**************************************************************************
On engine-generator set tests where the engine and generator are required
to be connected and operated together, the load power factor shall be [the
power factor specified in the engine generator set parameter schedule]
[[_____] power factor]. For engine-generator set with dual-fuel operating
capability the following tests shall be performed using [the primary fuel
type] [[_____] type fuel]. Electrical measurements shall be performed in
accordance with IEEE Std 120. Definitions of terms are in accordance with
IEEE Std 100. Temperature limits in the rating of electrical equipment and
for the evaluation of electrical insulation shall be in accordance with
IEEE Std 1. In the following tests where measurements are to be recorded
after stabilization of an engine-generator set parameter (voltage,
frequency, current, temperature, etc.), stabilization is considered to have
occurred when measurements are maintained within the specified bandwidths
or tolerances, for a minimum of four consecutive readings. Tests
specifically for the generator may be performed utilizing any prime mover.
a.
Insulation Resistance for Stator and Exciter Test, IEEE Std 115
and IEEE Std 43, to the performance criteria in NEMA MG 1, Part
22. Generator manufacturer's production line test is acceptable.
b.
High Potential Test, per IEEE Std 115 and NEMA MG 1, test voltage
in accordance with NEMA MG 1. Generator manufacturer's production
line test is acceptable.
c.
Winding Resistance Test, Stator and Exciter, per IEEE Std 115.
Generator manufacturer's production line test is acceptable.
d.
Overspeed Vibration Test, per IEEE Std 115 to the performance
criteria in NEMA MG 1. The test shall be performed at 110% of
rated speed for 5 minutes. The vibration shall be measured at the
end bearings (front and back of engine, outboard end of generator)
in the horizontal, vertical, and axial directions. Vibration
amplitude and speed shall be recorded at one minute intervals.
e.
Phase Balance Voltage Test, to the performance criteria specified
in paragraph GENERATOR. This test can be performed with any prime
mover. Generator manufacturer's production line test results are
acceptable.
(1)
Start and operate the generator at no load.
(2) Adjust a regulated phase voltage (line-to-neutral) to rated
voltage.
(3) Read and record the generator frequency, line-to-neutral
voltages, and the line-to-line voltages.
(4) Apply 75% rated load and record the generator frequency,
line-to-neutral voltages, and the line-to-line voltages.
(5) Apply rated load and record the generator frequency,
line-to-neutral voltages, and the line-to-line voltages.
(6) Calculate average line-neutral voltage and percent deviation
of individual line-neutral voltages from average for each load
condition.
SECTION 16263A
Page 69
Previous Page
