AMETEK MX CTSH - Manual (Page 26)

California Instruments Revision H 26
User Manual MX Series CTSH Compliance Test System
3.4 OMNI-3-75 Unit
The OMNI-3-75 Ztest impedance provides 0.15 + 0.15j Ohms for each phase and 0.10 + 0.10j Ohm for the
neutral. This Ztest is required for IEC 61000-3-11 flicker test.
3.4.1 Mechanical Installation
The OMNI-3-75 is contained in a separate 19" cabinet with a 43" height. This cabinet should be placed
next to the MX-45-3Pi or RS90 and connected via the System Interface with the provided DB-37 to DB-37
cable. (CI P/N 7003-283-1).
The OMNI-3-75 has its own IEC320 AC power input for bias power. The front panel On/Off rocker switch
located at the bottom of the cabinet is used to turn the OMNI on or off. Note that if the OMNI is turned off,
the power connection between the MX-45-3Pi/RS90 and the PACS-3-75 measurement unit is opened.
For compliance testing, the OMNI-3-75 must be turned on.
The OMNI-3-75 can operate in one of two modes:
Bypass mode This mode is used during harmonics test
Flicker mode This mode is used during flicker test
The mode is controlled by the CTSMXH Software through the MX power source remote control interface
from the PC. The MX in turn uses the system interface to the back of the OMNI-3-75 to select the
requested OMNI mode.
3.4.2 Front Panel Controls
The front panel contains the AC power On/Off switch, the BYPASS or ENGAGE status lights and a manual
MODE switch button. The mode switch button is normally disabled and the OMNI-3-75 state is controlled
through the MX system interface.
The “ON “ LED indicates the OMNI-3-75 module is powered up.
Note: The OMNI-3-75 must be turned on to operate in either mode. In the powered off state, power
connections between the MX and the PACS-3-75 are disconnected. (open)
The front panel power switch is located on the left hand bottom side of the OMNI-3-75 cabinet front. There
is a built in delay for engaging or disengaging the contactors when turning the OMNI-3-75 on and off.
OMNI-3-75
Connect
Breaker. OMNI On/Off
Switch
OMNI-3-37MX
Connect
Breaker.
OMNI-3-75
Manual Mode
Control.