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6.2.6.1 Redundant Parallel Configuration
In a redundant parallel system a UPS-module may easily be isolated from the parallel system by
opening the respective isolator (IA2). It is now possible to operate or shut down this unit without
influencing the rest of the parallel system. The rest of the parallel system will continue to protect
the load. The isolated UPS-Module may be replaced without the need of transferring the load to
bypass by means of the Maintenance Bypass (IA1).
6.2.6.2 Capacity Parallel Configuration
In the event of a fault in one of the UPS-Modules in a capacity parallel system the load will
automatically be transferred to static bypass (mains). In order to replace the faulty module the
load must be transferred to mains
by means of Maintenance Bypass (IA1).
6.2.7 ECO-MODE (BYPASS MODE) in Parallel Systems
The Eco-Mode function in a Parallel System is the same as in Single Systems. If in a
PMC
Parallel System the load is supplied by the mains(load on mains) and in the event of mains
failure,
all UPS’s will automatically transfer the load back to the inverters with 5msec.
In order to provide the load with maximum protection RITTAL always
recommends that the load be supplied by the inverter (ON-LINE-Mode).
6.3 COMMISSIONING OF MULTI-CABINET CONFIGURATION
ALL THE OPERATIONS IN THIS SECTION MUST BE PERFORMED BY
AUTHORISED ELECTRICIANS OR BY QUALIFIED INTERNAL TRAINED
PERSONNEL.
BY OPENING OR REMOVING THE UPS-MODULES AND MODULE COVERS YOU
RUN RISK OF EXPOSURE TO DANGEROUS VOLTAGES!
BEFORE REMOVING A UPS-MODULE MAKE SURE THE INTERNAL DC-
CAPACITORS HAVE BEEN DISCHARGED FOR AT LEAST 2 MINUTES.
DO NOT EVER LEAVE THE UPS-MODULE COMPARTMENT WITHOUT AN
APPROPRIATE PROTECTION COVER.
RITTAL WILL NOT TAKE RESPONSIBILITY OR BE LIABLE FOR PERSONNEL
INJURIES OR MATERIAL DAMAGES CAUSED BY IMPROPER MANIPULATION OF
THE UPS, OR BY INCORRECT CABLING. THE PROPER INSTALLATION AND
USAGE INSTRUCTIONS OF THE UPS ARE DESCRIBED WITHIN THIS MANUAL
AND MUST BE STRICTLY ADHERED TO.
6.3.1 Start-up of a Multi-Cabinet Configuration
Before starting up a Multi-Cabinet Configuration verify that:
1. All the input and output cabling has been performed correctly according to Chapter 3
of this User Manual;
2. The parallel communication cables have been connected correctly according to
Paragraph 6.2.2 of Chapter 6;
3. All the DIP Switches for the Modules and PMC Extended Twin-Cabinets been
set
correctly according to Paragraph 6.2.3 of Chapter 6;
4. All the external battery cabinets/racks have been connected correctly;
The start-up of a Multi-Cabinet Configuration may be performed in analogy to the start-up
procedures for a single PMC Twin-Cabinet described in Paragraph 4.5 of Chapter 4.
6.3.2 Shutdown of Multi-Cabinet Configuration
Before shutting-down of a Multi-Cabinet Configuration make sure that the loads do need power
protection and that they are disconnected.
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