User Tools

Site Tools


ve.bus:manual_parallel_and_three_phase_systems

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
ve.bus:manual_parallel_and_three_phase_systems [2019-10-01 13:33]
guy_stewart
ve.bus:manual_parallel_and_three_phase_systems [2020-05-15 12:43] (current)
guy_stewart [Theory and background information]
Line 17: Line 17:
 This should be considered essential before attempting design or installation.   This should be considered essential before attempting design or installation.  
  
-First get experience with smaller systems. Start with single phase single unit, so that you are already familiar with the necessary equipment and software required.+First get experience with smaller systems. If you are new to Victron, please start with simpler designs, so that you become familiar with the necessary training, equipment and software required.
  
 It is also recommended to hire an installer that has experience with these more complex Victron systems, for both the design and the commissioning. It is also recommended to hire an installer that has experience with these more complex Victron systems, for both the design and the commissioning.
Line 44: Line 44:
 Also beware of sizing the battery cable and jumpers between cells/batteries. Also beware of sizing the battery cable and jumpers between cells/batteries.
  
-For units in parallel: Both the DC and AC wiring needs to be symmetrical per phase: use the same length, type and cross-section to every unit in the phase. To make this easy, use a bus-bar or power-post before and after the inverter/chargers.+For units in parallel: Both the DC and AC wiring needs to be symmetrical per phase: use the same length, type and cross-section to every unit in the phase. To make this easy, use a bus-bar or power-post before and after the inverter/chargers. Also, apply the same torque on all connections.
  
-For units in parallel: use one AC fuse for all units on that phaseBoth on the input, and on the outputMultiple fuses which are mechanically connected together is ok: that is also one fuse.+With regards to AC fusing, each unit needs to be fused individuallyMake sure to use the same type of fuse on each unit due to same resistanceConsider using mechanically connected fuses.
  
-For DC, one fuse per phase is bestIf a big single fuse is not available, use one fuse per unit. Same type of fuse due to same resistance.+With regards to DC fusingeach unit needs to be fused individuallyMake sure to use the same type of fuse on each unit due to same resistance.
  
-Beware of phase rotation between the inverter and AC in. When wired in the wrong rotation, the system will not accept the mains input and only operates in inverter mode. In that case swap two phases to correct it.+For both AC and DC fusing and protection, consult the product manual for details and recommended ratings. 
 + 
 +Beware of phase rotation between the inverter and AC in. When wired in rotation that is different to the programming of the Multis, the system will not accept the mains input and only operates in inverter mode. [[https://www.victronenergy.com/live/ccgx:start#phase_rotation_warning|If a GX device is connected, it will signal a phase rotation alarm]]. In that case swap two phases to correct it, or re-program the units to match the wiring rotation
  
 Note: Do not over-dimension the AC cabling. Using extra thick cabling has negative side effects.\\ Note: Do not over-dimension the AC cabling. Using extra thick cabling has negative side effects.\\
Line 57: Line 59:
       * Using the same 2 units in parallel with bad AC cabling one might end up with a total resistance for Unit_A of 15Ω and a total resistance for Unit_B of 16Ω. This results in a much better current distribution (Unit_A will carry 1.066 times more current than Unit_A) even if the absolute difference in resistance is much bigger than in the previous example (1Ω vs 0.0001Ω).       * Using the same 2 units in parallel with bad AC cabling one might end up with a total resistance for Unit_A of 15Ω and a total resistance for Unit_B of 16Ω. This results in a much better current distribution (Unit_A will carry 1.066 times more current than Unit_A) even if the absolute difference in resistance is much bigger than in the previous example (1Ω vs 0.0001Ω).
  
 +For units in 3 phase configuration: Our products have been designed for a star (Y) type three phase configuration. In a star configuration all neutrals are connected, a so called: "distributed neutral"
 +We do not support a delta (Δ) configuration. A delta configuration does not have a distributed neutral and will lead to certain inverter features not operating as expected. 
 ==== A continuous, unbroken negative link must be maintained between all units ==== ==== A continuous, unbroken negative link must be maintained between all units ====
  
Line 65: Line 69:
 If units need to be isolated at both poles, or local wiring requirements demand double pole isolation for each unit, the communications cables must be removed first AND appropriate safety signage needs to clearly explain this. If units need to be isolated at both poles, or local wiring requirements demand double pole isolation for each unit, the communications cables must be removed first AND appropriate safety signage needs to clearly explain this.
  
-Double pole isolation of the system is allowed (and sometimes required), as long as it at the battery connection end of the DC bus, and the Quattros remain with continuous negative between themselves.+Double pole isolation of the system is allowed (and sometimes required), as long as it at the battery connection end of the DC bus, and the Multis/Quattros remain with continuous negative between themselves.
  
