Toshiba GR200 Series Instruction Manual page 1050

Line differential protection ied

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VCT11B is designed for 1.5 circuit breaker arrangement (1.5CB), as shown in Figure 5.2-3.

VCT11B is available for 1/2 size case and larger.

Three-phase voltages

Reference voltage on busbar

Reference voltage on busbar or

residual voltage

The three-phase currents in the

1.5CB arrangement

Residual current

The other three-phase currents in the

1.5CB arrangement

Residual current

The other residual current in the

parallel lines

V s2 (or V e )

Figure 5.2-3 Transformer module (VCT11B)

The channel number about the AC analog input is used to represent the

terminal location when the user sets the ratio about the CT or the VT. We

shall discuss later in section

In 5A rated operation, jumpers are inserted on all CTs, whereas no jumper is

inserted for 1A rated. To change it, see section

For the destination of input signals, see Appendix:

terminals and relay applications

Reference voltages (Vs and Vs2) are used in the Voltage check (VCHK)

Relay applications: VCHK

function; see Chapter

Residual voltage (Ve) can be selected when setting [APPL-Ves2] = Ve. For

more information, see the succeeding section.

Setting VCT ratio.

6F2S1914 (0.49)

Changing VCT rated current

Matrix between VCT

GRL200 (Soft 033 & 037)

Chapters

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