Rear Panel Connections; Grounding; Input Power Connection - Advanced Energy MDX II User Manual

REAR PANEL CONNECTIONS

DANGER:
RISK OF DEATH OR BODILY INJURY: disconnect all sources of input power and
wait a few minutes before working on this unit or anything connected to it. Internal
components may remain live for 1 min after the MDXII unit has been disconnected.

Grounding

On the MDX 15k, a potential equalization ground stud is located in the upper right-hand
quadrant of the rear panel. On the MDX 30k, this ground stud or terminal is located above and
to the left of the input line cord. The terminal is an M6 stud, indicated on the rear panel by the
symbol . The terminal is connected internally to the main terminal block ground position
indicated by the letters "PE."
DANGER:
Connect the potential equalization ground stud on the MDXII rear panel to protective
earth-ground before making any other connection.
Note: For optimum performance, ground the chassis stud to the chamber ground.
In multi-unit configurations (master/slave combinations, providing from 30 kW to 120 kW),
the MDXII unit operates more reliably and is less sensitive to spurious noise if both the
MDXII chassis and the system are grounded. The preferred method of chassis grounding is to
daisy-chain a flat copper braid of AWG-10 equivalency between units. Use only one lead to
connect the system ground block to the daisy-chained units.
Note: For more information about grounding, refer to AE Application Note #5600031
(Grounding), available from Customer Support.

Input Power Connection

The standard line voltages are either 380/400/415 V ac rms or 460/480 V ac rms, three phase,
50/60 Hz. All power supplies leave the factory with their input and output voltages identified
on an enclosed configuration checklist and on a label plate on the rear of the unit.
The input connector on the MDXII 15k is a five-position, high-current, terminal block (TB) on
the rear panel (see Figure 4-5 on page 4-9). Labels on the input terminal shield and below each
terminal position show line (L
(PE, or the protective earth symbol).
5700262-R
,L , L ), neutral (N), and protective earth-ground connections
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Installation
MDXII Power Supplies
4-7