ESA shall be visually monitored during the test and after the pulse
inspected for charring, cracks, or other signs of degradation or damage.
Test shall be on a prototype only. The dc breakdown voltage test shall be
repeated.
2.7.1.6
Minimum Operating Life
**************************************************************************
NOTE: Surge life test will be performed only when
required by the user. Coordinate current amplitude
with manufacturer.
**************************************************************************
The ESA operating life tests shall be performed with the ESA mounted in the
filter/ESA assembly enclosure or mounted on a metal plate by the same
holding method which will be used for mounting in the enclosure. A pulse
generator shall be connected between the ESA terminal and the enclosure (or
plate) with a minimum inductance connection. The pulse generator shall be
capable of supplying repetitive 4 kA current pulses, with a 50 ns x 500 ns
waveshape, to the ESA. A series of ten pulses is required. Current
through the ESA and voltage across the ESA shall be monitored on
oscilloscopes or transient digitizing recorders. The ESA shall be visually
monitored during the series of pulses for indications of external
breakdown. The ESA shall be able to conduct 2,000 pulses at a peak current
of 4 kA and 50 nanoseconds x 500 nanoseconds waveform. Post-test shall
include inspection for charring, cracks, or signs of degradation. The dc
breakdown voltage test shall be repeated.
2.7.1.7
Operating Temperature
The ESA shall be rated for continuous operation in ambient temperatures
from minus 25 to plus 125 degrees C minus 12 to plus 255 degrees F.
2.7.2
ESA Testing
ESA factory test data shall be submitted which shall show the ability to
meet the requirements herein, based on prior tests of the same ESA assembly
components and design. Testing shall be performed with the ESA mounted in
the filter/ESA assembly enclosure or mounted on a metal plate by the same
holding method which will be used for mounting in the enclosure. The pulse
generator shall be connected between the ESA terminal and the enclosure (or
plate) with a minimum inductance connection. Current through the ESA and
voltage across the ESA shall be monitored on oscilloscopes or transient
digitizing recorders. Test data shall include the following:
a.
Breakdown Voltage.
b.
Impulse Sparkover Voltage.
c.
Clamping Voltage.
d.
Extinguishing.
e.
Extreme Duty Discharge.
f.
Surge Life.
SECTION 13095A
Page 41
Previous Page
