Generac Power Systems Power Zone PZCONSVR Owner's Manual page 26

Installation and Operation
Load Accept Volts, 85% - 95%
Voltage of target voltage
Load Accept Hz, 85% - 95% of
Frequency target frequency
Warm Up Time Seconds, 0 - 1200
Cool Down Seconds, 0 - 1200
Time
Calibrations (Voltage and Current)
See 3-43. The Calibration screen is used to
Figure
calibrate the hardware in the controller that measures AC
voltages and currents. They are calibrated in the factory
but may require fine tuning at site.
Figure 3-43. Calibrations
There are three general buttons:
The Reset All button resets all calibration values to
•
one (no calibration).
The Restore button sets all calibration values back
•
to the settings saved when this screen was
opened.
The Util-Gen Volts button will automatically cali-
•
brate the utility voltage readings to be the same as
the generator voltage readings in a Utility monitor-
ing system. The generator voltages must first be
calibrated. The utility voltages can still be manually
calibrated if desired.
Each of the channels can be manually calibrated with the
aid of a CALIBRATED true RMS voltage meter or current
clamp meter. Choose which channel to calibrate from the
eight options. For example, if calibrating the Generator
Line to Line (L-L) voltage, see
procedure below.
Select "Generator L-L" (A).
1.
Start in the A-B voltage column (B). The Power
2.
Zone A-B voltage reading is dynamically displayed
on the screen.
22
Table 1 - AMF Parameters
The minimum voltage the generator must provide before switching the load
to generator.
The minimum frequency the generator must provide before switching the
load to generator.
Amount of time after the generator reaches load accept voltage and
frequency before switching the load to generator.
Amount of time to run the generator after the load has been disconnected.
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and follow the
Figure 3-44
Use the meter (C) to read the A-B voltage
3.
manually.
Enter the meter reading onto the screen (resolution
4.
of 0.1 volts).
Click "Calibrate" (D). Calculations will be performed
5.
and a new calibration stored for that channel.
Repeat for readings B-C and C-A.
6.
The same procedure can be used for all other channels,
however for the Amp readings, a calibrated clamp meter
is required.
NOTE: As the calibrations change for the voltages, the
voltage on the meter will change due to the AVR targeting
the new voltage.
NOTE: It is best to calibrate voltages at no load and
currents a full load or the site expected full load.
NOTE: It is not normal for the meter reading to be more
than 20% from the generator reading. If this occurs, verify
all other related settings and parts are proper such as CT
ratios.
A
B
D
Figure 3-44. Calibration Example
Owner's Manual for Power Zone Connectivity Server
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