If the reading shows infinity then there is an open circuit. Required fields are marked *. Facts Everyone Should Know About Trailer Wires, 2 Important Distribution Transformer Testing Methods. It reflects the presence or absence of harmful contamination, dirt, moisture, and gross degradation. After connecting press the insulation test push button. Before going to test the cable disconnect the cable with all the devices.Ensure both ends of the cable are separated from each other. Ohms for every rating at 60°C for 11 KV and above. These days, Megger offers top-end systems for design and soil surveys as well as tough, easy-to-use testers for field engineers. Maintenance engineers use this parameter as an index of dryness of the insulation system. I am also a Civil Engineer and I am currently into Mechanical and Electrical works. 3. A Megohmmeter applies current for 1 minute through the cable before being measured and recorded. 4. The Megger values double itself for every 10°C fall in temperature. DC Ammeter : Construction, Working and Temperature Compensation, What is Shunt Capacitor Bank? Resistance is measured between Line and Earth terminals. Working of Megger. The test measurement values are affected by variables such as temperature, humidity, test voltage, and size of the transformer. VLF testing uses very low frequencies as part of an AC cable maintenance routine. Hany provided more than 3,500 hours of planning and project management training on his website planningengineer.net, YouTube channel, and offline courses since 2011. Hand crank the Megger to generate a high voltage, which causes a small current through and over the surface of the cable. In the event that there is still a problem or error with copyrighted material, the break of the copyright is unintentional and noncommercial and the material will be removed immediately upon presented proof. By identifying problems and keeping a record of these checks, Megger is able to adjust and improve upon its facilities. The small size and high power of the VLF tester helps to solve the practical problem of transmission loss during an AC test on very long sections of cable and apparatus in the field. VLF testing uses very low frequencies as part of an AC cable maintenance routine. in Egypt. You are an inspiration to me! Make sure that there is no Eddy current the device by earthing it. The procedure of the insulation resistance test are given below. The result of this can be measured in terms of Mega ohm. Considering the high voltage involved I need to clarify and propose and calculate the risk, probability and the severity of the works impact. Megger leads to be connected to LV and HV bushing studs to measure Insulation Resistance IR value in between the LV and HV windings. Megger leads to be connected to LV and HV bushing studs to measure Insulation Resistance IR value in between the LV and HV windings. Tag:cable, megger testing, method statement, method statement megger testing, test. 2. Please give me an answer. Perform Megger Test on each cable with respect to ground and adjacent cables. Somebody with hands on experience please help me on this one. Where to buy cheap cable for my welding plant? A Megger can also apply elevated voltage for prolonged periods to prototypes under development until they fail to evaluate a proposed design. What is welding cable? With the other ends of the circuit conductor open the value should be infinity for all the test. This combination of size and power makes Very Low Frequency cable testing perfect for testing longer sections of cable and apparatus. The test may be non-destructive for in-service equipment. AC is the standard used to transmit power worldwide, usually at a frequency of 50 or 60 Hertz. We use cookies to provide you with a better experience. Today Megger offers the finest line of 5 kV, 10 kV and 15 kV (dc) insulation resistance testers available anywhere. ELECTRICAL CONTINUITY TEST megger testing;-. He enjoys teaching project management in simple and practical way, and he developed several planning tools, techniques and courses. Your email address will not be published. In 2016, he established his own company in Egypt “Planning Engineer Est.” Hany gained his MSc degree in project management from Liverpool University-UK 2013-2016, PMP certified from PMI-USA 2010, and BSc Civil Engineer Tanta University-Egypt 2003. As a result, generating systems must supply enough energy to meet user demand as well as compensate for the large losses stemming from the transmission process. The test results shall be recorded in a format for Engineers reference and record. ISO 14004 establishes the guidelines to accomplish the requirements of ISO 14001. After knowing the IR value do not forget to switch off the supply. Keist holds a Bachelor of Arts in journalism and French. Which is indicated in the ohm meter’s indicator scale. Note: As a rough guide, the Megger values should be 2 meg. About Us | Contact Us | Terms of Service | Privacy Policy | Refund Policy. Megger Instrument shall be having valid calibration. Microsoft Power BI is the future of business intelligence (BI). 4 SCB Configurations, What is an Electrical Fuse? Megger range 500 V shall be used for Wire testing, Megger range 1000 V shall be used for Cable testing. The test values should be normalized to 20°C for comparison purposes. ISO 14001 requirements include identifying and controlling the environmental impact of an organization’s activities, products and services; improving the environmental performance of an organization’s activities, products and services; and implementing a systematic approach to settling environmental objectives and targets; achieving these goals and demonstrating that they have been achieved. The procedure of the insulation resistance test are given below. Copyright © 2020 Megger, all rights reserved. Megger Test Procedure. The high DC voltage passes a small current through and over the surface of the insulation being tested. Test and diagnostic system for the testing and condition analysis of medium voltage cables. Established by the International Organization for Standardization, ISO 9000 is a family of standards for “quality management systems.” ISO 9001 is the only standard in the 9000 family that can be certified. Megger-with range 500V/1000V shall be used for conducting the test. Insulation Resistance Test (IR Test) or Megger Test. For wires the circuit is tested, Megger range should be 500V. This advanced planning Package contains all the required knowledge to boost your career from junior planning engineer, site engineer with little planning and scheduling skills,... Data Management is the key success of construction projects reporting.