Associated Power Technologies, Inc. (APT) provides AC power sources for a variety of test & measurement, avionics, manufacturing, and military applications. Our power sources, while competitively priced, offer the very best technology and are backed by the highest level of support in the industry. This provides our customers the best value in the industry. Our 5000 Series is an entry level line of switching AC power sources and our 6000 Series is an advanced line of switching AC power sources. Each series includes four models with power ratings of 500 VA, 1 KVA, 2 KVA, and 4KVA.