YASKAWA SGM Series User Manual page 87

J Connecting a Regenerative Resistor Unit
The connections of the regenerative resistor unit are shown below.
Three-phase AC
200 to 230 V
Figure 5.3 Regenerative Resistor Unit Connection Diagram
J Applicable Regenerative Resistor Units
SERVOPACK Model
SGDB-60AN
SGDB-75AN
SGDB-1AAN
SGDB-1EAN
Regenerative Units will heat up to a high temperature depending on the Regeneration Operation
Mode conditions of the servo system. It is therefore important to cool the unit, use heat-resistant,
inflammable wire, and ensure that wiring does not come in contact with the unit.
The following are resistor specifications for the regenerative resistor units.
JUSP-RA04: 25 Ω (220 W) × 4 connected in parallel
JUSP-RA04: 25 Ω (220 W) × 8 connected in parallel
The temperature of the regenerative resistor reaches about 90°C when used at the rated resistor
loss of 20%. Allowable Servomotor regeneration power (average) at this time is 180 W for the
JUSP-RA04 and 350 W for the JUSP-RA05. Review servo system operating conditions and
check whether the resistor is appropriate for the regenerative resistor unit because another resis-
tor with a large rated allowable loss (W) must be selected if the regeneration power (average)
exceeds these values in Regeneration Operation of the servo system.
SGDB-jjAN SERVOPACK
+24V
3
4
Regenerative Resistor Unit
Applicable Regenerative
Resistor Unit
JUSP-RA04
JUSP RA05 JUSP-RA05
5 -11
5.6 Precautions
Servo
alarm
Regenerative Resistor (Ω)
6.25
3.13 3.13
5