Doble Engineering Company was founded in 1920 in Boston.

The products and services provided by Doble include the design and manufacture of high-voltage test equipment such as the TDR900, SFRA, Sweep Frequency Response Analyzer with the M5400, and the M4100 for testing such as The delta tangent and the power factor of a transformer. Moreover, the M4100 is the world leader in test cases for power transformers.

Doble is also famous in the United States with their relay test equipment, the F6150.

Recently, the company launched a new fantastic portable detector to detect partial discharges online, with the PDS100. This product has been a huge success because you can use it in a quick survey and of course online. So, no need to disconnect your high voltage device.

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  • Doble Engineering Partial Discharge Detector PDS200

    Doble PDS200

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    Doble PDS 200 Partial Discharge Detector Technical Specifications:

    The Doble PDS200 is a dual function instrument capable of analysing both EMI and RFI emissions from insulation and system defects using a variety of sensors.

    Buy. Lease. Rent. Partial Discharge Portable Detector : The Doble PDS200

    During a survey, the three presentation and analysis modes (Spectrum Analyzer, Time Resolved, and Level Meter) provide different ways to present and trend a frequency ‘signature’ of the defect and provide the analysis to fingerprint the defect.

    • Frequency Range : 50 kHz – 100 MHz
    • Accuracy : ± 10 kHz
    • Resolution Bandwidth (RBW) : 9 kHz / 120 kHz
    • Dimensions : 220 x 310 x 70 mm
    • Weight : 2.4 kg
    Price on Demand
  • Doble Engineering Partial Discharge PDS100 Front

    Doble PDS100

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    The Doble PDS100 Partial Discharge Surveyor is a radio frequency interference (RFI) surveying tool that is designed for partial discharge measurement in a live substation.

    Buy. Lease. Rent. Partial Discharge Online Detector : The Doble PDS100

    Without the need for outages, the PDS100 can detect partial discharge (PD) in just a few seconds – making it an ideal tool for a condition based maintenance program.

    Whole substations can be quickly surveyed and analyzed by simply walking around HV apparatus and using the PDS100 to detect and identify sources of PD and external interference.

    • Dimensions : 225 x 310 x 70 mm (without case)
    • Weight : 2.4 kg
    Price on Demand
  • Doble Engineering Partial Discharge DFA500 Front

    Doble DFA500

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    The Doble DFA500 is a radio frequency interference and acoustic signal analyzer used to discover early signs of insulation problems in GIS, SF6-filled dead-tank breakers and instrument transformers.

    Used during commissioning or while the equipment is in service, the DFA500 can detect flaws such as bouncing particles, protrusions, floating potentials as well as mechanical vibrations.

    Buy. Lease. Rent. Partial Discharge Portable Detector : The Doble DFA500

    The DFA500 is an ideal instrument for GIS commissioning tests and condition based maintenance programs.

    • Dimensions : 470 x 350 x 176 mm
    • Weight : 9 kg
    Price on Demand
  • Doble Engineering Partial Discharge DFA100 Front

    Doble DFA100

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    The DFA100 Dielectric Fault Analyzer is a handheld survey tool used to identify and locate partial discharge, particles, and mechanical defects.

    With three measuring modes, continuous, phase and pulse, the DFA100 uses its acoustic emission sensor to find in-service acoustic signals produced by partial discharge and loose components.

    Buy. Lease. Rent. Partial Discharge Portable Detector : The Doble DFA100

    As an option, the DFA100 can be used with insulated hot sticks for specific applications.

    You can use the DFA100 to detect faults in grounded SF6 gas-insulated systems, SF6-filled dead-tank circuit breakers, as well as grounded oil-filled instrument transformers and cable accessories.

    • Dimensions : 200 x 210 x 60 mm
    • Weight : 2 kg
    Price on Demand
  • Doble Engineering Partial Discharge DFA300 Front

    Doble DFA300

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    The Doble Partial discharge DFA300 is a dual function instrument capable of analysing either acoustic or
    RF emissions. There is a single input connection which can accept either a RF or an acoustic sensor.

    Buy. Lease. Rent. Partial Discharge Detector : The Doble DFA300

    Designed for surveying live, high voltage apparatus, its versatility makes it the perfect, multi-purpose tool for condition-based maintenance programs.

    • Dimensions : 425 x 284 x 155 mm (With case)
    • Weight : 6 kg 
    Price on Demand
  • Doble Engineering Domino USS Front

    Doble Domino USS

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    The Doble DOMINO USS (Ultimate Sampling System) gives you a fast, efficient way to measure water content in oil and/or the dewpoint of a gas.

