T&R PCU2 mk5, Operating And Maintenance Manual, Page: 15 / 30

15
2 OPERATION
This chapter describes how to use the PCU2 and loading unit in a variety of applications.
Specific examples are given in the applications section. The interconnections between the
control unit and loading unit are shown in figure 2.2.
2.1 Loading Unit Configuration
The loading units have two output windings which may either be connected in parallel or
series, allowing the output to be configured for a higher current with a lower voltage or a lower
current with a higher voltage.
The links on the control unit must be connected to select series or parallel operation:
Configuration
Link
terminals
Series
2-3
6-7
Parallel
1-3
2-4
5-7
6-8
Figure 2.1 Loading unit series/parallel selection
To change the links, first remove all eight retaining nuts, and then remove the output terminal
plates. Re
—configure the links as required, and then replace the output terminal plates and
nuts. Ensure that all of the nuts are tightened.
The switch on the control unit must also be set to “series” or “parallel” to set the ammeter to
the correct range.