Partial Discharge Detector PXDP-II

The partial discharge meter PXDP-II is a portable device that performs the detection and measurement of partial discharges in electrical devices or components. Registers partial discharge measurements for analysis and diagnosis through optional software for PC. The PXDP-II can be used in several applications and complies with IEC 60270.

This measurement system is a powerful and flexible partial discharge measurement tool. Early detection of failures in development and timely repair improves the reliability of the network and is a cost-effective way to manage maintenance. The partial discharge test is a powerful predictive and qualitative analysis tool that warns of a possible future failure of the system.

It shows the waveform of partial discharge and incorporates a loudspeaker that reproduces a sound of the measured signal (the equipment records and stores the measurements, date and time of reading).

The use of the equipment has been extended for the diagnosis in industries and laboratories. The PXDP-II is an extremely powerful device for the detection and measurement of partial discharges when used with a high voltage source with a very low noise level and a high frequency capacitive coupler. It is an economic and very precise solution for the detection and measurement of partial discharges in accessories and components such as transformers, circuit breakers and lightning conductors.

This partial discharge meter is the most effective and economical solution for the inspection of splices and elbows in the electrical network.

 

Applications

• Quality control of medium and high voltage equipment (transformers, switches, suppressors, insulators, couplers, etc.)
• Quality control of the insulators during the installation or repair of the underground network (cable joints, elbows, etc.)
• Monitoring the deterioration of the insulation of critical components (transformers, switches, cable joints, etc.)
• Safety control before work under load.
• VTE testing in switchgear cabinets and PD detection in switchgear using the VIS capacitive coupler.
• Corona and arc detection in aerial devices that use the acoustic sensor and PD detection in a transformer filled with oil using a UHF antenna / HFCT clamp.Quality control of MV/HV equipment on production line (transformers, switchgears, etc.)

The use of the PXDP-II can be integrated to be part of a preventive maintenance program, thus avoiding problems and interruptions of the electrical networks. The PXDP-II is a very precise and flexible equipment. Its system of extension to long bands allows an accurate detection of the activity level of the partial discharges. The meter uses a high speed detection technique which allows the equipment to be very powerful. In addition, it is possible to record the download measurement in graphic or auditory form, with the date and time of reading. The equipment allows you to operate your registry in the same location. The recorded measurements remain in memory even when the PXDP-II is turned off, allowing the transfer of these records to a computer.

 

Advantages of the PXDP-II

• Easy to use, versatile, rugged design for outdoor applications, lightweight and portable. It works with batteries.
• Verification of the splices under normal load of the electrical network.
• Multiple modes of use, analysis and on-site diagnosis in real time (visualization of the peak value).
• Display of the pC and dB values.
• Internal memory that stores: the waveform, the edge of PD, the date and time. Transfer of registered data to a PC to guarantee the monitoring of the measurements (it allows exporting the results to an expert via a computer connected to the Internet). Calibration mode in pC.
• Network synchronization for random noise reduction
• Differential technique for noise reduction.
• Scalable, expandable and exportable analysis database.

 

Diagnostics under tension at the same site of the analysis:

• The PXDP-II uses capacitive and inductive probes, which allows the detection and analysis of partial discharges on cable accessories (splices and cable terminals).
• The PXDP-II uses a two-phase coupler on the circuit breakers for fast and efficient detection of high internal frequencies generated by partial discharges.

 

 

To consider:

-The PXDP-SOFT software allows to manage and visualize records of partial discharges, downloading the readings from the internal memory of the computer to the PC.

• It allows transfer of the waveforms registered with the equipment.
• Facilitates the management of records.
• It allows to listen to the recorded audio to identify the PD.

 

-Metal-Clad boards are easily inspected with the PXDP-II and its accessories:

• The TEV sensor detects the transient voltage rise to ground on the surface of the metal cabinet produced by the electromagnetic waves that produce the partial discharges.
• The acoustic sensor detects ultrasonic waves produced by partial discharges inside the cabinet. It allows detecting PD in transformers, capacitors, boards, etc.
• The VIS voltage indicator is connected to the PXDP-II by the two-phase coupler, to detect PD in synchronization with the network phase. It allows the detection of PD in capacitive ports.

