Trip Blocking - Toshiba GRL150-100 Series Instruction Manual

BLK" (refer to Section 3.3.6). The message "Relay fail-A" is recorded when the scheme switch
[CTSVEN] is set to "ALM".
(3): Whether the LED is lit or not depends on the degree of the voltage drop.
(4): The binary output relay "FAIL" operates.
(5): The user-configurable binary output relays operate if assigned.
(6): The LED is on when the scheme switch [IDSVEN] is set to "ALM" and off when set to "ALM &
BLK".
The relationship between the LCD message and the location of the failure is shown in Table 6.7.1
in Section 6.7.2.
3.3.9

Trip Blocking

When a failure is detected by the following supervision items, the trip function is blocked as long
as the failure exists, and is restored when the failure is removed.
• A/D accuracy check
• Memory monitoring
• Watchdog Timer
• Telecommunication channel monitoring
When a fault is detected by the AC input imbalance monitoring and Id monitoring, the scheme
switch [CTSVEN] setting can be used to determine if both tripping is blocked and an alarm is
output, or if only an alarm is output.
3.3.10 Setting
The setting element necessary for the automatic supervision and its setting range are shown in the
table below.
Element Range
[CTSVEN] OFF/ALM&BLK/ALM
[IDSVEN] OFF/ALM&BLK/ALM
[TCSPEN] OFF/ON/OPT-ON
[CBSMEN] OFF/ON
[TCAEN] OFF/ON
[∑I AEN] OFF/ON
y
[OPTAEN] OFF/ON
[FERAEN] OFF/ON
DIFSV 50 – 100 %
TIDSV 0 – 60 s
TCALM 1 - 10000
∑I
ALM 10 – 10000 E6
y
YVALUE 1.0 – 2.0
OPTALM 100 – 5000 ms
CF-PER 1 – 60
FERALM 0.0 – 50.0
The scheme switch [CTSVEN] is set in the "Application" sub-menu. Other scheme switches are
set in the "Scheme sw" sub-menu.
Step Default Remarks
ALM&BLK Alarming and blocking or alarming only
ALM&BLK Alarming and blocking or alarming only
OFF Trip circuit supervision
OFF CB state monitoring
OFF Trip count alarm
∑I
OFF
OFF Operate time alarm
OFF Frame error rate alarm
1 % 50 % DIFSV threshold setting (% of DIF setting)
1 s 10 s DIFSV timer
1 10000 Trip count alarm threshold setting
∑I
E6 10000
0.1 2.0 y value setting
10 ms 1000 ms Operate time alarm threshold setting
1 s 10 s CF period threshold
0.1 % 20.0 % Frame error rate alarm level
⎯ ⎯
65
6 F 2 S 0 8 2 8
count alarm
y
alarm threshold setting
y