ferroamp EnergyHub User manual
Revision 3, 2017-03-16
EnergyHub System
Installation and user manual
Warning
•Read the manual before installation
•The EnergyHub may not be opened by unauthorized personnel. Contact Ferroamp for
instructions.
•The electrical installation shall be performed by an authorized electrician in accordance
with electrical standards and safety precautions
•The warranty is not applicable if the products has been modified.
•Observe, the EnergyHub equalizes imbalance between the phase conductors and uses
the systems neutral conductor. Large imbalance causes large currents in the neutral
conductor.
•The DC contact shall not be connected when the EnergyHub is powered up.
Contents
Warning...............................................................................................................................................2
Introduction.........................................................................................................................................3
EnergyHub..........................................................................................................................................5
1. Products.......................................................................................................................................5
2. Location of the EnergyHub.......................................................................................................6
3. Current sensor installation........................................................................................................7
4. Connection to distribution board..............................................................................................9
5. Internet connection..................................................................................................................10
6. EnergyHub Connections.........................................................................................................10
7. Commissioning.........................................................................................................................11
8. DC connection..........................................................................................................................12
9. Example of an EnergyHub system........................................................................................13
10. Schematic Wiring diagram..................................................................................................14
User manual.....................................................................................................................................15
1. Activate ACE and solar production .......................................................................................15
2. Change ACE limit.....................................................................................................................15
3. Grid current and Load current................................................................................................15
4. Activate Solar production........................................................................................................17
Page 3of 19
Introduction
The EnergyHub is an inverter for the modular solar power systems, with new features. The
EnergyHub does not only convert direct current from PV-panels to alternating current, but can also
be used around the clock as an active electricity meter.
Adaptive current Equalization (ACE)
The patented ACE technology dynamically transfer energy between the phase conductors of athree-
phase system, thereby limiting the supply phase currents to the main fuse rating, without limiting the
load currents. This can reduce the required main fuse or increase the load currents, without
increasing the main fuse.
Figure 1 - ACE technology transfers available current from L1 and L3 to L2 so the loads in the facility can be utilized without
an interruption from the main fuse
Page 4of 19
DC nanogrid
The EnergyHub can be used with PV-panels and/or Energy Storage in order to utilize renewable,
locally produced, energy. This is enabled through the optimizers as they work as DC/DC converters
for solar power and Energy storages. The EnergyHub works as a bidirectional bridge between the
DC nanogrid, created bythe optimizers, and the AC grid inside the facility. With this system, batteries
can be charged directly with solar power or with electricityform the ACgrid, depending on the season
and weather. Accordingly, the EnergyHub is used both as a rectifier and inverter.
Figure 2 - Overview of how a DC nanogrid could be configured
Page 5of 19
EnergyHub
1.Products
EnergyHub 7 or 14 kW
Mounting plate, wall.
3 current sensors with 10m connection cables.
Contact Ferroamp for other sizes.
Contact for current sensors
Contact for DC grid connection
Five pole three phase contact for AC grid
connection
3G modem for internet connection
(optional for installations in Sweden)
Page 6of 19
2.Location of the EnergyHub
•Make sure there is enough space around the EnergyHub to enable a safe installation and steady
airflow.
•Mount the EnergyHub indoors or in a suitable enclosure with
sufficient ventilation.
•The wall and fasteners needs to be able to carry at least 25
Kg.
•Remember that the specified ambient temperature is 0-
40°C.
•Relative humidity: 0-95%.
•Mount the EnergyHub on the mounting plate and make sure
it is correctly placed on designated spot. Tighten with
screws.
Page 7of 19
3. Current sensor installation
•There are 3 available current sensors. The size of the current transformer is decided of the
current flowing through the cable and its physical size.
< 100 A, ratio 2000
< 160 A, ratio 4000
< 600 A, ratio 6000
Page 8of 19
Install the current sensors on all three of the phase conductors. The sensors should be installed on
the main feed cables.
See wiring diagram in section 4
•The EnergyHub has an automatic calibration for each of the current sensors which handles the
current direction and phase.
•Observe. In order to facilitate the analysis and identifying different loads in the facility the sensor
marked with 1 should be connected to L1, 2 with L2 and L3 with 3
•Adjust the length of the cable and connect it in accordance with the picture below. Only 6 wires
are used, please note the order.
Location of the current sensors
In order to facilitate the collected data from the measurements it is important to install the current
sensors on the correct distribution board. As an example, in order to produce a correct fuse
analysis, the current sensors need to be installed so they measure all the current going through the
main fuses.
Page 9of 19
4.Connection to distribution board
•Connect the EnergyHub with the delivered five pole three-phase contact.
•A disconnect switch is recommended between the distribution board and the EnergyHub
•The current in the neutral conductor can be 1.7 times higher than the rated current which should
be considered while dimensioning the cable for the EnergyHub. The connection cable for the
EnergyHub needs to be able to handle the heat that may occur. E.g. for an EnergyHub with 20 A
ACE the current in the neutral conductor can be 34 A
Figure 3 - Wiring diagram for the Energyhub and current sensors
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