User manual

Compliance Test System 3.0 User Manual
3.4 PACS Unit
The PACS measurement module can be operated on either 115V or 230 V. It requires less than
0.5 Amps to function.
3.4.1 Mechanical Installation
The PACS unit can be used free standing on a bench and may be placed on top of the AC power
source. Rack handles are standard, and if the optional rack slides are ordered, then the entire
CTS system may be mounted in a standard 19 inch cabinet. The units are fan cooled, drawing
air in from the sides and exhausting at the rear. The sides of the unit must be kept clear of
obstruction and a 6 inch (152 mm) clearance must be maintained to the rear for proper cooling.
3.4.2 EUT Connection Wiring
For single phase wiring diagrams see Figure 3-3, Figure 3-4 and Figure 3-5. For three phase
systems, see Figure 3-6 and Figure 3-7. The wire size used is dictated by the measured currents
and voltages. Any wire used must be rated for the maximum expected current and voltage. The
PACS unit is rated for 40A RMS maximum per phase when the rear power terminals are used
and therefore AWG 8 is recommended if currents >30A and up to 40A are expected. For currents
in the 15 to 30A range AWG 10 is sufficient.
The PACS-3-75 used on 10001iX-CTS and 30003iX-CTS systems is rated for 75 A and as such
requires the use of at least AWG 6 wire gauge or larger diameter.
Caution: It is important to keep the distance between the PACS output and the EUT
as short as possible to avoid adding additional wiring impedance to the test setup.
This is particularly important for flicker test measurements, as the wire impedance will affect the
level of any voltage fluctuations caused by the EUT. Try to limit any output wiring to no more than
5 feet (1.5 meters) or use larger diameter wire as the distance to the EUT increases. Refer to
Figure 3-1.
PACS 1 - Rear Panel View
Equipment
Under Test
To AC Source
or OMNI Load
Connection
AC INAC OUT
Line Neutral
Keep Wire Length
short. (< 5 ft)
Use proper wire
gauge
Figure 3-1: EUT Connection distance and wire gauge.
32 Revision N California Instruments