Intelligent overhead line fault indicator

It can detect the short-circuit fault, ground fault and measure the line current operating condition accurately. It can communicate two-way real-time with the communication terminal through the wireless. So that it can report the fault status and line operating condition to the communication terminal real-timely. Also, it can receive the test signal, configuration parameter and upgrade programme realtimely from the communication termina.

Features

• 6 highlight LEDs  fault status indicator light, and 1 LED red running status indicator.
• Can be charged to install and uninstall
• Short-circuit and grounding Detection of judgment
• Supporting hand-held PDA(SNV-800)
• Through accurate judgment ground fault zero sequence current change
• Subtle level of time synchronization (between sensor and sensor)
• Can accurately identify 20 ms minimum down time
• Can accurately determine temporary failure, the transient fault and permanent fault, ground fault
•  >10 A current sampling precision：±0.3A，10~2000A：±2%
• Firstly current≥5A，CT power supply of the power supply meet the SNV-308 (including wireless data transmission)

Technical Parameters

• Line voltage: 4~35kv (neutral point resistance grounding)
• System frequency: 50Hz or 60Hz
• Load current: 0~630A
• Diameter of wire: 8~40mm (insulated wire or bare conductor)
• Maximum resistance of grounding withstanding: 200Ω
• Maximum short-circuit current: 40kA
• Back-up battery: 4.8Ah/3.6V disposable long-life lithium battery
• Power consumption: 10~20uA/3.6V
• Reset time: 1~48h (default 8h) or reset automatically when power on again.
• Operation times: 5000
• Protection level: IP65
• Weight:<500g
• Life:>8 years

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 Characteristic

•  Support for the judgement of the coincidence gate
• Accurate synthesis of zero sequence current
• Intelligent motor control card 
• Ultra low power consumption in real time sampling
• A wave of 64 point difference sampling
• Support remote signal,telemetry,remote control and remote control
• Can accurately identify the 20ms minimum fault time
• Support remote serve upgrade and parameter settings
• Accurate judgement of the grounding fault by the charge of zero sequence current
• Time synchronization between the sensor and the sensor
• Optional threshold,incremental,precentage of multiple fault judgement
• Calibration of each sensor is carried out to ensure consistency of sampling