Learn Electrical Engineering
Understand ratings of electrical equipment — voltage, current, frequency, and insulation levels that define performance and safe operation limits.
For Battery Sizing Calculation First, we consider a single battery bank for DC power for the entire substation. In our case, the DC system is 220V; hence, we first set the voltage rating of our battery to 220V. Here, we need to note for future extension of the substation. Because once we installed the battery … Read more
Electrical equipment is designed to handle different types of current, and there are mainly three types of current ratings that apply to it: Normal Current Rating, Short Circuit Current Rating (for a specific time period), and Dynamic Current Rating. Let’s explain these in simple terms: Normal Current Rating The normal current rating of electrical equipment … Read more
What is Normal Current Rating? This is the current represented in its RMS value. Electrical equipment can carry this current continuously without being overheated and without losing its desired performance. According to IC 62271, the definition of normal current rating of electrical equipment is the rated normal rms current that the electrical equipment can carry … Read more
In addition to the normal current rating of a circuit breaker (which is the current it can handle continuously during regular operation), there are two important categories of short-circuit current ratings that define how the circuit breaker performs during fault conditions: Rated Short Circuit Breaking Current The short-circuit breaking current of a circuit breaker consists … Read more
A high voltage circuit breaker plays a crucial role in power systems by protecting electrical equipment from damage due to electrical faults in the system. One of the key challenges in circuit breaker design is dealing with the transient recovery voltage (TRV), a phenomenon that occurs immediately after current interruption. When a fault current gets … Read more
A Circuit breaker is an essential component in electrical power system. It is designed to interrupt fault currents and hence protect equipment from damage. A crucial aspect of their performance is the duty cycle. The duty cycle defines the operational requirements and limitations of the breaker in terms of repeated opening and closing operations. Whenever … Read more
Each high-voltage equipment requires adequate insulation to operate safely, reliably, and efficiently. Rated insulation levels indicate the amount of stress the insulation can handle during lightning strikes, sudden electrical surges, or power overloads. The IEC and Indian Standards (IS: 13118) have established clear global rules for these insulation levels to ensure consistent operation. Actually, an … Read more
Rated Voltage: 36kV Rated Insulation Level: