Document Outline

• Inverter Stacking Control  Series (ISC-S) Cable
  • Inverter Stacking Control  Series (ISC-S) Cable
    • Installation Guide
  • About Xantrex
    • Xantrex Technology Inc. is a world-leading supplier of advanced power electronics and controls wi...
  • Trademarks
    • Inverter Stacking Control – Series Cable is a trademark of Xantrex International. Xantrex is a re...
    • Other trademarks, registered trademarks, and product names are the property of their respective o...
  • Notice of Copyright
    • Inverter Stacking Control  Series (ISC-S) Cable Installation Guide© January 2004 Xantrex Interna...
  • Disclaimer
    • UNLESS SPECIFICALLY AGREED TO IN WRITING, XANTREX TECHNOLOGY INC. (“XANTREX”)
    • (a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY TECHNICAL OR OTHER IN...
    • (b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSS OR DAMAGE, WHETHER DIRECT, INDIRECT, CONSEQUE...
  • Date and Revision
    • January 2004 Rev A
  • Part Number
    • 975-0059-01-01 Rev A
  • Contact Information
    • Telephone:
    • 1 800 670 0707 (toll free North America) 1 360 925 5097 (direct)
    • Fax:
    • 1 800 994 7828 (toll free North America) 1 360 925 5143 (direct)
    • Email:
    • [email protected]
    • Web:
    • www.xantrex.com
• About This Guide
  • Purpose
  • Scope
  • Audience
  • Organization
  • Conventions Used
    • WARNING
  • CAUTION
    • Important:
    • Abbreviations and Acronyms
    • Related Information
    • Important Safety Instructions
      • WARNING
        • 1. Before installing and using the ISC-S cable, read all instructions and cautionary information ...
        • 2. Do not expose the ISC-S cable to rain, snow, spray, or water.
        • 3. Use only attachments recommended or sold by the manufacturer. Doing otherwise may result in a ...
        • 4. Do not operate the ISC-S cable if it has been damaged in any way. If the ISC- S cable is damag...
        • 5. Do not disassemble the ISC-S cable. It contains no user-serviceable parts. See Warranty for in...
        • 6. To reduce the risk of electrical shock, disconnect both AC and DC power from the inverters bef...
• Contents
• Figures
  • 1
    • Introduction
    • Stacking Inverters
      • Important:
      • Figure 1-1 Off-Grid Applications with Series-Stacked Inverters
      • Figure 1-2 On-Grid Applications with Series-stacked Inverters
    • The ISC-S Cable
      • Required accessory cable
    • CAUTION : Damage to Equipment
      • Figure 1-3 Inverter Stacking Control – Series Cable (ISC-S cable)
      • What it does
      • What it does not do
  • 2
    • Installation
    • DC Wiring
      • Battery Requirements for Series-stacked Inverters
      • Battery-Bank Configuration for Series-stacked Inverters
        • Figure 2-1 Example of Battery Connections for Series-stacked Inverters (24Vdcshown)
      • Grounding Series-stacked Inverters
        • To ground series-stacked inverters:
          • 1. Connect the ground bond in the DC disconnect between the inverters and the batteries to the pr...
          • 2. Connect an appropriately sized ground wire from the chassis bonding ground lug on the L1 inver...
          • 3. Connect a second appropriately sized ground wire from the chassis bonding ground lug on the L2...
            • Figure 2-2 DC Grounding of Series-stacked Inverters
      • Connecting the Battery Bank to the Inverters
        • To connect the battery (or battery bank) to the inverters:
          • 1. Connect POSITIVE cables:
            • a) one cable from the battery POSITIVE terminal to a circuit breaker in the DC disconnect (torque...
            • b) a second cable from the same battery POSITIVE terminal to another circuit breaker in the DC di...
            • c) a third cable from the first circuit breaker in the DC disconnect to the L2inverter POSITIVE...
            • d) a fourth cable from the second DC disconnect to the L1 inverter POSITIVE(+) terminal.
          • 2. Connect NEGATIVE cables:
            • a) one cable from the same battery NEGATIVE terminal (torque to manufacturer’s recommendations) t...
            • c) a third cable from the ground bond in the DC disconnect to the L2 inverter NEGATIVE(–) terminal.
            • d) a fourth cable from the ground bond in the DC disconnect to the L1inverter NEGATIVE(–) termi...
          • 3. Ensure the correct polarity of the cables with a DC voltmeter (DVM).
          • 4. Use an insulated 1/2 inch wrench or socket to tighten the 5/16 SAE nuts to 10-15 foot/lb for e...
          • 5. After tightening the connections on the batteries, apply antioxidant paste to the battery term...
          • 6. Install the battery terminal covers (if used)—red for positive, black for negative—over the in...
        • Figure 2-3 DC Connections for Dual Inverters, Series-stacked
    • AC Wiring - General
      • WARNING
      • Inverter AC Distribution Panel (Sub-Panel) Wiring (if used)
        • Install the Inverter AC Distribution Panel and conduit as follows:
          • 1. Determine the location for the Inverter AC Distribution Panel (i.e., the sub-panel) and instal...