-The ULD-401 parabolic sensor in the PXDP-II unit detects and locates the corona effect in any device at high altitude, which reveals the presence of partial and contaminant discharges.

-A capacitive sensor detects PD in cable joints and elbows. The capacitive sensor kit is coupled to the reference module (this module allows you to test the sensor before inspecting the cable). Thanks to the handle that is screwed to the sensor, the user wins in safety.

-The PXDP-II off-line kit allows testing a large number of medium and high voltage devices (such as couplers, cables, insulators, transformers, etc.) to detect DP for off-line testing. Rapidly identifies problems of design, manufacturing or operation, improving the design and reliability of the network (which reduces operating costs when installing reliable devices).

As an optional module, we highlight the synchronization module with the phase of the network, allowing to attenuate the noise (important parameter to attenuate to identify partial discharges). The synchronization is designed for TEV, acoustic, with HFCT, splices and elbows, etc.

 

Detection of:

• Corona effect: thanks to the parabolic sensor, the PXDP-II captures the emitted ultrasound (dB) and performs a sweep of the area to be analyzed, locates with great accuracy: partial discharges, electric arcs and corona effect.
• Detection of DP through grounding conductors (HFCT clamps): the HFCT-20 and HFCT-60 sensors are used to detect PD, manufactured to resist abrasion and mechanical impacts in any environment, its design provides excellent insulation against high frequency interference (they measure currents up to 100 MHz).

 

Display on the equipment display of the peak value:

PXDP II - picoCoulomb

[PXDP II picoCoulomb mode]	[PXDP II picoCoulomb mode detail]

PXDP II - View

[PXDP II]	[PXDP II]

 

Technical specifications:

• Simultaneous display in dB and in pC.
• Display of the peak value.
• Peak detection by fast numerical circuits.
• Fast numerical processor (DSP) for instant analysis of results.
• Analysis of the angle shape in high frequency to determine the proximity.
• Reception on a wide band, without deformation or attenuation of the discharge impulses.
• PC interface (Windows) for the analysis of the results.

Optional accessories:

• Capacitive probe (spatula)
• Differential spatula
• Inductive probe
• Capacitive couplers
• Reference modules in pC
• Bi-phasic coupler
• LP filters
• Logicial PXDPII
• Source up to 45 Kv
• Suitcase for transport in ABS
• Protective case in nylon

 

PXDP-II-LT  VERSION

It is a portable device that allows the detection of partial discharges in cable joints and elbows, circuit breakers, acoustic tests, TEV, rotating machines, etc. It is a user-friendly, versatile, lightweight and portable device; based on PXDP-II technology
The XDP-II-LT has an amplification system of ultra-bandwidth that allows to measure the activity of the PD. The XDP-II-LT shows the PD waveform during the measurement and displays the noise before filtering to help the user recognize PD of the noise (uses a high-speed detection technique).

Applications:

• PXDP-II-LT + capacitive antenna: perfect tool for measuring partial discharges in cable joints and elbows.
• PXDP-II-LT + acoustic converter: allows the detection of corona effect, arcing detection, detection of partial partial discharges in switchgear cabinets, air leaks detection, etc.
• PXDP-II-LT + TEV probe or two-phase coupler: maintenance and prevention of distribution cabinets using VIS capacitive couplers.
• PXDP-II-LT + UHF antenna: allows the detection of PD in any oil-filled transformer.
• More applications available, check with our technicians.

 

Characteristics:

• Display the waveform of the PD
• Ability to synchronize with the network.
• LCD screen

Optional accessories:

• Capacitive sensor
• HFCT clamps
• Low pass filters
• Protective case
• Acoustic converter
• Synchronization module
• Parabolic sensor
• Contact probe

        

 Checking DP in joint cables with capacitive probe.