Parker AC890 Product Manual page 143

Operating the Drive
Pre-Charge Sizing
The external pre-charge contactor is required to carry the full load current rating (including overload) of the
4-Q Regen drive. Thus, it must have an AC1 rating of the Constant Duty current rating of the drive. Refer
to the Electrical Ratings tables for Constant Duty motor powers.
We recommend that standard Parker Dynamic Braking resistors are used for the external pre-charge circuit.
The continuous and peak power capabilities of these resistors are given below:
Parker Part N
CZ389853
CZ463068
CZ388396
The recommended pre-charge resistor networks are shown in the table below. The table indicates the
amount of total DC Link capacitance the network can charge for a given supply voltage.
External Pre-Charge
Network
100 Ohm 100W
6-39
Page
o Resistance
100
Continuous
Power Rating
(W)
100
200
56 Ohm 200W
500
36 Ohm 500W
Continuous Power Rating
()
56
36
Impulse Joule Pre-Charge
Rating (J)
Capability (F) @
240V
2,500
5,000
12,500
Peak Power Rating
(W)
100
200
500
Pre-Charge
Capability (F) @
+10% 460V
rms
35,000
71,000
179,000
890SD (Standalone) Drive: Frame G, H & J
(kW)
2.5
5
12.5
+10%
rms
9,700
19,500
48,800