- 6 -
ОМ-310
NOVATEK-ELECTRO
*
Note
. When working with external transformers of rated current over 100A, the currents (measured and cal-
culated), except for the zero sequence current (ground fault) are transferred via RS-232/RS485 in amperes.
**
Note.
If power consumed by the load is over 999 kW (kVA, kVAr), then MW (MVA, MVAr) is displayed on
screen with a “
п
” – shaped point in the middle position. For instance, if the display shows 3
п
4”, it means 3.4
MW (MVA, MVAr).
***
Note.
If automatic reset is forbidden, "not" message is displayed.
****
Note.
If the time is not defined, "---" is displayed on screen.
1.2.3 Programmable parameters and their variability ranges
are shown below in table 1.5.
Table 1.5 - Programmable parameters
Settings and read-off
parameters
Code pa-
rameters
Minimum
values
Max.
values
Default
setting
Operation
Address
Transformers
CT in use
0
1
0
0-intergrated CT are in use
1-external CTs are in use
150
CT rated current, A
20
800
100
For an external CT
151
CT rated current, A
5
700
10
Used for calsculating the current and
the time of overcurrent protection
152
Power Control
Rated
power
of load, kW
3
450
5
153
Power limiter tripping
thresholds calculation
parameter
0
2
0
0 – threshold calculation for each
phase (power handling capability for
each phase equals Pnn/3)
1 – threshold calculation for each
phase +20% (total power for al pha-
ses equals Pnn, but not more than
Pnn*1,2/3 for each phase)
2 – aggregate threshold calculation
(total power for all phases equals Pnn)
154
Main threshold, %
50
150
110
155
Additional threshold*, %
30
100
90
156
Time before load relay
de-energizing, sec
(main threshold)
0
300
60
Time before load disconnect tripping
when the load wattage main threshold
is exceeded
157
Time while load relay is
open, min
(main threshold)
1
60
5
Time during which load relay is open
after tripping when the load wattage
main threshold is exceeded
158
Time before characteriz-
ing relay de-energizing*,
sec
(additional threshold)
0
300
10
Time after which the characterizing re-
lay will open after tripping when the
load wattage main threshold is ex-
ceeded
159
Time while the charac-
terizing relay is open,
min (additional thre-
shold)
1
60
5
Time during which the characterizing
relay is open after tripping which take
place when the load wattage main
threshold is exceeded
160
Additional threshold of
the characterizing relay
closure, %
3
100
30
Threshold for the characterizing relay
closure after overload triggered
opening
161
Characterizing relay
operation mode
0
4
0
0 - the relay is used as an alarm relay
1- the relay is used as a time relay
(closes after time specified in
pa-
rameter after load relay closure )
2-the relay is used for connecting addi-
tional load
3- the relay will close when load wat-
tless power threshold
is exceeded
4- relay will be switched on after ex-
ceeding of main tripping
162
Characterizing relay
activation mode when
0
2
0
0 – relay will close after expiration of
time
1 – relay will close after reduction of
consumed wattage to level
163
