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PD Alarm

The PD Alarm is an asset mounted device for indicating the presence of partial discharge in high voltage switchgear, ring main units (RMUs) and dry type transformers. Designed for use in small substations, the instrument can activate local and remote alarms in addition to local indication.

PD-Alarm in action

Key benefits

Swift deployment

Small design and magnetic coupling for ease of installation

Small and powerful

Compact design, but automated PD analysis

Web interface

PD Smart Hub software displays data and alarms remotely

Ensure accurate results

auto separation when the device detects background Noise instead of real PD

Local Alarms

local alarms and volt free contacts

Ease of use

control and configure with PD Alarm app

Spec sheet

PD Monitoring of:

  • MV Switchgear
  • Ring Main Units – RMU
  • Dry Type Transformers
  • Terminations
PD-Alarm ipec

Key Features

  • Display – Ultrasonic and TEV level displayed in dB
  • Alarms – Current ‘live’ alarms and historical alarms
  • TEV PD Detection – Measurement of electrical transients generated by internal PD
  • Ultrasonic PD Detection – 3 independent ultrasonic channels detecting surface PD
  • Integrated Noise Detection – Algorithm helps avoid ‘False Alarms’
  • PD Smart Hub data interface for remote analysis
ipec employee PD-Alarm

The Problem

In any network, the vast majority of assets are distributed via secondary substations taking HV down to LV for consumer supply. Often these assets are low in value but high in volume, therefore difficult to include in a condition monitoring programme;

Traditional monitoring is too expensive

Spot Testing cannot cover the high number of assets

IPEC’s new PD Alarm addresses this issue. Designed for large scale roll out it is now a cost effective system for PD monitoring over such a large asset base.

To highlight the intended sites in which the PD Alarm can be deployed, the diagram below shows the number of substations in a ‘typical’ large city. The PD Alarm is designed for these secondary substations, and is the only solution currently on the market for customers to monitor these assets cost effectively.

 

About the PD Alarm

The PD Alarm is an asset mounted device for indicating the presence of partial discharge in high voltage switchgear, ring main units (RMUs) and dry type transformers. Designed for use in small substations, the instrument can activate local and remote alarms in addition to local indication.

The PD Alarm is built into a tough case that magnetically mounts to the RMU. Installation is very quick and simple with only a power connection required to get the system operational. Alarms can be configured to operate either locally with SCADA or remotely using an optional integrated modem.

The system incorporates algorithms that distinguish noise from real PD, significantly reducing the likelihood of getting false alarms. The status and PD levels are displayed on a bright OLED display at the front of the unit.

Sensors

  • TEV – The Transient Earth Voltage transducer is external to the unit to measure internal PD
  • Ultrasonic – Ultrasonic sensors are connected to the unit and positioned around the substation
PD-Alarm set up

Noise Rejection

The PD Alarm applies effective noise rejection algorithms that can reliably distinguish between real PD and Noise. This means the system raises very few false alarms.

Communication and Alerts

The PD Alarm can send communications via 4G/5G or ethernet two methods. If the customer has local RTU’s installed, an alert can be sent via volt free contacts to the PLC connection and existing SCADA network.

  • PD Smart Hub data interface
  • 4G/5G Connection to central server
  • Ethernet – for wired network connection
  • Alerts via PD Smart Hub
  • Volt Free Relay Contacts – for local alarm systems
employees setting up PD-Alarm

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