Kikusui PAD-L III Series, Руководство по эксплуатации

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PAD-L Applied Operation 4-27
Connecting and setting procedure for series operation
1. Determine the master unit.
When the same TYPE models of the PAD-L series with different output
capacities are connected, the output is limited by the power supply with the
smallest rated output current. Thus, that unit should be used as the master unit.
2. Check that no load is connected between the output terminals of the
master and slave units.
3. Set the OVP (overvoltage protection) trip points for the master and slave
units.
Set the OVP trip points for the slave units to a value slightly higher than that
used for the master unit.
4. While pressing the CURRENT/VOLT. LIMIT switch of the master unit,
set the output voltage and current.
5. Turn off all POWER switches of the master and slave units.
6. Turn the VOLTAGE control and the CURRENT control of each slave unit
fully clockwise.
Set the output of each slave unit to the maximum level, so that it can follow the
output setting of the master unit.
7. Connect the master and slave units and a load, as shown in Fig. 4-17.
WARNING
• To avoid electric shock, isolate the external resistor from other
parts. The external resistance has almost the same potential as
the + (pos.) output terminal of each output.
• Connect any one of the output terminals to the GND (chassis
ground) terminal using a shorting bar. The chassis of the master
and slave units have the same potential as the output terminals to
be connected. Take care to avoid electric shocks.
CAUTION
• Pay close attention to the current capacity and withstand voltage
of cables to be used for the load cables. For more information,
see 3.3.1 "Load cables".
• To assure good connection, use crimped terminals.
• For external resistors, use a 1 W or larger resistor with a good
temperature coefficient and small aging effect such as metal film
or wire-wound type resistor.
• Position each unit with sufficient space around it.
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NOTE
• When performing remote sensing in master-slave-control series operations, do
the sensing wiring for the + (pos.) output terminal of the master unit and the -
(neg.) output terminal of the slave unit at the end. For information on
connecting wires for remote sensing, see 4.1 "Remote sensing".
• When using two power supplies as dual-tracking power supplies, it is recommended
that either the - (neg.) output terminal of the master unit or the + (pos.) output
terminal of the slave unit be connected to the GND (chassis ground) terminal.
• Select the shortest and heaviest-gauge wires for output wiring used to connect
the power supplies. A large voltage drop in the wires will result in large
potential differences or load variations between the power supplies.
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