2017
Sep
1
Motor Starter and Controller Types
2017
Sep
1
Testing and Commissioning Requirements for Switchgear
Before starting the switchgear testing an approved testing & commissioning engineer should be appointed in order to thoroughly review all the applicable drawings and specification, and to become totally familiar with all systems and the design intent. Experience certificate of T&C engineer to
2017
Aug
6
Air Blast Circuit Breaker | Construction & Operating Mechanism
A circuit breaker is a mechanical switching device, capable of making, carrying and breaking currents under normal circuit conditions. It is also capable of making and carrying currents for a specified time and breaking currents under specified abnormal circuit conditions, such as
2017
Aug
6
What is On Load Tap Changer OLTC in Transformers
A tap changer is a device fitted to power transformers for regulation of the output voltage to required levels. On-load tap-changers (OLTCs) are indispensable in regulating power transformers used in electrical energy networks and industrial applications. OLTC changer alters the turn ratios
2017
Aug
4
Dry Type Substation Transformers Technical Features
Most transformer companies offer standard engineered products only, and ask the users to make it fit their applications. Also these companies can engineer the product both electrically and mechanically to fit virtually any application. Typically companies employ three winding styles for Special Design
2017
Aug
4
Medium Voltage Indoor Dry Type Transformers Rating, Rated Voltage, Frequency and Ratio
The rated voltage ratio of the transformers at no load normally is specified at 50 Hz, this being related to the principal tapping of the transformer. Tapping shall be provided on the primary winding to provide a ratio variation of +7.5% and –2.5%