The digital TDR Teleflex T30E is designed for the location of low resistance faults and interruptions in low and medium vol- tage cables. The integrated battery power supply makes it an ideally suited instrument for field use. When connected to a shock discharge generator and an ARM®filter, the combination is best suited for pre-location of high resistance and intermittent faults.The Teleflex T30E offers convenient operator support with online help and one-button-operation and it automatically shows the far end of cable and fault distance in the ARM®-Mode. Even inexperienced users can easily locate faults with the “Step-by-Step Easy Mode”. The operator is guided through the fault locating process. On the other hand, the “Expert-Mode” provides free access to all parameters for comprehensive fault locating even under difficult conditions.

The Teleflex M is a modern, microprocessor controlled reflectometer for cable fault location on electricity networks. Menu driven operation and the automatic test sequence make for extreme ease of use.
Data acquired can be printed out directly to a printer or archived and analysed via Winkis database software.
 
The Teleflex M performs the following tests:

The reflectometer is available in two versions, either free standing or built into the R 30, Classic or Hitec 2000 test vans. Older test vehicles can be retro-fitted.

Performance Characteristic:

Digiflex Com is a compact high performance instrument designed for the location of faults on copper cables. Its capabilities are marked out particularly by the short range resolution (down to 2.5cm) and the long range of 30km.

Ease of use and the incorporation of the latest technology enable even inexperienced users to achieve quick and precise locations with the Digiflex Com. For the expert a multitude of more advanced features is available.
The proven method of pulse reflection is employed whereby a string of suitable pulses is sent down the cable which are wholly or partially reflected back from the fault. The size and shape of these indicate the type of fault.
 
Features:

The TDR Microflex is a professional Time Domain Reflectometer and Audio Frequency Generator designed to detect and locate faults on power cables and copper communication cables up to a distance of 3500m (11,500ft). Advanced signal processing techniques enable the TDR Microflex to find opens, short circuits, splices, taps, water ingress and other more elusive impedance mismatches. A built-in oscillator also provides an audio frequency tone for pair tracing and identification. Selectable cable impedance matching, along with variable velocity factor, enable the TDR Microflex to be used to test power and communication cables, including twisted pair and coaxial, with graphical results and fault distances displayed on a backlit 64 x 128 pixel LCD.

The TDR/Tone-Generator is housed in a tough, rugged ABS plastic moulding, water and dust proof and supplied complete with test leads and a protective tool-belt holster. The TDR Microflex is designed and manufactured to international standards for quality, safety and reliability.

Features:

The Digiphone is a directional acoustic listening device for the pinpointing of flash-over faults on power cables. State-of-the-art technology and ease of handling enables even users without training to locate precisly cable faults in conjunction with a surge generator (thumper).

The Digiphone measures the signals received by specially developed magnetic and acoustic sensors, which are integrated in one housing.

The location of the buried cable can be determined by the direction and intensity of the magnetic field, produced by the impulse current of a surge generator (thumper). With the bargraph-indicator of the Digiphone, the intensity of the strength of the magnetic field can be measured. This has a maximum directly above the cable.

The acoustic locating is done by measuring the flash-over noise. A switchable filter is built-in to optimise the measurement. The bandwidth of this filter is designed to minimise ambient noise (wind, vehicles).

A coincidence measurement is possible by receiving and indicating the signals of both sensors simultanously. Digiphone also allows measurement of the distance between the sensor and the fault resulting from the difference in time taken by the acoustic and magnetic signal.

Features:

An SPG 5-1000 is a portable multi functional system for testing, fault conditioning pre and pin-point location of faults in low voltage distribution networks.

Using an ingenious new patented pre-location method "ICEplus" the operator has an easy to use tool for pre location of faults in teed systems, which hitherto were very difficult to locate. This test principle uses the low frequency component of the impulse signals during a flashover at the fault point in order to determine the distance.

The usual problems of reflection and attenuation in tees encountered when using TDR and ARM methods are not existant in this new ICEplus method. A pre-location is possible irrespective of the number of tee joints in the section.

The compactness in size and weight has been made possible using an electronic HV source, discrete selected capacitors and a newly developed HV switching system. The unit is controlled via a PLC with integrated rotary command knob and a graphic display for the test modes and parameters.

Software supported easy handling, facilitates sucessful operation by semi skilled staff, without sacrificing safety and optimum results.

