Toshiba GR200 Series Instruction Manual page 295

Centralized busbar protection ied

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Comparison feature for contact chatter

The input circuit incorporates a comparison feature that protects against contact chatter and

this feature is configured using the setting [CMP_NUM]. Figure 4.4-2 illustrates this feature;

the comparison feature removes contact chatter. The period 't' applied for the removal of contact

chatter can be configured by setting a value for [CMP_NUM]. The formula for the calculation

The setting [CMP_NUM] is provided for all binary input circuits.

Actual input signal

Imported signal by

binary input circuit

Figure 4.4-2 Chattering countermeasure (e.g. [CMP_NUM] = 4)

If the user needs to operate the CPL for binary input circuit #1, the user should set On for

scheme switch [BI1_CPL]. Conversely, the user should set Off for scheme switch [BI1_CPL] if

CPL is not required. Since the entire range of binary input circuits have CPLs, a setting of On

or Off is a pre-requisite for every binary input circuit. The number of CPL is equal to number

of binary input circuits: that is, the number of CPLs is 9 in the BIO5A or 18 in the BI1A.

Delayed pick-up and delayed drop-off signal

Both an on-delay timer and an off-delay timer are provided in CPL; both are used to adjust the

timing for input signals, the user should set their respective time values for settings [On Delay

Timer] and [Off Delay Timer].

Logic level inversion

The Logic inversion function can invert the input signal and is provided for each binary input

circuit; the user can invert an input signal by setting Inverse for scheme switch [INVERSE-

SW]. A setting of Normal is also provided when inversion is not required.

[ CPM_NUM ] ×

System Frequency×12

Centralized GRB200

(Soft: 030, 031, 032, 033, 034)

6F2S1931 (0.20)

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