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Join Industrial Automation Engineering WhatsApp Group
Elec-Engg provides the group on WhatsApp platform for a large number of professionals all over the world to meet up, discuss and share updates related to Industrial Automation including PLC, SCADA, HMI, Drive, SERVO Systems, DCS, and Industrial Communications. Please read the following rules carefully and if you agree, leave a comment on this post,
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Test Sheet Template
All you need to do is to download these excel files and you can work with them straight away. These test sheets can be filled on your PC or can be printed and filled in by hand. These test sheets are not copyrighted so you can edit them, change them as you wish. GENERAL CHECK
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Restricted Earth fault Protection in Transformers & Generators
Transformers and Generators are voltage sources. They are traditionally protected by an Overcurrent + Earth fault relay, normally mounted in the breaker panel. It should be noted that this protection alone is not adequate. When an earth fault occurs within the zone defined as A in the following figure (Internal fault), or within the machine,
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How to test an electric motor?
General: Check the appearance of the motor; Check for body damage or damage to the cooling fan blade or shaft Manually rotate the shaft to check the bearing condition; Check for free & smooth rotation. Note the motor data from the motor NAMEPLATE Earth Continuity: Use your ohmmeter to verify the resistance between earth and
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Maintenance of Substation
General Philosophy In today’s competitive market scenarios, power utilities are under tremendous pressure to cut down their maintenance costs as they form a significant portion of the operation costs. This has led the utilities to adopt condition-based maintenance of the equipment rather than the usual preventive maintenance being carried out at a fixed interval of
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400kV SUBSTATION OVERALL SINGLE LINE DIAGRAM
Devices and description of this sample SLD 7RED 670: Main-1 Differential / Distance Protection 7SD522: Main-2 Differential / Distance Protection 7VK87: CB Fail Protection Relay with Backup DOC/DEF Protection for OHL bays1 7KE85: Disturbance Recorder 7SD82: Main-1/2 Cable Differential Protection 7UT82: Low Impedance Restricted Earth Fault Protection 7SJ82: CB Fail Protection Relay with Bac kup
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Overcurrent Protection Relay
Relay protection against the high current was the earliest relay protection mechanism to develop. From this basic method, the graded overcurrent relay protection system, discriminative short circuit protection, has been formulated. This should not be mixed with ‘overload’ relay protection, which typically utilizes relays that function in a time-related to some degree to the thermal
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