Sparks Electrical News July 2024

CABLES AND CABLE ACCESSORIES

9

The tools to find a cable fault W hen it comes to identifying and resolving cable faults, having the right tools is crucial. HellermannTyton South Africa offers a range of advanced equipment designed to make this task easier and more efficient. Here’s a look at some of the key tools in their lineup: TJSG16KV and TJSG32KV Surge Generators The TJSG16KV and TJSG32KV Surge Generators are powerful tools that convert a 220V input voltage into a

operator manual. The display is a 240 x 320 pixel transmissive LCD with multilevel greyscaling and is permanently backlit for optimal visibility.

• Long Battery Life • Compact • TDR • Impulse Current • Arc-Reflection

The TPCS101 Cable Locator power supply features a rechargeable built-in lithium battery that offers an impressive 8-hour battery life. Standard accessories include a padded canvas carry case, test leads, a switch-mode battery charger, and an

Enquiries: www.HellermannTyton.co.za

high voltage surge of up to 16kV or 32kV, respectively. This surge is sent down the cable via a timer relay, creating a short circuit at the fault point. This short circuit produces a distinctive “thump” sound, earning the device the nickname “Thumper.” The high voltage surge also generates a magnetic field, which helps trace the cable’s underground path. The TJSG16KV features: • Upgradeable to Modsys • Van or Trolley Mount • Robust Design • Mains Condition Lockout System • ICE Coupler Built-In • 4, 8,16kV 500J Max Output • Stainless Steel IP21 Enclosure • The TJSG32KV features: • Stand Alone Surge Generator • Upgradeable to Modsys • Van or Trolley Mount • Robust Design • Mains Condition Lockout System • ICE Coupler Built-In • 0-32kV 2200J Max Output • Stainless Steel IP21 Enclosure TGM205 Ground Microphone The TGM205 Ground Microphone is an essential tool for electricians working with underground cables. It allows the user to listen for the thumping noise created by the short circuit in the cable. environments. It detects the magnetic field generated by the surge generator, helping to pinpoint the exact location of the fault by hearing the thump sound through the geophone. The TGM205 Ground Microphone features: • Ease of use • Portable • Robust design • Analogue indicators of acoustic and magnetic signals • Rechargeable lithium batteries • IP67 enclosure TPCS101 Cable Locator For long cables, the TPCS101 Cable Locator uses a pre-locator instrument in two ways: the Time Domain Reflectometer (TDR) method and the Impulse Current Mode. The TDR method involves transmitting a pulse that reflects off the cable’s far end. Impedance mismatches along the cable indicate potential fault locations. In Impulse Current Mode, a high voltage discharge from a surge generator breaks down the fault, and the TPCS101 displays the distance to the fault on a digital screen. This device is portable and convenient, as it can be used with a strap around the neck for hands-free operation. The TPCS101 Cable Locator has the following features: This microphone is user-friendly and highly accurate, even in noisy

• Ease of use • Lightweight • Robust design

SPARKS ELECTRICAL NEWS

JULY 2024