Ferranti Effect – Causes, Implications and Mitigations
Understanding and mitigating the Ferranti effect is crucial for the safe and efficient operation of long-distance power transmission systems.
The Ferranti effect is a phenomenon observed in long AC power transmission lines, where the voltage at the receiving end of the line becomes higher than the voltage at the sending end, particularly when the line is lightly loaded or unloaded....
Operating Transformers in Parallel
When power transformers are connected in parallel, the aim is to increase the overall capacity of the power system, provide redundancy, and ensure load-sharing among the transformers. However, successful parallel operation of transformers requires careful consideration of several factors.
1. Impedance Matching
Per Unit Impedance: The impedance of the transformers must be similar to ensure that the load is shared...
10 Key Considerations for Effective Electrical Design
Designing an effective electrical system involves creating plans and specifications that ensure the system operates efficiently and cost-effectively for its owner. This article will cover the 10 key considerations that should be integrated into an electrical system design.
These considerations include simplicity, flexibility, compatibility, code compliance and safety, protection / coordination / selectivity, reliability, maintenance, and energy conservation and efficiency....
Harmonics Limit – What is the difference between the IEC and IEEE?
The IEC (International Electrotechnical Commission) and IEEE (Institute of Electrical and Electronics Engineers) both have standards that address harmonics in electrical systems, but they differ in scope, methodology, and application.
Below is a comparison of their harmonics limits standards:
1. Scope and Application
- IEC Standards
- IEC 61000-3-2: Deals with the limits for harmonic current emissions (equipment with input current ≤ 16 A...
Circuit breakers with motor protective characteristics
Circuit breakers with motor protective characteristics, often referred to as Motor Protection Circuit Breakers (MPCBs), are specialized devices designed to protect electric motors from electrical faults and overloads. They combine the short-circuit and isolation functionality of Molded Case Circuit Breakers (MCCBs) with the motor overcurrent protection of traditional overload relays.
Circuit breakers with motor protective characteristics with thermal and time-delayed...
