ABB RED615 Technical Manual page 367

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1YHT530004D05 D

Technical Manual

Vector group of the

Winding 1 type

Zero-sequence component elimination

If Clock number is "Clk Num 2", "Clk Num 4", "Clk Num 8" or "Clk Num 10",

the vector group matching is always done on both, winding 1 and winding 2. The

combination results in the correct compensation. In this case the zero-sequence

component is always removed from both sides automatically. The Zro A

elimination parameter cannot change this.

If Clock number is "Clk Num 1", "Clk Num 5", "Clk Num 7" or "Clk Num 11",

the vector group matching is done on one side only. A possible zero-sequence

component of the phase currents at earth faults occurring outside the protection

area is automatically eliminated in the numerically implemented delta connection

Winding 2 type

Protection functions

Zero sequence

current elimination

HV & LV side

HV & LV side

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