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Telefault
TWS
- Travelling Wave Based Fault Location
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Click
on Image to Enlarge
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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.
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| 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.
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| TWS
Profile
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Travelling
wave based fault
location |
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Internal
modem provided as
standard for
remote data
retrieval and
configuration
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Simple
and inexpensive
installation
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Optional
interfacing to
SCADA systems /
substation IEDs
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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.
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