PD-Guard/UHF

Product catalog summary

Overview
The Doble PD-Guard is a sophisticated device designed for continuous online monitoring of partial discharge (PD) in high voltage (HV) rotating machines and apparatus such as turbo generators, hydro generators, HV motors, transformers, and GIS. It is available in two configurations: the traditional PD-Guard and the PD-Guard/UHF, which can detect UHF signals.

Specifications
The PD-Guard can measure electrical transients up to 2MHz, while the PD-Guard/UHF can monitor UHF signals between 300 MHz and 2 GHz. The system is compliant with IP65 standards, ensuring durability in harsh environments.

Features

Advanced Analysis & Alarm Tools: Utilizes IEEE and IEC approved algorithms for fault diagnosis, with customizable alarm setpoints.
Rugged and Reliable: Complies with IP56 standards, suitable for harsh environments, and can be mounted in any position.
Interference Rejection: Features gating sensors and adjustable digital filters to minimize noise interference.
Scalable: The PD Monitoring Server can manage multiple PD-Guard units, each with a unique IP address.
Multi-Channel Acquisition: Capable of monitoring up to four channels simultaneously.

Applications
The PD-Guard is versatile, suitable for monitoring rotating machines, transformers, and insulated buswork. It provides real-time and historical data analysis, enabling early detection and prevention of potential failures.

Advanced Monitoring and Analysis
The system includes the PD-Guard monitoring unit and the PD Evaluation Server, which processes measurement jobs, generates alarms, and performs backups. The server connects via fiber optics to minimize noise, and the analysis software offers tools for characterizing and diagnosing PD activity.

Why Use PD-Guard?
The PD-Guard offers advanced noise suppression and signal processing, allowing for accurate PD detection and analysis. The UHF model provides additional benefits by using directional sensors to detect localized faults.

Service and Support
Doble offers service packages and lease options, including installation, diagnostics setup, and quarterly reviews. Replacement components and expert reviews are provided for leased systems.

Contact Information
For more information, contact [email protected]. Doble is certified ISO 9001:2000 and is part of ESCO Technologies Company.

Catalog excerpts

Microsoft Word - 2_Partial Discharge Measuring_Instruments_PD-SMART.doc table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:8.00pt "Arial", sans-serif; } .font1 { font:8.25pt "Arial", sans-serif; } .font2 { font:9.00pt "Arial", sans-serif; } .font3 { font:13.00pt "Arial", sans-serif; } .font4 { font:14.00pt "Franklin Gothic Medium", sans-serif; } Advanced & Reliable On-Line PD-Monitor PARTIAL DISCHARGE MONITOR The Doble PD-Guard is especially designed for on-line, highly sensitive continuous PD monitoring of three-phase high voltage rotating machines such as turbo generators, hydro generators and high voltage motors or other HV apparatus such as transformers and GIS. The PD-Guard is available in two configurations, the traditional PD-Guard for measuring electrical transients up to 2MHz and the PD-Guard/UHF which is capable of sensing UHF signals from antennae installed inside HV apparatus. This system complies with IP65 industry standards and can survive the harshest environments to include direct spray. A complete software suite is included for the analysis of PD activity so corrective action can be taken before failure occurs. (2§ Features Advanced Analysis & Alarm Tools Using internationally recognized algorithms approved by IEEE and IEC, the best possible diagnosis for fault conditions can be realized. These tools include Phi-Q-N, Phi-Q and Phi-N displays. Alarm setpoints can be set-up from the beginning and modified over time as normal operating conditions are learned. Rugged and Reliable This system complies with IP56 industry standards and can survive the harshest environments to include direct spray. The system can be mounted on a wall or rack in any position. Interference Rejection Nothing is more problematic than the interference caused by on-site noise, exciters and external interference. When used to monitor rotating machines, a gating sensor removes unwanted exciter noise from the signal before evaluation. Adjustable internal digital filter improve the rejection of interference and removes broadcasting frequencies. State of the Art With advanced noise rejection, pulse sequence recording and frequency domain signal conditioning, the unit can be used to make critical decisions with data you can trust. Scalable The PD Monitoring Server can act as the central hub to one or several PD-Guard monitors. Each PD-Guard has its own unique IP to identify it on the network. Multi-Channel Acquisition The PD-Guard can monitor up to four channels. The PD-Guard/UHF has the additional ability of monitoring UHF signals between 300 MHz and 2 GHz for deep localized fault detection. Multiple Applications The PD-Guard can be used to monitor rotating machines, transformers and insulated buswork.

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Microsoft Word - 2_Partial Discharge Measuring_Instruments_PD-SMART.doc table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:7.00pt "Arial", sans-serif; } .font2 { font:8.00pt "Arial", sans-serif; } .font3 { font:9.00pt "Arial", sans-serif; } .font4 { font:13.00pt "Arial", sans-serif; } Advanced Partial Discharge Monitoring The PD Guard includes the PD-Guard monitoring unit as well as the PD Evaluation Server. Together they provide all the tools necessary to read partial discharge sensors, monitor PD levels, and conduct analysis....

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Microsoft Word - 2_Partial Discharge Measuring_Instruments_PD-SMART.doc table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:3.00pt "Arial", sans-serif; } .font1 { font:5.00pt "Arial", sans-serif; } .font2 { font:8.00pt "Arial", sans-serif; } .font3 { font:9.00pt "Arial", sans-serif; } .font4 { font:10.00pt "Arial", sans-serif; } .font5 { font:13.00pt "Arial", sans-serif; } .font6 { font:24.00pt "Arial", sans-serif; } .font7 { font:4.00pt "Georgia", serif; } .font8 { font:12.00pt "Tahoma", sans-serif; } .font9 { font:9.00pt "Verdana", sans-serif; } Multiple Applications...

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Microsoft Word - 2_Partial Discharge Measuring_Instruments_PD-SMART.doc table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:7.00pt "Arial", sans-serif; } .font2 { font:8.00pt "Arial", sans-serif; } .font3 { font:9.00pt "Arial", sans-serif; } .font4 { font:13.00pt "Arial", sans-serif; } .font5 { font:6.00pt "Arial Black", sans-serif; } .font6 { font:5.00pt "Impact", sans-serif; } .font7 { font:9.00pt "Verdana", sans-serif; } Service Package or Lease Options Available To install the couplers and terminal box outside the casing...

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