UPS 40 – 160 kVA, 400V 50/60 Hz output
User’s and Installation Guide
1023294
Revision C
9
A parallel UPS system means the linking together of two or more UPS units in parallel so that in
the unlikely event one fails the other can automatically take up the load. Traditionally a parallel
redundancy configuration is achieved by having a random or fixed master-slave relationship
among the UPS units. This master logic gives out individual commands to all the slaves
units. Unfortunately this can lead to a single-point-of-failure for the whole system because if
the master logic or communication to slaves fails, and causes the whole UPS system to be in
trouble.
The Hot Sync® technology was developed to allow parallel capacity system and to maintain
the highest system availability. An industry leading paralleling technology in its own right,
the patented Hot Sync enables you to set up a parallel redundant system giving you 100%
conditioned power at all times. Its unique digital design eliminates the system level single
point of failure inherent in traditional parallel UPS modules, and exponentially increases the
reliability of the overall system.
Hot Sync allows up to four UPS units to cover the same load in parallel and redundant
configuration. No vulnerable master logic is needed in this patented design. It provides
automatic load sharing and module level redundancy with nothing other than the power
connecting the Hot Sync version of UPS modules.
2.5 Basic system configuration
The following basic UPS system configurations are available:
• A single UPS system:
– UPS cabinet
(40-60-80 kVA, 100-120-160 kVA)
– Battery cabinet or battery rack
(10-120 min back-up time)
– LCD display for easy configuration
(Std.)
– Web/SNMP communication capability (Std./Optional)
Figure 2.
UPS 40-80 kVA configuration with Large battery cabinet.
Adding optional accessories can enhance the UPS system configuration. These include extensive
X-slot communication adapters. As a standard the selected UPS models are delivered with
advanced Web/SNMP communication capability to interface with a network management
system.
