sequence of operation.
b.
Restore the primary power source and verify sequence of operation.
c.
Verify resetting of controls to normal.
3.5.11
Fuel Consumption Tests
**************************************************************************
NOTE: Fuel consumption tests and rebates are to be
used on prime rated applications only. Delete for
standby units.
**************************************************************************
Fuel consumption tests to confirm the manufacturer's certified rates shall
be performed on engine generator set and the results tabulated and
averaged. Fuel consumption tests shall be conducted under the direct
supervision of the engine manufacturer's representative. Fuel consumption
readings shall be taken at 15 minute intervals, over a minimum period of 1
hour at 50% Service Load, 1 hour at 75% Service Load, and 4 hours at 100%
Service Load. Fuel consumption data may be taken during the 75% load test
and 100% load tests. Fuel consumption readings at site conditions shall be
correlated to the guarantee-baseline conditions. Test report shall
contain: readings of the output frequency, voltage, current, power factor,
and power; barometric pressure; ambient temperature; intake-air
temperature; fuel temperature; the site fuel consumption readings,
adjustment calculations, factors, and source references for correlation of
actual consumption rate of the guaranteed rate.
a.
Start and operate the generator set and allow it to stabilize at
rated load, rated voltage and rated frequency. During this
period, readings of all instruments including thermal
instrumentation shall be recorded at minimum intervals of 10
minutes. If necessary, adjustments to the load, voltage and
frequency may be made to maintain rated load at rated voltage and
rated frequency. However, adjustments to the voltage and
frequency shall be limited to those adjustments available to the
operator, specifically adjustments to the voltage or frequency
adjust devices. On generator sets utilizing a droop-type speed
control system as the prime speed control, the speed and droop
portions of the control may be adjusted. No other adjustments to
the voltage and frequency control systems shall be made unless
permitted by the procurement document. Adjustments to the load,
voltage or frequency controls shall be recorded on the data sheet.
Unless otherwise specified in the procurement document,
stabilization will be consideration to have occurred when four
consecutive voltage and current recorded readings of the generator
(or exciter) field either remain unchanged or have only minor
variations about an equilibrium condition with no evident
continued increase or decrease in value after the last adjustment
to the load, voltage or frequency has been made.
b.
Perform one of the following procedures:
BALANCE SCALE PROCEDURE.
(1.) Supply fuel from auxiliary container mounted on a balance
scale.
SECTION 16263A
Page 87
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