Elgar SmartWave SW1750A, Operation Manual

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SW 5250A•SW 3500A•SW 1750A Installation
Operation Manual 2-13
2.9
2.9.1
Output Connections to the Load
SW 5250A Output Connections
The Model SW 5250A can power 1-phase, 2-phase and 3-phase loads. Local or
remote sensing can be used; if no sense lines are connected, the unit automatically
reverts to local sense. Outputs may be directly paralleled for greater power. If the
outputs are paralleled it is important to program the unit to the parallel mode before
shorting the outputs together (refer to Figure 2–4). Outputs cannot be placed in series
since the Neutral is common. However, by programming two phases 180° apart, double
voltage, single phase is achieved.
Any phase sequence of wiring can be used.
The sense Neutral is also common. Thus, it is important to wire the sense wires
properly (refer to Figure 2–5). If remote sense is used:
•
Sense A is connected to Power A;
•
Sense B is connected to Power B;
•
Sense C is connected to Power C; and
•
Neutral Sense is connected to Neutral Power.
The three waveform outputs (TRIGGER OUT, CLOCK & LOCK,
SYNC OUT) share the same ground. This ground should not
exceed ±20V Peak from chassis ground. If possible, this ground
should be connected to the chassis.
Output power neutral must be connected to chassis ground for
safe operation. The SW system is shipped with a green/yellow wire
connected from output power neutral to chassis ground.
It is important that the Neutral not be >20V away from the chassis
potential; the unit will shut down if this voltage is exceeded.
If a transformer or inductive load is present, the unit should be programmed to AC. This
prevents small amounts of DC being generated, which may saturate the magnetics.
For best performance, the sense leads should be connected and output neutral should
be connected to chassis ground.