This manual explains the details of designing, installing and configuring three-phase and parallel systems.
Three phase systems
Using our 15kVA Quattros, the maximum system size is a 180kVA three phase system. Which then consists of four units on each of the three phases: 12 units in total.
Using our 10kVA Quattros, the maximum system size is a 150kVA three phase system. Which then consists of five units on each of the three phases: 15 units in total.
Single phase systems
This is the same as above, but then per phase:
Do not underestimate the complexity of making such large systems. We do not support untrained and/or inexperienced installers working on these size systems.
Before installing system of 60kVA or larger, first install and get experience with smaller systems. Start with single phase single unit, then for example 30 or 60kVA.
Or hire an installer that does have experience with these large systems, for both the design and the commissioning.
Both the DC and AC wiring needs to be symmetrical per phase: use the same length, type and cross-section to every unit in the phase. To make this easy, use a bus-bar or power-post before and after the inverter/chargers.
Also beware of sizing the battery cable and jumpers between cells/batteries.
For units in parallel: use one AC fuse for all units on that phase. Both on the input, and on the output. Multiple fuses which are mechanically connected together is ok: that is also one fuse.
For DC, one fuse per phase is best. If a big single fuse is not available, use one fuse per unit. Same type of fuse due to same resistance.
Beware of phase rotation between the inverter and AC in. When wired in the wrong rotation, the system will not accept the mains input and only operates in inverter mode. In that case swap two phases to correct it.
Note: Do not over-dimension the AC cabling. Using extra thick cabling has negative side effects.
Theory and background information on wiring is further explained in these presentations:
In the VE Configuration tools there are two different programs. One to configure small systems and one for larger systems:
Activate VEConfigure from within these programs to make settings per unit. Right click, and select VEConfigure.
Make the following settings in the master of L1:
The following settings need to be made in the master of each phase:
The following settings need to made in each unit in the system:
A quick way to make settings in all units is the 'send to all units' feature. You'll see the option after making the changes to the first unit.
Note that AES is only operational in stand-alone systems. Not in parallel and multi-phase systems.
A unique virtual switch configuration can be configured for each unit in the system. With the exception of the Ignore AC input function: configure that in the master of L1.
(nb: In some cases (depending on the choices made) slaves can left out, the assistant will notify you about this.)
With all the other Assistants: genset start/stop, relay locker etcetera, a unique configuration can be made in each unit.
Tip: a quick way to load Assistants into each unit in the system is to save the settings after configuring the master in L1. Then open VEConfigure for an other unit and load that file. VEConfigure will automatically adapt the Assistants for the slaves. (note: In some cases you might get some warnings. Please step through the assistant in that case.)