Toshiba GR-200 Series Instruction Manual page 544

Multi functional protection ied

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Electric quantity definitions

Electric quantities, such as current/voltage/power (Ia, Va, P, etc.), are presented and

determined with CT/VT connection styles, as discussed in preceding sections. This section

groups the electrical quantities by the settings, which can allow calculate properly.

Current components handed in IED

Handling currents in the IED are grouped and summarized (see Chap. 5.4.5). For example, if

the IED has settings [Conn-CT]=2P and [2P_Type]=1, Ia and Ic will be mentioned with

entering currents at I L1 and I L3 terminals (see Table 5.4-11). Symmetrical components (I 1 , I 2 ,

and I 0 ) are zero (0) when this example is described.

Table 5.4-11 Current defined with VCT entering signals and settings

Ie determined with combination settings [Conn-CT] and [Conn-IeCT] (see Table 5.4-12)

Table 5.4-12 Ie

Setting combination

: The currents (i.e., Ib, I1, I2 and Ie modeled by settings [Conn-CT]=2P and

[2P_Type]=2P) are used only for the metering, and the operations of protection

relays do not judge themselves by using those currents.

Setting[Conn-CT]

Setting [2P_Type]

ruled by settings [Conn-CT] and [Conn-IeCT]

Setting[Conn-IeCT]

Setting[Conn-CT]

6F2T0200 (0.15)

Setting[Conn-IseCT]

Setting [2P_Type]=2

GRE200 (1,2)

Chapters

Gre200-1 Gre200-2