To resolve high BUS voltage because ups' load will create regenerated energy and feedback to grid or battery group.
It is a good option when ups is installed in special industrial load equipment,eg. high speed lift, electric motor etc.
includes output isolation transformer and input isolation transformer.
Output transformer is used to complete isolate output N-line and Ground line(ups chassis), voltage between N and G not exceeding 1 volt. In order that load equipment will be free of electric interference, and avoid wrong operations.
Input isolation transformer is desgined there to filter out third harmonic from the grid and reduce interference.
Avoids bad effection from other equipment in the same grid supply.
Users are free to decide/plan to add input or output isolation transformer : 10k,20k,30k,40k are built-in with isolation transformer, 60k,80k are external with transformer.
Dual charger boards:
It is very convenient to add one additional charger board to parallel with standard charger board to accelerate battery
Such a temperature sensor is used to auto detect ups working temperature variation because SLA battery belongs to limited
lifespan stuff and sensitive to temperature changement. With such a temperature sensor, ups charger' temperature compensation will be activated via Lcd, ups will auto adjust charger voltage to protect and extend battery service time.
Dust filter is used to keep object of 1mm diameter, especially metal object out of ups chassis to achieve IP51 protection class.
IP21 optional device:
Purpose-design for 60k, 80k as it is top-openning and vertical ventilation to keep object of 12mm diameter, or dropping water out of ups chassis.
ups power supply 20kva specification
ups power supply 20kva schematic diagram
ups power supply 20kva terminals block wiring diagram
ups power supply 20kva testing device of power feedback module 60kva