Page 154 - Power Quality in Electrical Systems

136 Chapter Nine

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Symmetra MW 1000 kVA
The world’s largest
modular UPS
Sy1000K1000G + SYMBP1000C1G12 +
(3)SYB400K1000GXR-2C
• 1000 kVA/kW 480 V UPS
• Scalable power capacity reduces UPS
oversizing costs
• Configurable for N + 1 internal redundancy
provides high availabilty
• Modular design for fast service and reduced
maintenance requirements
• LCD display provides schematic overview of
critical data
• Fully rated power kVA equals kW. This reduces
cost by eliminating the need for an oversized
UPS for Power Factor Corrected (PFC) loads
Figure 9.6 Double-conversion UPS, 1000 kVA [9.6].
[Courtesy APC]

Flywheel power system
The VSS+ voltage support
solution (VSS) flywheel power
system provides ride-through
protection for a safe system
shutdown of most process
operations or until a standby
engine-generator can come
online. It also handles short-
duration power disturbances so
UPS batteries can be saved for
longer events. A single VSS+
unit provides up to 25 sec. in a
130 kVA UPS and 40 sec. in a
80 kVA UPS. For large systems,
multiple VSS+ system can be
paralleled together without any
additional communication links.
Pentadyne

Figure 9.7 Flywheel UPS, 130 kVA, 25 s [9.7].
[Courtesy Pentadyne Power Corporation]