... months warranty, 4. CE, ISO. 300KVA Automatic voltage regulator:1. 300KVA Automatic voltage regulator,2. Automatic voltage regulator,3. Output voltage: 380v+-1%,4. CE, ISO9001-2000 ... switch, without output fuse switch, the electronic circuit to detect over-voltage express .Over voltage, over current, over temperature, over load, short circuit, and automatic ...