AMETEK MX CTSL - Manual (Page 32)

User Manual MX-CTSL Compliance Test System
California Instruments Revision J 32
3.5 OMNI-3-37MX 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. MXCTSHL system configurations will have
both OMNI’s installed in the OMNI-3-75 cabinet. Refer to user manual P/N 7003-972 on MXCTSHL
configuration details.
3.5.1 OMNI-3-75 Hardware Versions
Note that original versions of the OMNI-3-75 (version 1) did not have front panel circuit breakers that
enable disconnection of the OMNI output to the PACS input. Later versions of the OMNI-3-75 (version 2)
do have either one or two front panel breakers. These breakers replace the need to manually connect and
disconnect one of the other OMNI in MXCTSHL systems that contain both an OMNI-3-75 and an OMNI-3-
37MX.
Note: The MXCTSHL systems have both OMNI’s, OMNI-3-75 and OMNI-3-37MX. Only one of the two circuit
breakers should be turned on (connected) at one time. If both are on, the two OMNI’s will be in
parallel and the correct reference impedance will not be present. Thus, always connect (close) only
one of the two circuit breakers on the OMNI-3-75 cabinet at a time.
The circuit breakers provide additional protection against over current for each of the relevant OMNI circuits
and PACS.