so i searched some websites and i found this:
PSP 3000 Series
STANDBY POWER SUPPLY
•Totally modular construction, easy to install,
test and maintain.
•Constant voltage ferroresonant transformer
•Quasi-square wave output in ferroresonant
mode and square wave output in standby
mode for farther distance of transmission.
•90% High efficiency at full load, long life and
•Input surge protection.
•Automatic switch over when either module is
unplugged and no loss of power when either
module is removed.
•Output short circuit protected to withstand
the short in long time and automatic restart
upon short is removed.
•Current limited output and overload protection.
•Auxiliary AC convenience outlet.
•Positive disconnect when generator input.
•Cooling fan operates in standby mode only.
•Thermostatically controlled battery charging.
•Three status indicators on bottom of housing.
•Lightweight all-aluminum housing for noise reduction.
•All external fasteners stainless steel, durable and weatherproof housing design idea for use in the
harshest of environments.
•Security lock and auxiliary mounting bracket.
•Available in various input/output voltage and frequencies for international applications.
3200 Series Standby Power Supply, 2 Batteries Type
3300 Series Standby Power Supply, 3 Batteries Type
Output Current 6 Amps.
Output Current 9 Amps.
Output Current 12 Amps.
Output Current 15 Amps.
Input 230VAC/50Hz, Output 48 VAC
Input 220VAC/50Hz, Output 42 VAC
B Batteries Included
N Batteries Excluded
is this true that there is a PSP 3000 Series STANDBY POWER SUPPLY