What's the max voltage the Setra Power Meter can monitor?

DO NOT EXCEED 347V Line to Neutral of 600V line to line. 

This meter is equipped to monitor loads up to 347 V L-N. Exceeding this voltage will cause damage to the meter and danger to the user. Always use a Potential Transformer (PT) for voltages in excess of 347V L-N or 600V line to line. The Setra Power Meters are 600V Over Voltage Category III device.

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