DynaGen Tough TG350AMF, Руководство пользователя

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Configuration 38
© 2012 DynaGen Technologies Inc. TOUGH Series User Manual
4.5 AC Monitoring
The controller is equipped with the ability to monitor and display generator voltage. For information on
configuring the controller to monitor mains voltage, refer to
AMF / ATS .
PARAMETER DESCRIPTION
Voltage Source
The wiring configuration of the generator. Selecting 'Auto Selection' will
use the
Voltage Select switched inputs for which wiring
configuration is implemented and displayed.
Scaling Factor
Multiplier at which the voltage is read into the controller. See below for
more information.
Nominal Voltage Nominal voltage of the generator under normal operating conditions.
Voltage Select Inputs
Nominal voltages that can be selected by use of Voltage Select
input. Used with mobile gensets to select the voltage configuration to
be displayed on screen.
Voltage Setpoints Warning and failure set points for generator AC voltage.
Frequency Setpoints Warning and failure set points for generator AC frequency.
AC Voltage Calibration
The Scaling Factor setting can be used to calibrate the AC voltage if there is discrepancies between the
reading and the actual value. It can also be used if potential transformers are used to step down the
voltage. This setting differs from the 'Trim Offset' in
Sensors in that it multiplies by the scaling ratio
instead of adding / subtracting.
Example: The voltage source is a 3-Wire 3-Phase system with a nominal voltage of 208V. The controller
is reading 206.3V but a calibrated multimeter gives 208.3V so the Scaling Factor must be set to
compensate. There are two ways to do this.
1. Trial and Error - Keep adjusting the scaling factor until it gives you a correct reading.
2. Calculate - Use the following equation to determine the scaling factor:
Scaling Factor = Multimeter Reading / Controller Reading
Scaling Factor = 208.4V / 206.3V
Scaling Factor = 1.010
NOTE : Scaling Factor applies to all phases in the system.
Step-Up / Down Transformers
The Scaling Factor setting can also be used to scale up or down readings if they are fed into a
transformer before being read by the controller.
Example: Voltages about 575VAC are being monitored using the controller and there are 2:1 step down
transformers between the generator and the controller. A sensing ratio of 2.00 is required to scale the
voltage back up to the appropriate value.
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