Kikusui PAD-L III Series, Руководство по эксплуатации

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4-22 Applied Operation PAD-L
4.5 Master-slave-control parallel operation
It is possible to increase the current capacity by connecting a maximum two slave
units in parallel to one master unit. In a master-slave-control parallel operation
system, the output preset for all the units connected in parallel can be provided only
on the master unit.
CAUTION
• Parallel connection is possible only for the PAD-L series power
supplies that have the same rated output voltage and rated output
current. Connecting power supplies of different rated outputs in
parallel may cause malfunction.
• The number of slave units to be connected to the master unit is up
to 2. To connect three or more slaves, contact Kikusui distributor/
agent.
Presetting of OVP trip points in parallel operation
There is a link between the master unit and slave units on OVP operation in parallel
operation. Preset OVP trip points as follows.
When carrying out parallel operation, OVP (overvoltage protection) trip points
should be preset for both the master unit and for all slave units. For example, if the
master unit becomes unable to control the slave units – because, for example, its
POWER switch is inadvertently turned off during parallel operation – the slave units
may output their maximum output voltage. If an appropriate OVP trip point has been
preset for these units, however, the load can still be protected.
In parallel operation, the OVP trip points for slave units should be set to slightly
higher values than that used for the master unit. However, do not preset them to a
value exceeding the maximum voltage (see Chapter 6, Table 6-1.)
If the OVP trip points for the slave units are preset to a value below that of the master
unit, their overvoltage protection will function first, turning off output from the
slaves but not from the master unit.