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Phase failure protection relay TH-217
Phase failure protection relay TH-217

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Phase failure protection relay TH-217
It functions for protecting a pahse sequence, phase loss,three -phase unbalance.

New Products

Phase failure protection relay



    TH-217 Open-Phase Protector adopts the advanced large-scale interated circuits.Its shape and performance can be comparable to the similar one in Europe.There are a great number of advantages,such as the beautiful compact shape,wide timing range,high accuracy and reliablity,low power consumption,long life,large capacity and easy installation.It can be used in all kinds of automatic control system.It functions for protecting a phase sequence, phase loss, and three-phase unbalance.


Technical Parameter:



Contact rating


Rated voltage

Three phase or Three phase four-wire:AC110V 220V 380V 50Hz

Output contact



Electrical life



Mechanical life






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