Setting the power strategy
The UPS has the following three settings for power strategy:
v Normal. The UPS operates in Normal mode (powering the load from utility
power).
v High Efficiency. The UPS operates in High Efficiency mode (powering the load
from the bypass source but ready to transfer to Normal mode as needed). The
UPS is highly sensitive to line fluctuations and transfers out of High Efficiency
mode at ±5% of nominal voltage or ±1% of nominal frequency. If the UPS
transfers to Normal mode, the UPS automatically transfers back to High
Efficiency mode after 5 minutes of stable power. Transfers to High Efficiency
mode are limited to three times in 1 hour.
v Converter. The UPS operates as a frequency converter, powering the load from
acceptable utility power while providing a stable output frequency. Bypass
operation and bypass-related alarms are disabled.
The following table describes the UPS behavior in Converter mode in detail. To set
the output frequency, see “Configuration” on page 32.
Table 9. UPS behavior in Converter mode
Load
Output
frequency
setting
Input frequency
(Hz)
Output frequency
(Hz) UPS behavior
≤50% 50 Hz 47 - 53 47 - 53 UPS in Converter mode synchronizes the
output frequency with the input frequency.
45 - 46 or 54 - 65 50 UPS in Converter mode converts the input
frequency to 50 Hz output frequency.
<45 or >65 50 UPS transfers to Battery mode to provide
50 Hz output frequency.
60 Hz 57 - 63 57-63 UPS in Converter mode synchronizes the
output frequency with the input frequency.
45 - 56 or 64 - 65 60 UPS in Converter mode converts the input
frequency to 60 Hz output frequency.
<45 or >65 60 UPS transfers to Battery mode to provide
60 Hz output frequency.
>50% 50 Hz 47 - 53 47 - 53 UPS in Converter mode synchronizes the
output frequency with the input frequency.
45 - 46 or 54 - 55 50 UPS in Converter mode converts the input
frequency to 50 Hz output frequency.
<45 or >55 50 UPS transfers to Battery mode to provide
50 Hz output frequency.
60 Hz 57 - 63 57 - 63 UPS in Converter mode synchronizes the
output frequency with the input frequency.
55 - 56 or 64 - 65 60 UPS in Converter mode converts the input
frequency to 60 Hz output frequency.
<55 or >65 60 UPS transfers to Battery mode to provide
60 Hz output frequency.
36 11000 VA UPS and 11000 VA EBM: Installation and Maintenance Guide
To Next Page
Loading...
Need help?
General
