Kikusui PAS 20-18 - When the Load Has Accumulated Energy such as Batteries

PAS SERIES Before Using the Unit 2-3
2.2.3 When the Load Has Accumulated Energy Such
as Batteries
Connecting a load with accumulated energy, such as a battery, to the
unit may cause current to flow from the load to the internal circuit of
the unit. This current may damage the unit or reduce the life of the
load.
For this type of loads, connect a reverse-current-prevention diode
(D
RP) between the unit and the load in series as shown in Fig.2-4.
• To protect the load and the unit, select DRP according
to the following criteria.
1. Reverse voltage withstand capacity: At least twice
the rat
ed output voltage of the unit.
2. Forward current capacity: Three to ten times the
r
ate
d output current of the unit.
3. A diode with small loss.
• Be sure to take into account the heat generated by
D
RP. DRP may burn out with inadequate heat dissipa-
tion.
• Cannot be used in combination with remote sensing.
Fig.2-4 Remedy against load with accumulated energy
CAUTION
Unit
Load with accumulated energy
DRP: Reverse-current-prevention diode
DRP