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Victron energy MultiPlus-II Manual
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Victron energy MultiPlus-II Manual

Victron energy MultiPlus-II Manual

External transfer switch
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MultiPlus-II external transfer switch manual
Contents
Introduction ............................................................................................................................ 2
Requirements and compatibility .......................................................................................... 2
Additional hardware requirements ....................................................................................... 2
Single line diagram ............................................................................................................... 3
Warnings ............................................................................................................................. 3
Installation .............................................................................................................................. 4
External transfer switch........................................................................................................ 4
Ground relay ........................................................................................................................ 4
Current transformers ........................................................................................................... 4
AC Wiring ............................................................................................................................. 5
Wiring diagram ........................................................................................................................ 6
Venus OS ............................................................................................................................. 8
Troubleshooting ...................................................................................................................... 9
Revision 3
2024-06-20

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Summary of Contents for Victron energy MultiPlus-II

  • Page 1: Table Of Contents

    MultiPlus-II external transfer switch manual Contents Introduction ..........................2 Requirements and compatibility ..................2 Additional hardware requirements ..................2 Single line diagram ....................... 3 Warnings ..........................3 Installation ..........................4 External transfer switch......................4 Ground relay ........................4 Current transformers ......................4 AC Wiring ..........................

  • Page 2: Introduction

    This solution is intended for generator-based systems only and cannot be used with grid-tied systems as it is not certified for such use. Requirements and compatibility Compatible with all MultiPlus-II models rated 5000VA and above. • • Maximum number of units is 12, 4 per phase. Maximum systems size is this 180kVA.

  • Page 3: Single Line Diagram

    See the appendix for the full-size connection diagrams. Warnings Parallel and Multiphase systems are complex. We do not support or recommend that untrained and/or inexperienced installers work on these size systems. Double-check the wiring before the system's initial power-up. Wiring mistakes can damage the MultiPlus-II units.

  • Page 4: Installation

    External transfer switch Use a Schneider LC1G3304 TeSys Giga, 4-pole (4NO), AC-1 <=440V 440A contactor Connect the coil directly to the NO and COM terminals of the MultiPlus-II "AUX RELAY" of the L1 phase master unit. Do not use a different contactor, as closing and opening times differ per brand and model.

  • Page 5: Ac Wiring

    AC Wiring In this application, inverter current flows through the AC outputs of the MultiPlus-II units, so the external transfer contactor wiring diameter must be appropriately sized and symmetrical. Protect the AC output wiring with a circuit breaker suitable for the expected load and wire gauge.

  • Page 6: Wiring Diagram

    Wiring diagram input (See full size diagrams in the appendix) Configuration Install S99 VE.Bus firmware The external transfer switch application requires special VE.Bus firmware, identified by the “.S99” subversion number. Download the xxxyy.S99.vff file from https://professional.victronenergy.com/ Install it using VEFlash, the VictronConnect app, or via the VRM Portal. Make sure to select the xxxyy.S99.vff file.

  • Page 8: Ve Configure

    With the correct “S99” firmware version, this setting is located in the “General” tab, as shown below. Currently, 100A and 400A current sensors are supported. For all connected MultiPlus-II units, configure the grid codes in the “Grid” tab to be the same. Select “None” as the grid code.

  • Page 9: Troubleshooting

    Troubleshooting If the system exhibits strange behavior, check the following: • Ensure the orientation of the current transformers is correct; the arrow on the CT should align with the direction of the arrow in the drawing: points from generator to the contactor. •...
  • Page 10 External transfer switch conceptual diagram AC measurement wiring, connected to the AC-in VE.Bus VE.Bus terminals Power wiring, connected to The AC-out terminals External transfer Generator switch Loads CTs & voltage- measurements Rev 1.1...
  • Page 11 External transfer switch with 230Vac coil, driven by the MultiPlus-II programmable relay Help relay, driven by the external ground relay output of the MultiPlus-II. (24V, 200mA max) Ground relay Additional MultiPlus-II units can be paralleled in each phase with only their AC outputs and the VE.Bus cables connected...