Trolley mounted System LOCOMP

 

Description

Telemetrics make trolley mounting cable fault locating LOCOMP system is a basic requirement of any power company. It is a very useful system to localize the underground power cable fault of any nature in short time in low voltage power cable network.

The system is designed for stand-alone operation. It includes a surge tester of full surge energy of 500 Joules with 2 & 4 kV selectable output voltage for continuous operation for pin-pointing of cable faults. 

Its flexible systems is equipped with mounted cable fault pre-locator with the TDR (Time Doman Reflectometer) mode for prelocation of fault distance and highly sensitive surge wave receiver are use for pin-point cable faults.

 

Application

The cable fault locating system LOCOMP is used to pre-location of fault distance with the help of pre-locator and pin-point cable fault using surge tester in acoustic method with the help of surge wave receiver in low voltage power cable network.

 

Working Principle

After successful pre-location of fault distance, surges of high energy are applied to the fault at set voltage and with impulse time interval for pin-pointing the exact point of the cable fault. These surges create noise and vibrations at the fault point. The intensity of the noise and vibrations get attenuated during their travel to the ground surface. A ground microphone and a sensitive surge wave receiver carried on the route of the cable at pre-located area and pin-point the exact spot of the fault in minimum time.

 

Function

The system is used to pin-point of cable faults location in Low voltage power cable. It is basically a variable DC high voltage power supply, connected to a high voltage capacitor bank. The value of capacitance is usually selectable by parallel and series combination. This combination being linked with suitable voltage taping to give the constant energy output on low voltage / high capacitance or high voltage / low capacitance. This high voltage output is applied to the cable under test through a spark discharge device. 
The cable fault pre-locator is a microprocessor based equipment and can be used to pre-locate fault distance of faults in TDR mode.

 

Features

 

Optimized surge energy for switchable capacitors values for each range.

 

Pin-point location of cable faults in Low voltage cables by acoustic method.

 

Output voltage selectable in two ranges 2 and 4 kV.

 

Full energy delivering capacity at each selected range.

 

High energy output of 500 Joules.

 

Adjustable output voltage from 0 to 100 % of selected range.

 

Single manual Impulse.

 

Cyclical pulse repetition for precise pin-pointing of cable faults in Acoustic Method.

 

Fully protected operation of surge tester with safety interlocks.

 

Pre-location of cable faults distance with TDR method.

 

Maximum range of 8 km for pre-location of cable faults.

 

Auto / Manual mode for pre-location of cable faults.

 

Automatic discharging facility of cable under test, in case of power failure or after switching off.

 

Continues operation for extended period in case of pin-point difficult cable faults.

 

 

Rugged trolley mounting system for easy to carry on site.

 

Specifications

 

A) Surge Tester SWT4

 

Output Ranges

0-2 & 4 kV

 

Energy Output

500 Joules full Energy at each Range

 

Impulse Mode

Single and Auto

 

Auto impulse Sequence

4, 8 Seconds intervals OR as per customer request

 

Indication

1) On/off lamp indication
2) Analog moving coil meter for output voltage (kV) Indication

 

Protection

1) Variac Zero inter-lock
2) HV Switch inter-lock
3) Over Heat Protection
4) Input current Limiter MCB

 

Operating Time

2 hours continuous

 

Earth Discharge

Soft automatic discharge through in-built solenoid

 

B) Cable fault pre-locator TFL5

 

Fault Distance Range

8 km (280m, 480m, 1000m, 2000m,4000m, 8000m)

 

Measurement Mode

TDR (Time domain Reflectometer)

 

Fault Measurement Accuracy

1meter

 

Pulse Width

40ns---10us

 

Pulse Waveform

Two polarity pulse

 

Pulse Amplitude

0-30V

 

Cable Constant (VOP) range

100-300

 

Impedance matching

Automatic

 

Gain adjustment

Automatic and manual

 

Testing accuracy

+/- 1%×cable length

 

Measurement dead zone

0 Meter

 

Auto Measurement dead zone

0 Meter

 

Output Impedance

25-120Ω adaptive

 

Sampling Speed

100 MHz

 

Memory Location

U-disk

 

Serial port for PC / Printer

USB

 

Resolution

1 Meter

 

Gain Range Control

0-9

 

Display Readout

Color LCD and 480*280

 

Charging time

3 hours

 

Continued operating time

8 hours

 

C)Surge wave receiver SLE90

 

Power supply

1.5 V X 8 AA size batteries

 

Operating Time

More than 12 hrs. Continuous

 

Working Channels

Acoustic and magnetic

 

Acoustic Channel

Broad band filter 70 - 3000 Hz

 

Magnetic Channel

9820 Hz, +/- 10 Hz bandwidth filter

 

Indication

1) Dual LCD bar-graph display to indicate the levels of acoustic and Magnetic channels
2) Battery checks status
3) Peak hold signal level bar on LCD

 

Gain

More than 90 dB for both magnetic and acoustic channels

 

Input Impendence

500 Ohm for ground microphone

 

Output Impendence

500 Ohm for ground microphone

 

Weight

1.5 kg With batteries

 

Dimensions

240 (L) x 80 (H) x 190 (D) mm

 

Standard accessories

1) Ground microphone MIC–S 
2) Headphone 
3) Connecting cable 
4) Caring stick

 

D) Accessories

 

Accessories

1) 15 meter 6 sq mm Single core screen output HV cable with heavy duty Brass clamps.
2) 15 meter mains supply connecting cable.
3) 15 meter yellow/green earthing cable.
4) 5 meter BNC to crocodile for TDR measurements

 

E) General Specifications

 

Power Supply

230V AC + 10%, 50Hz single phase

 

Operating Temperature

0oC to 55oC

 

Storage Temperature

- 5oC to 60oC

 

Dimensions

800 (L) x 672 (W) x 950 (H) mm with caster wheels

 

Weight

90 Kg Approx

 

Standard Warranty - One Year

Other Standard Models -

HT Cable fault locating system Model: HIGHCOMP16