Yaskawa Large Capacity Sigma II Series - Manual (Page 47)

2 Basic Operation
2.3.2 Main Circuit Wiring and Power ON Sequence
2-20
Using 400 V, 37 kW or 55 kW
„ Note
• Do not bundle or run power and signal lines together in the same duct. Keep power and
signal lines separated by at least 30 cm (11.81 in).
• Use twisted-pair wires or multi-core shielded-pair wires for signal and encoder (PG)
feedback lines. The length for wiring is 3 m (118.11 in) maximum for the reference
input line.
• Do not touch the power terminal even if power was turned OFF. High voltage may still
remain in SERVOPACK. Make sure the charge indicator is out first before starting an
inspection.
• Avoid frequently turning power ON and OFF. Since the SGDH SERVOPACK has a
capacitor in the power supply, a high charging current flows for 0.2 seconds when
power is turned ON. Therefore, frequently turning the power ON and OFF causes the
main circuit devices (such as capacitors and fuses) to deteriorate, resulting in unex-
pected problems.
L1/R
DC24P
PG
U
V
W
M
+24V
0 V
24
1Ry
31
32
1D
OFF
1MC
1Ry
ON
1MC
1SUP
1Ry
L2/S
L3/T
DC24N
B1
B2
DU
DV
DW
U(A)
V(B)
W(C)
1
1b
U
V
W
FG
FG
CN1
CN2
DB24
DB0N
1MCCB
R S T
1PL
1MC
ALM -
ALM+
+10
-15
%
DC24V
0V
380 to 480 V
SERVOPACK
SGDH- †† DE
(Alarm lamp)
DB Unit
Fan
Main circuit
power
Thermal
protector
Three-phase
380 to 480 VAC
FIL
: Lamp for display
: Surge suppressor
: Flywheel diode 1PL
1SUP
1D 1MCCB
FIL
1MC
1Ry : Circuit breaker (for inverter type)
: Noise filter
: Contactor
: Relay
Prepared by customer
Control power
supply
+ −