AMETEK MX CTSL - Manual (Page 31)

User Manual MX-CTSL Compliance Test System
California Instruments Revision J 31
3.4.3 Wiring
Power from the MX three-phase output connector should be routed to the OMNI AC Input terminal block
located at the rear of the OMNI-3-37MX. The recommended wire gauge is #4.
Output power from the OMNI-3-37MX must be routed to the PACS-3-75 input connector. (TB4) To access
the PACS-3-75 AC input and output connections, the rear-top cover of the PACS-3-37MX must be
removed. This wiring is generally provided with the system. Wire size used is AWG #6, which is the
maximum size supported by the PACS-3-75 connectors. Note that the wire fits very tightly in theTB4
connector. It may be necessary to twist stranded wires firmly to make the wire fit the connector opening.
The EUT connections can be made at TB3 AC OUT of the PACS-3-75. The wire size should be AGW #6
also. To gain access to power connector TB3, the access panel located on the top rear of the PACS-3-75
unit must be removed. Remove the four screws holding the connector access panel in place and remove
the panel. Once input and output wiring is complete, reattach the connector access panel.
The connection diagram is shown in Error! Reference source not found.. Note that the PACS-3-37MX is
installed between the MX45-3Pi and the PACS-3-75. Wiring diagrams for other possible systems
configurations are shown in Error! Reference source not found. through Figure 3-8 (or Error! Reference
source not found. through Figure 3-8 for older version OMNI-3-75 cabinet systems) depending on system
configuration.
Note that the OMNI-3-75 is normally only present on MXCTSH or MXCTSHL system configurations.
Note: This wiring supports EUT load currents up to 75 Arms. For higher power EUT's used with the MX-45,
the PACS-3-75 should not be left in the circuit. Instead, EUT's that require higher currents should be
connected directly to either the MX output, which is rated for higher currents than the PACS-3-75. In
this case, harmonics and flicker testing is not supported.
Note: The OMNI-3-37MX supports EUT load currents up to 37 Arms in FLICKER mode and 54 Arms in
BYPASS mode. Any time the OMNI-3-37MX is connected between the MX and the EUT, the
programmable current limit of the MX MUST BE SET TO NO MORE THAN 37 Amps per phase during
flicker tests. If not, serious damage to the OMNI-3-37MX could result. This type of damage resulting
form use above it’s maximum current rating is not covered under the normal product warranty.