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Dynamic Load Management (DLM) for Stand Alone
GTB Twinbox
DLM reduces charging current when demand of current elsewhere
increases. Simple to say, the GTB Twinbox balance the charging
current that you will get as much power as possible to the EV that
is available in the system without any risk to overload the mains
fuses.
To activate DLM, a Modbus energy meter must be installed in
the supply distribution box. The following energy meters are
approved:
• Garo GNM1D-RS485
• Garo GNM3D-RS485 (current transformer 3-phase.
Max current is based on current transformer)
• Garo GM3T-RS485
• Garo GNM3T-RS485
• CG EM 112
• CG EM 270
• CG EM 271
For use in systems that have local electricity production (solar cell,
wind etc)
Garo GNM3D-LP-RS485 (current transformer 3-phase. Max
current is based on current transformer)Garo
GNM3T-LP-RS485
Note the energy meter's Modbus address must be set to 2, 100
or 101.
Adress 2: Recommended for a stand alone GTB Twinbox. Setting
for SW1 CC2 is valid and charging process are paused if
available current drops below 6A.
ON
OFF
ON
3
3
2
2
1
1
16 A
20 A
(bild 12)
INSTALLATION OF STANDALONE GTB TWINBOX
OFF
ON
OFF
3
2
1
25 A
EN
Adress 100 or 101: Only recommended when multiple GTB
Twinboxes are connected in a grid. Minimum charging current is
6A and charging process is not terminated by the DLM function.
This mode require an installed wifi module.
The energy meter continually measures the total energy
consumption for each phase. The data is transmitted to the
GTB Twinbox, that then is reducing the charging current when
necessary in order to prevent the mains fuses from tripping.
In one-phase systems, the energy meter needs to be installed to
same phase as the GTB Twinbox.
Connection of the energy meters Modbus cable:
Terminal 200: A -
Terminal 201: B +
Recommended cable is twisted pair shielded signal cable
approved for Modbus communication.
Settings in the Energy meter:
•
Modbus address 2 (recommended), 100 or 101 (9600
baud, no parity, one stop bit).
•
Set SW2 (Dip 1-3) CC2 to max available Ampere (A) (see
settings for max available Ampere from mains)
ON
OFF
ON
OFF
3
3
2
2
1
1
32 A
40 A
11
ON
OFF
ON
OFF
3
3
2
2
1
1
50 A
63 A
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