ABB DCS800, Руководство по установке и запуску

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23
Hardware
3ADW000197R0101 DCS800-R Sel e a
Voltage coding
Use the settings given by the next table. Depending on the line voltage applied to
the existing power stack the jumpers need to be removed accordingly (lower line
voltage scaling on request).
Note:
At existing power parts with high supply voltage the option galvanic isolation
should be taken into consideration because of personal and functional safety rea-
sons.
appr.
200...500 V
500 600 690 800 1000
W1, 6, 12, 17, 22
W2, 7, 13, 18, 23
W3, 8, 14, 19, 24
W4, 9, 15, 20, 25
W5, 11, 16, 21, 26
to the power stack
Voltage applied
Value for
S ConvScaleVolt (97.03)
indicates a removed jumper
501...600 V 601...700 V 701...800 V 801...990 V
Nominal current coding
At first make sure, that the current transformers are mounted and wired according
to the figure before.
In addition to that two other definitions are important:
• the nominal current I
dN
is equivalent to 1.5 V across the nominal current
burden resistors
• the current measurement is designed to handle peak currents up to two-
times of I
dN
Most often the current I
dN
is the thermal current of the existing power part (thyristor
stack); the peak current may be the highest current running through the motor.
•
If the peak current is higher than two-times I
dN
the
nominal current needs to be redefined.
The value
peak dNDCR
I I * 5 . 0
=
has to be used instead of
I
dN
at all the next equations!
•
The scaling for nominal current will be done by the resistors R1 to R21, which
are connected in parallel.