ETL-40

CENTRALISED CONTROL

The entire system is controlled from a central operator station. Microprocessor based operation ensures high measurement accuracy and reliability of the test results.

FAULT PRE-LOCATION

Time-domain reflectometer RIF-9 included with the system is used for determining the distance to faults in electrical power cables with all the main pre‑location methods:

Low-voltage method

• TDR (time-domain reflectometry): low-resistance faults, open cable breaks, various impedance changes characterization (cable sleeves, branches, etc.), total cable length measurement (incl. on a drum or bundle) and cable shortening ratio measurement.

High-voltage methods

• ARC/ARC multi-shot (arc reflection method): high-resistance and unstable faults, minimal harmful effects on a cable.
• ICE (impulse current envelope method): high-resistance faults that cannot be converted to low-resistance by burning faulty insulation.
• DECAY (voltage wave oscillation method): faults with high breakdown voltage.

SURGE WAVE GENERATOR WITH A SURGE LEVELS SWITCH

A surge wave generator with up to 2000 J surge energy is used for pinpointing cable faults with an acoustic method.

The generator is supplemented with a surge level switch allowing to select output voltage in the ranges of 0…8 / 0…16 / 0…32 kV, which delivers maximum possible energy of the surge pulses.

SAFETY

All cable test vans of ETL family are equipped with all-round operator safety systems consisting of the following modules and devices:

✓ Overvoltage and overcurrent protection.

✓ Overheating protection.

✓ Equipment and vehicle chassis protective earthing.

✓ Continuous grounding monitoring system.

✓ Emergency stop button.

✓ Automatic discharge device.

✓ Light and sound indication of high voltage.

✓ Vehicle high-voltage compartment door closure sensors.

✓ Safety ON/OFF keylock switch.

✓ Self-health and safety monitoring of high-voltage switches.