User manual CONTAX SWI INSTALLATION REV B

[. . . ] Installation Guide Cable SWI Stacking Interface Cable for SW and PS Series Inverters About Xantrex Xantrex Technology Inc. , is a world-leading supplier of advanced power electronics and controls with products from 50-watt mobile units to 1 MW utility-scale systems for wind, solar, batteries, fuel cells, microturbines, and backup power applications in both grid-connected and stand-alone systems. Xantrex products include inverters, battery chargers, programmable power supplies, and variable speed drives that convert, supply, control, clean, and distribute electrical power. Trademarks Xantrex is a registered trademark of Xantrex Technology Inc. Notice of Copyright Stacking Interface Cable Installation Guide © October 2001 Xantrex International. [. . . ] In this mode, the inverters act independently of each other; however, their output is phase locked and synchronized 180 degrees out-of-phase. Both units can independently charge the batteries or provide battery backup power during a utility outage. NOTE: Use tape to label the inverters as INVERTER 1 (L1) and INVERTER 2 (L2), for future reference. INVERTER 1 (L1) PS STACKING PORT NEGATIVE (-) BLACK TERMINAL POSITIVE (+) RED TERMINAL SWI SERIES STACKING INTERFACE CABLE NEGATIVE (-) BLACK INTERCONNECT CABLE POSITIVE (+) RED INTERCONNECT CABLE (not used in installations with dual disconnects) PS STACKING PORT NEGATIVE (-) BLACK TERMINAL POSITIVE (+) RED TERMINAL INVERTER 2 (L2) Figure 2-1 PS Series DC Interconnect Cables and SWI Series Stacking Cable © 2001 Xantrex Technology Inc. · Connect one of the inverter's positive terminals to the DC disconnect. · Connect the DC disconnect to the positive terminal of the battery bank. · Connect the Series Stacking Cable (SWI) to the STACKING port of both inverters. · Connect the DC chassis ground lugs of both inverters together using a heavy gauge wire. · Connect the negative end of the battery bank to a solid earth ground (refer to inverter installation manual). NOTE: Connect the positive and negative wires to the batteries as show in the illustration below. This ensures an even charge and discharge through the battery bank. Inverter 1 (L1) Positive Tie Negative Tie + ­ Series Stacking Cable (SWI) NOTE: Series Stacking Cable connects on AC side for SW inverters DC Disconnect + ­ + ­ + ­ Inverter 2 (L2) Chassis Ground + ­ + ­ DC Ground Figure 2-3 Series Stacking Using One DC Disconnect (Block Diagram) © 2001 Xantrex Technology Inc. All Rights Reserved. P/N 975-0013-01-01 Rev B 10/01 9 2. 0 INSTALLATION Series Stacking (continued) Series Stack DC Wiring (two disconnect devices) When stacking two inverters using two DC disconnect devices, connect the units and batteries as follows (refer to Figure 2-4): · Tie the inverter's negative terminals together using an appropriate length of cable (sized to fit). · Connect a cable from the L1 inverter's negative terminal to the negative terminal of the battery bank. · Connect a cable from the L2 inverter's negative terminal to the negative terminal of the battery bank. · Connect a cable from the L1 inverter's positive terminals to the DC disconnect. · Connect a short cable from the DC disconnect to the positive terminal of the battery bank. · Connect a cable from the L2 inverter's positive terminal to the DC disconnect. · Connect a short cable from the DC disconnect to the positive terminal of the battery bank. · Connect the Series Stacking Cable (SWI) to the STACKING port of both inverters. · Connect the inverter's DC chassis ground lugs together using a heavy gauge wire. NOTE: Connect the positive and negative wires to the batteries as show in the illustration below. This ensures an even charge and discharge through the battery bank. Inverter 1 (L1) + ­ Negative Tie DC Disconnect Series Stacking Cable (SWI) NOTE: Series Stacking Cable connects on AC side for SW inverters + DC Disconnect ­ + ­ + ­ Inverter 2 (L2) Chassis ground + ­ + ­ DC Ground Figure 2-4 Series Stacking Using Two DC Disconnects (Block Diagram) 10 © 2001 Xantrex Technology Inc. All Rights Reserved. P/N 975-0013-01-01 Rev B 10/01 2. 0 INSTALLATION Series Stacking (continued) Wiring with a Conduit Box When wiring a stacked pair of inverters using a conduit box, a longer DC cable must be supplied to connect the negative terminals of the inverters together. [. . . ] Switch ON the main service panel's circuit breakers feeding the inverters. Verify the inverters are charging the batteries and powering the sub-panel (refer to the operator's manual). Replace all covers and panels on the inverters and sub-panel. The stacked inverter system is now ready for use. [. . . ]