  
-Theory and background information on wiring is further explained in these presentations:+==== Theory and background information ====  
 + 
 +Wiring is further explained here:
   * {{:ve.bus:4._ripple_in_a_ac_battery_system.pdf|presentation - DC Ripple}}   * {{:ve.bus:4._ripple_in_a_ac_battery_system.pdf|presentation - DC Ripple}}
   * {{:ve.bus:rva_-_theory_on_wiring_large_systems.pdf|presentation - Theory on wiring large systems}}'   * {{:ve.bus:rva_-_theory_on_wiring_large_systems.pdf|presentation - Theory on wiring large systems}}'
Line 96: Line 102:
 The following settings need to be made in the master of each phase: The following settings need to be made in the master of each phase:
   * Inverter output voltage   * Inverter output voltage
-  * Input current limits.\\ This makes it possible to set a different input current limit per phase. Note thatsimilar to the maximum charge currentthe input current limit used by the system is multiplied by the number of units in the system.\\ (This multiplication is done automatically when using a remote panel to adjust the input current limit.)+  * Input current limits\\ (the effective input current limit is the setted limit multiplied by the number of units per phase. For examplesetting a 10A limit with VEConfigure in a system with two units per phase results on a 20A limit for that phase. Being able to set a different limit per phase allows for maximum configurability.\\ \\ Setting an input current limit works differently when setting the AC input current limit on a remote control panel, for example a DMC or GX device. Then (a) only one value can be set by the user, not one per phase, and (b) the configured limit will be used as the limit per phase. The difference is due to the different use case of both ways of setting it: settings in VEConfigure are supposed to be fixed in the install and done be the installer, for example matching an installed generator. And the input current limit as set on the GX device is intended to be set by the end-user, for example on a yacht or in a motor home, and being able to set it depending on the actual shore connection - and ofcourse without having to do the maths of multiplying with the number of installed units on a phase.)
   * UPS function on/off   * UPS function on/off
   * PowerAssist settings   * PowerAssist settings
Line 103: Line 109:
   * Country / grid code standard and other grid related values (AC high/ low values)   * Country / grid code standard and other grid related values (AC high/ low values)
   * DC input low shut-down values.   * DC input low shut-down values.
 +
 +Charger settings (voltage and current limits) are overridden if DVCC is configured and if a CANBus BMS is active in the system.
  
 A quick way to make settings in all units is the 'send to all units' feature. You'll see the option after making the changes to the first unit. A quick way to make settings in all units is the 'send to all units' feature. You'll see the option after making the changes to the first unit.
Line 111: Line 119:
  
 ==== Assistants ==== ==== Assistants ====
-  All self-consumption Assistants, Hub-1 to Hub-4, need to be loaded into each unit in the system.\\ + 
 +Assistants can be used to expand the potential configuration options of your system, and are required in some installation types. When using assistants with multiple units, some assistants are required to be loaded onto all units in the system individually, and some assistants are able to be just loaded onto some or one of the units. 
 + 
 +  If you are using a self-consumption assistant, such as ESS, Hub-1 to Hub-4, the assistant will need to be loaded into each unit in the system individually.\\ 
   * PV Inverter Assistant needs to be loaded into each unit in the system.   * PV Inverter Assistant needs to be loaded into each unit in the system.
   * The VE.Bus BMS and the Two-Signal BMS support Assistant also need to be loaded in each unit in the system.   * The VE.Bus BMS and the Two-Signal BMS support Assistant also need to be loaded in each unit in the system.
Line 119: Line 130:
  
 Tip: a quick way to load Assistants into each unit in the system is to save the settings after configuring the master in L1. Then open VEConfigure for another unit and load that file. VEConfigure will automatically adapt the Assistants for the slaves. (note: In some cases you might get some warnings. Please step through the assistant in that case.) Tip: a quick way to load Assistants into each unit in the system is to save the settings after configuring the master in L1. Then open VEConfigure for another unit and load that file. VEConfigure will automatically adapt the Assistants for the slaves. (note: In some cases you might get some warnings. Please step through the assistant in that case.)
- 
 ===== Tips and hints ===== ===== Tips and hints =====
   * {{:ve.bus:4._ripple_in_a_ac_battery_system.pdf|presentation - DC Ripple}}   * {{:ve.bus:4._ripple_in_a_ac_battery_system.pdf|presentation - DC Ripple}}
Line 127: Line 137:
   * Use the help-file in VEConfigure, and also in VE.Bus Quick Configure and VE.Bus System Configurator.   * Use the help-file in VEConfigure, and also in VE.Bus Quick Configure and VE.Bus System Configurator.
  
-==== System Monitoring ====+===== System Monitoring =====
 It is strongly recommended that a [[venus-os:start|GX Family Product]] is used in conjunction with these larger systems. They provide highly valuable information on the history and performance of the system. System notifications are clearly presented and [[https://www.victronenergy.com/panel-systems-remote-monitoring/color-control|many additional functions]] are enabled. It is strongly recommended that a [[venus-os:start|GX Family Product]] is used in conjunction with these larger systems. They provide highly valuable information on the history and performance of the system. System notifications are clearly presented and [[https://www.victronenergy.com/panel-systems-remote-monitoring/color-control|many additional functions]] are enabled.
 Data from [[http://vrm.victronenergy.com|VRM]] will greatly speed support if it is required. Data from [[http://vrm.victronenergy.com|VRM]] will greatly speed support if it is required.
  
-===== DISQUS ===== +===== Training Video ===== 
-~~DISQUS~~+ 
 +There is an advanced training video and competency exam for 3 phase and parallel installation and commissioning available on [[https://professional.victronenergy.com|Victron Professional -> Online Training.]] You will require an installer account on Victron Professional to access it. 
 + 
ve.bus/manual_parallel_and_three_phase_systems.1569929612.txt.gz · Last modified: 2019-10-01 13:33 by guy_stewart