Toshiba GR200 Series Instruction Manual page 406

Line differential protection ied

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where, "a" and "a2" are represented as

‡Note: When we suppose that all the self-impedance and all the mutual-impedance are

identical (Z aa =Z bb =Z cc and Z ab =Z bc =Z ca ), we can see that both Z 12 and Z 10 are

represented as zero when Z 10 is identical to Z GH .

Note: To run the FL, user should set either the symmetrical components (Z 11 , Z 12 and

Z 10 ) or the self-impedance (Z aa , Z bb and Z cc ) and mutual-impedance (Z ab , Z bc and

Z ca ). For example, the value of Z 11 is placed for setting [FL_1R1] and [FL_1X1]

when symmetrical setting is selected. If symmetrical setting is not selected, user

should set the value of the Z aa for setting [FL_1Raa] and [FL_1Xaa]. For more

information, see section 2.32.6(iii).

Data recording trigger and calculation trigger

The calculation is stated by signals; and following protection functions provide the trigger

With regard to the trigger signal of the external protection function, user can program

the trigger signal for recording data and calculation by using Element IDs (PLC connection

points), as shown in Table 2.32-2.

Table 2.32-2 Element IDs of recording data and calculation

Note: Element IDs are also listed in section 0.

+ 2 ( �� ∙ ��

a = 1∠120°, a

(a) Current differential protection (DIFL)

(b) External protection

Trigger for data recording

Trigger for calculation

6F2S1914 (0.49)

GRL200 (Soft 033 & 037)

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