Basler-electric BE1-11g Instrukcja Użytkownika Pobierz pdf (Strona 370)

100

101

358 9424200994 Rev N

Table 119. Internal Compensation Chart

IEC Transformer Setup

The IEC setup table is aimed at describing transformers that use phase shifts and winding designs that

are more commonly found outside the US market. As can be found in the IEC standards, phase and

bushing names of U, V, W, will be used generally, rather than A, B, and C, or H and X. Specifying phase

shift and transformer connection is accomplished with the D-Y-Z + clock method. For instance, a

transformer connection will be Dy1 rather than a DAB/Y, though some dual designations will be used for

clarity. The number associated with the winding (Dy1) can be almost any hour of the clock, hence the

term “around the clock” phase shifting.

In transformer standards such as IEEE C57.12.00 and IEC-60076-1, there will be many variations on the

nomenclature and figures used to show how the phases are identified in a three-phase system. For

details on IEC transformer connections, go to www.basler.com

and download the technical paper titled

Three Phase Transformer Winding Configurations and Differential Relay Compensation, which was

presented at the 2004 Western Protective Relay Conference.

Use BESTCOMSPlus to open the System Parameters, Transformer Setup screen and select the IEC

Setup button. On this screen (Figure 274), you can setup Windings 1 and 2. Press the OK button when

finished.

Compensation

Ground

Compensation

A Phase B Phase C Phase

Wye (none) 0 = No I

Wye (none) 1 = Yes I

- I

DAB 0 = No or 1 = Yes

- I

) / √3 (I

- I

) / √3 (I

- I

) / √3

DAC 0 = No or 1 = Yes

- I

) / √3 (I

- I

) / √3 (I

- I

) / √3

DDAB 0 = No or 1 = Yes (I

- 2I

+ I

) /3 (I

+ I

- 2I

) /3 (-2I

+ I

) /3

Configuration BE1-11g

1 2 ... 365 366 367 368 369 370 371 372 373 374 375 ... 671 672

Basler-electric BE1-11g Instrukcja Użytkownika Strona 370

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Basler-electric BE1-11g Instrukcja Użytkownika Strona 370

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