
2301D/2301D-EC Digital Control
Manual 26247
68
Woodward
4. If the Load Signal Out Reading is within 10% of the above calculation, the
PT/CT phasing is correct. If the phasing is incorrect, proceed to the Phase
Correction Procedure. If the phasing appears correct, skip the Phase
Correction Procedure and go to the Load Calibration Adjustment procedure.
If after completing the LOAD SENSOR CALIBRATION and DROOP
adjustments, the control loading is extremely sensitive to changes in
the power factor when operating in parallel, complete the phase
correction procedure.
The most accurate calibration is made at full load. However, if it is
not possible to run the generator set at full load, run it at less than
full load, and reduce the voltage reading given in this calibration
procedure proportionally. For example: run a 200 kW generator set at
100 kW and divide all voltages given in this calibration procedure by
2. If you reduce the load in this manner, be sure to reduce it by the
same amount throughout the calibration procedure.
Phase Correction Procedure
This procedure requires a minimum power factor of (.9). If a .9 power
factor cannot be obtained, tracing through the wiring is the only
means of correcting the current transformer phasing.
The highest positive reading of kW or Load Signal Out will be obtained when the
CTs are correctly matched to the load sensor terminals in both phase and
polarity. The following procedure will assure the correct connection of the current
transformers. It is required only if the phasing check indicates incorrect phasing,
or loading stability is extremely sensitive to the power factor.
Make trial connections of the first CT to all three load sensor inputs, polarized
both ways (a total of six connections). Record the Load Signal Out reading for
each connection. Connect the first CT to the terminals that produce the highest
positive reading, and with the polarity that produces the highest positive voltage.
The displayed Load Gain reading is limited to about 0.2, therefore a negative
reading indicates a phasing or polarity error.
Try the second CT on each of the remaining two CT input terminals, in each
polarity, and record the Load Signal Out reading. Connect the second CT to the
terminals that produce (and with the polarity that produces) the highest positive
reading.
Try the last CT on the remaining input terminals, polarized both ways, and record
the voltage. Connect the last CT in the polarity that produces the highest Load
Signal Out reading.
Содержание 2301D
Страница 12: ...2301D 2301D EC Digital Control Manual 26247 4 Woodward Figure 1 1a 2301D Outline Drawing Ordinary Locations ...
Страница 13: ...Manual 26247 2301D 2301D EC Digital Control Woodward 5 Figure 1 1b 2301D Outline Drawing Hazardous Locations ...
Страница 14: ...2301D 2301D EC Digital Control Manual 26247 6 Woodward Figure 1 2a 2301D Plant Wiring Diagram sheet 1 ...
Страница 16: ...2301D 2301D EC Digital Control Manual 26247 8 Woodward Figure 1 2c 2301D Plant Wiring Diagram notes ...
Страница 51: ...Manual 26247 2301D 2301D EC Digital Control Woodward 43 Figure 3 4 Typical Transient Response Curves ...
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Страница 129: ...Declarations ...