AMPERIS PD Profiler Partial Discharge Monitor

Continuous insulation surveillance of transformers, switchgear and cables, without system shutdown

Partial discharge monitoring

PD Profiler

Partial discharge monitor

PD surveys on site or permanent integration: insulation condition monitoring for transformers, switchgear and cables.

Product overview

Partial discharge monitoring without interruptions

The PD Profiler continuously assesses the insulation of transformers, switchgear and cable systems by measuring partial discharge activity. Maintenance teams can take it into the field for on-site surveys or leave it permanently connected as part of a monitoring scheme that covers the whole network. Early knowledge of insulation defects — frequent in ageing MV and HV cable accessories and in secondary substations that usually remain unwatched — reduces downtime and allows maintenance to be planned according to the real condition of each asset.

Main advantages

• 8 to 20 PD channels with PrPD.phase-resolved analysis on every input to detect and classify discharge activity.
• Advanced interference management.configurable filters per channel and gating-based noise suppression for dependable readings.
• Scalable daisy-chain architecture.units link together for clean installations with minimal cabling and easy expansion.

• Installation without shutdown.strong magnets attach the unit to metallic cabinets; DIN-rail mounting is also available.
• Local alarm and SCADA.on PD activity an LED lights on the unit while the alarm status is sent to the control system.
• Onboard memory.several months of recordings are stored in the unit for long-term trend analysis.

Sensors and applications

SonoTEV Pro: acoustic and TEV in one sensor

The SonoTEV Pro combines ultrasonic acoustic detection with transient earth voltage (TEV) measurement in a compact, magnetically mounted housing. Versions for direct contact or airborne acoustic pick-up allow the sensor to be matched to each measuring point.

HFCT-HD: clamp for the ground return

HFCT-HD split-core clamp sensors monitor the cable ground return with high noise immunity and advanced filtering. Built in aluminium and weatherproof to IP66, they close with a spring latch and are supplied with 20 mm or 60 mm openings for quick installation.

Applications

• Distributed secondary MV substations, historically left out of monitoring programmes.
• Ageing MV and HV cable accessories, where partial discharge is most frequent.
• Transformers, switchgear and cable testing, in substations, field applications and remote sites.

• Occasional on-site surveys or permanent monitoring integrated into SCADA.

Software and monitoring

From measurement to diagnosis

Readings are presented as phase-resolved PrPD patterns, which reveal the nature of each discharge source, together with qualifying indicators and trend graphs that show how activity evolves over weeks or months. A geospatial view places every monitored asset on the map, and the recordings stored in the unit can be reviewed at any time, also from a mobile device.

Communications and integration

• Modbus IP, MQTT, REST API and USB interfaces for integration into existing systems.

• Configurable alarm contact output and alarm status reporting to SCADA.
• Daisy-chain communication between units for multi-cabinet coverage.

PD PROFILER — TECHNICAL SPECIFICATIONS

Available in several configurations, from 8 to 20 PD channels per unit.