Megger EZT4V3-50T1WK Portable Fault Location Systems For LV Networks

Product Highlights

The new dual-stage 3 kV EZ-Thump is the first of its kind in the entire market, and along with the updated 4 kV singlestage unit they are portable, compact and lightweight, battery and AC line operated cable fault location systems specifically designed for fault locating of shielded and unshielded low voltage power cables. Due to their portable, robust and (wet) outdoor-capable enclosure, they are ideally suited for all typical fault locating operations on LV cables either in industrial applications up to 3 kV or 4 kV, street light fault locating or fault locating of LV power circuits in the utility industry. The EZT3DV2 model is the only dual-stage 3 kV unit in the market which addresses LV cables with either 600 V or 1000 V ratings and a max permissible test level of 3 Uo (1.8 kV or 3 kV).

Accurate pinpoint fault location of high resistance faults is achieved using the "Thunder & Lightning" method whereby the 4 kV single or 3 kV dual stage 500 Joule surge generator (thumper) and an acoustic/electromagnetic receiver are used. Pinpointing of low resistance faults in unshielded cables requires the additional ESG NT digital ground/ earth fault locator with or without optional "A" frame. Accurate location of faults is achieved using the voltage gradient method. When approaching the fault, the voltage gradient potential increases, while decreasing with reversed polarity after passing the fault. The change in polarity allows the fault to be located precisely.

Features

• Single-stage capacitor surge discharge: 500 J for 4 kV model
• Compact and lightweight, 75 lbs (34 kg)
• Battery and AC line operation; field-replaceable battery
• Automatic end of cable and distance to fault indication
• Up to 94 mA current, depending on voltage
• F-OHM safety feature to ensure safe grounding
• Interface for remote EMERGENCY OFF box
• HiBrite color display for excellent outdoor visibility
• TDR prelocation of very low resistance faults
• ARM® prelocation of high resistance/flashover faults
• Fault pinpointing, high- and low-resistive fault
• Sheath testing and sheath fault locating
• Aside from the expert mode, the quick-step mode combined with the simple E-Tray GUI are especially convenient for operators who do not use the equipment on a regular basis.
• Automatic fault locating procedure starting with a hipot testing, continuing with the prelocation and pinpointing.
• Operating of unit via E-Tray GUI and rotary control knob.
• Automatic end of cable and distance to fault detection.
• Automatic sectionalizing (for specific markets).
• Automatic breakdown detection.
• Safety key switch interlock (also available without).
• F-OHM HV interlock to detect improper grounding.
• Operation from internal battery or from an AC source, or simultaneous charging of battery and AC operation.
• Rugged, lightweight, high impact and weather-resistant IP53 designed enclosure.