- 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
Spring Failure
, and the excitation duration of that input
exceeds the time determined by the (
CB Charging) Spring Time
, the Alarm LED is activated;
CB Alarm
and
CB Spring Failure
alarms are displayed on the
Alarm Menu
.
Note that the spring charging time of the CB declared by the manufacturer must be
considered when determining the (
CB Charging) Spring Time
value; and a positive tolerance
for charging time is recommended to be added on.
To utilize (
CB Charging) Spring Supervision
function, the function must be set as
Active
and a
programmable input with
Spring Failure
assignment must be wired to the “end of charging”
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
Numerator Limit
, the function triggers
the Alarm LED, displays
CB Alarm
and
CB Numerator Alarm
texts on the
Alarm Menu
. Note
that the
CB Numerator Supervision
function does not count the manual tripping operations of
the CB.
Maximum guaranteed tripping operations of the CB declared by the manufacturer must be
considered when determining the
Numerator Limit
value. This value can be set between 1 and
65535.
The tripping operation numerator can be monitored and reset via the following address:
MENU » Measurements » CB Measurements » (Open Numerator)
.
7.
Σ
A Supervision
ΣA (Total Amperes) Supervision
measures and processes the RMS value of the phases at the
tripping instant. ∑A values are monitored and evaluated in means of supervision and
determination of maintenance periods of CBs with U
r
> 52 kV.
Note that the allowed ΣA for the CB poles declared by the manufacturer must be considered
when determining the
ΣA Limit
value.
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 T)
.
8.
Σ
A
2
Supervision
ΣA
2
(Total Square-Amperes) Supervision
measures and processes the RMS value of the
phases at the tripping instant. ∑A
2
values are monitored and evaluated in means of
supervision and determination of maintenance periods of CBs with U
r
≤ 52 kV.
Note that the allowed ΣA
2
for the CB poles declared by the manufacturer must be considered
when determining the
ΣA
2
Limit
value.
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 T)
.
↺
Summary of Contents for CPM 310 G
Page 1: ...CPM 310 G Digital Overcurrent Protection Relay User Application Manual vEN 2016 03...
Page 2: ...2...
Page 6: ...6 ABOUT DEMA...
Page 11: ...11 INTRODUCTION...
Page 32: ...32 PACKING LABELING INFORMATION...
Page 34: ...34 OPERATING MANUAL...
Page 53: ...53 RELAY MENUS MANUAL...
Page 55: ...55 The Menu Tree...
Page 56: ...56...
Page 57: ...57...
Page 58: ...58...
Page 59: ...59...
Page 60: ...60...
Page 61: ...61...
Page 128: ...128 DIGICONNECT PC PROGRAM MANUAL...
Page 189: ...189 APPLICATION DIAGRAMS...
Page 191: ...191 Sample Power Transformer Protection Application Diagram...
Page 193: ...193 FUNDAMENTAL CABLING DIAGRAM...
Page 203: ...203 APPLICATION DIAGRAM NO 10 RS485 Cabling...
Page 204: ...204 TECHNICAL DATA...
Page 220: ...220 GLOSSARY...
