2-36
• Be
sure that no gaps are created when installing the cover
, as can be cause by distortion when tighten
-
ing screws.
Case
Case
Cover
Conductive
packing
Oil-proof
packing
Control
panel
Conductive
packing
Oil-proof
packing
Case (inside)
j Selecting Components
D No-fuse Breakers (MCCB)
When
selecting no-fuse breakers, take into consideration the maximum output current and the inrush
current. The momentary maximum output for a servo system is approximately three times that of the
rated output, and a maximum output of three seconds can be executed. Therefore, select no-fuse
breakers
with an operating time of at least five seconds at 300% of the rated maximum output. General-
purpose and low-speed no-fuse breakers are generally suitable. Refer to the table in
2-2-3 Terminal
Block
W
iring
for the power supply input currents for each motor
, and
then add the current consumption
for the number of shafts, other controllers, etc., to make the selection.
The
Servo Driver inrush current flows at
a maximum of 50 A for 20 ms when 200 V is input. With low-
speed
no-fuse breakers, a inrush current 7 to 8 times the rated current flows for 0.1
second. When mak
-
ing the selection, take into consideration the entire inrush current for the system.
D Surge Absorbers
Use surge absorbers to absorb surges from power supply input lines due to lightning, abnormal volt-
ages,
etc. When selecting surge absorbers, take into account the varistor
voltage, the amount of surge
immunity,
and the amount of energy resistance. For 200-V
AC systems, use a varistor voltage of 470
V
.
The surge absorbers shown in the following table are recommended.
System Design and Installation
Chapter
2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
