DEMA CPM 310 G, User Manual

Page: 118 / 225

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CB Supervision Settings Menu
CB Supervision Settings Menu
monitors and configures
the following 9 functions that are effective on the CB.
1. Opening Time Supervision
This function measures and supervises the time interval
between the generation of tripping impulse and the
disappearance of 52a signal from the CB. If the
measured value is evaluated greater than the set value,
the Alarm LED is activated; “CB Alarm” and “CB Open
Failure” texts are displayed on the
Alarm Menu
.
Note that, the tripping time of the CB declared by the
manufacturer and the maximum tripping delay time
taken into account while the selectivity evaluations are
made must be considered when determining the
Opening Time
value.
To utilize
Opening Time Supervision
function, the
function must be set as
Active
and a programmable
input with
52a
assignment must be wired to a normally
open auxiliary contact of the CB. The measured tripping
time for the latest operation of the CB can be viewed
and reset at this address:
MENU » Measurements»> CB Meas. > (Opening Time) .
2. Closing Time Supervision
This function measures and supervises the time interval
between the generation of closing impulse and the
appearance of 52a signal from the CB. If the measured
value is evaluated greater than the set value, the Alarm
LED is activated; “CB Alarm” and “CB Close Failure”
texts are displayed on the
Alarm Menu
.
Note that the closing time of the CB declared by the
manufacturer must be considered when determining
the
Closing Time
value.
To utilize
Closing Time Supervision
function, the
function must be set as Active and a programmable
input with 52a assignment must be wired to a normally
open auxiliary contact of the CB. The measured closing
time for the latest operation of the CB can be viewed
and reset at this address:
MENU » Measurements » CB Meas. » (Closing Time) .
3. Open Pulse
This value is set in seconds and determines the
duration of the tripping impulse generated by the relay.
4. Close Pulse
This value is set in seconds and determines the
duration of the closing impulse generated by the relay.
↺
Main Screen » Menu »
Automatic Control Settings »
CB Supervision