightning surge absorption, the wires indicated by bold
lines should be as short as possible.
Wire cross-sectional area : 2 mm
2
or more
Wire length :
The total length of the cables used for line-to-line lightning surge protector (a) and
that used for line-to-ground lightning surge protector (b) must not exceed 2 m.
(2) When performing a dielectric strength test by applying an overvoltage to the power
line, line-to-ground lightning surge protector must be removed to enable the applied
voltage to be maintained.
(3) The circuit breaker 2 (5A) works for line protection when the lightning surge absorber
is short-circuited because of a surge higher than its rating being applied.
(4) Because current does not flow through lightning surge protector in a normal state, the
circuit breaker 2 (5A) can be used together with the surge absorbers as well as with
other equipment.