Megger EZ-THUMP 12kV TDR Cable Fault Locator
Condition: Refurbished / Calibrated
Warranty: 1 Year Warranty
Shipping: USA & Worldwide
- Megger EZ-THUMP 12-500 12kV Cable Fault Locator (BC# 40470-L/T*)
- AC Adapter/Charger
- (4) Power Cords
Megger EZ-Thump 12 kV Cable Fault Locator
The EZ-THUMP 12 kV model is a compact and lightweight, battery and AC line operated, portable cable fault location system. It is designed for quick, effective, accurate and safe fault locating operations to greatly reduce system customer outage minutes.
Due to its portable and robust enclosure, it is ideally suited for all typical fault locating operations on MV cables.
The 12 kV model is typically used as part of a “satellite” fault locating concept for remote areas that may have less frequent faults, when simple operation, light weight and economics are important, or for hard to access inner-city locations.
The unit typically requires no adjustments and is operated via the unique and easy to follow E-TRAY GUI and a rotary control knob. It guides the user automatically through the entire fault locating process, starting with a Hipot Test and followed by both a Prelocation and Pinpointing step. During this 3 step process the test data will be stored and used in non-typical fault locating situations to interpret the result and provide advice to the user of what to do next.
Features:
- Aside from the expert mode, the quick-step mode is especially convenient where users may not operate the unit on a regular basis.
- Automatic fault locating procedure.
- Operating of unit via unique E-Tray GUI and rotary control knob.
- Automatic end of cable and distance to fault location.
- Automatic sectionalizing (for specific markets).
- Automatic breakdown detection.
- Key switch safety interlock standard (available also without).
- Operation from internal battery or from an AC source, featuring simultaneous AC operation and battery charging
- Rugged, lightweight, high impact resistant IP53 designed enclosure for wet outdoor applications.
- TDR method to prelocate very low resistance cable faults, either phase to phase or phase to neutral, or by pair comparison
- Arc Reflection Method (ARM®) prelocation of high resistance flashover faults.
- Single stage 500 Joule surge generator for pinpointing of high resistive faults up to 12kV
- DC testing for breakdown detection.
- Insulation resistance measurement.
- Sheath testing and sheath fault locating
Applications:
HV Testing (proof/insulation testing, sheath testing)
Used to test the dielectric strength of the cable or sheath insulation and, if the test fails, to determine the breakdown voltage. For this purpose a test voltage up to 12 kV (sheath test typically limited to 5kV) is applied to the cable under test indicating the resistance value.
Fault prelocation
After identifying the type of fault as high resistance/ flashover, prelocation of any concentric neutral type MV cable can be determined using ARM. In ARM, the arc of the flashover creates a temporary “jumper ” to the neutral ground. During this condition, a standard TDR measurement is made into what is basically a short circuit fault providing a negative reflection at the location of the fault.
Faults identified as very low resistance/non flashover in shielded cables can be prelocated using the TDR method.
Pinpoint fault location
Accurate pinpoint fault location of the typical high resistance/flashover faults is achieved using the “Thunder & Lightning” method whereby the 500 Joule surge generator (thumper) and an acoustic/electromagnetic receiver are used (Megger Digiphone Plus)
Specifications:
| Testing | 0 – 12 kV, 12 mA DC |
| Prelocation | TDR: Phased to Phase, Phase to Neutral, on screen comparison of up
to 256 pairs Range: 25,000 ft (7.6 km) Sampling Rate: 100 Mhz
Resolution: 2.5 ft @ 250 ft/ƒs 0.8 m @ 80 m/µs Arc Reflection: 0 – 12 kV |
| Pinpoint Fault Location | Surge: 0 - 12 kV @ 500 J Impulse Sequence: 5 - 10 seconds or single shot |
| Display | 5.7 in. (14.48 cm) HiBrite TFT Color LCD 640 x 480 pixel |
| Memory | 1000 traces |
| Interface | USB Port |
| Cable Supplied | 15 ft (4.5 m) HV flexible shielded cable 15 ft (4.5 m) safety ground cable 6 ft (1.8 m) AV supply lead set (US/Schuko/UK plug) |
| Terminations | T1 (typically North America): 14 mm male MC for HV output with
matching hotline clamp attachment; HV return and safety ground with
hooks and matching hotline clamp attachment. T2 (typically North America): same as T1, however, hotline clamp attachments for HV output and HV return are replaced by vise grip attachments. T3 (typically UK): The HV output and the HV return leads are terminated with hardwired battery clamps. T4 (typically all other countries): 10 mm female MC for HV output and HV return with matching battery clamp attachments, safety ground with hook and matching hotline clamp attachments |
| Supply | Battery: Internal 24 V NiMH Battery 5 AH Approx. 30 - 60 mins of
surge/thumping Approx. 3 hours recharge time Charger: Internal, 100-240 VAC – 24 VDC charger AC Line: 100 – 230 VAC ±50/60 Hz |
| Safety | Emergency stop Key-switch safety Interlock, standard (available also without) F-OHM detection /indication “proper grounding" |
| Environmental | Operating Temperature: -4° F to 122° F (-20° C to +50° C) Storage Temperature: -12° F to 160° F (-25° C to +70° C) |
| IP Rating | IP53 (with top open) |
| Weight | 71 (32 kgs) |
| Dimensions | 14 x 11 x 25 in. (35.5 x 28 x 64 cm) |