Powerware Uninterruptible Power Supply SOLA 4000 - Manual (Page 55)

SOLA 4000 - Installation and Initial Start-Up
JUE 401265 55
3.2 Start-Up Procedure for Parallel Systems
Repeat the procedure of section 2 individually for all units in the
system, with the the other units off.
Ensure that the interconnecting BUS cables are connected accord-
ing to section 1.10.1 and FIG 1.10.3.
• Open IRP, IRE, IB and IUG of the last unit checked with the
procedure in section 2.
K • Ensure that no load is connected to the system output.
• Ensure that all IUG switches are open.
• Switch on the IRE switches of all units. Wait until all units give
a flashing "U" indication on the display of the CPHC16-S pcb.
• Close IUG on one unit only.
• At each unit in turn:
Measure across the output switch IUG from input to output of each
phase.
? Is this voltage less than 2V.a.c for all three phases for every unit?
no The output power interconnections are incorrect and must be
reconnected correctly. Switch off all units and the mains supply
and recheck the connections.
Return to K
yes Continue.
• Close the IUG switches on all units. The static bypasses (SSB)
will now be connected in parallel for all units.
• Close IRP of all units.
• When the front operating panel is initialised on all units (after 3
beeps), close the battery switches of the respective units.
• Press the "START" pushbutton on any one unit. The inverter
will start and when synchronised to the bypass supply, transfer
to the system output and all static bypass switches (SSB) will
open.
• Press the "START" pushbutton on each successive unit in the
system, each time checking that the SSI closes on the unit and
that the system operates in parallel operation.
• Commutations to the bypass/inverter supplies may be checked
by pressing the pushbutton on the CPH16 -S pcb and PB3 at
the bottom of the ICP pcb.
• Apply a load to the UPS system and check for correct sharing
of the load currents on each phase. If stand-alone units have
been converted for parallel operation, the current sharing needs
to be checked and is best performed with a load as close as
possible
3 Additional Start-Up Proced. for Multi-Unit Systems