Toshiba GR200 Series Instruction Manual page 412

symmetrical components, as shown in Figure 2.32-2. For further information, see
section 2.32.6(iii).
Note: In the calculation of earth fault, user is required to set the R 0 and the X 0 with
2
settings [FL_1R0] and setting [FL_1X0] respectively, when the impedance of line
GJ is considered in symmetrical components.
Note: When the mutual impedance of line GJ is considered , and when parallel lines are
3
applied, user should set the R 0m and the X 0m with settings [FL_1R0m] and
setting [FL_1X0m] respectively,. If a single line is considered, user are not
required to set these settings.
Note: User should set the K a , K b and K c with settings [FL_Ka], [FL_Kb], and [FL_Kc],
4
when the imbalance impedance is considered. For further information, see section
2.32.6(vi).
Note: User should set the line length for settings [FL_1line_km] when the length of line
5
GJ is considered and when the unit of length is represented by kilometer, as
shown in Figure 2.32-2. For further information, see section 2.32.6(v).
Compensation
Consider the influence of the distributed capacitance in Equation (2.32-23), likewise section
2.32.2(i)-2. When the line length is beyond 100km, the result of Equation (2.32-23) requires
compensation. Thus, Equation (2.32-17) is used to find the compensated distance (χ") with
respect to the fault distance (χ) which Equation (2.32-23) calculates. The setting procedures
are discussed later. (See section 2.32.6(iii)-2)
Data recording trigger and calculation trigger
(iii)
The calculation is started by signals; and following protection functions provide the trigger
signals:
Note: For more information of the ZS/ZG, see Chapter
1
protection
Note: For more information of the OC, see Chapter
2
protection
Note: With regard to the trigger signal from the external protection function, user can
3
program this trigger signal by using Element IDs (PLC connection points), as
shown in Table 2.32-3, which are also listed in section 0.
(a) Distance protection
(b) Over current protection
(c) Current differential protection (DIFL)
(d) External protection
.
.
- 389 -
(ZS/ZG)
1
(OC)
2
3
Relay application: Distance
Relay application: Overcurrent
6F2S1914 (0.49)
GRL200 (Soft 033 & 037)