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Victron Lynx Shunt VE.Can Manual

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Last update: 2020-01-12 12:42 dc_distribution https://www.victronenergy.com/live/dc_distribution
https://www.victronenergy.com/live/ Printed on 2020-01-13 03:06
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FAQ
Q - There is a small 4-pin cable shipped with the Distributor - I can only assume that the cable
interconnects between the Shunt and Distributor?
A - Yes, but this has only to power the LEDs on the distributor, there is no other function for this at the
moment.
Q - The Distributor has a DIP switch. What are the settings?
A - That’s for manual settings, please don’t touch as the system will auto configure (up to 32 battery’s
)
Q - The Distributor has a 6-pin header block. What is it for?
A - In the future, the read out of fuses, but this is not supported yet.
Why Fuse the Bus?
Batteries are special. They are both a source and destination of energy.
Power can flow from them to a load (or a fault). It can also flow to them from a charge source (eg
other batteries or solar).
It is important that in cases where batteries are combined, and there is the opportunity for current to
flow from one connection to another in fault, that there is sufficient and robust circuit protection.
For example, the BYD Lithium IP55 cabinets.
In this case the 4 module battery cabinets are each protected by individual 85A circuit breakers and
also collectively protected by a 125A circuit breaker at the cabinet end.
These cabinets are then connected through the Lynx Distributor, and those main battery take off
wires are connected at the Bus end by another 125A MEGA fuse.
Both the 125A circuit breaker and the 125A fuse are as close as possible to their respective sources of
current. The battery cells, where the internal wire is protected inside the cabinet. And the shared bus
bar (where current can flow from other batteries or a charge source).
This means that if there is a short circuit fault somewhere along the battery cabinet take off cable,
there is sufficient protection.
Without the 125A bus bar MEGA fuse. There is the possibility of the battery take off cables fault that
the 125A cabinet circuit breaker trips, but that the fault is continued by the supply of the other
batteries (up to their combined 375A) and this exceeds the current rating of the cable to the fault and
starts a fire.
This is an unlikely scenario, but consequences of a fire in an energy storage situation are so serious
that it is a recommended level of protection.
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