Toshiba GR-200 Series Instruction Manual page 1014

Multi functional protection ied

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Note: The above coefficients are derived with the following equations:

(1) Currents in three-phase (I L1 , I L2 , I L3 ) and in symmetrical component (I1, I2, I0):

For example, in In=1A , we can have coefficient 1706.666667.

(2) Earth fault current (I e ) and I e used for SEF (I se ) :

For example, in In=1A , we can have coefficient 3413.333333.

(3) Voltages in three-phase (V L1 , V L2 , V L3 ), in symmetrical component (V1, V2, V0), in earth-

fault (Ve) , and in reference (Vs):

For example, in Vn=110V , we can have coefficient 53.74606142.

I1,I2,I0,Ie,Ise

Va,Vb,Vc,V1,

V2,V0,Ve,Vs,

Coefficient=

Secondary current rating

Coefficient=

Secondary current rating (or Ise rating current)

Coefficient=

Secondary phase-phase voltage rating

Corresponded

primary values

(V2 secondary)

(V0 secondary)

(V4 primary)

(Vs primary)

6F2T0200 (0.15)

Coefficients

GRE200 (1,2)

Chapters

Gre200-1 Gre200-2