GW Instek PSW Series - Internal Resistance

PSW Series User Manual
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when power is turned off and the load is
disconnected. Without a bleed resistor, power
may remain charged on the filter capacitors for
some time and be potentially hazardous.
In addition, bleed resistors also allow for
smoother voltage regulation of the power
supply as the bleed resistor acts as a minimum
voltage load.
The bleed resistance can be turned on or off
using the configuration settings.
Note
By default the bleed resistance is on. For battery
charging applications, be sure to turn the bleed
resistance off as the bleed resistor can discharge
the connected battery when the unit is off.
Internal Resistance
Background
On the PSW, the internal resistance of the
power supply can be user-defined in software.
(Internal Resistance Setting, page 105). When
the internal resistance is set it can be seen as a
resistance in series with the positive output
terminal. This allows the power supply to
simulate power sources that have internal
resistances such as lead acid batteries.
Internal
Resistance Range
Unit Model
Internal Resistance Range
PSW 30-36
0.000 ~ 0.833Ω
PSW 30-72
0.000 ~ 0.417Ω
PSW 30-108
0.000 ~ 0.278Ω
PSW 80-13.5
0.000 ~ 5.926Ω
PSW 80-27
0.000 ~ 2.963Ω
PSW 80-40.5
0.000 ~ 1.975Ω
PSW 160-7.2
0.000 ~ 22.222Ω
PSW 160-14.4
0.000 ~ 11.111Ω
PSW 160-21.6
0.000 ~ 7.407Ω