Differences

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--- dc_distribution [2019-10-19 03:15] – [Customer Images] guy_stewart
+++ dc_distribution [2019-10-19 12:42] – [Lynx Power in] guy_stewart
@@ Line 19: / Line 19: @@
 {{:drafts:lynx_power_in.png?200|}}{{https://www.victronenergy.com/upload/products/cat-122015Lynx%20power%20in%20(top_open).png?200}}
-The lynx power in module is used to connect batteries. It contains a negative and positive DC bus-bar with M8 bolts in which to connect batteries cables.
+The lynx power in module is used to connect batteries via an external fuse. It can be useful if you have multiple parallel strings. Due the extremely high short circuit current potential of most battery banks, it is suggested to use an external fuse system with an appropriate fault current interruption rating (such as an NH HRC).
+The Power In contains a negative and positive DC bus-bar with M8 bolts in which to connect batteries cables. It can take cables up to 22 mm in diameter though the bottom entry guides, and no limit via the two side connections.
 ===== Lynx shunt =====
 {{:drafts:lynx_shunt.png?200|}}{{https://www.victronenergy.com/upload/products/cat-100122Lynx%20Shunt%20VE.Can%20VE.NET%20inside.png?200}}
@@ Line 52: / Line 53: @@
 A - There is a program available to change this but as the default is 0, which is the same as what a CCGX reads we would not advise changing this!!
-==== 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.
@@ Line 95: / Line 70: @@
 A future upgrade is planned to also send info back to the GX device over the VE-can, but is not yet implemented.
 ==== Fuses ====
 Uses MEGA fuses. Please note that some MEGA fuses are only rated to 36Volt (suitable for 24V systems), You must use 58/64V rated fuses for 48V systems.
@@ Line 118: / Line 94: @@
 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.
@@ Line 145: / Line 146: @@
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