Toshiba GR200 Series Instruction Manual page 435

Line differential protection ied

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Scheme logic

Trip-signal collection

Trip-signal collection gathers the trip signals provided by each protection function and groups

them to the trip operation commands "OPT-TRIP", "OPT-TRIP-A", "OPT-TRIP-B", and "OPT-

TRIP-C" for General-trip-signal production, as shown in Figure 2.33-2.

The TRC logic has PLC connection points, which the user can program for issuing the

trip command. For example, if the user wishes to trip the CBs using signals generated by

external relays, the signals can be connected to the TRC logic using the following PLC

connection points: TRIP-A_ADD, TRIP-B_ADD, TRIP-C_ADD and TRIP_ADD.

Figure 2.33-2 Scheme logic for Trip-signal collection

General-trip-signal production

Figure 2.33-3 illustrates the general-trip-signal production logic. The user can program the

generation of trip signals using the PLC connection point "ADD_OPT_COM", when trip signals

are not available from the relay functions.

The TRC function has a scheme switch [TP-MODE] to determine a trip mode; hence, the

user can select either single-phase trip mode (1-PHASE) or three-phase trip mode (3-PHASE)

or per-phase trip mode (PER-PHASE) for the CB tripping. Table 2.33-4 has shown the output

signals when the TRC function receives the trip signals from the protection functions. Note

that the scheme switch [TP-MODE] is only applicable when a phase trip mode (1P) is set in a

protection function (i.e., the user should set trip-phase selectors using [TPMD] settings, which

some protection functions have. If single-phase trip signals are not generated in the protection

FC*-OPT-TRIP_A

800000EBB3 TRIP-A_ADD

FC*-OPT-TRIP_B

810000EBB4 TRIP-B_ADD

FC*-OPT-TRIP_C

820000EBB5 TRIP-C_ADD

FC*-OPT-TRIP

830000EBB6 TRIP_ADD

6F2S1914 (0.49)

GRL200 (Soft 033 & 037)

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