product
  • Sophisticated software allows you to diagnose, analyze and evaluate partial discharge in a timely manner
  • Advanced noise suppression tools – uses the well-known Doble Lemke noise gating technology including two separate channels for real hardware gating, with suppression of external noises via a gating sensor
  • Customizable design – the LDS-6 is a rack-mounted device that can be expanded to include an RIV pulse processing unit for transformer testing and a cable fault location unit
  • Perform PD quality tests on all types of high voltage apparatus, including motors, generators, transformers, MV and HV cable systems, switchgear and additional HV accessories
  • Rack-mounted device is ideal for commissioning and laboratory research

Calibrators

LDC-5 Calibrator

LDC-5 Calibrator

  • For external calibration of the standard PD measuring circuit according to IEC 60270
  • Quantifying of the main PD quantity “apparent charge”
  • Output for calibrating pulse charges: 5, 20, 100, 500 pC.
LDC-5/D Calibrator

LDC-5 /D Calibrator

  • Double impulse calibrator
  • For external calibration of the standard PD measuring circuit according to IEC 60270 (single pulses)
  • PD measurements on long cables and in accordance with standards requiring the verification of the double pulse behavior of the employed PD measuring system
  • Produces these standardized time parameters according to the IEC 855-3
  • Output for calibrating pulse charges (5, 20, 100, 500 pC)
 LDC-5_RIV

LDC-5/RIV

  • External RIV calibrator for standardized PD measuring circuit according to IEC 60270
  • Quantifies “apparent charge”
  • Magnitude of the calibrating pulses can be selected by the “Charge Magnitude” switch
 LDC-5_S2

LDC-5/S2

  • Charge injector designed for simulation of PD pulses, especially for on-site PD testing
  • Generates five different charge magnitudes, which appear at the 5 BNC-jacks
  • Calibrating charge can be fed into the terminals of test sample (according to IEC 60270 and DIN VDE 0434)

Sensors & Accessories

PDDC17-PD_COUPLER

PDDC-17 PD Decoupler

  • For use with rotating machines
  • Designed for PD signal transmission with a bandwidth above 30 MHz at 50 Ohm matching resistance
  • PD decoupling unit with integrated PD measuring impedance for decoupling of PD pulses from the standard PD measuring circuit acc. to IEC 60270
  • Voltage signal for phase resolved measurements
  • Composite PD and voltage signal, additive superimposed
PDDC24-FAILSAFEPD_COUPLER

PDDC-24 Failsafe & LF Coupler

  • For use with rotating machines.
  • Designed for PD signal transmission with a bandwidth above 30 MHz at 50 Ohm matching resistance
  • Transmits test voltage signals at the same wire
  • PD decoupling unit with integrated PD measuring impedance for decoupling of PD pulses from the standard PD measuring circuit according to IEC 60270
  • Voltage signal for phase resolved measurements
  • Composite PD and voltage signal, additive superimposed
  • Integrated high-voltage fuse
 BC Matching Unit

BC Matching Unit

  • For use with rotating machines
  • Works with your previously installed couplers for PD testing in rotating machines
  • Designed to adapt conventional PD measuring methods to the 80pF-Line coupler
  • Improves signals from existing couplers
  • Avoids outages that would be needed to replace high frequency couplers with low frequency couplers
 LDM-5_SP1_Splitting_Box

LDM-5/SP1

  • For use with PDDC range
  • Splitting box designed for PD/TV-signal transmission
  • Compact device with all input and output lines at the sides
  • Includes fast overvoltage protection to help prevent dangerous overvoltage due to unexpected breakdown of the test sample
 CONNECTION_BOX

Connection Boxes

  • For use with LDM-5/U5
  • Connection Boxes are designed for PD/TV-signal transmission and diplexing
  • Two and three channel connection box options
 HFCT300sensor 2207403000002

HFCT-300 Sensor

  • For use at cable terminations
  • Hand-held split-core sensor specially designed for coupling out high frequency PD-signals
  • Applicable for PD tests on any part of the PD signal loop between the insulation electrodes where the outgoing and incoming signals do not cancel each other out
  • For highly sensitive PD measurements with superposed line currents or high reactive currents (50/60 Hz) which can reach up to 300 A
 30dB UHF Sensor Pre-Amplifier

Sensor Pre-Amplifier

  • For use with all kind of UHF sensors
  • High sensitivity and high gain sensor amplifier
  • Special protection circuitry protects the input against excessive input power
  • Integrated soft start reduces the maximum peak current when powering up

Measuring Impedances

LDM-5_U5

LDM-5/U5

  • For cable and transformer testing
  • General use measuring impedance designed for the decoupling of the PD current pulses on the PD coupling capacitor, changing in equivalent voltage pulses and forwarding to the PD detector (according to IEC 60270)
  • Voltage signal for phase-resolved measurements by an internal low voltage capacitor for measuring test voltage and forwarding to PD test equipment
  • Output for test voltage value, derived from the coupling capacitor
  • No additional HV divider capacitor is necessary
  • With up to 2 switches for maximum 4 different coupling capacitances
 LDM-5U_RIV

LDM-5/U-RIV

  • For transformer testing
  • Designed for the decoupling of the PD current pulses on the PD coupling capacitor, changing in equivalent voltage pulses and forwarding to the PD detector (according to IEC 60270)
  • Connects to a bushing tap or a coupling capacitor
  • Low voltage capacitor for measuring test voltage and forwarding to PD test equipment
  • Voltage signal for phase-resolved measurements
  • Output for test voltage value, derived from the coupling capacitor
  • No additional HV divider capacitor is necessary

LDF-6/FU

  • To be used with LDM-5/U5
  • Band pass filter designed to improve electromagnetic compatibility in the measuring surroundings
  • Reduction of the disturbing influence of high frequency currents
  • Use between a measuring impedance and PD device
 CC1000-60

Coupling Capacitors

  • To be used with LDM-5/U5
  • The coupling capacitor connects the high voltage with the PD-measuring device
  • Mobile and equipped with the suitable security procedures
  • Capacitance 1 nF
    • CC1000/60: Rated Voltage 60 kV
    • CC1000/120: Rated Voltage 120 kV
  • Capacitance 10 nF
    • CC10000/50: Rated Voltage 50 kV.
 LDM-6_3

LDM-6/3

  • To be used with Coupling Capacitors
  • Designed for the decoupling of the PD current pulses on the PD coupling capacitor, changing in equivalent voltage pulses and forwarding to the PD detector (according to IEC 60270)
  • Voltage signal for phase-resolved measurements by an internal low voltage capacitor for measuring test voltage and forwarding to PD test equipment
  • Voltages decoupled from the bushing tap together with the PD signal
  • One signal output (TNC-socket) for voltage signal with added PD signal
 LDM-5_M6

LDM-5/M8 Switching Box

  • For use with specially designed LDS-6 control software
  • Signal switch, specially designed for PD applications
  • Stores all measured PD data for each channel separately (8 measuring files)
  • Can customize a test procedure (test time, sequence of activation of the measuring impedances)

Doble Client Committee Meetings & Conference

Doble Client Committee Meetings
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Doble Engineering Company

Doble Engineering Company