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COMPAC 32D Cable Fault Locating System

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Description
Cable Fault Locating System COMPAC 32D is prime system to provide quick, effective, accurate and safe fault location. Specifically designed for service, industrial and power utility companies. It is a multi functional system in a trolley mounting design. The HV surge tester, DC High voltage test set, Arc reflection and Burn / Proof test is given for cable fault location of short circuit, open circuit, high resistance, and intermittent and sheath faults.
Pre-location
After identifying the type of fault, pre-location of fault can be determined using the latest pre-location methods such TDR, ICE/ICM, ARC/SIM, is provided in this system.
TDR Mode
A narrow electromagnetic pulse with a fast rise time is sent in the cable that reflects back from the fault point /far end where the impedance was change. The VOP for each cable depending on the cable dielectric material is set. The distance to the fault is then computed automatically and displayed on pre-locator.
ICE/ICM Mode
It is a current transient analysis method of pre-location of fault. During a breakdown or flashover at the fault, transient's waves are generated that oscillate back to the source end which is utilized through a linear current coupler and store and displayed on pre-locator.
ARC/SIM Mode
It is a arc stabilizing mode, faults are stabilized by creating a temporary arc at the fault point through an arc reflection filter and reduce the resistance value of fault as short circuit, and displayed on pre-locator with reference graph.
DC Test
Used to check the di-electric strength of insulation in the cable and prove the integrity to identify and confirm fault conditions with a test voltage up to 32kV and current of 24 mA. The over current trip is provided for protection to the system under test in the event of the cable under test breaking down.
Pin - Point
Accurate pin-pointing of cable fault is carried out using surge wave tester with the help of surge wave receiver in acoustic method. The maximum output voltage of 32 kV in three selectable 8, 16 and 32 kV ranges with 2000 Joules of energy.
Proof / Burn Test
Using the available DC high voltage of 32 kV outputs, the maximum current is applied for stabilizing the unstable cable faults. This allows easier and quick pre-location and pinpointing of the unstable faults.
Application
The Cable Fault Locating System COMPAC 32D is used to perform DC high pot test, Pre-location of fault distance with the help of pre-locator unit and Pin-point underground cable fault in acoustic method with the help of suitable Surge wave receiver and Pin-point sheath faults in power transmission and distribution networks or service provider companies.
Key Features
  • Optimized surge energy for switchable capacitors values for each range.
  • Pin-point location of cable faults in Low, Medium and High voltage cables by acoustic method.
  • Perform DC / Proof test up to 32 kV
  • Burn test up to 32 kV
  • Surge voltage selectable in ranges 8, 16 and 32 kV.
  • Full energy delivering capacity at each select range.
  • High energy of 2000 Joules
  • Adjustable output voltage from 0 to 100 % of selected range.
  • Single manual Impulse for pre-location of cable faults.
  • Cyclical pulse repetition for precise pin-pointing of cable faults in acoustic Method.
  • Fully protected operation with three safety interlocks.a
  • In-built current coupler for pre-location of cable faults distance on ICM/ICE mode.
  • Emergency OFF facility
  • Pre-location of cable faults distance with TDR, ICM/ICE, SIM/ARC mode.
  • Menu driven operation.
  • Interactive menu - guidance
  • Maximum measuring range up to 64km
  • 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 construction and easy to carry on site.
Working Principle
The HV surge tester SWT ignites an arc or spark at the fault. This results in a transient, i.e. a spreading and repeatedly reflected travailing wave between the fault and the surge wave generator. Inductive couplers record this transient wave with the help of a pre-locator unit and convert in to fault distance.
Surges of high energy are applied to the fault at the set voltage and time interval for pin-pointing the exact spot on the cable length.
Function
The COMPAC 32D is a variable DC high voltage power supply, connected to a high voltage capacitor bank. The value of capacitance is usually selectable by parallel, series 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 in surge mode.
These surges create noise and vibrations at the fault site. 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 SLE90 carried on the route of the cable on the pre-located area pin-point the exact spot of the fault in minimum time.
The high voltage DC test up to 32 kV is carried out to check the dielectric strength or insulation of cable on DC test mode. The respective voltage and leakage current is indicated on the meters.
In DC test mode the internal capacitor is isolated through a mode selection switch. 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 with different mode.
Standard Accessories
  • HV Output Cable 10 sq mm single core screen cable 25 meter length with heavy duty clamp wound on cable drum
  • Mains supply 1.5 sq. mm 3 core cable 25 meter length wound on cable drum
  • Yellow / Green 10 sq mm earthing cable 25 meter length with heavy duty clamp wound on cable drum
  • For Aux earth cable 25 meter length wound on cable drum
  • Soft discharge rod 35kV
  • Instruction / Operating Manual
  • Printer Software CD for Pre-locator
  • Rexin Cover
Standard Warranty One Year
Associated receiver use to pin-point cable faults Surge wave receiver SLE 200Z
Associated receiver use to pin-point sheath faults Earth Fault Locator EFL 1
Specifications
Operating Mode Surge, SIM, DC / Proof Test, Burning Pre-location, Sheath Fault
Surge Mode ARC / SIM Mode
Output Ranges 0 - 8, 16, 32 kV selectable & continuously variable
Output Energy 2000 Joules full energy at each range
Impulse Mode Single and Auto
Auto Impulse Sequence 1.5, 3 and 6 seconds intervals or as per customer request
Indication ON / OFF lamp indication Respective mode select lamp indication Analog moving coil meter for output voltage (kV) Indication Over Heat indication
Application Pre-location of high resistance intermittent faults
Working Voltage 35 kV max
Surge Carrying capacity 2000 Joules Max
Indication Visual lamp indication of ARC/SIM
ARC Stabilization Time 20 ms approx
HV DC Test Mode Sheath Fault Mode
Output Voltage 32 kV continuously variable
Output / Proof Test Current 6, 12, 18, 24mA
Sheath Fault 0-8kV current up to 220mA
Burn Mode
Burn Voltage 32kV
Burn Current 60mA for short period
Indication Analog moving coil meter for output voltage (kV) Indication Analog moving coil meter for output leakage current (mA) Indication Leakage current trip lamp indication
Protection Over current tripping
Pre-location
Operating Mode TDR, ARC/SIM, ICE/ICM
Distance measurement ranges, 120 km,
Sampling rate 500MHz
Gain -33 – 104dB
Output impedance (10 Ohm steps) 10 – 500 Ohm
Propagation velocity (v/2) 50.0 – 150.0m/μs
Pulse amplitude 45V
Pulse width 10ns – 100 000ns
Propagation velocity (V/2) resolution 0.1 m/us
Connectivity RS-485, USB
Internal data storage 4 Gb (not less than 1000 reflectograms with data)
Display Color LCD display
Internal battery 12 V (8 hours of operating when fully charged)
External power adaptor Input 230V 50 Hz Output 24 V DC
Power consumption 36 W max
General Specification
Power Supply 230V AC + 10%, 50/60Hz Single phase
Over Load Protection Input current Limiter switch Fast blow fuse in mains and controlled supply
Earth Discharge Soft automatic discharge through in-built solenoid
Operating Temp. 0 Deg C ~ 55 Deg C
Storage Temp. - 5 Deg C ~ 60 Deg C
Safety Protection Variac Zero inter-lock Output cable plugs inter-lock HV Switch inter-lock Mode Switch inter-lock Over Heat protection Emergency OFF switching
Dimensions. 670 (L) x 700 (W) x 1000 (H) mm with Rubber wheels
Weight. 215 Kg Approx.