Basic Elements

Power Converters


LeanEco’s power converters are based on well-known, but state-of-the-art switch mode topologies. We use a multi-level, transformerless switchmode toplogy in order to obtain compact size and high efficiency. We use IGBT switches, three-level switching at 24 kHz switching frequency (quiet!). The converter design is made conservatively and robust – e.g. we design and test a 10 kW module for 150% continuous power. Also, the converters are protected by several layers of hardware protection plus software protection.
All converters are stackable with load sharing. Efficiency – double conversion UPS – is >94% in wide load range. The overall efficiency is further improved when using the power modules in a LeanEco system.

Static Switches

The by-pass switches are used to clear fuses at the loads or to cope with permanent overload.
LeanEco’s by-pass switches are based on fully rated static switches (SCR’s).
There is an independent set of switches for each of the output zones 2 and 3. This allows the
system to handle load faults at one zone without disturbing the other zone.

Man-Machine Interface


The UPS system is autonomous to a new-to-the-world level. Define a few key settings, and the system takes care of the rest.

The Man-Machine-Interface is used to define the key settings. It can also be used to monitor loads, voltages and currents as well as the main system states.

The interface connects via a standard Ethernet (TCP/IP) and supports standard browsers. The MMI is a tool to

  • Configure each output zone (capacity, redundancy, number of power modules )
  • Switch the system into Manual by-pass function
  • If an output zone is given Priority over the other zones

The system itself will perform on-the-fly monitoring of system status and continuous calculation of the most optimal use of the available hardware. Based on this, the system will change itself accordingly.

This means that the system will – by itself – react to events like overloads, module faults, islanding etc. such that faulty modules are replaced, redundant modules are shared, change in loads are adapted to, new modules are initiated and engaged, etc.

SNMP Signalling


Our products offer the standard SNMP signalling interface connected via Ethernet. The SNMP signalling is according to SNMP ver. 3.
Unique for the LeanEco solution, we offer an individual SNMP channel per output zone.
A standard SNMP monitoring software may be used in order to continuously monitor the system status like loading (%), currents, overloads, voltages as well as (changes in) systems states.
The SNMP status is used to trigger server room management software e.g. for a detailed, controlled server shut-down (scheduler).
Based on the monitoring software, it is easy to also provide e.g. alerts via MMS or e-mail.