6
ENM - OM V2.2 01.02-
Parameters
Value
−
Current;
−
Power;
−
Industrial frequency;
−
Power factor in three phases;
−
Direction of flow distribution;
−
Minimum and maximum downflow values
Measurement accuracy
−
Voltage:
−
when using capacitive dividers - 3 %;
−
when using voltage transformer – 1% ;
−
Current 3%;
−
Active, reactive and full power 5%;
−
Industrial frequency 1%
Parameters
Absolute current threshold (short-circuit)
10÷2000 А
Differential current threshold (short-circuit)
10÷2000 А
Maximum sensitivity angle of the power-directional
relay
30 deg.
Time of observation of the emergency process at a
short circuit
0.1 ÷ 10 s
Voltage threshold range
1÷35 kV
Current threshold range for phase-to-ground
faults
from 0.5 A
Time of observation of the emergency process
at phase-to-ground fault
0.1 ÷ 10 s
Preparing for reactivation
Up to 10 s
Design
Installation place
In the switchgear and control gear cell, on the control
board
Sensors
Connected to:
−
current sensors based on the Rogowski
coil DT PR-1;
−
standard voltage transformer;
−
capacitive dividers
Temperature range
Standard from – 40
°
С to + 70
°
С
Indicator protection degree
IP 20 according to IEC 60529, except for external
connection outputs
Impact of external climatic factors
S4 design group according to the requirements and
Moderately Cold Climate design of placement
category 3.1 according to IEC 721-2-1, but for
operation at ambient air temperature from -40 to
+70°C
Impact of mechanical factors
M7 design according to IEC 721-3-3-87, design
group N2 according to the requirements
Feeder Monitor
LODESTAR FM-CS