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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
What is a High Voltage Circuit Breaker? A High Voltage Circuit Breaker (HVCB) is a crucial component in power transmission and distribution networks. Its primary role is to protect electrical equipment by interrupting fault currents within the system. Beyond safeguarding equipment, HVCBs are vital for maintaining the integrity of the power grid. They isolate faults … Read more
When it comes to high-voltage power systems, current transformers (CTs) play a critical role in measurement and protection. CTs come in two main designs—Live Tank and Dead Tank? While both serve the same fundamental purpose, they differ significantly in construction. The main differences between a live tank and a dead tank current transformer (CT) primarily … Read more
A busbar is a critical component in a power substation, ensuring the proper connection of all incoming and outgoing feeders to a single voltage level system. Obviously, if a fault occurs on the bus itself and is not promptly cleared, it may cause permanent damage to the bus system. Moreover, if the bus is damaged, a large portion of the substation will experience … Read more
A Comprehensive Analysis of Nanocrystalline Core A critical component of a CT is its magnetic core, which significantly influences its performance, accuracy, and efficiency. Accuracy is the most essential property of a current transformer. Traditionally, Cold-Rolled Grain-Oriented (CRGO) silicon steel has been the material of choice for these cores. Nowadays, a superior alternative is available … Read more
This zero current crossing method is only applicable to alternating current circuit breaker. We all know that an alternating current naturally passes through zero at regular intervals (every half-cycle of the AC waveform). This method safely interrupts the alternating current at the natural zero-crossing of its waveform. Working Principle of a CB based on Zero … Read more
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Type Tests of a 33/0.415KV Station Service Transformer There are mainly three standards we follow for testing of a Station Service Transformer. These are IS : 1180 part 3 – 2021, CEA Guideline and CBIP Manual. Type Tests According to IS : 1180 part 3 – 2021 According to the latest version of IS 1180 … 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
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