IONPURE
®
DC POWER CONTROLLER
– IP-POWER600-G2
IP-POWER600-G2 MAN REV. 11
Page 18 of 28
Appendix A Design Considerations
A.1
Isolation Transformer
Basic Transformer Design Considerations:
Primary: single or three-phase, selected to match the power available at the site.
Secondary: single-phase, at any voltage from 220 to 660 VAC. The AC voltage required should
be at least 1.1 times higher than the maximum DC voltage required by the CEDI module.
Number of Secondary Windings: a single secondary winding can feed multiple G2 power
controllers, which would normally be the least expensive transformer option. Another possible
configuration is a dedicated secondary winding for each power controller, which can provide the
benefit of preventing failures in one winding from affecting others.
Frequency: 50 or 60 Hz.
Duty Cycle: 100%
The DC power requirements, recommended input voltage to the G2 controller (VAC), minimum
isolation transformer rating (KVA) and fuse size for secondary (amps) for various CEDI single
module systems are listed in Table 3.
A transformer’s rated voltage may not match the system voltage exactly, or
it may be necessary to raise or lower the output voltage to the power
controller. In these cases, voltage taps in the primary of the transformer
can adjust the AC input voltage to the power controller.
