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ETL40 Van Mounted Cable Fault Locating System

ETL40 Van Mounted Cable Fault Locating System is the most advanced system in power cable fault detection combining the best-in-market technologies into a single fully automatic centralized setup with high reliability and multi-level safety standards. The system is capable of locating faults on low & high voltage cables and pinpointing cable faults of cables with DC voltage up to 40kV.

ETL40 provides high energy of 2000 Joules at every surge level of 8/16/32 kV to enable locate & pinpoint faults on buried power cables, even at long distances or high depth.

FAULT PRE-LOCATION

 

The ETL-40 Cable Fault locating system is designed for testing & cable fault location depending on fault type and condition, using the following 5 distinct pre-locating modes:

Low Voltage Method:

- TDR Method:  low-resistance faults, measuring distance to a high resistance fault, distances to joints, 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, when fault resistance <200Ω

High Voltage Methods:

- ARC Reflection (single/multi shot)-  Precise distance to fault measurement creating a flashover at the fault location. Ideal for high-resistance and unstable faults with minimal harmful effects on a cable.

- Impulse Current (ICE) - for those high-resistance faults that cannot be converted to low-resistance by burning faulty insulation.

- Decay Method- Ideal for faults with high breakdown voltage

High energy of 2000 Joules at every surge level of 8/16/32 kV assures that faults can be located on cables up to long distances easily.

Burn Unit

ETL-40 systems are equipped as standard with a burn unit delivering up to 300 mA current at up to 1 A voltage. High-resistance cable faults may be converted to the low-resistance faults by burning faulting insulation, which allows to subsequently apply pre-location and/or pinpointing methods for precise fault localization.

The System is divided into two compartments: operator compartment (OC) and a high-voltage compartment (HC) keeping the operating person safe. Apart from this, the ETL40 is equipped with system self-health and safety monitoring- which are displayed in the centralized control unit screen along with possible resolutions. Visual indicators for Insulation resistance & leakage current present in control unit.

 

Optional Accessories: 50 watt low frequency surge generator which when used with a locating receiver- can trace cable routes precisely.

Specifications
Product Specification

 

 

 

High-voltage testing (DC)

 

Output voltage range

0…40kV

Output current range

0 ... 300 mA

Voltage adjustment type

Continuous

Indication

Digital output voltage and leakage current in real-time

Insulation resistance

Value displayed MΩ

Test timer

10sec…60 min

 

Fault conditioning (Burn)

 

Output voltage range

0 ... 20 kV

Output current range

0 ...1A

Voltage adjustment type

Continuous

Indication

Digital output voltage and leakage current in real-time

 

 

 

 

 

 

 

 

 

 

 

 

Fault pre-location 

 

 

 

 

Pre-location methods

·          TDR

·          ARC single shot

·          ARC multi-shot

·          ICE

·          DECAY

Measurement ranges (for shortening coefficient of 1.50 or V/2 = 100 m/μs)

0 ... 60 / 120 / 250 / 500 / 1000 / 2000 / 5000 / 10,000 / 20,000 50,000 / 120,000 m

Resolution:

▪ for shortening coefficient of 1.5 (v/2 = 100 m/μs)

▪ for shortening coefficient 1.87 (v/2 = 80.2 m/μs)

 

0.5m

0.4m

Distance measurement accuracy

0.2 % of the measurement range

Sampling rate

200MHz

Time Mark Accuracy

0.01%

Output impedance range

2 …100 Ω, resolution 2 Ω

Probe pulse parameters:

·  voltage

·  width range

 

45 V

10ns…100 μs

Gain range

- 21  to + 69 dB

Shortening coefficient range

0.750 to 3.000, resolution 0.001

Propagation velocity v/2 range

50.0 to 200.0 m/μs, resolution 0.1 m/μs

Probe pulse parameters:

·  Reflectograms with parameters

·  Data on cable shortening coefficients

 

1000

500

 

 

 

 

Fault pinpointing (Surge)

 

Surge Voltage range levels

0…..8kV

0…..16kV

0….32kV

Voltage adjustment within each level

Continuous

Surge energy at each level

2000 Joules in every voltage range

Surge rate

▪  Single discharge, manually triggered

▪  4 ... 12 surges/min, automatic mode

Indication

Digital output voltage in real-time

 

 

 

Controls and interfaces

Communication Interfaces

·         USB-A (user memory stick, formatted under FAT32)

·         USB-B (service only)

Graphical display

 

Option 1:  Built-in interface, 6” touchscreen display, 320 x 240 pixels

                 Option 2: RIF 9, 10.4” Display, touchscreen 800 x 600 pixels

Surge Voltage level switch

Yes

Internal memory

10,000 test results

Visual Indicators

 

High Voltage indicator

Leakage current indicator

 

 

 

Safety

Isolating transformer

4kVA

Continuous ground monitoring 

Auxiliary earthing for earthing monitoring and protection.

Step Voltage Monitoring

Van chassis potential control

Built-in Automatic safety Circuit breaker

Safety circuit breaker will cut the power to the System in the event of a short circuit.

Protection

Overvoltage, overcurrent, overheating protection

Safety Monitoring, Interlock & Emergency

On/Off key interlock to prevent unauthorized use of System, Emergency Stop button, Open rear door monitoring, Automatic discharge

Connecting Cables

HV Test Cable, in meters

50m

Power supply cable, in meters

50m

TDR Connecting cable, in meters

50m

Protective earthing cable, in meters, 10mm2

50m

Earthing control cable, in meters

15m

Power supply

Supply voltage

AC, 1 Ph, 230V +/10 % , 50 Hz

Power Consumption

2.5kVA

Physical

Weight

377kg

 

Features
Features
Direct measurement of insulation resistance & leakage current displayed
  • Centrally controlled, fully automatic cable fault locating system
  • Testing high-voltage cables with DC voltage up to 40 kV
  • Fault conditioning by burning faulty cable insulation with current up to 1 A @ 20 kV
  • Multiple Pre-locating cable fault modes with the reflectometer include:
  1.           Low-voltage pulse reflection method (TDR)
  2.           Arc reflection method (ARC single shot / ARC multi-shot)
  3.           Current pulse method (ICE)
  4.           High-voltage decay method (DECAY)
  • Automatic/ Manual Surge activation. Maximum output voltage can be set for particular surge procedure
  • Pinpointing cable faults with the acoustic method with 2000 J surge energy at every surge levels 8/16/32kV
  • Trace and pinpointing faults in power cable utility lines with the powerful low frequency generator LFG-50 50 Watt transmitter and cable and pipe locator PT-14 (optional)
  • High safety standards. High measurement reliability.
 
 
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