Alternatively you can employ a manual or automatic transfer switch A transfer

Alternatively you can employ a manual or automatic

This preview shows page 17 - 20 out of 28 pages.

Alternatively, you can employ a manual or automatic transfer switch. A transfer switch is a double pole, double throw (DPDT) switch that switches both the hot and neutral wires to the AC distribution system from one power source to the other. Manual and automatic transfer switches are available from marine and RV dealers. They are commonly used to switch between a generator and "shore" (utility) power. Make sure you purchase an approved switch with AC voltage and cur- rent ratings that exceed the output ratings of both the inverter and the other source. 3. Do not connect the PROwatt 1500 to an AC branch circuit that has high-power consumption loads. The PROwatt 1500 will not operate electric heaters, air conditioners, stoves, and other electrical appliances that consume more than 1500 watts. Figure 10. Simple Transfer Switching Figure 11. AC Wiring with Transfer Switch
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15 Ground Wiring The PROwatt 1500 has a screw terminal on the rear panel labeled Chassis Ground. This is to connect the chassis of the PROwatt 1500 to ground. The ground terminal in the AC outlet on the front panel of the PROwatt 1500 is connected to the chassis. The chassis ground terminal must be connected to a grounding point, which will vary depending on where the PROwatt 1500 is installed. In a vehicle, connect the chassis ground to the chassis of the vehicle. In a boat, con- nect to the boat's grounding system. In a fixed location, connect the chassis ground lug to earth ground by con- necting to a ground rod (a metal rod pounded into the earth) or other proper service entrance ground. Use a #8 AWG or larger copper wire (preferably with green/yellow insulation) to connect the chassis ground terminal to the grounding point. In some installations a larger wire size may be required. Refer to the local/national codes applicable for your type of installation. The neutral (common) conductor of the PROwatt 1500 AC output circuit is connected to chassis ground. There- fore, when the chassis is connected to ground, the neutral conductor will also be grounded. This conforms to Na- tional Electrical Code requirements that separately derived AC sources (such as inverters and generators) have their neutral conductors tied to ground in the same way that the neutral conductor from the utility line is tied to ground at the AC breaker panel. WARNING! Do not operate the PROwatt 1500 without connecting it to ground. Electrical shock hazard may result. Figure 12. Wiring to AC Breaker Panel
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16 DC Wiring CAUTION! We recommend a Main Fuse in the cable between the battery positive and the inverter to pro- tect against dc wiring short circuits (external to the inverter). The fuse should be as close to the battery as possible. The specific fuse ampere rating should be sized to allow operation of all equipment connected to the cable and provide adequate protection for the cable. We recom- mend a Buss Fuse ANL-250 or equivalent if you are connecting the PROwatt 1500 with the recommended cable size.
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