At present, the highest piezoelectric energy in China is divided into the following:
1. High voltage of life production, rated power supply voltage: 220V for single phase and 380V for three-phase;
2. High voltage of transmission line: 10KV, 35KV, 60KV, 110 (154) KV, 220KV, 330KV, 500KV
(transmission voltage commonly used now).
3. Ultra-high voltage transmission voltage: 1000KV and above, now in part of the test run.
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