 |
|||
|
|
|||
| ||||||||||
|
|  MIL-I-19028E(OS)
3.3.1.9 Operating life. The inverter shall have a useful operating
life of at least 200 hours without maintenance, except as specified in
3.3.1.3.2, in addition to the operating hours encountered during testing
to this specification.
3.3.1.10 Over-voltage. The inverter shall be capable of withstanding
an input over-voltage stress of 35 volts dc for 30 plus or minus 5 seconds.
3.3.1.11 Transient voltage. At no time when the inverter is operated
in accordance with this specification shall the inverter generate a tran-
sient voltage, measured as near the inverter terminals as possible, that
exceeds 35 volts peak.
3.3.1.12 Vibration. The amplitude of vibration, when measured approx-
imately at the area of the 2-7/8 maximum center line and the 12.000 basic
dimension locating the mounting holes on the mounting plate, as shown on
Dwg 1263725, shall not exceed 0.0005 inch peak-to-peak when the inverter
is operating in accordance with 3.3.1.2.2.3.
3.3.2 Product characteristics
3.3.2.1 Voltage setting. The voltage setting shall be capable of
adjusting the output voltage plus or minus 5 percent or more, in incre-
ments no greater than 1 percent of the nominal value.
3.3.2.1.1 Method. The voltage setting shall be externally accessible
from the plug end of the inverter control box, and shall be operable
either manually or by means of a straight screwdriver. The setting shall
be so designed that it will not be displaced by vibration or shock under
the conditions specified in 3.4.
3.3.2.2 Frequency setting. The frequency setting shall be capable of
adjusting the output frequency plus or minus 2.5 percent or more, in
increments no greater than 1 percent of the nominal value. Adjustment
will be required if the frequency drifts more than 2 percent during 200
hours of useful inverter life.
3.3.2.2.1 Method. The frequency setting shall be externally accessible
and shall be operable either manually or by means of a straight screwdriver.
The frequency setting shall be designed so as not to be displaced by vi-
bration or shock under conditions specified in 3.4.
3.3.2.3 Voltage sensing. The voltage regulator shall sense at-least
the AB phase of the inverter output as defined in 3.3.2.4.3.
3.3.2.4 Internal connections
3.3.2.4.1 Commons. There shall be no electrical connections made between
the dc and ac circuits within the inverter.
9
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals