FANUC Power Mate i-MODEL H CONNECTION MANUAL (HARDWARE)

3. INSTALLATION
B63173EN/03
24
To protect the devices from surge voltages due to lightening, it is
recommended to install surgeabsorbing elements between the lines of
the input power and between one line and ground. This does not,
however, assure protection from all surges due to lightening.
The recommended items are as follows. (Items made by Okaya Denki
Sangyo Co.)
For the 200V system
Between lines R S A S V781BYZ2
Between line and ground R S A S V781BXZ4
For the 400V system
Between lines R S A S V152BYZ2A
Between line and ground R S A S V801BXZ4
The surgeabsorbing elements used for measures against surges due to
lightening must be installed in the input power unit as shown in the figure
below. The figure below shows an example in which an insulating
transformer, shown by dotted lines, is not installed. If an insulating
transformer is installed, surgeabsorbing element 2 (between line and
ground) is not required.
R
S
T
PE
a
b
AC
input
Insulating
trans-
former
Nonfuse
breaker
Nonfuse
breaker
To CNC
AC
reac-
tor
Servo unit
power
supply
module
M
C
C
5A
Nonfuse
breaker
To other electric parts
on the machine
Surgeabsorbing element À
(between lines)
Surgeabsorbing element Á
(between line and ground)
Input
break-
er
External 24VDC
power supply
3.6.6
Measures Against
Surges due to
Lightning
Installation procedure

Leave a Reply

Your email address will not be published. Required fields are marked *