General Topic

Transformer cooling system

1.method of Cooling transformer cooling system is Increasing the cooling rate of a transformer will increase its capability. Cooling ways should not solely maintain a sufficiently low average temperature however should stop associate degree excessive temperature rise in any portion of the transformer. For this reason operating elements of enormous transformer are typically submerged in best …

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MAINTENANCE

General It is essentially important to carry out electrical maintenance on a regular basis; maintaining all the electrical material fittings, appliances, and devices in and around your home. Maintenance enhances the smooth running of all the electricity-powered items in your home while creating a safe environment that will be free from all sorts of hazards. Today, we …

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Instrument Transformers

1.What is an Instrument Transformer? • It could be a electrical device that’s utilized in conjunction with any measuring device (i.e.,   Ammeter,Voltmeter, Wattmeter, Watt-hour-meter …etc.) or protecting instrumentality (i.e., Relays). • It utilizes the current-transformation and voltage transformation properties to live high ac current and voltage. 2.Types of instrument transformers: This instrument transformers area unit of 2 types:- 1. Current transformers 2. Potential transformers 3.Applications of Instrument Transformers: •  For measuring …

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BATTERIES

1. General A battery is an electrochemical cell that is used to store chemical energy for conversion of latter to electric energy. Of the many different types of batteries available, this chapter describes only their principal characteristics and installation. The two basic types of cells are primary and secondary. A primary cell is chemically irreversible. …

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Relay

Relay the switches that aim at closing and gap the circuits electrically likewise as electromechanically. Its controls the gap and shutting of the circuit contacts of associate degree electronics circuit. Once the relay contact is open (NO), the relay isn’t energizing with the open contact. However, if it’s closed (NC), the relay isn’t energizing given the closed contact. …

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1.Electric cars in India

Electric cars in India – Electric cars are making big waves within the automobile, world these noise free pollution fries and high-performance vehicles are expected to form their IC engine counter parts obsolete by 2025. This text will unveil the hidden technologies behind the Tesla Model S. This recently became the world’s fastest accelerating car. We will see how electric cars …

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1.What is grounding

OBJECTIVE: After going through this chapter the trainee will be able to tell about 1) The necessity & awareness of safety in handling electrical equipment 2) Station grounding 3) Do’s & Don’ts on electrical equipment, 4) Comprehend and put to use the basic safe practices that are to be followed in day-to-day work.  1.0 INTRODUCTION: …

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NPCIL 2019 Exam paper SA/ST CAT-I (Electrical)

Question No. 1 The maximum temperature permitted in Class A insulation is A) 180° C             B) 155° C C) 120° C             D) 105° C  Answer Key: D Question No. 2 MHCP in illumination stands for A) Median Horizontal Candle Power                B) Mode Horizontal Candle Power C) Mean Horizontal Candle Power                   D) …

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