Power Supply PS1000-A6-24.10
Application Notes
20
21
-1
1
37
Figure 26.3 30A peak current for 12ms , typ. (3x the nominal current)
26.2
Back-feeding Loads
Loads such as decelerating motors and inductors can feed voltage back to the power supply.
This feature is also called return voltage immunity or resistance against Back- E.M.F.
(
E
lectro
M
agnetic
F
orce).
This power supply is resistant and does not show malfunctioning when a load feeds back
voltage to the power supply. It does not matter whether the power supply is on or off.
The maximum allowed feed-back-voltage is 35Vdc. The maximum allowed feed-back peak
current is 40A. Higher currents can temporarily shut-down the output voltage. The absorbing
energy can be calculated according to the built-in large sized output capacitor which
is specified in chapter 8.
26.3
External Input Protection
The unit is tested and approved for branch circuits up to 30A (UL) and 32A (IEC).
An external protection is only required if the supplying branch has an ampacity greater
than this. Check also local codes and local requirements. In some countries local regulations
might apply.
If an external fuse is necessary or utilized, minimum requirements need to be considered
to avoid nuisance tripping of the circuit breaker. A minimum value of 6A B- or C-Characteristic
breaker should be used.
10ms/DIV
Output Voltage
Output Current
24V
0A
12ms
30A
10.5V
Note
The DC-OK relay triggers when the voltage dips more than 10% for longer than 1ms.
Peak current voltage dips Typically from 24V to 17V at 20A for 50ms, resistive load
Typically from 24V to 19V at 50A for 2ms, resistive load
Typically from 24V to 15.5V at 50A for 5ms, resistive load
