• Monitor partial discharge and configure monitor via computer, tablet or web-enabled device
  • Works with a variety of sensors including antenna for airborne PD, CTs for individual or bundled conductors, UHF drain valve probes for in-tank applications and bushing tap connectors
  • Built-in Expert System learns PD behavior and indicates changes in frequency and/or severity of measured PD levels
  • Alarm relays for external notification
  • Broadband RF signal detection including peak, average and quasi-peak
  • Monitor PD in critical and high-risk assets
  • Save costly equipment by quickly reacting to rapid insulation deterioration warnings
  • Identify problem areas, diagnose the severity of the situation, plan action and intervention
  • Plan for further testing, maintenance and replacements in a proactive, risk management approach
  • Use as a standalone product, networked to existing SCADA system, or as part of a doblePRIME Condition Monitoring Platform




Pulse generator for sensitivity verification of PD measuring circuits operating in the UHF/VHF domain.

Sensors & accessories

HFCT TN80308

HFCT Sensor

  • Clip-on
  • 10 kHz – 200 MHz
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

LDWS-T sensor

For use at HV cable terminations.
  • For decoupling of PD signals (TNC-socket)
  • High impedance version
  • For ungrounded and grounded devices
 UHF DV sensor_DN5080 TN80322

UHF Drain Valve Sensor DN50/DN80

For use with HV Transformers.
  • Designed for decoupling of electromagnetic PD signals from inside of transformers
  • Sensor fits into DN 50 or DN 80 drain valves
  • Supports “Performance/ Sensitivity Check” where High frequency test pulses can be injected with further integrated electrodes
  • Grounded sensors (for low frequencies)

UHF PD Plate Sensor

For use with HV Transformers.
  • Used for the decoupling of electromagnetic UHF PD signals from the inside of the transformer tank
  • Designed to retrofit transformers that do not have oil flanges with free internal tubes
  • Can be installed on new transformers during manufacturing
  • Used for testing and optimizing mechanical properties such as oil-tightness, thermal withstanding of changing temperatures and pressure withstanding

GIS spacer sensor

UHF Spacer Sensor

For use in GIS.
  • Antenna for polymeric spacers or glass inspection windows
  • The sensor can be placed across a joint on a GIS to find evidence of partial discharge inside



Morgan Schaffer Calisto

Doble Engineering Company

Doble Engineering Company