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Thermal imaging batteries
Thermal imaging locates hot spots by examining the IR spectrum. Heat is the enemy of batteries. A riseof just10°C willdeplete the lifeof a batteryby half. As molecules heat up,they move faster. This increases the rate of chemical reactions. This will increase the rate of oxidation that leads to corrosion. It will also increase the rate ofdry out in VRLA batteries. Heating will reduce the life of any battery regardless of the chemistry.
Published: 3 August 2020
TTRU3 Factory ratio testing of power transformer
Transformer equipment manufacturers (OEMs) have a critical need to measure true ratio, as they must confirm proper manufacture of their transformers during construction and final assembly. Improper construction has consequences of higher cost, late delivery, and poor quality. The ability of a ratio instrument to be used for all steps involved makes it a practical valueto OEMs because only one instrument is purchased and used throughout each stage. Only the most reliable and accurate instruments make it to the factory floor. Winding stack under constructionre used: Art Mandigo Winding Service.
Published: 3 August 2020
Testing frequency relays with SVERKER900 considering the IEC 60255-181 standard
This application note is more than a description of how to use SVERKER 900 for testing frequency relays. It also wantsto spread the knowledge about IEC standardization in relay protection. Many engineers often associate theIEC series of protection standards IEC 60255-1xx1to relay type testing, and believe that they do not need to have competence about this series of standards. This is a misunderstanding: many of the concepts, definitions and test procedures described in thestandards are there to be used in relay technique, no matter if the role is relay manufacturer, user, or commissioning / maintenance testing engineer (, ).
Published: 30 July 2020
DLRO2: long test lead test mode
When measuring very low resistance the four-wire test method has for many years been the standard method. The main advantage being that it simply and easily removes the resistance of the test leads from the measurement. However, what happens when those test leads need to be verylong?
Published: 27 July 2020
DLRO2: new difference meter
Introducing the first low resistance ohmmeter to feature a difference meter, a device that turns changes in resistance into a moving pointer and percentage change. When testing multiple similar connections, it makes it easy to spot those small increases in resistance that eventually turn into major faults.
Published: 27 July 2020
Introduction to thermal imaging
While spot infrared thermometers present only a single temperature at a single spot, Thermal Imaging Cameras give you the whole picture. Thermal imaging is the most effective method for finding problems or potential problems in a variety of applications across many fields.Thermal imagers allow users to measure temperature in applications where conventional sensors cannot be employed. Specifically, in cases dealing with moving objects (i.e., rollers, moving machinery, or a conveyor belt), or where non-contact measurements are required because of contamination or hazardous reasons (such as high voltage), where distances are too great, or where the temperatures to be measured are too high for thermocouples or other contact sensors. The thermal imagers provide an image, which shows the temperature difference of the object being measured. Hot spots can be seen immediately versus traditional infrared guns, which average the area being measured.
Published: 10 June 2020
One touch OLTC with the TTRU3
Completing turns ratio tests on all transformer taps can be a cumbersome process. With One Touch OLTC from the TTRU3, anyone can configure and test all taps within a few short minutes.
Published: 22 April 2020
Remote Operation of the MPQ1000 via Ethernet
We recieve feedback from many of our customers who use power quality (PQ) meters - including utilities, industrial and service providers. They have told us that one of the most important features of a PQ meter is the ability to control the unit and and view data remotely. Having to retrieve a unit from the field in order to download and then analyze the recorded data creates added expenses in time and resources.
Published: 7 April 2020
S1-1068 Performance at Power Grid Corporation of India in 765 kV charged substation
The Power Grid Corporation of India Limited (PGCIL) is an Indian state-owned company headquartered in Gurugram, North India and engaged mainly in Transmission of Power & transmits about 50% of the total power generated in India on its transmission network. The company owns and operates about 1,61,790 circuit kms of transmission lines at 800/765 kV, 400 kV, 220 kV & 132 kV EHVAC & +500 kV HVDC levels and 248 sub-stations. Also, it has the transformation capacity of about 3,96,825 MVA as on 30th November 2019.
Published: 2 April 2020