5-2 Associated Equipment
AC30 series Variable Speed Inverter
Connect the associated equipment to a DC Fed AC30 in the following order:
A – Semiconductor fuses, rated to protect the dc supply unit and dc bus installation at maximum power.
B – Optional EMC filter.
C – AC line choke, see Note 1.
D – DC supply unit, for example 890CS, AC30 supply unit 380-x. (Refer to separate product manuals).
E – Semiconductor fuses, rated to protect the individual dc fed AC30 and its dc wiring.
NOTES:
1. The required AC line choke inductance value is determined by the total dc bus capacitance (dc bus) as:
Lac(µH) per phase = (1.05 x 10
6
)/C
dcbus
(µF)
The dc supply unit may also have minimum inductance requirements (see table over page) to satisfy (e.g., 3% for 890CS) or may
include an internal line choke (e.g., AC30 input unit 380-x).
2. The dc supply unit may be required to precharge the dc bus at power up. If so, the precharge circuitry should be rated (in terms of
peak power and impulse energy) to charge the total dc bus capacitance, and should be rated to carry 45W to the internal power
supply of each drive, without dropping more than 40V.
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