Multi-Unit System Design Guide - Schneider Electric

1 Multi-Unit power Systems Design Guide Revision C 6-2016 Copyright 2016 Schneider Electric . All Rights Reserved. All trademarks are owned by Schneider Electric Industries SAS or its affiliated for DocumentationUNLESS SPECIFICALLY AGREED TO IN WRITING, SELLER(A)MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY TECHNICAL OR OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION;(B)ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR EXPENSES, WHETHER SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION. THE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER S RISK; AND(C)REMINDS YOU THAT IF THIS MANUAL IS IN ANY LANGUAGE OTHER THAN ENGLISH, ALTHOUGH STEPS HAVE BEEN TAKEN TO MAINTAIN THE ACCURACY OF THE TRANSLATION, THE ACCURACY CANNOT BE GUARANTEED.

2 APPROVED CONTENT IS CONTAINED WITH THE ENGLISH LANGUAGE VERSION WHICH IS POSTED AT Number: 975-0739-01-01 Revision: Revision CDate: 6-2016 Contact Information contact your local Schneider Electric Sales Representative or visit the Schneider Electric website at: Revision Ciii About This GuidePurposeThe purpose of this Design Guide is to provide general information on designing a Conext XW+ Multi-Unit power System using two to nine Conext XW+ inverter/chargers in combination with other power devices like the Conext CL, Conext RL, Conext ComBox, MPPT Solar Charge Controllers and Balance of System (BOS) Guide outlines Design considerations and contains supportive information on Design concepts. It does not contain specific instructions on how to build a Multi-Unit power System .

3 However, in Configurations Supported By Multi-Unit XW+ System on page 2 7, the six sections of commissioning steps for each major configuration serve as definitive guidelines to follow when employing such information provided in this Guide does not modify, replace, or waive any instruction or recommendations described in the product installation and owner s guides including warranties of Schneider Electric products. Always consult the installation and owner s guides of a Schneider Electric product when installing and using that product in an XW+ Multi-Unit power help in designing a power System contact your Schneider Electric Sales Representative or visit the Schneider Electric website for more information at Guide is intended for System integrators or engineers who plan to Design an XW+ Multi-Unit power System using Schneider Electric equipment.

4 The information in this manual is intended for qualified personnel. Qualified personnel have training, knowledge, and experience in: Analyzing application needs and designing PV-Hybrid Systems that include a generator. Installing electrical equipment and PV power systems (up to 1000 V). Applying all applicable compliance standards and installation codes. Analyzing and reducing the hazards involved in performing electrical This Guideiv975-0739-01-01 Revision C This Guide is focused on the performance and Design of Multi-Unit power Systems. It is expected that the reader has prior knowledge of performances and features of other Schneider Electric products which are installed and integrated into the System . All of this information are found in the following documents: Conext XW+ Owner s Guide : 975-0713-01-01 and 975-0240-01-01 Conext XW+ Installation Guide : 975-0714-01-01 and 975-0239-01-01 MPPT Charge/Controller Owner s Guide : 975-0400-01-01 and 975-0560-01-01 AGS Owner s Guide : 975-0307-01-01 Battery Monitor Owner s Guide : 975-0691-01-01 Xanbus Network Sizing Guide : 975-0646-01-01 Multi-Cluster System Planning Guide : 975-0648-01-01 AC Coupling Solution Guide .

5 976-0240-01-01 Conventions UsedThe following conventions are used in this InformationYou can find more information about Schneider Electric as well as its products and services at indicates an imminently hazardous situation, which, if not avoided, will result in death or serious indicates a potentially hazardous situation, which, if not avoided, can result in death or serious indicates a potentially hazardous situation, which, if not avoided, can result in moderate or minor indicates important information that you need to read Revision Cv 1 IntroductionConext Multi-Unit power System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 2 Applications of a Multi-Unit power System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 3 Types and power Ratings of XW+ Multi-Unit power Systems - - - - - - - - - - - - - - - - - - - - - - - 1 3 Multi-Unit Inverter System Structure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 4 Xanbus - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 4 Master

6 / Slave - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 42XW+ Multi-Unit power SystemElectrical Architecture - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 2 Limitations of the XW+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 2 Output power Rating Limit of the System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 2 Hardware Limitation: Maximum Current Rating of the Internal Relay - - - - - - - - - - - - - - - 2 3 Product Compatibility - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 6 Xanbus Network Size - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 6 Configurations Supported By Multi-Unit XW+ System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 7 Configuration Tree - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 8 Configuration 1 (External Transfer Switch)

7 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 9 Electrical Configuration and power Ratings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 9 Commissioning of Configuration 1 (External Transfer Switch) - - - - - - - - - - - - - - - - - - - 2 11 Configuration 2 (With AC Source) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 13 Electrical Configuration and power Ratings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 13 Commissioning of Configuration 2 (With AC Source) - - - - - - - - - - - - - - - - - - - - - - - - - 2 14 Configuration 3 (Without AC Source) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 16 Electrical Configuration and power Ratings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 16 Commissioning of Configuration 3 (Without AC Source) - - - - - - - - - - - - - - - - - - - - - - - 2 17 Configuration 4 (External Contactor) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 19 Electrical Configuration and power Ratings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 19 External Contactor Control (AC Contactor) in Three-phase Multi-Cluster - - - - - - - - - - - 2 21 Commissioning of Configuration 4 (External Contactor)

8 - - - - - - - - - - - - - - - - - - - - - - - 2 23 Configuration 5 (3Ph AC Source) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 26 Electrical Configuration and power Ratings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 26 Commissioning of Configuration 5 (3Ph AC Source) - - - - - - - - - - - - - - - - - - - - - - - - - - 2 27 Configuration 6 (Without 3Ph AC Source) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 29 Electrical Configuration and power Ratings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 29 Commissioning of Configuration 6 (Without 3Ph AC Source) - - - - - - - - - - - - - - - - - - - - 2 30 ContentsContentsvi975-0739-01-01 Revision C 3 Design of Multi-Unit power SystemsHow To Identify Multi-Unit power System Project Needs - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3 2 Components of a Modular XW+ Multi-Unit power System - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3 9 AXW+/XW Inverter/Charger Multi-Unit AC Output Voltage Configuration and Cali-brationAudience- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A 2 Prerequisites - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A 2 Procedure.

9 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A 2 Calibration without Load - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A 2 Calibration with Load ( power Sharing/Balancing) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A 6 BAC Combiner BoxIntroduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B 2AC Combiner Box Control Schematic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B 3AC Combiner Box - 9 for North America- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B 4AC Combiner Box - 9 for IEC- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B 5 List of Components from Schneider Electric to Build the AC Combiner Box - - - - - - - - - - - - - - - B 6975-0739-01-01 Revision C1 1

10 1 IntroductionChapter 1 contains information about: Conext Multi-Unit power System Applications of a Multi-Unit power System Types and power Ratings of XW+ Multi-Unit power Systems Multi-Unit Inverter System StructureIntroduction1 2975-0739-01-01 Revision C Conext Multi-Unit power SystemA Multi-Unit power System is a group of battery-based XW+ inverter/chargers and related devices which are physically assembled together, electrically connected together, and configured to operate as a single power objective of the grouping is to create a power System capable of supplying more power than what can be provided by a single inverter. Multi-Unit power System can be used as a grid-tie power backup equipment or as primary power sources for off-grid sites.