GE Digital Energy 1018959 Operating Manual page 32

3.4 IEMI / EBOOST SECTION (3-PH VERSION ONY)
High-efficiency operation is available as an option on some 3-ph UPS. Particularly, two operating modes
may be available:
•
IEMi (Intelligent Energy Management integrated), available on parallel systems. The UPS control
logic implements an efficiency optimization algorithm that dynamically controls the number of
on-line UPS to maximize system efficiency;
•
eBoost, available on both single units and parallel systems. The UPS feeds the critical load via the
static bypass path (as long as the utility remains within given tolerances), thereby reducing
losses and improving efficiency.
When the UPS system includes one of these high-efficiency options, an additional section is available on
the top navigation bar.
NOTE: Both IEMi and eBoost options are available ONLY if enabled at the factory or by a GE Service
Engineer.
3.4.1 Operation page
This page lists the UPS operating conditions with reference to high-efficiency operation. The feature
status can be mapped to three conditions:
•
Active: the UPS system is operating in high-efficiency mode
•
Enabled/Inactive: the high-efficiency mode is enabled but currently inactive following scheduled
activation and/or user control
•
Disabled: high-efficiency mode is disabled
Additionally, the system load, the status of each module in the system and its operating times are also
shown.
3.4.2 Configuration page
Both IEMi and eBoost can be configured for scheduled activation. Particularly, the user may define time
intervals when the system will operate in high-efficiency mode for weekdays (Saturday to Friday). These
intervals are defined by:
•
Start Time: The hour of the day after which high-efficiency operation is enabled.
High-efficiency operation is enabled until the following Stop Time is reached (the Stop Time of
the same day if this is later than the Start Time, the Stop Time of the following day otherwise).
•
Stop Time: The hour of the day before which the high-efficiency operation is enabled.
High-efficiency operation is enabled starting from the preceding Start Time (the Start Time of the
same day if this is earlier than the Stop Time, the Start Time of the previous day otherwise).
Both Start Time and Stop Time are specified in 24-hour format.
In order to check the correct operation of the inverter feed path on all modules, at least 1 minute of
normal operation must be programmed during the week. The system will reject/disable the
configuration if this condition is not satisfied.
Please refer to the UPS User Manual for additional details and examples of configuration.
NOTE: the configuration of the activation schedule can only be updated when high-efficiency operation
is disabled.
Once the configuration has been updated, it can be downloaded to the UPS system. This operation will
also enable high-efficiency operation. In case of Parallel System, the configuration will be propagated to
all modules in the system.
Modifications reserved
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