PAS395 Datasheet, PDF (11/14 Pages) PULS GmbH – Charger for EDLC Capacitors (Ultra-Caps)

12 Protection Features
The output is short-circuit, overload and no-load proof. After removing the fault, an auto-restart
will be performed.
Over- temperature protection:
A temperature sensor monitors the internal temperature of a semiconductor. If the temperature
rises above a certain level, the fan will be turned on. If the temperature keeps rising, the output
will switch off in order to protect the charger. The output will automatically turn on again as soon
as the temperature decreases by 5°C. The “Output-OK” LED will be off and the “Output-OK”
contact will be open when the over-temperature protection is active.
Output over- voltage protection (OVP) circuit:
In case of an internal power supply defect, a redundant circuit limits the maximum voltage on
the output terminals. If the fault has not removed within 2.5s, the “Output-OK” LED will be
turned off and the “Output-OK” contact will open.
Overload and short-circuit protection:
An overload or short circuit on the output will be recognized by the slew-rate of the voltage
change on the output. If the output does not reach typ. 40Vdc within 130s after starting to
charge, the charger will stop and will make a pause of 110s before a new charging cycle starts.
These cycles continue until the fault has been removed.
This document is proprietary. Any dispatch or disclosure of content is authorized only after written authorization by PULS GmbH.
All parameters are specified at 400V, 2.5A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
Specification: SP-PAS395 Rev: 3.1
Date: 2013/01/19
11-14