Single end fault locator | Streamer

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0 - 99 years


SEFL - Single-End Fault Locator for 22 kV line


Fault location accuracy ±150 m | Faults detected Line-to-ground faults, line-to-line faults, three-phase faults | Network grounding system: any type | Lines supervised: overhead lines and cable lines (less than 20% of the total length) | Fault location method  : travelling wave-based method, single-end installation






 Data Acquisition Unit including digitizer and power supply |  Mounted in 19” Rack box for SEFL |  Dimensions 221,2 (8,7”) height x 192,1 (11,5”) depth

Equipment included:

VOLTAGE TRANSDUCERS : Rated voltage: indoor installation up to 24 kV, outdoor installation up to 38 kV | Secondary voltage, Upn 5 V | Nominal frequency DC, 50 Hz or 60 Hz | 3 dB Bandwidth 20 Hz – 4.5 Hz | Signal cable length 33 m | Creepage distance : indoor installation 375 mm, outdoor installation 740 mm | Weight Indoor installation 1.6 kg, outdoor installation 3.0 kg | Power supply 230 V

DATA ACQUISITION SYSTEM : Sampling rate 20 MHz | Signal to Noise Ratio SNR 68 dB | ADC resolution  14 bits | Power supply 230 V | Dimensions : Indoor installation: 4U of 19’’ rack, outdoor installation (climate controlled) : 12 U of 19’’ rack

SERVER : Power supply 230 V | Dimensions : Indoor installation: 1U - 42.8 mm (1.68”) x 482 mm (18.98”) x 589.1 mm (23.19”) without Bezel | CPU  Processor Intel Xeon E-2186G, hexa-core HT, 8 MB cache, 3,8 GHz, 4,7 GHz Turbo | OS Windows 10 Pro for Workstations - 4 core Plus | Memory 16 GB  Memory  DDR4 at 2.666 MHz; 2x 1TB hard disk (7200 rpm) | Maximum number of fault recorded 24 390 faults |              Network connection : LAN


SOFTWARE : The user can have easy access to the user interface of SEFL software, both in situ and remotely. Monitoring of the three-phase voltages measured by sensors in real-time Visualization of the last fault measured by the system. Access to time-reversed and filtered signals under analysis to visualize the results of the simulations (graph ‘Energies’) All faults data are stored on hard drive both in .bin and .txt files. 

Name : Single End Fault Locator

Brand : Streamer

Streamer is a specialist for innovative solutions which improve the reliability of medium and high voltage electrical networks. Streamer invests more than 10% of its turnover every year in three different R&D centers:
• St. Petersburg, Russia - in cooperation with the State Polytechnical University of St. Petersburg;
• Moscow, Russia - for the development of electronic products;
• Chur, Switzerland - in cooperation with University of Applied Sciences Rapperswil

Lightning protection from 6 to 123kV A unique lightning protection solution for overhead line: Line Lightning Protection Devices (LLPDs) with EasyQuench (EQ) technology that has been invented and patented by Streamer. More than 1 million of LLPDs have been installed worldwide (Russia, China, Indonesia, Malaysia, Thailand, Brazil, UAE, Iran, Vietnam, Switzerland, Germany etc.).
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