STRCOM Installation and Operation Manual
Contents
1. UL 1741 1st Edition May 7th 1999 Including Revisions through November 7 2005 UL Standard for Safety for Panelboards UL 67 11th Edition December 8 1993 Including Revisions STRCOM YY X ZZ A for negatively grounded systems and STRCOM YY X ZZ A P for positively grounded systems Models Where YY is the number of circuits 4 30 ZZ is the individual circuit fuse rating 8 10 12 15 or 20 ATM for Report 3143732CRT 004 Page 1 of 1 ATM Issued 09 Dec 2009 ED 16 3 1 1306 intarradve DOC 020040 rev 4 4 232. WHERE PERMITTED BY LAW IN LIEU OF ALL OTHER WARRANTIES CONDITIONS GUARANTEES REPRESENTATIONS OBLIGATIONS AND LIABILITIES EXPRESS OR IMPLIED STATUTORY OR OTHERWISE IN CONNECTION WITH THE PRODUCT HOWEVER ARISING WHETHER BY CONTRACT TORT NEGLIGENCE PRINCIPLES OF MANUFACTURER S LIABILITY OPERATION OF LAW CONDUCT STATEMENT OR OTHERWISE INCLUDING WITHOUT RESTRICTION ANY IMPLIED WARRANTY OR CONDITION OF QUALITY DISTRIBUTOR OR DEALER INSTALLER ABILITY OR FITNESS FOR A PARTICULAR PURPOSE ANY IMPLIED WARRANTY OF DISTRIBUTOR OR DEALER INSTALLER ABILITY OR FITNESS FOR A PARTICULAR PURPOSE TO THE EXTENT REQUIRED UNDER APPLICABLE LAW TO APPLY TO THE PRODUCT SHALL BE LIMITED IN DURATION TO THE PERIOD STIPULATED UNDER THIS LIMITED WARRANTY IN NO EVENT WILL SOLECTRIA RENEWABLES LLC INCLUDING ITS SUPPLIERS MANUFACTURERS VENDORS SUBCONTRACTORS DISTRIBUTORS DEALERS AND ANY OTHER AFFILIATES BE LIABLE FOR ANY SPECIAL DIRECT INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES LOSSES COSTS OR EXPENSES HOWEVER ARISING WHETHER IN CONTRACT OR TORT INCLUDING WITHOUT RESTRICTION ANY ECONOMIC LOSSES OF ANY KIND ANY LOSS OR DAMAGE TO PROPERTY ANY PERSONAL INJURY ANY DAMAGE OR INJURY ARISING FROM OR AS A RESULT OF ANY USE MISUSE OR ABUSE OR THE IN CORRECT INSTALLATION INTEGRATION OR OPERATION OF THE PRODUCT Solectria Renewables neither assumes nor authorizes any other person to assume for it any other liability in connection with the repair or repla
3. 1 lug 12 10 AWG 20 in lb 1 lug 8 AWG 25 in lb 1 lug 6 4 AWG 35 in lb and 1l 6AWG 2 0 50 in lb 13 30 fuse 50 2 lug 14 12 AWG 25 in lb or 25 1 lug 12 10 AWG 20 in lb 1 lug 8 AWG 25 in lb 1 lug 6 4 AWG 35 in lb and e 6AWG 2 0 50 in lb and 2 6AWG 250KCM 275 in lb Lightning and Surge Protection The inverter used with the PV system must be listed to UL1741 IEEE1547 and include required lightning and surge protection It 1s a good practice to add additional lightning and surge protection on inverter or system DC disconnects The lightning arrester can also be installed on the combiner but must be done in a way that maintains the NEMA4 rating of the combiner if outdoors Lightning arrester leads should be connected to l a ground bar terminal 2 a lug on the inverter side of the positive fuse bus you need to add an appropriate lug for this to an available hole on the fuse bus 3 one of the array terminal screws on the negative terminal block Grounding Electrode Conductor As with all PV systems a Grounding Electrode Conductor must be installed per UL690 47 and 250 166 This conductor should be sized according to these NEC requirements To disconnect the inverter from the building utility grid turn off the DC disconnect then the AC disconnect Turn off the AC 3 phase building utility breaker if needed DOC 020040 rev 4 4 12 STRCOM Fused String Combiners Installation and Operation Manual Re
4. Renewables Limited Warranties are provided by Solectria Renewables LLC Solectria Renewables and cover defects in workmanship and materials Duration of a Solectria Renewables Warranty Period The warranty period is 60 months from the date of purchase of the SRTCOM Fused String Combiners by the end user or 64 months after the delivery date from Solectria Renewables to distributor or dealer installer whichever is shorter If a warranty extension has been purchased the term is defined as extension beyond 60 months For example if a 5 year extension to 10 years total is purchased the term becomes 120 months from date of purchase If Solectria Renewables repairs or replaces a product its warranty continues for the remaining portion of the original Warranty Period or 90 days from the date of the return shipment to the customer whichever is greater DOC 020040 rev 4 4 16 STRCOM Fused String Combiners Installation and Operation Manual All warranties are null and void if full payment for products and associated shipping are not received in full and in a timely manner by Solectria Renewables Please contact Solectria Renewables Customer Service for further details on other products What will Solectria Renewables do Solectria Renewables will at its option repair or replace the defective product free of charge provided that you notify Solectria Renewables of the product defect within the Warranty Period for your product and provided
