Wayne Kerr AP10030, User & Service Manual

Page: 26 / 70

26 Wayne Kerr AP 1kW Power Supplies • Issue 2
Connections for auto-parallel operation
Fig. 6.7 Connections for auto-parallel operation
To connect in auto-parallel mode proceed as follows:
a) The link joining terminals 10 and 11 to be removed on all slave units.
b) The links joining terminals 3, 4 and 5 to be removed on all slave units.
c) Terminal 10 to be linked together between all units.
d) Terminal 2 of master to be linked to terminal 3 of all slaves.
e) Load leads should be run separately from each power supply to the load.
Setting The Voltage And Current Controls
The parallel combination behaves as if it were a single constant voltage/constant current
supply controlled by the master. The current controls of the slaves are inoperative. The
voltage limits of the slaves should be set above the highest output voltage that is
required. This ensures that all the slaves work in the CI mode.
Overvoltage Protection
The overvoltage protection level is set by the master supply. Overvoltage trip levels on
the slave units should be adjusted to their maximum level.
If the master unit trips, all the slave units will programme down to minimum output
voltage. The individual trips on the slave units can also be set if required. In this case,
only the unit on which the trip is operated would shut down.
Remote Sensing
Remote sensing leads should be connected to the master supply at terminal 10 (negative
sense) and terminal 12 (positive sense) as described in section 6.4.2. The connections
between the power supplies must remain intact (see
Fig. 6.8 ).