Features:

The mobile and battery powered fault locating system is designed for stand-alone operation. It will provide its full surge energy for up to four hours continuously. With 15 kV or 25 kV output voltage these systems are well suited for fault locating in low and medium voltage distribution networks. The powerful ARM® (Arc Reflection Method) is used for pre- location of high resistance faults. Low resistance faults can be lo- cated with only the TDR T3050 and without having to use high voltage methods. The Teleflex T3050 offers convenient operator support with online help and one-button-operation. It automatically shows the far end of cable and fault distance in the ARM®-Mode. Even inexperienced users can easily locate faults with the “Step-by- Step Easy Mode”. The operator is guided through the fault lo- cating process. On the other hand, the “Expert-Mode” provides free access to all parameters for comprehensive fault locating even under difficult conditions. 1150 Joules of surge energy provide the necessary power for accu- rately pin-pointing cable faults with the acoustic method. Weather- proof housing and big wheels make the Surgeflex 15 and 25 suitable for easy operation in the field. Connecting cables are conveniently accessible at the rear of the unit.

The Surgeflex 32 is a mobile system for testing and fault locating on low and medium voltage cables. The test and surge voltage of up to 32 kV make the Surgeflex 32 applicable for all nominal voltage cable networks.The powerful ARM® (Arc Reflection Method) is used for pre-location of high resistance faults up to 32 kV. Converting faults if necessary is possible by short-term burning in all voltage levels. Low resistance faults can be located with only the TDR T3050-S and without having to use high vol-tage methods.The Teleflex T3050-S offers convenient operator support with online help and one-button-operation and it automatically shows the far end of cable and fault distance in the ARM®-Mode.Even inexperienced users can easily locate faults with the "Step-by-Step Easy Mode". The operator is guided through the fault locating process. On the other hand, the "Expert-Mode" provides free access to all parameters for comprehensive fault locating even under difficult conditions.1750 Joules of surge energy provide the necessary power for accurately pinpointing cable faults with the acoustic method. Big wheels make the unit suitable for easy operation in the field.Connecting cables for earthing, mains, and HV are conveniently accessible at the rear of the unit.

Earth Fault Locator ESG 80-2 for pinpoint location of sheath faults. This instrument is a highly sensitive galvanometer and is provided with an amplifier. Interfering DC voltages can be suppressed with a compensation circuit.

The pinpoint location method:
Pinpoint location of a sheath fault is based on the step voltage method. The test current coming from a pulsed DC source up to 5 kV is flowing into the ground at the point of fault and results in a maximum step voltage at the fault. This peak is located with the two earth spikes and the ESG 80-2 earth fault locator. When approaching the fault position, the step voltage increases and decreases after the fault with a change in polarity.
See chapter "Sheath Testing and Fault Locating" for 5 kV DC sources as generators for the measured fault current.

Important control, signal and supply cable systems are moni- tored by socalled earth fault indicators in order to ensure un- interrupted operation. The response threshold of these indicators is largely variable. Normally, a single core earth contact does not cause any service interruption. In the event of a second earth fault however, the danger of a partial or total breakdown of the installation exists. For this reason, single core earth faults have to be located as quickly as possible. Several years ago, Seba Dynatronic developed the GEOLUX® system GL 660 specially for this application. The new GL 660-1 is a mark II version of the GL 660 permitting fault location up to fault resistances of 150 kOhms. Additionally, the new GEOLUX system features a compensation facility for measurements in cable systems with a high capacitance. for location of earth faults on cable systems up to 660 V and unearthed control and signal cable installations This makes the test equipment suitable for large enterprises and power plants, as well as for use in teed control and signal cable networks of the railways and public utilities. It can also be used for fault location in single phase airfield apron lighting cable networks. When using the GEOLUX®system, a very low frequency current (5 Hz) is coupled directly to the fault conductor. The electromag- netic field of this signal current, which does not disturb the oper- ation of the cable system, is picked up by an inductive probe leading to an exact location of the earth fault. For easier identi- fication, the signal current can be transmitted at a certain clock rate whereby the transmission time of the generator is indicat- ed on the receiver through a synchronizing circuit. With the help of a newly developed circuit, the cable capacitance can be com- pensated, making the location of faults with resistances of up to 150 kOhms possible.