DayStar DS-100c, Руководство пользователя

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page C14 DS-100C Operating Manual
connecting or disconnecting the test leads, it becomes more important at higher
PV voltages.
Note: the DS-Tracer DISCONNECT switch is not rated to break the electrical
current at the full voltage and current rating of the DS-Tracer.
The DS-Tracer should always be connected through a PV system disconnect
rated at the PV system V
oc
and I
sc
values as shown in Figure 9. A system switch
provides a way to break a circuit should the DS-Tracer have a major internal
failure.
Figure 9. Use of PV system disconnect switch.
Voltage Range Switch
The voltage-range switch changes the electrical configuration of the capacitors
that form the load for the PV array. It will not affect the measurement range of
the I-V curve but it does affect how quickly an I-V curve is taken. In the low
voltage setting, the DS-Tracer has more load capacitance and therefore a curve
is swept slower. Note: This affects how quickly the PV array sweeps from I
sc
to
V
oc
. It does not affect how long it takes a curve to plot in IVPC.
The higher I
sc
and the lower V
oc
the more quickly a curve is taken. If curves are
swept too fast, the dynamic characteristics of the PV array can become
!
DS-Tracer
PV Array
System
Disconnect
Switch
Test Lead