          • 2. Install an AC conduit to the inverter panel and the inverter.
          • 3. Determine which circuits the inverter will power and install the appropriate circuit breakers ...
          • 4. For On-Grid systems, remove wires for circuits to be backed up from the main utility panel and...
          • 5. Install a double pole 60-amp maximum (disconnect) main circuit breaker in the inverter panel: ...
          • 6. Verify that under no circumstances can utility power or generator power energize the inverter ...
          • WARNING : Shock Hazard
      • Neutral Bonding
      • Grounding
        • WARNING : Hazardous Voltage
    • AC Wiring - Specific
      • Off-Grid AC Wiring for Sine Wave Plus Inverters
        • To connect the AC wiring for an off-grid application using Sine Wave Plus Inverters:
        • Grounding
          • 1. Connect Ground (green) wires:
            • a) from the primary earth/ground to the AC distribution panel,
            • b) from the L1 inverter AC ground bar to the inverter panel ground bar,
            • c) from the L2 inverter AC ground bar to the inverter panel ground bar.
        • Neutral Bonds
          • 2. Connect Neutral (white) wires:
            • a) from the Neutral bus in the inverter panel, to the ground bar in the inverter panel, (Neutral-...
            • b) from the L1 inverter Neutral Out terminal, to the L2 inverter Neutral 2 terminal. (Inverter-to...
            • c) from the L2 inverter Neutral Out terminal to the inverter panel Neutral bus. (Common neutral b...
        • Inverter to AC Distribution Panel
          • 3. Connect a HOT wire:
            • a) (black) from the L1 inverter AC Hot Output (120 Vac) to the inverter panel L1 terminal,
            • b) (red) from the L2 inverter AC Hot Output (120 Vac) to the inverter panel L2 terminal.
          • 4. Torque all inverter terminal block connections to 25 inch-pounds.
        • Figure 2-4 AC Wiring for Series-stacked SW Plus Inverters Off Grid
      • On-Grid AC Wiring for Sine Wave Plus Inverters
        • Grounding
          • 1. Connect Ground (green) wires:
            • a) from the primary earth/ground to the main utility panel,
            • b) from the main utility panel to the AC distribution panel (Sub-panel),
            • c) from the L1 inverter AC ground bar to the utility panel ground bar,
            • d) from the L2 inverter AC ground bar to the utility panel ground bar.
        • Neutral Bonds
          • 2. Connect Neutral (white) wires:
            • a) from the Neutral bus in the utility panel to the ground bar in the utility panel. (Neutral-to-...
            • b) from the L1 inverter Neutral Out terminal to the L2 inverter NEUTRAL 2 terminal (Interter-to-i...
            • c) from the L1 inverter Neutral Out terminal to the utility or utility panel neutral bus (Common ...
            • d) from the L2 inverter Neutral Out terminal to the AC distribution panel neutral bus (Common neu...
        • Inverter to AC Distribution Panel
          • 3. Connect Hot wires:
            • a) (black) from the L1 inverter AC Hot Output (120 Vac) to the inverter panel L1 terminal.
            • b) (red) from the L2 inverter AC Hot Output (120 Vac) to the inverter panel L2 terminal.
        • Inverter to Utility Panel
          • 4. Connect Hot wires:
            • a) (black) from the utility panel HOT L1 terminal to the L1 inverter’s AC1 GRID terminal.
            • b) (red) from the utility panel HOT L2 terminal to the L2 inverter’s AC1 GRID terminal.
          • 5. Torque all inverter terminal block connections to 25 inch-pounds.
        • Figure 2-5 AC Wiring for Series-stacked SW Plus Inverters OnGrid
      • Generator AC Wiring to Series-stacked Inverters
        • With a generator disconnect switch
          • To install the AC wiring from a generator with a (GDS):
            • 1. Connect Ground (green) wires:
              • a) from the generator Ground to the generator disconnect switch Ground terminal,
              • b) from the generator disconnect switch Ground to the AC Ground bar in the utility panel*.
            • 2. Connect Neutral (white) wires:
              • a) from the generator Neutral to the GDS Neutral terminal,
              • b) from the generator disconnect switch Neutral to the L1Inverter Neutral2terminal.
            • 3. Connect Hot (L1- black) wires:
              • a) from the generator L1 Gen Hot Out to the GDS L1 Hot terminal,
              • b) from the generator disconnect switch L1 Hot to the L1Inverter AC2 Gen terminal.
            • 4. Connect Hot (L2 - red) wires:
              • a) from the generator L2 Hot Out to the generator disconnect switch L2Hot terminal,
              • b) from the generator disconnect switch L2 Hot to the L2Inverter AC2 Gen terminal.
            • 5. Torque all inverter terminal block connections to 25 inch-pounds.
            • Important:
        • Figure 2-6 Generator Wiring to Series-stacked SW Plus Inverters
      • Wiring for a 240 Vac-Only Input Source
        • To wire the inverters for a 240-Vac only input source:
          • 1. Run Ground wires (green):
            • a) from the AC Distribution Panel to the primary earth/ground connection.
