YASKAWA S Series User Manual page 95

Application
5.7.1 Noise Control
E Correct Grounding
■ Using a Noise Filter
Always observe the installation and wiring instructions shown in Figs. 5.5 to 5.8. Incorrect use of a noise filter
IMPORTANT
reduces its benefits.
Motor Frame Grounding
If the Servomotor is grounded via the equipment frame, switching noise current (Cf dv/dt) will
flow from the SERVOPACK power unit (PWM) through motor stray capacitance (Cf). Always
connect the Servomotor ground terminal (FG) to the SERVOPACK ground terminal t o pre-
vent adverse effects from switching noise. Be sure to ground the ground terminal.
SERVOPACK SG 0 V
If the reference input line is subjected to noise, ground the SG 0 V line. If the main circuit wiring
for the motor is in a metal conduit, ground the conduit as well as the junction box. Always ground
to one point only.
Use an inhibit-type noise filter to block noise from the power supply line. Table 5.3 lists recom-
mended noise filters for each SERVOPACK. Also install a noise filter on the power supply line
for peripheral equipment if needed.
Table 5.3 N o i s e Filters
SERVOPACK Model
0.5 kW SGDB-05AN
1.0 kW SGDB-10AN •
1.5 kW SGDB-15AN
2.0 kW SGDB-20AN
3.0 kW SGDB-30AN
5.0 kW SGDB-50AN
6.0 kW SGDB-60AN
7.5 kW SGDB-75AN
SGDB-1AAN
11.0 kW
15.0 kW SGDB-1EAN
These noise filters other than model FN258-100 are made by Tokin Corp. Tokin
Corp. noise filters are available from Yaskawa. Contact your nearest Yaskawa
sales representative for those noise filters. A noise filter type FN258-100 is made
by SCHAFFNER.
Recommended Noise Filter*
Noise Filter
Connection
Model
LF-310
LF-315
(Correct)
o -
LF-320
; 1
LF-330
LF-340
(Incorrect)
LF-350
LF-360
LF-380K
FN258-100
5 -14
Specifications
Three-phase 200 VAC, 10 A
Three-phase 200 VAC, 15 A
Three-phase 200 VAC, 20 A
Three-phase 200 VAC, 30 A
Three-phase 200 VAC, 40 A
Three-phase 200 VAC, 50 A
Three-phase 200 VAC, 60 A
Three-phase 200 VAC, 80 A
Three-phase 200 VAC, 100 A