AMETEK Ls Series - Manual (Page 42)

User Manual Lx / Ls Series
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3.4 AC Input Wiring - INPUT
AC input connections are to be made directly to the input fuse block of all units that make up a Lx
/ Ls system. The input block is located on the lower right hand corner of the back of the
4500Lx/Ls and 4500Lx/Ls-
NO chassis. It is labeled “INPUT” on the Lx and “INPUT TB3” on the
Ls models.
Ground (earth) wire must be connected to the chassis of the AC power system using the ground
connection of the AC input fuse block. The mains source must have a current rating equal to or
greater than the input fuses and the input wiring must be sized to satisfy the applicable electrical
codes.
The input power cables must be large enough to handle the input current of the power source
and must conform to local electrical codes. Consult a qualified electrician prior to installation.
Note that all wires must be sized to accommodate the worst-case maximum current that may
occur under low line conditions. Local electrical codes may also require different wire types and
sizes.
Cable lengths must not exceed twenty-five (25) feet. For lengths greater than 25 feet, calculate
the voltage drop from the following formula:
2 X DISTANCE X CABLE RESISTANCE PER FT. X CURRENT = VOLT DROP
Note: If possible, keep input cable lengths for Master and Auxiliary chassis equal.
CAUTION: Capacitors in the power source may hold a hazardous electrical charge
even if the power source has been disconnected from the mains supply. Allow
capacitors to discharge to a safe voltage before touching exposed pins of mains
supply connectors.
Power modules need at least 10 Minutes to discharge to safe levels before they can be
removed.
3.5 Output Connections
3.5.1 Output Wiring
The output terminal blocks for each unit are located at the rear of the unit. Three phase output
connections are made to the terminal block labeled OUTPUT. For a 9000Lx/2 or 9000Ls/2two
box system, the output terminals from both the master 4500Lx or 4500Ls and Auxiliary 4500Lx or
4500Ls must be connected together. See Figure 3-3.
On Lx Series, the phase outputs are labeled ø1, ø2, ø3 and COM. (Same labeling as Hewlett
Packard / Agilent HP6834 and California Instruments iL Series) The common (neutral)
connection (if needed) can be made on the same terminal block labeled COM. If the power
source is operated in single-phase mode, all power is available from the ø1 output connection.
The neutral connection (COM) is always required for single-phase output mode on a 9000Lx/2
and may be used if needed for the EUT for all three-phase output modes.
On Ls Series, the phase outputs are labeled øA, øB, øC and NEUT. (Same labeling as California
Instruments L Series) The neutral connection (if needed) can be made on the same terminal
block labeled COM. If the power source is a single-phase model or operated in single phase
mode, all power is available from the øA output connection. The neutral connection (COM) is