User Manual – Rev B
FCS Series II
Note: The output of the power source is isolated from the input line and floating with
respect to chassis ground. If needed, either side (A,B,C or NEUT) may be
grounded.
The output power cables must be large enough to prevent a total voltage drop exceeding 2% of
the rated output voltage between the power source and the load. Note that wires must be sized
to accommodate the maximum current that is available. This may be a function of the voltage
range and phase mode of the FCS model on hand. Always use the current available on the l
voltage range to size the wires.
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: F
ow
or multi-cabinet FCS systems, ensure that output cable lengths from Master and
Auxiliary chassis to EUT are of identical length.
Recommended wire gauge sizes for different levels of EUT load currents are shown in below.
LOAD CURRENT
WIRE GAGE
45A 8
AWG
90A 4
AWG
135A 2
AWG
200A 0
AWG
Table 3-3: Wire Gauge table.
3.5.2 Output Terminal Block - TB3 - OUTPUT
Each FCS chassis has a single AC output terminal block. The output terminal block junction box
must be closed (covered) at all times except when reconnecting an EUT. The terminal blocks
are large enough to accommodate required wire gauge sizes. The terminal block is located in
the lower left corner on the rear panel of the unit. (Looking from the back).
Multi-chassis configurations have two or more output terminal blocks, one on the master FCS
chassis and one on each of the auxiliary FCS chassis.
For operation as a multi-chassis system, the outputs of all FCS chassis’ must be connected
together using the additional terminal blocks provided in the ship kit.
Keep the wire lengths
between each chassis and this common terminal block the same.
Connector
Terminal
Mode
FCS Output
TB3
1
3 Phase & 1 Phase
ØA
2
3
Phase
ØB
3
3 Phase
ØB
4
Common / Neutral
NEUT
Table 3-4: Output Terminal connections.
California Instruments
32
Summary of Contents for FCS Series II
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