Datasheet

© EA Elektro-Automatik in 2020 - Subject to modification without notice, errors and omissions excepted
EA-PSB 9000 2.5 kW
Programmable bidirectional DC power supplies
AC supply
All models are provided with an active Power Factor Correction (PFC) circuit and are designed for operation
on a single phase supply with 230 V (±15%). During load operation, the device regenerates the consumed DC
energy and feeds it back into the local power network. This helps saving a lot of energy costs.
Autoranging power stage
All models are equipped with a exible autoranging bi-
directional power stage which provides a higher output
voltage at lower output current or a higher output cur-
rent at lower output voltage, always limited to the max.
rated output power. The same applies for sink mode oper-
ation. The power set value is adjustable with these mod-
els. Therefore, a wide range of applications can already be
covered by the use of just one unit.
DC output/input
DC voltages between 0...60 V and 0...750 V, current ratings between 0...20 A and 0...120 A and a power rat-
ing of 0...2.5 kW are available. The DC terminal is located on the rear panel.
Source-sink operation
One salient feature of these devices is the coalescence of an electronic load, also called sink, and a pow-
er supply, also called source, into one unit. It means, the device cannot only arbitrarily operate as sink or
source, the switchover between these two operating modes occurs without interruption and time loss.
This is also called two-quadrants operation.
Energy recovery
The most important feature of these devices is that the AC input while connected to the grid is also used
as output for the recovery of the supplied DC energy during load operation, which is converted with an ef-
ciency of up to 95%. This way of energy recovery helps to lower costs and can avoid expensive cooling
systems, such as they are required for conventional electronic loads which only convert energy into heat.
Principle view.
ENERGY
AC/DC
EUTs
Operation of these energy recovering devices, in terms of electricity generation, is not intended. Grid pro-
tection devices which can supervise the feedback of energy into the public grid are available on the market
for optional installation and are installed to achieve additional safety of persons and equipment, especially
when running the so-called isolated operation.