Underground Cable Fault Locator with Built-in - Exporter & Manufacturer, Kolkata, India

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Product Code : CFLNT02PS

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Product Specification

UNDER GROUND CABLE FAULT LOCATOR
With Built-in DC HV POWER SUPPLY

Type: CFLN 02PS

This is a portable unit combining the fault locating Bridge & Mains operated power source.

This Unit will be capable of locating the following types of faults

Short circuit faults.
Earth faults including High Resistance faults can be performed by HV DC Source.
Open circuit faults.

The kit is suitable to locate faults in all types of LT & HT armoured underground cables after going through pre location processes and have the following special features

Suitable for LT & HT cables.
Detection by Null technique.
Capable to overcome the effect of cable capacitance & foreign potential.
Since it is designed to work in potential distribution technique by selecting input impedances Earth fault of even high resistance value can be detected precisely.
Selecting input capacitance does precise detection of open circuit fault.
Power frequency (50 Hz) filter circuit is incorporated for higher noise immunity to adjacent live lines.
Isolated for High Voltage.

Technical features

SHORT CIRCUIT FAULT
Measurement in two-resistance section by null detection method. Indicates the distance of fault from the ends.

Current measurement
50 milli Amps. max.

Input Impedance selection
In multiple ranges.

Null Balance: By Vernier Potentiometer.

OPEN CIRCUIT FAULT
Measurement by Capacitance Bridge technique.

Built-in Power Source with the following technical details

Input: 230 V, 50Hz, 1 phase AC.
Output: Selectable in two ranges ie. 0-250Volts DC for low resistance fault or 2500Volts DC for High resistance fault.
Capacity: 50mA with built-in short circuit protection.

Output is featured with high impedance characteristic to have better control over measurement.

The Power Source is provided with the followings

Power Mains ON – OFF operation is done by means of an ON – OFF switch along with 'ON' lamp indication & Fuse protection.
'HT' ON – OFF push along with ‘HT ON’ lamp indication.
Continuously variable autotransformer of suitable capacity to increase the output test voltage up to the required voltage level.
Zero start interlocking will be provided to ensure that the HV circuit cannot be energized unless the regulator is initially kept or brought back to zero position.
Automatic tripping mechanism for protecting the DC HV Set against over loading. After tripping, High Voltage will be switched OFF.
If the voltage is raised beyond the maximum rated value a lamp & buzzer will indicate over voltage for DC output.
Output DC High Voltage is measured by means of properly designed Potential Divider and analog readout unit with proper scaling factor. The HV arm of potential divider is an integrated part of DC high voltage assembly.
Analog Milliammeter along with 'Press to read mA' push button switch for measurement of leakage current.

The Fault Locating Bridge and the Power Source are mounted within the same unit. The clearance between HT terminal & earth will be adequate as far as HT level is concerned.

The Power Source consists of HV Transformer, Capacitor Bank, Diode Bank, and Resistance Bank.

The DC HV Assembly used in the Test Set will be cast resin type and of suitable capacity, designed to withstand frequent intermittent spark over or short circuit conditions under which these are designed to operate.

DC High Voltage is generally obtained by multiplication of relatively low AC high voltage with proper multiplier circuits. High Voltage diode bank along with surge suppressor are used in conjunction with high voltage capacitors as multiplier circuits. The output will have series impedance for better control.

The Bridge and the HV assembly will be housed within a sheet metal cabinet powder coated.

Accessories
The set will be provided with input cable, discharge rod with grounding cable.

Documents
Operation Manual, Works Test Report, Warranty Certificate will be supplied along with the set.

Approx

Dimension (Length x Breadth x Height): 640mmX430mmx550mm
Weight: 35Kg.

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