The HDWH-35 wireless voice phase detector (hereinafter referred to as the "instrument") is used for phase detection of two high-voltage lines connected to the grid or ring network. The instrument can upgrade the remote phase detection function. The instrument is suitable for live working and secondary side live working of 6-220KV AC transmission lines, and has high-voltage electrical testing function.

The instrument adopts wireless transmission technology, which is safe and reliable to operate, easy to use, and overcomes many disadvantages of wired phase detectors.