Telefault TWS - Travelling Wave Based Fault Location

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The Telefault TWS operates on the travelling wave principle and provides an accuracy of 150m ( 500ft). It can be used on high voltage AC lines of any length, including those containing sections of cable, parallel circuits, tapped loads and series capacitors. It can also be used on HVDC lines

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The Telefault TWS provides three different modes of fault location; Type A, Type D and Type E. In the Type A and D modes the fault location is determined using the transients generated by the fault itself. In the Type E mode faults are located using the transients generated by the re-closure of the circuit breaker onto the faulty line after the initial trip. The TWS is unaffected by fault resistance and provides a consistent level of accuracy many times better than conventional impedance type fault locators. Phase to ground faults, phase to phase faults and broken conductor faults, including those clear of ground where no fault current flows, can be located with the TWS.
The standard version of the Telefault TWS can accommodate up to eight line modules so that eight circuits can be monitored simultaneously. An integral GPS time receiver is used to provide sub-microsecond timing accuracy required for Type D operation. Multi-channel high-speed transient recording is used for Type A and Type D operation.
TWS Profile
Travelling wave based fault location
Internal modem provided as standard for remote data retrieval and configuration
Simple and inexpensive installation
Optional interfacing to SCADA systems / substation IEDs
The TWS package includes TWS Base Station software, which allows full remote interrogation and waveform analysis of fault records including direct measurement of fault distance, filter characteristics, amplitude, expansion and comparison of previous fault data with new data.