Data Sheet

UB20.241
UB-Series
24V, 20A, DC-UPS
17. PROTECTION FEATURES
Output protection In power supply mode:
The DC-UPS is protected by the current limitation of the supplying power
supply or a circuit protector on the input in case the power supply has an
ampacity greater than 28A.
In battery mode:
The DC-UPS is electronically protected against overload, no-load and
short-circuits
Output over-voltage protection typ. 32Vdc
max. 35Vdc
In case of an internal DC-UPS defect, a redundant
circuit limits the maximum output voltage in battery
mode. The output shuts down and automatically
attempts to restart.
Degree of protection IP 20 EN/IEC 60529
For use in a controlled environment according to CSA
22.2 No 107.1-01.
Penetration protection > 3.5mm E.g. screws, small parts
Over-temperature protection included for
battery mode
Output shuts down with automatic restart.
Additional temperature protection for charging of
batteries can be found in chapter 5.
Input over-voltage protection max. 35Vdc No harm or defect of the unit
Internal input fuse no
Reverse input polarity protection included Max. -40V
Reverse battery polarity protection included Max. -35Vdc
Protection against wrong battery voltage included Max. +35Vdc
Battery deep discharge protection included Buffering will stop when deep discharge protection is
active. Battery will be disconnected from the DC-UPS.
18. SAFETY FEATURES
Input / output separation not provided The minus-pole is internally hard-wired with the minus-
pole of the input and battery terminals.
Output voltage SELV IEC/EN 60950-1,
The input must be powered from a SELV power source.
PELV IEC/EN 60204-1, EN 50178, IEC 62103, IEC 60364-4-41,
The input must be powered from a PELV power source.
Class of protection III PE (Protective Earth) connection not required
Isolation resistance *) > 10MOhm
> 10MOhm
> 10MOhm
Power port to signal port
Power port to housing
Signal port to housing
Touch current (leakage current) The leakage current which is produced by the DC-UPS itself depends on the input
voltage ripple and need to be investigated in the final application. For a smooth DC
input voltage, the produced leakage current is less than 100A.
*) Center-tap terminal is categorized in the group of “power port”.
Feb. 2016 / Rev. 2.1 DS-UB20.241-EN
All parameters are specified at 24V, 20A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
21/31