5. and probe each fuse holder on the array side and other lead of meter on negative terminal block neg grounded systems If there has been a short in a string the fuse for that string may be blown You will see this because that string will sit at open circuit voltage while all the other strings are at MPP voltage J WARNING The combiner should only be opened by qualified service technician WARNING If the combiner is outdoors only open it when the weather is clear and dry and the unit is dry To check for a weak PV string With the inverter on and the PV system running producing power Open the enclosure and probe each PV string on the array side with a current clamp If there is a weak string you will see lower current on that string A dead string will show no current at all Once you find what string has a problem you can dig into the wiring and modules for that string to find and fix the problem Ground Currents Check ground conductors for no current flowing while system is operating Before closing the enclosure always check for any signs of problems such as corrosion loose parts insect or animal infestation excessive dirt dust or over heated or deformed aged looking parts Also be sure if any wires were moved or cable ties cut that they are replaced as new 4 Product Warranty amp RMA Policy 4 1 Warranty Policy The Solectria Renewables Warranty Policy is stated below Solectria Renewables Warranty Coverage Solectria
6. can be selected for this module Example 2 PV module with 7 69A short circuit current rating and a 15A fuse rating 1 56 x 7 69A 11 996A DOC 020040 rev 4 4 10 STRCOM Fused String Combiners Installation and Operation Manual A 12 or 15A fuse can be selected for this module Example 3 PV module with 8 12A short circuit current rating and a 15A fuse rating 1 56 x 8 12A 12 667A A 15A fuse must be selected for this module Connection of Grounded Conductor Terminal Block negative conductors The grounded connection terminal block in the standard version combiner for array and inverter connections is grounded by the inverter and is not to be grounded anywhere else In the standard version of the combiner for negatively grounded systems the PV array negative and inverter negative conductors connect to this block This block is used for the positive array and inverter connections in an optional version for positively grounded systems ARRAY CONNECTIONS conductor size 8 12AWG can be used to connect to each solar array string terminal block Torque to 35 in lb INVERTER CONNECTIONS conductor size 4AWG 400KCM can be used to connect from the terminal block to the inverter Torque to 375 in lb Connection of Ungrounded Conductors for fuses positive conductors The ungrounded array conductors positive conductors in a standard negatively grounded system connect to the fuses One PV string connects to each fuse position ARRAY CONNECTIO
7. components inside the enclosure will be damaged by exposure to rain Notes regarding mounting and placement of the combiner Criteria for device mounting DOC 020040 rev 4 4 6 STRCOM Fused String Combiners Installation and Operation Manual Because the unit has a NEMA4 rating it can be mounted outdoors The combiner is designed to be mounted vertically with all the conduits entering and exiting the bottom 6 x 20 of the unit It can be mounted flat as well but pay extra attention to seals Install the combiner in an accessible location following NEC codes for enclosure and disconnect door clearances and proximity to other equipment See mounting diagram Fig 2a and 2b Although not required installation at waist or chest height allows easiest access and keeps the unit above potential snow line or drifts Installer sometimes prefer lower installation heights for aesthetics or wind loading reasons Although not required the combiner and fuses will remain most cool if the combiner is located in shade or partial shade from the array roof equipment vault walk up or other equipment on the roof J CAUTION Please follow these guidelines The combiner weight is 40 Ibs Be sure to verify load capacity of wall mounting area Allow at least 1 clearance around sides and at least 4 space at back the depth of the mounting tabs for cooling considerations in extreme conditions Be sure to leave ample space for conduits to
8. enter and exit the bottom 6 x20 of the unit Although less recommended for outdoor applications if any conduits are entering or exiting the right side for PV connections be extra careful with the installation of the NEMA4 liquid tight conduit fittings to be sure that they are very well sealed 3 8 Holes for mounting Slotted Latch s Nameplate label Listing label Warning Positive Countr y of ground origin flag option label DOC 020040 rev 4 4 7 STRCOM Fused String Combiners Installation and Operation Manual Fig 2a STRCOM Fused String Combiner Dimensional Mounting Diagram MOUNTING TABS he WALL OR D lt _ COMBINE STRUCTURE CONDUITS IN amp OUT Fig 2b STRCOM Fused Combiner Mounting Diagram side view Mounting Details Using the mounting diagram Fig 2a and 2b choose whether wall array structure or stand mounting will be used Be sure to allow NEC clearance for access to combiner The units can be mounted side to side 1f multiple combiners are being used It is recommended to use galvanized grade 5 or better bolts or stainless steel bolts The correct bolt size is 5 16 or 3 8 or 8 10mm diameter SS or galvanized steel hardware is recommended Be sure to use flat washers and lock washers If wall mounting is used be sure to verify sheer and pullout strength of anchors or other wall attachments WARNING Injury could occur if the combiner mounting fails and the unit falls on a pers
