Earthing Fault Indicator (EFI) PD with voltage monitoring, short-circuit current, and cable temperature monitoring functions EFI PD-01NKT
EFI PD-01NKT is an online monitoring system designed to detect, analyze, and continuously track partial discharge signals, as well as cable temperature rise. The device uses partial discharge detection technology by the pulse current method, providing increased sensitivity and comprehensive monitoring of various types of discharges in distribution equipment.
In addition, the system integrates the following functions:
The device combines the functions of measurement, analysis, and diagnostics using a digital OLED display, which allows operators to assess the insulation condition of switching equipment, reduce operating and maintenance costs, as well as timely identify and eliminate hidden insulation defects, increasing the reliability of distribution systems.
In addition, the system integrates the following functions:
- Cable temperature monitoring;
- High voltage presence indication;
- Short-circuit current indication.
The device combines the functions of measurement, analysis, and diagnostics using a digital OLED display, which allows operators to assess the insulation condition of switching equipment, reduce operating and maintenance costs, as well as timely identify and eliminate hidden insulation defects, increasing the reliability of distribution systems.
EFI PD-01NKT is equipped with:
The device consists of an indicator unit - logger and three electronic current and temperature sensors.
- EFI with temperature measurement functionality;
- Partial discharge detection module by pulse current method;
- The ability to transmit temperature and partial discharge data to a DTU (Data Transfer Unit) for further analysis.
The device consists of an indicator unit - logger and three electronic current and temperature sensors.
Technical specifications:
Parameter
Value
Supply voltage
220 V AC/DC or 24-70 V DC
Degree of protection
IP54, made in a metal housing
Operating environment
20℃～65℃
≤90%RH
≤90%RH
Storage environment
-30℃～70℃
≤95%RH
≤95%RH
Overall dimensions
106×53×102 mm
Display
1.3-inch monochrome OLED, 128×64 dot matrix
Parameter
Value
Measurement range
0～5000 pC
Sensitivity
Not less than 100 pC
Measurement accuracy
Discharge magnitude measurement not less than 5%, discharge frequency not less than 2%
Frequency band range
100 kHz - 5 MHz
Monitored variables
Discharge magnitude, average magnitude, discharge frequency
Discharge frequency
Not more than 5000 (1 sec)
Parameter
Value
Temperature range
-50℃～100℃
Accuracy
± 0.1 ℃
Sensor degree of protection
IP65
Parameter
Value
Tripping threshold
≥0,35 Un
Interlocking relay tripping threshold
≥0,65 Un
Service life
≥100000 часов
Dielectric strength (Connection terminals to housing)
2000 V
1 min.
1 min.
Interlocking relay switching capacity
220 V AC / 3 A
30 V DC / 3 A
30 V DC / 3 A
Parameter
Value
Short-circuit tripping current setting
200 A ~ 2000 A, standard factory setting is 600 A, tripping delay is more than 20 ms
Earth fault tripping current setting
10 A ~ 150 A, standard factory setting is 20 A, tripping delay is more than 200 ms
Automatic reset time
2 hours (factory setting) - 72 hours
Maximum withstand current for the sensor
20 kA, 4 sec.