i.
Load power factor operating range:
1.0 to 0.8 lagging.
j.
Phase displacement:
(1)
Balanced load:
Plus or minus 1 degree of bypass input.
(2) 50 percent load imbalance phase-to-phase:
Plus or minus 3
degrees of bypass input.
k.
Wave-form deviation factor:
5 percent at no load.
l.
Overload capability (at full voltage) (excluding battery):
(1)
125 percent load for 10 minutes.
(2)
150 percent load for 30 seconds.
(3) 300 percent load for one cycle after which it shall be
current limited to 150 percent until fault is cleared or UPS goes
to bypass.
m.
Load sharing of parallel modules:
Plus or minus 5 percent of
average load per module.
2.3.8
Transient Response
2.3.8.1
Voltage Transients
a.
50 percent load step/0 percent to 50 percent load:
Plus or minus
8 percent.
b.
50 percent load step/50 percent to 100 percent load:
Plus or
minus 8 percent.
c.
Loss or return of ac input:
Plus or minus 1 percent.
d.
Loss or return of redundant module:
(1)
Manually:
Plus or minus 8 percent.
(2)
Automatically:
Plus or minus 8 percent.
e.
Automatic transfer of load from UPS to bypass:
Plus or minus 4
percent.
f.
Manual retransfer of load from bypass to UPS:
Plus or minus 4
percent.
g.
Response time: Recovery to 99 percent steady-state condition
within 50 milliseconds after any of the above transients.
2.3.8.2
a.
Transients:
Plus or minus 0.5 Hz maximum.
b.
Slew Rate:
1.0 Hz maximum per second.
SECTION 16265A
Page 19
Previous Page
