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Victron Lynx Smart BMS 500 Manual

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5.2. System sizing
5.2.1. Current rating Lynx Smart BMS
The Lynx Smart BMS is available in a 500A model.
The Lynx Smart BMS is rated to a specific current. Do not exceed this current rating.
The Lynx Smart BMS is equipped with an over-current protection. The 500A Lynx Smart BMS will allow 600A for 5 minutes. But
as soon as the current or the time has been exceeded, an alarm will be generated. The contactor will not open. An over current
alarm will be generated and ATC or ATD (depending on current direction) is disabled after 30s delay.
It is not possible to parallel multiple Lynx Smart BMS modules. Only a single Lynx Smart BMS can be used per system.
The table below gives an idea of how much power a Lynx Smart BMS is rated for at different voltages. This will give you an
indication how big the connected inverter/charger system can be. Do keep in mind, that if inverters or inverter/chargers are used,
both the AC and the DC system will be powered from the batteries.
Table 2. Current and power rating Lynx Smart BMS
12V 24V 48V
500A 6kW 12kW 24kW
1000A 12kW 24kW 48kW
A 1000A model will be added late 2021
5.2.2. Fusing
The Lynx Smart BMS does not contain a fuse. Fusing needs to be done externally. This can be done by connecting Lynx
Distributor modules to the Lynx Smart BMS or by using external fuse holders and fuses.
Always use fuses with the correct voltage and current rating. Match the fuse rating to the maximum voltages and currents that
potentially can occur in the fused circuit. For more information on fuse ratings and fuse current calculations see the Wiring
Unlimited book.
The total value of the fuses of all circuits should not be more than the current rating of the Lynx module, or the
Lynx model with the lowest current rating in case of multiple Lynx modules are used.
5.2.3. Cabling
The current rating of the wires or cables used to connect the Lynx Smart BMS to batteries and/or the DC loads has to be rated for
the maximum currents that can occur in the connected circuits. Use cabling with a sufficient core surface area to match the
maximum current rating of the circuit.
For more information on cabling and cable thickness calculations see the Wiring Unlimited book.
Lynx Smart BMS
Page 12 System Design
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