应用指南

Fault location with the ETF 3

The 3kV energy separation filter (ETF 3) is specially developed for fault location on symmetrical communication and pilot cables. This article covers the technology and best way to use the ETF 3, as well as field examples of the the system in use.

Sheath testing for fault location

Water ingress caused by damaged cable sheaths is a leading cause of faults in plastic-sheathed cables. Proper cable maintenance through sheath testing can extend the life of the cable by preventing the long term damage caused by water ingress. This article covers best practices and best equipment to use when sheath testing.

Pre-location transient methods

Learn more about the behaviour of transiet waves when a breakdown occurs at a cable fault, and understand how to evaluate and measure these transients for a more efficient fault location process. This article covers both DECAY (voltage decoupling) and ICE (current decoupling)

Pre-location pulse reflection process

Learn more about the interaction between pre-locaation and pinpointing to minimise fault location time. pre-location methods referrenced include TDR and HV methods. Additionally, this document discusses the values a fault must exhibit to be located by pulse reflection. 

Pre-location ICE method

The four most effective impulse current (ICE) methods for high resistance and intermittent power cable faults are "Direct mode", "Comparison mode", "Differential-comparison mode", Loop-on/Loop-off mode". The following document discusses the the process of each method.

Pre-location with ARM arc reflection technology

Understanding the most common fault types is critical to cable fault location. More than 80% of cable faults are high impedance faults. This document breaks down the properties of the high impedance fault, and discusses the most effective way to deal with them through Arc Reflection (ARM) technologies. 

Fault location on power cables

Gain insight into specialised fault location and pinpointing proceedures for high voltage power lines. Look at the construction of high voltage cables, as well as the methods and practices that are becoming new the standard, such as condition based preventative maintenance. 

Fault location in low voltage networks

Discover key strategies when conducting fault location on low voltage cables. Inluded are typical LV behaviours, advantages and disadvantages of LV testing, different test methods and best practices. 

Battery Ohmic Data Analysis

After we gather the impedance data what do we do with it? How do we make sense of it? A battery string consists of more than just batteries. All aspects of it need to be examined. 

Measuring Jars with Multiple Cells using PowerDB

A battery consists of a jar that can contain multiple cells. When performing battery testing, it is recommended to take measurement on the individual cell if possible. However, with most batteries it is only possible to take measurements on the jar. Since this is the smallest unit that can be replaced, this makes sense. Yet some batteries that have multiple cells also have multiple posts that allow for the measurements of the cells within the jar. For this reason we allow PowerDB to be configured for this application and this paper explains how to do that.

Setting Chart Limits Power DB

This paper looks at how to change graphs and charts when using the PowerDB LITE.

Field Calibration Verification

Each Megger BITE product can measure internal cell impedance, inter-cell connection resistance and DC voltage of cells and jars. This paper looks at how the BITE can be checked in the field for calibration validity to ensure quality of the data generated.

Battery Inter-cell Resistance Measurements

This document discusses the nuances of inter-cell connection measurements, as well as best practices for the entire measurement process. Included are diagrams outlining the measurement structure so that you get consistantly reliable results. 

Using battery test equipment with asset management software

Lost data records can be a problem for major power utilities. Using the right test equipment with modern asset management software can help to ensure that consumers are never without power.

The batteries that radar UPS systems depend on need regular testing to ensure that the skies stay safe

Batteries play a crucial role in ensuring that air traffic control systems around the world can continue to operate reliably and safely even if there is a failure of the mains supply at the radar stations on which they rely. It is imperative, therefore, that those batteries should be maintained in good condition, with potential problems detected and remedied before they can develop into outright failures.

Testing for ground faults on storage batteries

Identifying faults in storage batteries can be problematic. Using a test signal frequency in the range 20 Hz to 30 Hz can minimise interruption from ‘phantom’ faults in batteries.

Battery Inter-cell Resistance Measurements

This document discusses the nuances of inter-cell connection measurements, as well as best practices for the entire measurement process. Included are diagrams outlining the measurement structure so that you get consistantly reliable results. 

Impedance: it correlates to battery capacity

There has been much talk about whether impedance (and other internal ohmic tests) truly correlates to battery capacity. This paper endeavours to show you how it does.

Internal Impedance of Batteries - What it is and Why it Works

CATIV instrument rating

Structured Cable Certification Tests

The “ART” of earth electrode testing - Megger DET3TC with ICLAMP option

Clamp On electrode testing methods - DET4TC and DET4TCR with ICLAMP and VCLAMP

Earth leakage clamp applications

Earth leakage tests of portable appliances

Parallel Earth Paths

Stake-less earth/ground testing with DET14C and DET24C clamps

Working with Fault Monitors

5 KV and 10 KV insulation testing

DELTA4000 12 kV Insulation Diagnostic System application guide

Diagnostic insulation testing digest 5 and 10 k V

Dielectric Discharge Test

Interfacing MIT525, MIT1025 to PowerDB

Automatic derivation of R1 + R2 values

Loop Testing Techniques

MFT1700 Loop Testing Options

Checking isolation of low voltage circuits

PAT testing IT equipment

Portable appliance testing

Testing 110V Appliances

Earth continuity in PAT testing

PAT testing surge protected equipment

Power factor testing for circuit breakers

Power factor testing of bushings

Power factor testing of cables and potheads

Power factor testing of circuit breakers

Power factor testing of power & distribution transformers

Power factor testing of surge (lighting) arresters

Introduction to Harmonics

PA9 component failures

PA9 component failures - UTILITIES

PA9 computer problems - RESIDENTIAL

PA9 computer problems V2

PA9 dimming lights

PA9 equipment tripping

PA9 equipment tripping out - INDUSTRIAL

PA9 fast clocks

PA9 fast running clocks - RESIDENTIAL

PA9 Flicker

PA9 Flicker - RESIDENTIAL

PA9 formatting Gigabyte flash cards Dec 2007

PA9 Lights dimming and surging - RESIDENTIAL

PA9 motors

PA9 motors - INDUSTRIAL

PA9 neutral overheat

PA9 neutral overheating - UTILITIES

PA9 resetting a watchdog timer

PA9 Switchgear

PA9 Switchgear - UTILITIES

PA9 Transformers

PA9 Transformers - UTILITIES

PA9 Tripping breakers - INDUSTRIAL

PA9 Tripping breakers - UTILITIES

PA9 Tripping breakers 1

PA9 Tripping breakers 2

PA9 Tripping breakers 3

PA9 UPS

PA9 UPS - INDUSTRIAL

PA9 wavy CRT

PA9 wavy CRT - RESIDENTIAL

RCD testing options

Testing appliances fitted with RCDs

Controlling the MPRT with an external source

TDR Basic operation

Time Domain Reflectometers - Applications

Testing three phase systems

Testing on 110V systems

Study on aging degree and moisture content assessment methods of oil-paper in transformer based on FDS

The moisture content of oil paper insulation system assessment is an important link in transformer fault diagnosis. This paper looks into the methods of assessing the moisture content of oil paper insulation as well as the degree of insulation aging. 

TTR calibration and functionality tests