Lynx Smart BMS 4.2. System sizing The main safety contactor of the Lynx Smart BMS has a continuous current rating of 500A (1000A for the M10 model) and a peak current rating of 600A (1200A for the M10 model)) for a duration of 5 minutes. Even if the Lynx Smart BMS has an overcurrent protection, make sure that the current rating is not exceeded. 4.2.1. Current rating Lynx Smart BMS The following happens in the event that the peak current limit or the 5 minute interval has been exceeded:
an overcurrent alarm will be generated ATC or ATD (depending on current direction) is disabled after a 30s delay 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. Keep in mind that if inverters or inverter/chargers are used, both the AC and the DC system will be powered from the batteries. 4.2.2. Fusing The Lynx Smart BMS is not a system fuse. It only warns when the current is too high. Fusing needs to be done externally, for example 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. 4.2.3. 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 our book, Wiring Unlimited . System Design considerations and examples Page 6 Voltage vs. Current 12V 24V 48V 500A 6kW 12kW 24kW 1000A 12kW 24kW 48kW