9. 0 12 15 or 20A Typically the fuse size you chose is at least 1 56 x the short circuit current rating of the PV string or module used in the string it protects The fuse value should not be more than the fuse rating listed on the module nameplate label or manual The STRCOM string combiner is available in either the standard version for use with negatively grounded PV systems or an optional version for use with positively grounded systems typically used in conjunction with Sunpower Corp modules Note that neither the positive or negative conductor is grounded in the string as this is typically done in the inverter for the system however labeling is different in the negative and positive grounded string combiner versions The STRCOM fused string combiner is rated NEMA4 for outdoor use NEMA4X Stainless Steel also available as an option It is designed and tested to be easy to mount and wire up A flat tip screwdriver is required to open the enclosure for typical rooftop applications and an optional lock kit is available if access needs to be restricted farther Photovoltaic STRCOM PVI 95KW Electrical Array Fused String Inverter Grid Combiner s Fig 1 Fused String Combiner Application DOC 020040 rev 4 4 5 STRCOM Fused String Combiners Installation and Operation Manual 2 Installation WARNING Before installing the string combiner read all instructions and caution markings in this manual and on the string combiner as well as on t
10. 10 12 15 or 20A fuses 18 Fuse String Combiner with 8 10 12 15 or 20A fuses 19 Fuse String Combiner with 8 10 12 15 or 20A fuses 20 Fuse String Combiner with 8 10 12 15 or 20A fuses 21 Fuse String Combiner with 8 10 12 15 or 20A fuses 22 Fuse String Combiner with 8 10 12 15 or 20A fuses 23 Fuse String Combiner with 8 10 12 15 or 20A fuses 24 Fuse String Combiner with 8 10 12 15 or 20A fuses 25 Fuse String Combiner with 8 10 12 15 or 20A fuses 26 Fuse String Combiner with 8 10 12 15 or 20A fuses 27 Fuse String Combiner with 8 10 12 or 15A fuses not for use with 20A fuses 28 Fuse String Combiner with 8 10 12 or 15A fuses not for use with 20A fuses 29 Fuse String Combiner with 8 10 12 or 15A fuses not for use with 20A fuses 30 Fuse String Combiner with 8 10 12 or 15A fuses not for use with 20A fuses Optional mount tab kit Four mount tabs and hardware Mount to bottom back of box in existing mounting holes in enclosure 20 STRCOM Fused String Combiners Specifications for 3 wien ean ean specific models 10X_A 15X_A 30X_A Output Continuous Operating Current 150A 280A 340A Maximum Short Circuit Current 225A 338A 675A Number of Outputs l 1 2 1 3 Voltage Range 0 600VDC Wire Sizes 4AWG 1 0 1 0 250KCM 350KCM 350KCM dual wire dual wire capable lug capable lug Monopole neg ground systems pos ground opt Monopole neg ground systems pos ground o
11. 40 rev 4 4 19 STRCOM Fused String Combiners Installation and Operation Manual The open circuit voltage of PV modules depends on the cell temperature and the solar irradiation The highest open circuit voltage occurs when the PV modules are at the coldest temperature and in bright sun Part Number scheme STRCOM 10X15A P if for use with positively grounded PV systems Number of fuse positions Current Rating of 600VDC fuses included STRCOM Fused String Combiner Configurations STR COM 4X__ A STR COM 6X__ A STR COM 8X A STR COM 10X__ A STR COM 12X A STR COM 13X A STR COM 14X A STR COM 15X A STR COM 16X A STR COM 17X A STR COM 18X A STR COM 19X A STR COM 20X A STR COM 21X A STR COM 22X A STR COM 23X A STR COM 24X A STR COM 25X A STR COM 26X A STR COM 27X A STR COM 28X A STR COM 29X A STR COM 30X A Optional Mount Tab Kit DOC 020040 rev 4 4 4 Fuse String Combiner with 8 10 12 15 or 20A fuses 6 Fuse String Combiner with 8 10 12 15 or 20A fuses 8 Fuse String Combiner with 8 10 12 15 or 20A fuses 10 Fuse String Combiner with 8 10 12 15 or 20A fuses 12 Fuse String Combiner with 8 10 12 15 or 20A fuses 13 Fuse String Combiner with 8 10 12 15 or 20A fuses 14 Fuse String Combiner with 8 10 12 15 or 20A fuses 15 Fuse String Combiner with 8 10 12 15 or 20A fuses 16 Fuse String Combiner with 8 10 12 15 or 20A fuses 17 Fuse String Combiner with 8
12. NS conductor size 8 12AWG can be used to connect to each solar array string fuse holder Torque to 18 22 in lb INVERTER CONNECTIONS conductor size 6A WG 350KCM can be used to connect from the terminal block to the inverter depending on string combiner version of wire String Combiner Version positions Wire size Torque 4 12 fuse l 6AWG 250KCM 275 in lb 13 24 fuse l 4 0 350KCM 340 in lb or 2 1 0 250KCM 340 in lb 25 30 fuse l 6AWG 250KCM 275 in lb and 1l 4 0 350KCM 340 in lb or 2 1 0 250KCM 340 in lb Conduit Entrance locations It is recommended that PV array string conductor conduit s enter the lower right corner of the combiner enclosure on the bottom or right wall Array conduit s can also enter anywhere on the right side or top right corner of the enclosure but to maintain the NEMA4 rating of the combiner NEMA4 rated liquid tight conduit connectors must be used It is recommended that the conduit s to the inverter s exit the center of the enclosure bottom Grounding Conductors The array frame and mounting structure equipment ground conductors should be terminated on the ground bar provided in the combiner There are several connection DOC 020040 rev 4 4 11 STRCOM Fused String Combiners Installation and Operation Manual points for array equipment ground conductors depending on the string combiner model String Combiner Version positions wire Size Torque 4 12 fuse 30 2 lug 14 12 AWG 25 in lb or 15
