DEMA CPM 310 G User Manual page 119

5. Spring Supervision
This function monitors and supervises the CB spring charging time. When the charging spring
is discharged, the "end of charging" auxiliary contact of the CB is closed. If this contact is
wired to an input that is assigned as
exceeds the time determined by the (
CB Alarm CB Spring Failure
and
Note that the spring charging time of the CB declared by the manufacturer must be
considered when determining the (
for charging time is recommended to be added on.
CB Charging) Spring Supervision
To utilize (
programmable input with
auxiliary contact of the CB.
6. CB Numerator Supervision
This function counts and supervises the tripping operation of the CB triggered by the tripping
relay of CPM 310 G; if the count exceeds the set value
the Alarm LED, displays
CB Numerator Supervision
that the
the CB.
Maximum guaranteed tripping operations of the CB declared by the manufacturer must be
considered when determining the
65535.
The tripping operation numerator can be monitored and reset via the following address:
MENU » Measurements » CB Measurements » (Open
7. ΣA Supervision
ΣA (Total Amperes) Supervision
tripping instant. ∑A values are monitored and evaluated in means of supervision and
determination of maintenance periods of CBs with U
Note that the allowed ΣA for the CB poles declared by the manufacturer must be considered
ΣA Limit
when determining the
ΣA values for each pole of the CB can be viewed and reset via the following address:
MENU » Measurements » CB Measurements » (ΣA R), (ΣA S), (ΣA
8. ΣA 2 Supervision
ΣA 2 (Total Square-Amperes) Supervision
phases at the tripping instant. ∑A
supervision and determination of maintenance periods of CBs with U
Note that the allowed ΣA
ΣA
when determining the
ΣA 2 values for each pole of the CB can be viewed and reset via the following address:
MENU » Measurements » CB Measurements » (ΣA2 R), (ΣA2 S), (ΣA2
Spring Failure
CB Charging) Spring Time
alarms are displayed on the
CB Charging) Spring Time
function, the function must be set as
Spring Failure
assignment must be wired to the "end of charging"
CB Alarm CB Numerator Alarm
and
function does not count the manual tripping operations of
Numerator Limit
measures and processes the RMS value of the phases at the
value.
measures and processes the RMS value of the
2 values are monitored and evaluated in means of
2 for the CB poles declared by the manufacturer must be considered
2 Limit
value.
- 119 -
, and the excitation duration of that input
, the Alarm LED is activated;
Alarm Menu
.
value; and a positive tolerance
Numerator Limit
, the function triggers
Alarm Menu
texts on the
value. This value can be set between 1 and
Numerator).
> 52 kV.
r
T).
≤ 52 kV.
r
T).
↺
Active
and a
. Note