Short-Circuit Indicators with mechanical flag Earthing Fault Indicator (EFI) M
As part of import substitution, a fault indicator for cable lines has been developed and put into mass production - EFI M, which is designed to detect and indicate short-circuit currents and replaces the functionality of the foreign analogue Alpha M from Horstmann.
EFI M is a short-circuit current indicator with a built-in mechanical flag that requires no auxiliary power. It is designed for the detection and remote indication of short-circuit currents in 7.2-40.5 kV distribution networks with any type of earthing.
The device consists of an indicator unit - logger and three electronic current sensors.
EFI M is a short-circuit current indicator with a built-in mechanical flag that requires no auxiliary power. It is designed for the detection and remote indication of short-circuit currents in 7.2-40.5 kV distribution networks with any type of earthing.
The device consists of an indicator unit - logger and three electronic current sensors.
Technical specifications:
Parameter
Value
Voltage class
7.2-40.5 kV
Tripping threshold
400 A, 600 A, 800 A, 1000 A
Error
not more than 10%
Operating temperature
from -30°C to +45°C
Relay type
Latching operation, Pulse operation mode (pulse duration ≤ 100 ms)
Fault indication
Mechanical drop-down blinker
Power supply
Not required
Indication reset
Manually, by turning the knob counterclockwise
Indication tripping test
Manually, by turning the knob clockwise
Parameter setting
Using jumpers