13. STRCOM Fused String Combiners Installation and Operation Manual s SOLECTRIA RENEWABLES STRCOM INSTALLATION AND OPERATION MANUAL Fused String Combiners 2011 Solectria Renewables LLC C US Subject to Change Intertek DOC 020040 rev 4 4 l STRCOM Fused String Combiners Installation and Operation Manual IMPORTANT SAFETY INSTRUCTIONS This manual contains important instructions that shall be followed during installation and maintenance of the STRCOM Fused String Combiners To reduce the risk of electrical shock and to ensure the safe installation and operation of the combiner the following safety symbols are used to indicate dangerous conditions and important safety instructions WARNING This indicates a fact or feature very important for the safety of the user and or which can cause a serious hardware damage if not applied appropriately Use extreme caution when performing this task NOTE This indicates a feature that is important either for optimal system set up or operation EXAMPLE This indicates an example POS Positive connection point symbol NEG Negative connection point symbol GROUND Ground symbol D00 J DC DC electrical connection point symbol SAVE THESE INSTRUCTIONS DOC 020040 rev 4 4 2 STRCOM Fused String Combiners Installation and Operation Manual IMPORTANT SAFETY INSTRUCTIONS e All electrical installations shall be done in accordance with the local and
14. a Renewables products are not intended for use in connection with life support systems and Solectria Renewables makes no warranty or representation in connection with any use of the product for such purposes Please review our Return Merchandise Authorization Policy for returning product to Solectria Renewables DOC 020040 rev 4 4 18 STRCOM Fused String Combiners Installation and Operation Manual 4 3 Return Material Authorization Policy Please review our Return Merchandise Authorization Policy below after reviewing our Solectria Renewables Warranty Policy Obtaining a required Return Material Authorization Before returning a product directly to Solectria Renewables you must obtain a Return Material Authorization RMA number and the correct factory Ship To address Products must also be shipped prepaid Product shipments will be refused and returned at your expense if they are unauthorized returned without an RMA number clearly marked on the outside of the shipping box if they are shipped collect or if they are shipped to the wrong location Information Solectria Renewables needs when you are obtaining service 1 The model names and serial number of your product 2 Information about the installation and use of the unit 3 Information about the failure and or reason for the return 4 A copy of your dated proof of purchase Preparing the product for shipping 1 Package the unit safely preferably using the original box and packi
15. cement or the Product Exclusions of the Policy If your product is a consumer product federal law does not allow an exclusion of implied warranties To the extent you are entitled to implied warranties under federal law to the extent permitted by applicable law they are limited to the duration of this Limited Warranty Some states and provinces do not allow limitations or exclusions on implied warranties or on the duration of an implied warranty or on the limitation or exclusion of incidental or consequential damages so the above limitation s or exclusion s may not apply to you This Limited Warranty gives you specific legal rights You may have other rights which may vary from state to state or province to province WITHOUT LIMITING THE GENERALITY OF THE FOREGOING UNLESS SPECIFICALLY AGREED TO BY IT IN WRITING SOLECTRIA RENEWABLES a MAKES NO WARRANTY AS TO THE ACCURACY SUFFICIENCY OR SUITABILITY OF ANY TECHNICAL OR OTHER INFORMATION PROVIDED IN MANUALS OR OTHER DOCUMENTATION PROVIDED BY IT IN CONNECTION WITH THE PRODUCT AND 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 WARNING LIMITATIONS ON USE Please refer to your product user manual for limitations on uses of the product Specifically please note that Solectri
