Page 32 - PHU_User Manual_EN_Rev A

PHU Series User Manual

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.
By default the bleed resistance is on. For battery
Note 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 PHU, the internal resistance of the power
supply can be user-defined in software. (Internal
Resistance Setting, see the Settings on page 108.)
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. By default the internal
resistance is 0 Ω.
Unit Model Internal Resistance Range
Internal PHU 80-170 (0.0000 to 0.4706) Ω
Resistance Range
PHU 80-340 (0.0000 to 0.2353) Ω
PHU 80-510 (0.0000 to 0.1569) Ω
PHU 200-70 (0.0000 to 2.8571) Ω
PHU 200-140 (0.0000 to 1.4286) Ω
PHU 200-210 (0.0000 to 0.9523) Ω
PHU 500-30 (0.000 to 16.667) Ω
PHU 500-60 (0.000 to 8.333) Ω
PHU 500-90 (0.0000 to 5.5556) Ω
PHU 750-20 (0.000 to 37.500) Ω
PHU 750-40 (0.000 to 18.750) Ω
PHU 750-60 (0.000 to 12.500) Ω
PHU 1000-15 (0.00 to 66.67) Ω
PHU 1000-30 (0.000 to 33.333) Ω
PHU 1000-45 (0.000 to 22.222) Ω
PHU 1500-10 (0.00 to 150.00) Ω

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