Electrical Engineering Archives |

LSIG Protection in Circuit Breaker

In modern days, ACB/MCCB operated feeders are used with LSIG protection where all the feeder protections like Overload, Short Circuit, Instantaneous and Ground faults are covered. LSIG Protection in Circuit Breaker is an in-built feature of a Circuit Breaker. ETU i.e. Electronic Trip Unit is in-built module with ACB/MCCB feeders…

Cable Sizing Calculation (IEC Method)

Power cable sizing calculation is very important in any electrical distribution network. But it depends on the type of feeder which feeds the power to any load or power board. If not selected properly, electrical fault may occur and there may come a lot of consequences such as damaging the…

Power Factor Improvement by Shunt Capacitor Bank

Introduction to Power Factor Improvement by Shunt Capacitor Bank Power factor plays an important role in a power system network and it has a huge impact in commercial aspect also. Power factor is defined as the ratio of active power to apparent power. If the power factor of a power…

Protection CT Sizing Calculation Using IEC Method

Introduction for Protection CT Sizing Calculation During transient fault condition in power system network, if the protection CT gets saturated, it will mal-operate. To avoid CT saturation, CT sizing criteria or Protection CT Sizing Calculation Using IEC 60044 is required. If we look at the CT Magnetization Curve, we can…

Current Transformers Fundamentals

Current Transformers play an important role in AC power system for protection and measurement purposes. Current Transformers are classified into two different categories such as Protection CT and Measuring CT based on their applications in electrical power system network. But the protective relays and meters cannot be connected directly with…

Grounding in Power System Networks

Introduction to Grounding in Power System Networks Grounding in power system networks is required to discharge the fault current during fault condition. It also helps the protection system (relay & circuit breaker with the help of current transformer) to sense the fault and protect the system. There are two types…

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