16. checking the voltage at each fuse holder on the array side Itis best to open all the fuse holders BEFORE connecting the PV strings or uncovering the PV modules e With all the fuses open check each string for voltage and polarity by attaching negative for a neg grounded system lead of a 6 00VDC rated voltmeter to the negative terminal block in the combiner and positive in a pos grounded system lead to each fuse holder on the array side e You should see very slightly different DC voltages from each string assuming light no significant shadows are on the array The polarity should be checked to be correct on all strings as well e Close all the fuse holders Operation and tests Once the string voltages and polarities have all been checked it is good to check the polarity at the inverters DC disconnect also for correct polarity then turn on the inverter DOC 020040 rev 4 4 15 STRCOM Fused String Combiners Installation and Operation Manual You should see the open circuit voltage of the array drop to roughly 75 80 once the inverter starts to load the array to MPP Check the current level of each string when the system 1s operating This can be done with a clamp on amp meter DC Assuming constant sun intensity is on all the strings the current output should be similar for each string within 5 10 for example To check for an open PV string With the inverter on and the PV system running producing power open the enclosure
17. e conductor to inverter Can be 4AWG 350KCM or 2 wires at 1 0 250KCM Representative positive PV string conductors 10 8SAWG Example positive conductor to inverter Both can be 1 0A WG 250KCM or one at 6A WG 250KCM STRCOM Fused String Combiners Installation and Operation Manual J WARNING Fuses in fused combiner must only be replaced with the same make and model fuse KLKD8 KLKD10 KLKD12 KLKD15 KLKD20 or ATM8 ATM10 ATM12 ATMI5 or ATM20 20A fuses not recommended for use in the 27 30 fuse position versions 3 Operation Tests amp Commissioning the PV System The string combiner is mounted all connections are made and you are ready to power it up with the rest of the PV system NOTE Make sure all tools parts etc are removed from the string combiner before connecting PV strings or uncovering modules inverter and in the system Fuse holders should be open at this point NOTE With the PV modules connected or uncovered and inverter disconnects still off it is a good final precaution to check PV polarity once more simply by carefully using a 600V DC rated digital volt meter and probing the positive and negative PV connections in the disconnect enclosure J WARNING Make a final check for correctness of all AC and DC wiring to the Checking Individual strings e With the PV inverter still off so no current is being drawn from the array through the combiner you can check that each string is good by
18. he photovoltaic modules WARNING Electrical installation shall be done in accordance with all local electrical codes and the National Electrical Code NEC ANSI NFPA 70 2 1 Checking for Shipping Damage The Combiners are thoroughly checked and tested rigorously before they are shipped Even though they are delivered boxed in a rugged cardboard carton shipped individually or on a pallet the combiners can be damaged in shipping Please inspect the combiner thoroughly after it is delivered If any damage is noticed please immediately notify the shipping company If there 1s any question about potential shipping damage contact Solectria Renewables A digital photo of the damage may be very helpful Do not accept unit if visibly damaged or note visible damage when signing shipping company receipt Report damage immediately to shipping company Do not remove the unit from pallet packaging If it is determined that the unit must be returned an RMA must be obtained from Solectria Renewables 2 2 Combiner Mounting The combiner enclosure is rated NEMA4 gasket sealed rainproof for typical mounting on a roof with the PV array Optional mounting tabs allow simple mounting to a wall array racking if allowed or to posts When unpacking remove cardboard shipping aids and tape inside enclosure gt NOTE If the combiner is mounted outside make sure the enclosure door remains closed in case of rain during the installation process The
19. minal block PV Array connections neg NEMA4 Pa Enclosure p Mounts Inverter Tabs 4 connections neg Inverter Ground Bars Door Ground Bonding wires p pi Required conduit exit locations see Fig 2c connections pos Array Fuses pos 4 30 positions PV Array connections gt P pos Fig 4 Fused String Combiner Features and Connections WARNING All electrical installations shall be done in accordance with all local electrical codes and the National Electrical Code NEC ANSI NFPA 70 WARNING Always be certain that all array strings are disconnected before working on any wiring in the string combiner WARNING Over current protection for a battery circuit is to be provided by others Battery over current protection is not provided by this string combiner Choosing correct fuse sizes for your combiner This is done when you are ordering the combiner This string combiner is available in configurations from 8 to 30 fuses The combiner also includes your choice of 600VDC rated fuses Fuses sizes can be 8 10 12 15 or 20A Typically the fuse size you chose is at least 1 56 x the short circuit current rating of the PV string or module used in the string The fuse value should not be more than the fuse rating listed on the module nameplate label or manual Example 1 PV module with 3 84A short circuit current rating and a 10A fuse rating 1 56 x 3 84A 5 990A An 8 or 10A fuse
