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6 F 2 S 0 8 5 7
- 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
)
- Percentage of thermal capacity (THM%)
Phase angles above are expressed taking that of the voltage as a reference phase angle. If the
voltage input is not provided, then the positive sequence current of the primary winding is used as
a reference phase angle.
3.4.2 Event Recording
The events shown are recorded with a 1 ms resolution time-tag when the status changes. The user
can set a maximum of 128 recording items, and their status change mode. The event items can be
assigned to a signal number in the signal list. The status change mode is set to “On” (only
recording On transitions) or “On/Off”(recording both On and Off transitions) mode by setting.
The “On/Off” mode events are specified by “Bi-trigger events” setting. If the “Bi-trigger events”
is set to “100”, No.1 to 100 events are “On/Off” mode and No.101 to 128 events are “On” mode.
The name of an event cannot be set on LCD. It can set only by RSM100. Maximum 22 characters
can be set and can be viewed on both of the LCD and RSM Setting(view) screen. But the LCD
screen of event record displays only 11 characters. Therefore, it is recommended the maximum 11
characters are set.
The elements necessary for event recording and their setting ranges are shown in the table below.
The default setting of event record is shown in Appendix H.
Element Range Step Default Remarks
BITRN 0 - 128 1 100 Number of bi-trigger(on/off) events
EV1 – EV128 0 - 3071 Assign the signal number
Up to 1024 records can be stored. If an additional event occurs when 1024 records have been
stored, the oldest event record is deleted and the latest event record is then stored.
3.4.3 Disturbance Recording
Disturbance Recording is started when overcurrent starter elements operate or a tripping command
is output, or PLC command by user-setting (max. 4: Signal No. 2632 to 2635) is output. The
records include 13 analog signals (primary: I
a1
, I
b1
, I
c1
, I
n1
, secondary: I
a2
, I
b2
, I
c2
, I
n2
,
tertiary: I
a3
, I
b3
, I
c3
, I
n3
, voltage: V), 32 binary signals and the dates and times at which
recording started. Any binary signal in shown in Appendix B can be assigned by the binary signal
setting of disturbance record. The default setting of binary signal is shown in Appendix H.
The name of binary signal can be set only by RSM100. Maximum 22 characters can be set and can
be viewed on both of the LCD and RSM Setting(view) screen. But the waveform data analysis
screen of disturbance record displays up to 11 characters of them. Therefore, it is recommended
the maximum 11 characters are set.
The LCD display only shows the dates and times of the disturbance records stored. Details can be
displayed on a PC. For how to obtain disturbance records on the PC, see the PC software
instruction manual.
The post-fault recording time can be set between 0.1 and 3.0s and the default setting is 1.0s. The
pre-fault recording time depends on the post recording time. The pre-fault recording time is fixed
at 0.3s.