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User Manual
i Series / iX Series 155
9.1.2.5 Initial Setup
The
–160 option supports both AC and DC modes of operation. The correct mode is a function of
the EUT to be tested and the operator must select the corresponding operating mode first. This
can be done from the front panel if needed or using the CIGui32 program. Use of the CIGui32
program for all settings will be assumed for the remainder of this chapter.
The following twelve power groups are covered in the RTCA/DO-160 directive:
Category reference:
- For ac equipment: A(CF), A(NF), and A(WF)
-
For dc equipment: A, B, Z
-
AC tests can be performed at 115V nominal or 230V nominal, except A(NF) and
A(CF) which can only be done at 115V nominal. All AC line voltage shown are L-N.
- DC tests can be performed at 28V nominal or 14V nominal
Definitions:
A(CF): designates ac equipment intended for use on aircraft electrical systems where the
primary power is from constant frequency (400 Hz) ac system.
A(NF): designates ac equipment intended for use on aircraft electrical systems where the
primary power is from narrow variable frequency (360 to 650 Hz) ac system.
A(WF): designates ac equipment intended for use on aircraft electrical systems where the
primary power is from wide variable frequency (360 to 800 Hz) ac system.
A: designates dc equipment intended for use on aircraft electrical systems where the dc is
generated from primary power supplied from either a constant or variable frequency ac system.
B: designates dc equipment intended for use on aircraft electrical systems supplied by engine-
driven alternator/rectifiers, or dc generators where a battery of significant capacity is floating on
the dc bus at all times.
Z: designates dc equipment that may be used on all other types of aircraft electrical systems
applicable to these standards. Category Z shall be acceptable for use in lieu of Category A or
Category B.
The required steady state output settings for each power group must be selected based on the
type of EUT to be tested. These settings can be made from the front panel of the iX Series power
source or from the main CIGui32 control screen.