Toshiba GR-200 Series Instruction Manual page 232

Multi functional protection ied

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Figure 2.19-7 illustrates the FRQ1 blocking by (1) RCD, Time derivative of frequency (Δf/Δt)

and (2) RCD-AR, active range selection. The user should have settings [FRQ-RCD] and [FRQ-

RCD-AR-OF/UF].

Frequency(Hz)

Nominal (f0)

Figure 2.19-8 Active rage set with [FRQ-RCD-AR-OF/UF] settings

RCD element (Δf/Δt) is to monitor the change ratio of the frequency to the

time; the detection is regulated with setting [FRQ-RCD] (Hz/s). If the

frequency (f0) is changed rapidly rather than the [FRQ-RCD], 'FRQ-RC'

signal will be generated. The 'FRQ-RC' signal will be generated for both

raising and downing.

(2)RCD-AR: Settings [FRQ-RCD-AR-OF] and [FRQ-RCD-AR-UF] is to determine the

active range (Hz). 'FRQ-RC' signal is outputted upon the occurrence of rapid

Trip-block logic

Figure 2.19-7 Block for FRQ1 tripping

PLC programming

Setting[FRQ-RCD-AR-OF]

Setting[FRQ-RCD-AR-UF]

6F2T0200 (0.15)

800001EBB0 FRQ1-BLOCK

GRE200 (1,2)

Chapters

Gre200-1 Gre200-2