            • b) from the generator ground to the AC Distribution Panel ground.
            • c) from the ground terminal in the Autotransformer to the AC Distribution Panel.
            • d) from the AC Distribution Panel to the Ground bar in the L1 inverter.
            • e) from the AC Distribution Panel to the Ground bar in the L2 inverter.
          • 2. Run NEUTRAL wires (white):
            • a) from the center-tapped neutral connection in the autotransformer to the NEUTRAL 1 terminal in ...
            • b) from the center-tapped neutral connection in the autotransformer to the NEUTRAL 1 terminal in ...
            • c) from the NEUTRAL OUT on the L1 inverter to the NEUTRAL 2 terminal on the L2 inverter.
            • d) from the Neutral OUT on the L2 inverter to the Neutral terminal in the AC Distribution Panel.
          • 3. Run HOT wires:
            • a) (black) from the L1 Output in the generator to the L1 terminal in the Autotransformer.
            • b) (black) from the L1 output terminal in the Autotransformer to the AC2GEN terminal in the L1 i...
            • c) (black) from the INV OUT terminal in the L1 inverter to the L1 input terminal in the AC Distri...
            • d) (red) from the L2 Output in the generator to the L2 terminal in the Autotransformer.
            • e) (red) from the L2 output terminal in the Autotransformer to the AC2GEN terminal in the L2 inv...
            • f) (red) from the INV OUT terminal in the L2 inverter to the L2 input terminal in the AC Distribu...
          • 4. Torque all inverter terminal block connections to 25 inch-pounds.
        • Figure 2-7 AC Wiring for a 240 Vac-Only Input Source
    • Connecting the ISC-S Cable
      • Figure 2-8 The 25-pin D-connector on the ISC-S Cable
      • Figure 2-9 Stacking Port Locations on SW Plus Inverters
      • To connect the ISC-S cable:
        • 1. Orient the 25-pin D-connector to align with the Stacking Port on the Inverter and gently press...
        • 2. Tighten the screws on the connector to secure the cable to the port.
        • 3. Connect the other end of the ISC-S cable to the second inverter’s Stacking Port as instructed ...
      • Figure 2-10 The ISC-S Cable Connected to Dual Sine Wave Plus Inverters
    • CAUTION ; Damage to Loads
  • 3
    • Operation
    • Start-up and Testing
      • To start up and test the inverters:
        • 1. Ensure the circuit breakers on all AC sources (utility or generator, if any) feeding the inver...
        • 2. Ensure the circuit breakers in the AC distribution panel (sub-panel) are OFF.
        • 3. Switch ON both inverters. The inverters should be providing 120/240 Vac to the AC distribution...
        • 4. In the AC distribution panel, use an AC voltmeter and measure the voltage between the L1 (Hot)...
        • 5. In the AC distribution panel, use an AC voltmeter and measure the voltage between the L2 (Hot)...
        • 6. In the AC distribution panel, measure the voltage between the L1 (Hot) and L2 (Hot) terminals....
        • 7. If all voltages/tests are correct,
          • a) switch on the circuit breakers in the AC distribution panel, and
          • b) switch on the generator or utility circuit breakers feeding the inverters.
        • 8. Verify the inverters are charging the batteries and powering the AC distribution panel.
        • 9. Switch both inverters OFF and open the circuit breakers to ensure all AC and DC power is turne...
        • 10. Replace all covers and panels on the inverters and sub-panel.
        • 11. The series-stacked inverter system is now tested and ready for use.
      • Figure 3-1 Testpoints for Confirming Voltages
    • Setting Changes
      • Automatic and Manual Generator Control
      • Bulk and Float Charging Parameters
        • Change the Bulk and Float Charging settings as follows:
      • Equalize Charging
        • Change the Equalize Charging settings as follows:
        • Automatic Generator Equalize Charging
        • Manual Equalize Charging
          • Important:
  • Warranty and Return Information
    • Warranty
      • What does this warranty cover?
      • How do you get service?
      • What proof of purchase is required?
      • What does this warranty not cover?
      • a) the product if it has been misused, neglected, improperly installed, physically damaged or alt...
      • b) the product if it has been subjected to fire, water, generalized corrosion, biological infest...
      • c) the product if repairs have been done to it other than by Xantrex or its authorized service ce...
      • d) the product if it is used as a component part of a product expressly warranted by another manu...
      • e) the product if its original identification (trade-mark, serial number) markings have been defa...
    • Disclaimer
      • Product
      • Exclusions
      • Warning: Limitations On Use
    • Return Material Authorization Policy
    • Return Procedure
      • 1. Package the unit safely, preferably using the original box and packing materials. Please ensur...
        • 2. Include the following:
        • 3. Ship the unit prepaid to the address provided by your Xantrex customer service representative.
          • If you are returning a product from outside of the USA or Canada
          • If you are returning a product to a Xantrex Authorized Service Center (ASC)
    • Out of Warranty Service
    • Information About Your System
  • Index
    • Xantrex Technology Inc.