25-75 kW
User's and Installation Guide
19
2.5.2 Field Installed UPM
A Field online Installed UPM (hot-swappable UPM) can be installed in the cabinet any time in the future
when power needs change. This enables the UPS system to grow with the business, thus lowering the initial
investment required for the system Day1.
In order to install an hot-swappable UPM, the UPS cabinet needs to have upgradeability, which is determined
by the power rating of the static bypass. For listing of upgradeable configurations, see Table 2-1: UPS
configurations.
2.5.3 Parallel Tie Cabinet (PTC)
Parallel Tie Cabinet (PTC) support up to 4 UPSs flexible and line-up-and-match paralleling installation to
provide a parallel and/or redundant capacity based on customer needs. In parallel system, when one UPS
is taken out of service for maintenance or is not operating properly, the other redundant UPS continues to
supply uninterrupted power to the critical load. A Controller Area Network (CAN) communication provides
connectivity for system metering monitor and operational mode control.
2.5.4 External Battery Cabinet (EBC)
Battery backup protection is provided by equipping the UPS system with multi external Battery Cabinets
(EBC) containing Valve Regulated Lead Acid Battery (VRLA) batteries. The EBC is enclosed in its own separate
cabinet, can be installed line-up-and-match with UPS cabinet.
2.5.5
Precise Power-distribution Module (PPM)
Precise Power-distribution Module is enclosed in its own separate cabinet, covers 20 - 300 kVA power
rating. PPM inputs are 380/400/415 Vac 3 phases. The output has default 84 branches and max 168 branches
(2 cabinet in paralleled). PPM can satisfy large power rate and multi output branches power distribution
requirements. PPM monitors system various power parameters from main inputs to each output branch
such as voltage, current, power, power factor, harmonics etc. by monitor module. All monitoring parameters
are displayed on the colorful LCD touchscreen, and also can be displayed by the host-computer software,
it is very easy for user operation. PPM has many itself based accessories as optional, including isolated
transformer, EPO function, ATS, hot swappable breaker and surge module.
2.5.6
Eaton Sync Control
The Eaton Sync Control maintains critical load synchronization of either two separate single Eaton UPS
systems or two separate single Eaton UPS systems. Synchronization of the UPS systems facilitates the
uninterrupted transfer of customer loads from one load bus to another by means of downstream, dual
source, solid state transfer switches. Enable the automatic synchronization action of the Eaton Sync Control
by pressing the Load Sync Enable pushbutton on the front of the panel. When enabled, the Load Sync Enable
pushbutton illuminates.
The Eaton Sync Control panel provides a three phase synchronization reference to each system. Each system
uses this reference to regulate the inverter phase relationship so that the two system outputs can maintain
synchronization with each other. To establish the three phase synchronization reference, each system
provides bypass sensing voltage and output (critical load) bus voltage to the Eaton Sync Control box.
For details, see Chapter 4.5.4.
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