AMETEK Compact i/iX Series Software Manual - Manual (Page 32)

User Manual – Rev H California Instruments
32 Avionics Software
3.2 –160 Power Groups
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 voltages 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.
D: 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 power source or from the
main Gui control screen.