DRV-28 inverter
s Optional peripheral accessories
-328-
Inverter model
Fuse (A
Breaker
(A)
Rated current of the
contactor (A)
AS28DRV4185
1110
630
580
AS28DRV4200
1110
630
580
AS28DRV4220
1230
800
630
AS28DRV4250
1380
800
700
AS28DRV4280
1500
1000
780
AS28DRV4315
1740
1200
900
AS28DRV4350
1860
1280
960
AS28DRV4400
2010
1380
1035
AS28DRV4500
2505
1720
1290
Note:
The accessory specifications described in the preceding table are ideal values. You can select
accessories based on the actual market conditions, but try not to use those with lower values.
D.6 Reactors
When the voltage of the grid is high, the transient large current that flows into the input power circuit
may damage rectifier components. You need to configure an AC reactor on the input side, which can
also improve the current adjustment coefficient on the input side.
When the distance between the inverter and motor is longer than 50 m, the parasitic capacitance
between the long cable and ground may cause large leakage current, and overcurrent protection of
the inverter may be frequently triggered. To prevent this from happening and avoid damage to the
motor insulator, compensation must be made by adding an output reactor. When an inverter is used
to drive multiple motors, take the total length of the motor cables (that is, sum of the lengths of the
motor cables) into account. When the total length is longer than 50 m, an output reactor must be
added on the output side of the inverter. If the distance between the inverter and motor is 50 m to 100
m, select the reactor according to the following table. If the distance is longer than 100 m, contact
ASTOR's technical support technicians.
DC reactors can be directly connected to inverters of 400V, 132 kW or higher. DC reactors can
improve the power factor, avoid damage to bridge rectifiers caused due to large input current of the
inverter when large-capacity transformers are connected, and also avoid damage to the rectification
circuit caused due to harmonics generated by grid voltage transients or phase-control loads.