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| DOE-SPEC-3021-97
] [To be provided by battery
c. Battery Float Voltage:
[
manufacturer]
d. Voltage Variation
(battery equalized and
discharged
/
] [To be provided by battery
respectively):
[
manufacturer]
e. Short-Circuit Current
(at nominal voltage):
[
A dc] [To be provided by battery
manufacturer]
3.3.5
Static transfer switch.
ATTENTION:
The transfer conditions should be dictated by the needs of the connected load. Some typical values are: drop-in
input voltage below 90% for 5 ms and 5% frequency deviation for 50 ms.
********************
3.3.5.1
General. The transfer switch shall transfer from the inverter output
to the internal bypass source when any of the following conditions
occur:
a. The inrush load exceeds the inverter capability as listed below in
paragraph 3.3.5.3.
]% of nominal voltage
b. Drop of inverter output voltage below [
for more than [ ] milliseconds.
c. Deviation of inverter output frequency of [
]% of nominal
value for [ ] milliseconds.
d. Inverter output voltage is outside regulating band in excess of
transient response period (paragraph 3.3.2.2).
ATTENTION:
The retransfer is normally selected by an auto/manual control switch, so the fill-in should show that it shall
transfer.
********************
Retransfer. The transfer switch [shall] [shall not] retransfer to the
3.3.5.2
inverter upon restoration of normal conditions; however, it shall
always retransfer after inrush conditions.
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