    The DOMINO USS is a portable system that connects quickly and easily to transformer valves or other oil-filled electric devices.

    Operating on AC power supply or with its rechargeable battery, you will have accurate readings in six minutes or less.

    The DOMINO USS is customizable to your testing requirements, coming with either a moisture in oil test sensor, a moisture in gas (dewpoint) test sensor, or both.

    • Dimensions : 450 x 300 x 70 mm (with case)
    • Weight : 3 kg
    Price on Demand
  • Doble Engineering Partial Discharge PDSMART Front

    Doble PD Smart

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    Use the Doble PD-Smart for partial discharge testing for all types of in-service equipment including transformers, rotating machines, cables and switchgear.

    The PD-Smart works with Doble couplers or your existing, pre-installed couplers.

    Buy. Lease. Rent. Partial Discharge Portable: The Doble Pd-Smart

    The instrument is specially designed for calibrated electric partial discharge measurements according to IEC 60270 and has ultrahigh frequency (UHF) capabilities.

    Partial discharge activity is one of the leading indicators of insulation health and should be measured as part of a thorough condition assessment program.

    • Dimensions : 420 x 310 x 155 mm
    • Weight : 4 kg
    Price on Demand
  • Doble Engineering LCM50

    Doble LCM500

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    The Doble LCM500 Leakage Current Monitor can measure condition while a surge arrester is still in service, measuring the quality of the metal oxide blocks and helping manage the risk of failure.

    Buy. Lease. Rent. The Doble LCM500

    A surge arrester may be inexpensive, but it has an important role in protecting your transformers.

    With the LCM500 surge arrester test set, it takes less than 15 minutes to establish that your surge arresters are healthy and the transformer is still protected.

    • Dimensions : 300 x 200 x 120 mm
    • Weight : 3 kg
    Price on Demand
  • Doble Engineering Partial Discharge LDS 6 Front

    Doble LDS-6

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    The Doble LDS-6 is a highly sophisticated digital measuring system for partial discharge detection and analysis. It is trusted as a valuable partial discharge measuring tool for factory and laboratory testing.

    Buy. Lease. Rent. Partial Discharge Detector : The Doble LDS-6

    The Doble Lemke LDS-6 can be used to test a variety of high voltage apparatus. Use the LDS-6 to perform PD quality tests on motors, generators, transformers, MV and HV cable systems, switchgear and additional HV accessories.

    The Doble Lemke LDS-6 complies with IEC 60270, VDE 0434 as well as various IEEE and other standards.

    • Dimensions : 300 x 400 x 200 mm
    • Weight : 3 kg
    Price on Demand
  • Doble Engineering Partial Discharge EMI Front

    Doble EMI Surveyor

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    Doble’s EMI Surveyor is an in-service, EMI testing solution that can identify more than 70 different electrical and mechanical defects in generators, motors, bus duct and other high-voltage (HV) electrical plant equipment.

    The EMI Surveyor measures the release of electromagnetic (EMI) energy resulting from HV electrical insulation-related partial discharge defects, corona, random noise, as well as LV/HV mechanical conductor-related arcing defects and sparking.

    The EMI Surveyor includes all the accessories needed for a comprehensive EMI testing assessment: PDS200 spectrum analyzer, EMI sniffer, split-core high-frequency current transformer, wireless synchronization adapter and all required antennae and cables.

    • Dimensions : 450 x 300 x 250 mm (with case)
    • Weight : 6 kg
    Price on Demand
  • Doble Engineering  M4100

    Doble M4100

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    The Doble M4100 is the first choice for 12kV Tan Delta kit:

    • 12 kV Power Factor
    • 10 kV TTR
    • Winding Leakage Reactance
    • Dimensions : 508 x 641 x 250 mm
    • Weight : 45.5 kg
    Price on Demand
  • Doble Engineering M5400 SFRA Front

    Doble M5400

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    Use the Doble M5400 Sweep Frequency Response Analysis test set to investigate mechanical integrity of transformers, reactors and other equipment consisting of windings.

    Buy. Lease. Rent. Sweep Frequency Response Analysis: The Doble M5400.

    The Doble M5400 measures the frequency response at logarithmically spaced frequency intervals of 1.2%.

    • Dimensions : 560 x 350 x 180 mm
    • Weight : 5 kg 
    Price on Demand