20. national electrical codes ANSI NFPA 70 e The STRCOM Fused String Combiner contains no user serviceable parts Please contact Solectria Renewables or a Solectria Renewables authorized system installer for maintenance See Appendix C for Solectria Renewables contact information and authorized system installers e Before installing or using the STRCOM Fused String Combiner please read all instructions and caution markings in this manual and on the STRCOM Fused String Combiner unit as well as the PV modules and PV inverter or Charge Controller e Connection of the STRCOM Fused String Combiner with PV modules and a PV inverter to the electric utility grid must be done after receiving prior approval from the utility company and performed only by qualified personnel e Disconnect all PV modules or completely cover the surface of all PV arrays with opaque dark material before wiring them PV arrays produce electrical energy when exposed to light and could create a hazardous condition SAVE THESE INSTRUCTIONS DOC 020040 rev 4 4 3 STRCOM Fused String Combiners Installation and Operation Manual Table of Contents E WAU O GUC OM E E ie ease ee oases eee ee ee EA 5 2 UMStallanOMm a rccccorehsnneochecoaeavecanse EEN NER NEE A N 6 2 1 Checking for Shipping Damage osnsunsususensusersesseserrrrerseseese 6 2 2 Combiner MOUNN eaea a a A ead iaas 6 2 3 Electrical Connection and Connection to PV Modules Inverter and Surge Lightning Pr
21. ng materials Please ensure that your product is shipped fully insured in the original packaging or equivalent This warranty will not apply where the product is damaged due to improper packaging 2 Include the following a The RMA number supplied by Solectria Renewables LLC clearly marked on the outside of the box b A return address to which the unit can be shipped Post office boxes are not acceptable c A contact telephone number where you can be reached during work hours d A brief description of the problem Ship the unit prepaid to the address provided by your Solectria Renewables customer service representative Returning a product from outside of the USA or Canada In addition to the above you MUST include return freight funds and are fully responsible for all documents duties tariffs and deposits 5 Technical Data Technical Information and specifications see appendix for complete STRCOM Fused String Combiner data sheet Input DC from PV array e Maximum open circuit voltage of PV array 600V DC WARNING NEC 690 7 must be followed to calculate the maximum number of PV modules allowed for a maximum inverter open circuit voltage OCV of 600V DC in extreme cold temperatures for the installation location Note that some inverter models have a lower maximum open circuit voltage than 600VDC for example the PVI 15KW has a 475 VDC maximum open circuit voltage e See PV string sizing charts in Appendix B DOC 0200
22. o not apply to and Solectria Renewables will not be responsible for any defect in or damage to a The product if it has been misused neglected improperly installed physically damaged or altered either internally or externally or damaged from improper use or use in an unsuitable environment b The product if it has been subjected to fire water generalized corrosion biological infestations acts of God or input voltage that creates operating conditions beyond the maximum or minimum limits listed in the Solectria Renewables product specifications including high input voltage from generators and lightning strikes DOC 020040 rev 4 4 17 STRCOM Fused String Combiners Installation and Operation Manual c The product if repairs have been done to it other than by Solectria Renewables or authorized trained service personnel d The product if it is used as a component part of a product expressly warranted by another manufacturer e The product if its original identification trademark serial number markings have been defaced altered or removed f The product if it has been damaged in shipping unless approved in writing by Solectria Renewables g Any installation and operation beyond the scope covered by relevant safety regulations UL1741 NEC etc DISCLAIMER SOLECTRIA RENEWABLES LIMITED WARRANTIES ARE THE SOLE AND EXCLUSIVE WARRANTY PROVIDED BY SOLECTRIA RENEWABLES IN CONNECTION WITH YOUR SOLECTRIA RENEWABLES PRODUCT AND ARE
23. oduct Solectria Renewables may send personnel to a jobsite or contract with an area technician installer or other authorized trained service personnel to service replace components Direct returns may be performed according to the Solectria Renewables Return Material Authorization Policy Call for details In any warranty claim dated proof of purchase must accompany the product and the product must not have been disassembled or modified without prior written authorization by Solectria Renewables Proof of purchase may be in any one of the following forms The dated purchase receipt from the original purchase of the product at point of sale to the end user or The dated distributor or dealer installer invoice or purchase receipt showing original equipment manufacturer OEM Status or The dated invoice or purchase receipt showing the product exchanged under warranty Solectria Renewables provides trouble shooting service Monday Friday 9am 6pm EST Once a problem is identified necessary replacement component s will be dispatched within 1 2 days to the jobsite or the designated service personnel s address or will be brought to the site by Solectria Renewables personnel What does the Solectria Renewables warranty not cover Solectria Renewables Limited Warranties do not cover normal wear and tear of the product or costs related to the removal installation or troubleshooting of the customer s electrical systems These warranties d
