Event Recording; Faulted Phase; Power System Quantities; Displayed Power System Quantities - Toshiba GRE110 Instruction Manual

Faulted phase

This is the phase to which a operating command is output.

Power system quantities

The following power system quantities in pre-faults and post-faults are recorded.
- Magnitude of phase current (I a , I b , I c )
- Magnitude of zero sequence current (I e , I se )
- Magnitude of zero phase voltage (V e )
- Magnitude of positive and negative sequence currents (I
- The ratio of negative to positive sequence current (I
- Percentage of thermal capacity (THM)
The zero sequence current I e in the model 420, 421 and 422 is calculated from the three phase input
currents and the calculated I e (I 0 ) is displayed. The I e in other settings and models is displayed the
current fed from CT.
On the model 820 and 821, the input power system quantities are I a , I b , I se and V e . Therefore, It
can NOT calculate I e , I
Power system quantities
Phase current
Zero sequence current
Zero phase voltage
Positive and negative
sequence current
Ratio of Negative to positive
sequence current
Percentage of thermal
capacity
3.4.2

Event Recording

The events shown in Appendix C are recorded with the 1 ms resolution time-tag when the status
changes. For BI1 to BI6 command, the user can select the recording items and their status change
mode to initiate recording as below.
One of the following four modes is selectable.Modes
Not to record the event.
To record the event when the status changes to "operate".
To record the event when the status changes to "reset".
To record the event when the status changes both to "operate" and "reset".
For the setting, see the Section 4.2.6.5. The default setting is "B"
Up to 200 records can be stored. If an additional event occurs when 200 records have been stored,
the oldest event record is deleted and the latest event record is then stored. The LCD display only
I and I /I .
1 , 2 2 1
Table 3.4.1 Displayed Power System Quantities
Model 400, 401, 402 Model 420, 421, 422
I , I , I
a b c
I
e
-
I , I
1 2
I / I
2 1
THM
 76 
, I )
1 2
/I )
2 1
Model 820, 821
I , I , I I , I
a b c a c
I , I I
e se se
- V
e
I , I -
1 2
I / I -
2 1
THM THM
Setting
N
O
R
B
6 F 2 T 0 1 7 2