FLA3.1V - For MV Overhead Networks
The fault indicator type FLA3.1VL is used in overhead lines of a network. The indicator can be mounted under live conditions with the help of an adapter and a hot stick. The indication is done by an ultra bright flashing LED.
The FLA3.1VL can communicate to a remote control via a bidirectional wireless connection. In this way all settings of the indicator can be adjusted at any time without removing the indicator from the powered line. The FLA3.1VL stands out for the great flexibility of the adjustments that can be done. Beside the basic settings of the indicator like trip current, response delay, reset time, etc., the FLA3.1VL can be adapted to auto-reclosers in the network. This provides an optimized fault indication and also allows the indication of different fault types. Permanent and temporary faults can be distinguished and indicated separately by an additional green bottom LED.
The bidirectional connection between the remote control and the fault indicator allows to read out the present current of the monitored net-work and the internal temperature of the indicator with the remote control at any time.
The fault indicator type FLA3.1VL can be connected to the remote indication interface type RIS. This allows an easy-to-install and retrofittable integration of the overhead line indicators into remote monitoring systems.
Advanced fault detection
The fault indicator type FLA3.1VL provides two methods to detect faults. The absolute threshold detection method works with a selected fixed or an automatically calculated absolute threshold. This method can be disabled when not required. Additionally the fault indicator type FLA3.1VL provides a di/dt measurement method. This method analyses current load changes that happen within a certain amount of time. The level of load change can be adjusted.
A subsequent voltage loss is used as an additional criterion to assure correct detection of a fault. This method can also be disabled when not required.
FEATURES & OPTIONS
| Three fixed threshold methods: |
Faults can be detected by a manually adjusted fixed absolute trip current or an automatically adjusted trip current on basis of the current load and a fixed factor or a scaling factor. |
| di/dt fault detection: |
Faults can also be detected on basis of current load deviation with subsequent voltage loss. |
| Enhanced detection and filtering: |
- Detection and filtering of temporary faults by adaption to auto-reclosers
- Filtering of over-currents which not result in network outages
- Inrush current restraint up to 2sec after network energisation
|
| Voltage detection: |
Two threshold levels can be selected for a better detection of the voltage status
- voltage off level: At which percentage of Un the voltage is to be considered as off
- voltage on level: At which percentage of Un the voltage is to be considered as on
|
| Full wireless configuration: |
All settings can be changed and read-out with the handheld remote type HS control or by the remote indication interface type RIS-FS. Also current loads, voltage status and temperature read-outs can be wirelessly read-out as live data. |
| Remote indication: |
Faults, resets and voltage or current status changes can be remotely indicated. |
| Data-Logging: |
Regular data read-outs of current loads, voltage status and internal temperature are configurable in short intervals. |
DIMENSIONS
DATASHEET
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