SNV-308 & 309 Overhead Line short-circuit and grounding Fault Indicator

308 Overhead type earthing and short circuit fault indicator(four remote)

   Fault indicator is installed on the over-head lines, power cables and the busbars of the switch cabinet to indicate the fault current path. When line fault comes, the line inspector can determine the fault section, fault branch and fault point quickly by the alarm display on the indicator. It changes completely the methods of blind line inspection and finding the fault area through switching on one area after another in the past. Thus, it reduces the area and time of power outage and improves the reliability of the power supply.

Function

• Telemetry and telemetry
• Intelligent motor control card
• Can be charged to install and remove
• 6 LED fault status indicator light
• 1 LED running status indicator light
• Intelligent judgement of grounding and short circuit fault
• Support hand held PDA(APT-307)
• The flop position of a self-test per hour
• Battery voltage is sampled once per 5min
• Support online CT pickup power and solar power
• To support the avoidance of various non fault cases
• Support timing resrt,power on reset automatically,remote reset
• Support recording function

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 judegement of the grounding fault by the change of zero sequence current
• Time synchronization between the sensor and the sensor
• Optional threshold,incremental,percentage of multiple fault judgement
• Calibration of each sensor is carried out to ensure consistency of sampling
• The accurancy of the current sampling is less than 10A ± 0.3A,10-2000A ± 2%
• Temperature sampling recision ± 0.5u2103,voltage precision of ground electric field ± 10%
• Can accurately determine the tempoarty fault,transient fault,permanent fault,grounding fault
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