Radiodetection cable fault locator arrows easily guide you to the ground faults. Riser Bond TDR Time Domain Reflectometer tester.
Cable Ground Fault Locators
The Cable Fault
Locator A-Frame easily connects to
the RD8100 PDL, RD7100
TL underground cable fault locator receivers
converting it to a ground cable fault locator including secondary power cables.
Arrows on the locator receiver's LCD easily guide the operator to
cable fault when the transmitter is connected to a faulted cable.
Arrows point towards the cable fault
The cable fault locator automatically changes to the cable fault location frequency when the A-frame when it's connected
The A-frame connects to the cable locator for single or two hand use
Display shows the fault signal strength to determine whether there may be other faults on the same cable.
When near the cable fault, the forward or backward arrows point
towards the fault where ever you place the A-frame. The signal strength number shows the strength of the cable fault to
determine if there is another fault on the cable and which fault is
the major fault.
Time Domain Reflectometers, TDR's are sometimes called "cable
radar" because both use reflected signals to determine
distances. The TDR sends a signal pulses down the cable.
Changes in the cable impedience cause some of the signal to be
reflected back and the time delay and signal strength of the for the
reflection are measured. TDR's locate shorts, opens, wet
splices, corroded splices, unknown splices, wet cable, splits, load
coils, service theft, isulation damage, cuts, crimps, smashed cables ... A TDR locates the
length of cable to a single or multiple ground faults up to 15 miles
quickly, then an A-Frame with one of the Radiodetection locators
above with ground fault locating narrow the position to within a
hand shovel size for repair.
Velocity Of Propagation, VOP is the speed of the signal traveling
on the cable. The speed of light equals a VOP of 1.
Tables are available for many cable types. Examples; Gel
filled 24AWG telephone cable: 0.64 VOP. Adjusting the VOP
selection in the TDR until the distance measured with the TDR
matches physical distance measured on same cable or other cable of
the same type if of cable can be more accurate especially if the VOP
for the cable is unknown.
Since the distance to the cable fault accuracy is a percentage of
the distance to the fault, connecting closer to the fault will
improve the accuracy.