24. on NOTE Always use all 4 mounting tabs for mounting NOTE The 40 lb weight of the combiner will exert as much as 20 lbs per bolt on the 4 wall mounts Make sure an appropriate safety margin is used for both shear and tension of wall mounting bolts anchors or other attachments NOTE Do not leave enclosure door open when you are not actually working on the inside the combiner Jud DOC 020040 rev 4 4 8 STRCOM Fused String Combiners Installation and Operation Manual Inverter Conduit Array Conduit Location s Location s 11 17 19 5 20 Fig 2c STRCOM Fused Combiner Conduit Exit Location Diagram bottom view from outside enclosure In order to maintain the Type 4 rating of the enclosure you must use NEMA 4 conduit fittings For Rigid and IMC Conduit use the following Cooper Crouse Hinds Myers Watertight Hubs or equivalent A STG 1 1 1 4 STG 4 2 1 2 STG 7 Ya STG 2 1 1 2 STG 5 3 STG 8 bes STG 3 Ze STG 6 3 1 2 STG 9 Install hubs per manufacturer s instructions 2 3 DC Electrical Connections to Fused Combiner Utility N Building AC Distribution FUSED STRING COMBINER SOLECTRIA PV INVERTER Inverter Transformer DC Disconnect Switch Go G Building Loads Yote D round Fault Detection Interrupt not shown Fig 3 Simplified electrical connection diagram DOC 020040 rev 4 4 9 STRCOM Fused String Combiners Installation and Operation Manual Negative ter
25. otection iere rrna n a T ton iad dente tee E 9 3 Operation Tests and Commissioning the PV System cccccee eee eeee eee eens 14 4 Warranty Information and Liability c ccc ccc cece cece cece cent cece tense eeeenenes 15 z Lecer Oats constaiairs setae a E E esuad arse es 18 6 APPCHCICES acexanacatdenvescumodsctendheaassieeesh eeu diekee Sheaaw abcess cas R aA 21 Appendix A Product Dalasneeloniescasevectimaseerioe cides cate warehouses 21 Appendix B Example Sin SIZIN orra aE a E eenteewss 21 Appendix C Contact Info and Authorized Distributors Dealers and Installers 21 Appendix Ds ULT 4EE nCen E EINE AEEA ay 22 DOC 020040 rev 4 4 4 STRCOM Fused String Combiners Installation and Operation Manual 1 Introduction The STRCOM String Combiner is a commercial fused string combiner designed to be used for combining multiple strings of PV modules for connection to an inverter or solar charge controller With this manual the STRCOM string combiner can be installed and operated safely This installation guide is used as reference for the commissioning and as a guideline on how to use the string combiner most effectively In a large PV array each string of PV modules must be fused before being paralleled and connected to an inverter or charge controller This string combiner is available in configurations from 4 to 30 fuses The combiner includes of choice of 600VDC rated fuses Available fuses sizes can be 8 1
26. presentative negative PV string conductors 10 8A WG recommended Jumpers 2 Representative Ground lugs for 25 positive PV string conductors 10 4A WG conductors 10 or 50 14 12A WG and SAWG main lugs for up to recommended 250KCM Example positive conductors to inverter Both can be 1 0OAWG 250KCM or one at 4AWG 350KCM Example negative conductors to inverter Both can be 4A WG 400KCM Make sure wire is NOT routed near the ground lug Fig 5 STRCOM 30X__ A String Combiner Wiring and Typical Conduit Exits open showing connection DOC 020040 rev 4 4 13 STRCOM Fused String Combiners Representative negative PV string conductors 10 8AWG recommended Factory Jumper Ground lugs for 14 conductors 10 4A WG or 28 14 12A WG and main lugs for up to 250KCM Example negative conductor to inverter 1 or 2 wires can be 4AWG 400KCM Representative negative PV string conductors 10 8A WG recommended Ground lugs for 7 conductors 10 4AWG or 14 14 12A WG and main lug for up to 1 0 Example negative conductor to inverter Both can be 4A WG 400KCM Fig 6 STRCOM 15X__ A String Combiner Wiring and Typical Conduit Exits open showing connection Fig 7 STRCOM 10X__ A String Combiner Wiring and Typical Conduit Exits open showing connection DOC 020040 rev 4 4 14 Installation and Operation Manual Representative positive PV string conductors 10 8SAWG Example positiv
