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ERL Launches Delta Phase (December, 2010)

ERLPhase has now introduced a new technique called the Delta Phase, which is a key in transformer and bus bar protection applications. This is a unique technique that promises secure differential protection even under extreme CT saturation and other adverse power system conditions. 

It is expected that transformer and bus differential relays be dependable and trip when there is an internal fault and block when there is an external fault even in the presence of severe CT saturation.

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