Function description
The PD LOC system solves the problem of pinpointing for mixed cables (XLPE / PILC) and for PD in joints of single core cables. The exact location of the joints in the field is generally not known, and these joints cannot be localised using audio frequency methods.
The system has an impulse transmitter that uses a induc-tive coupler to inject a signal into the cable. The receiving and evaluating unit consists of an input amplifier for proc-essing the signal and a control unit in the pelicase. The visualisation of the distance system's transmitter location is performed by using a TDR T30-E PD reflectometer in a separate menu, by means of an additional PD software function. The puls transmitter software processes the user inputs, provides the operating status display, pulse gen-eration, error and overload monitoring, and monitoring of the battery and charger.
The impulse transmitter and coupler transmit a sufficiently strong impulse signal into the exposed cable. Thus the signal is directly received at one of the cable ends as well as the reflection of the pulse from the other end. The time difference between the directly received pulse and the reflected pulse at the remote end is used, like in the OWTS, to calculate the distance to the injection point of the impulse, and this is then compared with the previously determined position and corrected if necessary.
A mounted coupler, in conjunction with a PD-TX from the PD-LOC system, enables pulses to be coupled inductively onto exposed cables of a suitable diameter. The coupler can be fastened to the cable with the soft tie supplied. There is an M8 thread nut so that an extension rod can be used. This allows the coupler to be conveniently placed on the cable outside a shaft.
A foild keyboard and LEDs for selecting the pulse width ensure easy operation and handling.
For cables with very dense copper wire shielding, and when using the system with cables with metal sheath (lead sheath / aluminium sheath), it is also possible to couple an artificially generated PD impulse.
Users that have a normal Teleflex T 30-E can also up-grade it to the PD version. The other normal reflectometer functions are not affected by this upgrade.
Features
- Foil keyboard with LEDs for selecting the pulse width
- Impulse couplers 42 and 64 mm
- Very easy to handle and operate
- 24 hours of operation with one battery charge
- Evaluation identical to the OWTS pre-location
- Cable identification option
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Current exibitions