27. pt 600 VDC 4 6 8 10 12 113 14 15 16 25 26 27 17 18 19 20 28 29 30 01 99 93 94 4 6 8 10 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 12 8 AWG 8A 10A 12A 15A 20A 600VDC Midget Input Array Configuration Fuse positions Max Short Circuit Current Fuse positions avail in series All fuse positions available Wire size range Fuse size choices Fuse Voltage Rating Type Environmental Enclosure Rain Proof gasket sealed NEMA4 General Weight lb kg Dimensions inch mm 40 18 2 41 18 6 42 19 1 24 610 H x 20 508 W x 6 75 172 D With Optional Mounting Tabs 24 610 H x 23 584 W x 7 178 D Warranty 5 years warranty extensions available 20A fuses not for use in the 27 30A version combiners DOC 020040 rev 4 4 2l Installation and Operation Manual STRCOM Fused String Combiners Installation and Operation Manual Appendix A STRCOM Fused Combiner Data Sheet Link to brochure http www solren com downloads STRCOM_Datasheet pdf Appendix B Example PV string sizing chart s Link http www solren com stringSizing html The charts below are simplified string sizing examples Please use the charts on the website for complete charts for use across the country Appendix C Contact Information Solectria Renewables LLC 360 Merrimack Street Building 9 Lawrence Massachusetts USA Tel 978 683 9700 Fax 978 683 9702 Email inverte
28. rs solren com Website www solren com Authorized Distributors Dealers Installers Designers www solren com Specific Link http www solren com contact dist htm DOC 020040 rev 4 4 22 STRCOM Fused String Combiners Installation and Operation Manual Appendix D UL1741 IEEE1547 Certification Letter Intertek AUTHORIZATION TO MARK This authorizes the application of the Certification Markis shown below to the models described in the Product s Covered section when made in accordance with the conditions set forth in the Certification Agreement and Listing Report This authorization also applies to multiple listee model s identified on the correlation page of the Listing Report This document is the property of Intertek Testing Services and is not transferable The certification mark s may be applied only at the location of the Party Authorized To Apply Mark Applicant SOLECTRIA RENEWABLES LLC Manufacturer SOLECTRIA RENEWABLES LLC 360 Merrimack Street 360 Merrimack Street Address Bidg 9 Floor 2 Address Bidg 9 Floor 2 Lawrence MA 01843 Lawrence MA 01843 Country USA Country USA Contact Mr James Worden Contact Mr James Worden Phone 978 683 9700 Phone 978 683 9700 FAX 978 683 9702 FAX 978 683 9702 Email www james solren com Email www james salren com Party Authorized To Apply Mark Same as Manufacturer Report Issuing Office Cortland NY 5g 7 Control Number 3058249 Authorized by Wiliam T Certifica
29. that Solectria Renewables through inspection establishes the existence of such a defect and that it is covered by the Limited Warranty Solectria Renewables will at its option use new and or reconditioned parts in performing warranty repair and building replacement products Solectria Renewables reserves the right to use parts or products of original or improved design in the repair or replacement All replaced products and all parts removed from repaired products become the property of Solectria Renewables Solectria Renewables will attempt to repair the unit within a reasonable time period there is no reimbursement for lost energy production Solectria Renewables covers both parts and labor necessary to repair the product and return shipment to the customer via a Solectria Renewables selected non expedited surface freight within the contiguous United States and Canada Alaska and Hawaii and Rest Of The World are excluded Contact Solectria Renewables customer service for details on freight policy for return shipments outside of the contiguous United States and Canada Obtaining Service If your product requires troubleshooting or warranty service contact your distributor or dealer installer If you are unable to contact your distributor or dealer installer or the distributor or dealer installer is unable to provide service contact Solectria Renewables directly at the number listed on the website in the customer service section for your pr
30. tion Manager VATER Nity W This document supersedes all previous Authorizations to Mark for the noted Report Number Ths Authoezogen to Mack is for he eartsewe use of hierie s Cert and is prowkies gurmuert tn he Darficgton agreement between kinya mo ts Obert intertet s recporetelty and butatiy ore trated to he terms and conditions of the ogeeermect intertes gssernss nm betsy to ary porty gher than io the Cieni im accordance astm the agreenert for ary loss expense of damage occasioned by the use of In s Authorzntion 9 Mark Only fhe Chert i guttertzed to penne copying or stitution of tes Authoczatios W Maf aod fien ony in ts entirety Use of interiek s Certiicgtion mort is restricted amp fhe condition lait cut In he agreemert and in fee Agthortration tp Mark Anp further use of the intertet name for fhe sate or aovertsemert of the tected maternal prodat or service must fret Se aporoved e writing Oy merek itai Factory Assecements ond Folow ep Services ove ty he pumpose of asmueng sopropeare usage of he Certfingior mart in socordence wih he agreenent they are not for Me purposes of production quality oono and Go not cefews he Clent of heer obtgatione in fhe rapeat intertek Testing Services NA inc 165 Main Street Cortland NY 13045 Telephone 800 345 3851 of 607 753 6711 Fax 607 756 6699 UL Standard for Safety for Inverters Converters Controllers and Interconnection System Equipment for _ Use with Distributed Energy Resources Standard s
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