Event Recording - Toshiba GRT100 Series Instruction Manual

- Magnitude and phase angle of phase current of each winding (I a1 , I b1 , I c1 up to I a3 , I b3 , I c3 )
- Magnitude and phase angle of neutral current of each winding (I n1 up to I n3 )
- Magnitude and phase angle of symmetrical component current of each winding (I 11 , I 21 , I 01
up to I 13 , I 23 , I 03 )
- Magnitude and phase angle of phase-to-phase voltage (V)
- Magnitude of phase differential current (I da, I db, I dc )
- Magnitude of residual differential current for REF protection (I d01 up to I d03 )
- Frequency
Phase angles above are expressed taking that of voltage as a reference phase angle. If the voltage
input is not provided, that of positive sequence current of primary winding is used as a reference
phase angle.
3.4.2

Event Recording

The events shown in Table 3.4.1 are recorded with the 1 ms resolution time-tag when the status
changes. The user can select the recording items.
Up to 96 records can be stored. If an additional event occurs when 96 records have been stored,
the oldest event record is deleted and the latest event record is then stored.
Event
Mechanical trip 1 command output or reset
Mechanical trip 2 command output or reset
Mechanical trip 3 command output or reset
Mechanical trip 4 command output or reset
Trip command output or reset
Indication reset input or rest
Relay failure detected or restored
CT1 current circuit failure detected or restored
CT2 current circuit failure detected or restored
CT3 current circuit failure detected or restored
External event signal 1 output or reset
External event signal 2 output or reset
External event signal 3 output or reset
System setting changed (*)
Relay setting changed (*)
Group setting changed (*)
(*): The event of setting change is classified into three events. The event "System setting changed"
corresponds to all the setting changes except setting changes in the sub-menu "Protection".
(See section 4.2.6 for changing the settings). The event "Relay setting changed" corresponds to
setting change of measuring elements and timers in the sub-menu "Protection". The event
"Group setting changed" corresponds to other setting changes in the sub-menu "Protection".
Table 3.4.1 Event Record Items
 62 
LCD Indication
Mech. trip 1 On or Off
Mech. trip 2 On or Off
Mech. trip 3 On or Off
Mech. trip 4 On or Off
Trip On or Off
Ind. reset On or Off
Relay fail On or Off
CT1 err On or Off
CT2 err On or Off
CT3 err On or Off
Event 1 On or Off
Event 2 On or Off
Event 3 On or Off
Sys. set change
Rly. set change
Grp. set change
6 F 2 S 0 7 8 9