5
ENM - OM V2.2 01.02-
Table 1 – Technical specifications of the Device
Parameters
Values
Types of registered faults
Types of recorded faults
−
2- and 3-phase short circuits identification;
−
2- and 3-phase short circuits direction detection;
−
2- and 3-phase –to-ground fault identification;
−
2- and 3-phase-to-ground fault direction
identification;
−
phase-to-ground fault identification;
−
Phase-to-ground fault direction detection
Recording the line switching faults
Yes
Selectivity
Detection of the direction of phase-to-ground and short circuit
faults
Minimum zero sequence current for phase-to-ground
fault registration
0.5 А
General description of the devices
Voltage class of overhead and cable power
distribution lines
6-35 kV
Network frequency
45-65 Hz
Visual indication of the fault
−
LCD indicator
−
LED indication
Number of last faults stored in the internal memory
240
Power supply used in the indicator
−
Built-in standby extracted lithium battery (15 years)
−
Powered from:
-
an auxiliary services supply with any type of
voltage = 110-240V (± 10%),
-
line supply ~100-270 V,
-
or constant voltage:
1) A= 9-18 V (nominal value of 12 V)
2) B=18-36 V (nominal value of 24 V)
3) C= 36-72 V (nominal value of 48 V)
Resetting the fault indication
−
With the external command;
−
by the timer;
−
by the button on the Device
Communication
RS-485 MODBUS communication protocol
Feeder Monitor
LODESTAR FM-CS