Voltage And Frequency Limits - Power One AURORA PVI-OUTD-US Series Installation And Operator's Manual

Installation and Operator's Manual
(PVI-3.0/3.6/4.2-OUTD-x-US Rev: 2.1)
8.6

Voltage and frequency limits

The UL1741 requires, for voltage and frequency, the following limits for utility
interaction:
Condition
A
B
C
D
E
F
a
When a utility frequency other than 60 Hz is used for the test, the
maximum number of cycles it takes to cease to export power to the
simulated utility shall not exceed the number of cycles a utility
frequency of 60 Hz takes regardless of the time the inverter takes to
cease to export power to the simulated utility.
b
V is the nominal output voltage rating.
C
The rate of change in frequency shall be less than 0.5 Hz per second.
Simulated utility source
Voltage (V)
b
< 0.50 V
nor
b
0.50 V ≤ V <
nor
0.88 V
nor
b
1.10 V < V <
nor
1.20V
nor
1.20V ≤ V
nor
Rated
Rated
Frequency (Hz)
before cessation
of current to the
simulated utility
Rated (60 Hz)
Rated (60 Hz)
Rated (60 Hz)
Rated (60 Hz)
c
f > rated + 0.5
c
f < rated –0.7
Page 99 of 108
Maximum time
a
(sec) at 60 Hz
0.16
2
1
0.16
0.16
0.16