1
PSB-48V5A
PSB 54V/5A enclosed switch
mode buffer power supply
Edition: 1 from 28.04.2020
Supercedes the edition: ------------
EN
Features of the power supply:
DC 54 V/5 A uninterruptible power supply
high efficiency 87%
built-in power factor correction system (PFC)
controlling of battery charging and maintaining
protecting of battery against excessive discharging
(UVP)
battery charging current 0,5/1/2 A, changed by
jumper
optional equipment: set of external LED indicators:
PKAZ168, mounting plate DIN4
battery output is full protected against short-
circuit and reverse connection
LED optical signalisation
protections:
short-circuit protection SCP
over voltage protection OVP
surge protection
overload protection OLP
OHP overheat protection
forced cooling - built-in fan
warranty
– 2 year from the production date
1. Technical description.
1.1. General description.
Buffer-type power supply units are intended for continuous power supply to devices that require stabilised voltage
of
48 V DC (+/-15%).
The power supply provides a voltage of
U=54 V DC
with an output current of:
1. Output current of 4,5 A + 0,5 A battery charging
2. Output current of 4 A + 1 A battery charging
3. Output current of 3 A + 2 A battery charging
Total device c battery: 5 A max.
In case of power voltage decay, prompt switching to battery supply occurs. The power supply unit is protected
against a short circuit, an overload, a surge or over voltage protection.
1.2. Technical parameters.
Supply voltage
~ 200
– 240 V; 1,5 A; 50/60 Hz
Inrush current
60 A
Supply power
270 W
Efficiency
87%
Factor PF
>0,95
Output voltage (factory settings)
44-54 V DC
– buffer operation
38-54 V DC
– battery operation
Output current
5 A
Battery charging current
0,5/1/2 A jumper selectable
Voltage adjustment range
53
– 56 V DC
Current consumption by PSU during battery-
assisted operation
approx. 25 mA
Ripple voltage
150mV p-p max.
Short-circuit protection SCP
electronic, automatic recovery
Overload protection OLP
105-150% PSU power, automatically recovered
Overload protection (battery) OLP
melting fuse T5 A
Surge protection
varistors
Overvoltage protection OVP
>60 V (activation requires disconnecting the load or supply
for about approx. 1 min)
Excessive discharge protection UVP
U<38 V (
± 5%) – disconnection of battery
Optical signalisation
LED green
– indicates DC voltage at the power
LED optical indication output (intended for optional
LED AC
– presence of AC voltage
