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Why transformer ratings are in kva?
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Why motor are rated as KW while transformer rated in kVA?
Answer : Motors are rated in **kW (kilowatts)**, while transformers are rated in **kVA (kilovolt-amperes)** because of the different ways they handle electrical power and the factors affecting their ... whereas a transformer's capacity is related to its ability to transfer both real and reactive power....

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Why transformer rating in kVA?
Answer : Transformers are rated in **kVA** (kilo-volt-amperes) because the rating reflects the **apparent power** (which combines both real power and reactive power) that the transformer can handle, rather than ... 's capability that works for all types of loads, whether their power factor is high or low....

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Why is a transformer called kVA?
Answer : A transformer is rated in kVA (kilovolt-amperes) because it represents the **apparent power** that the transformer can handle. Let's break it down: 1. **Apparent Power**: Power in an ... maximum total power (both real and reactive) that the transformer can handle, regardless of the power factor....

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What are the typical voltage ratings for MOSFETs in SMPS?
Answer : In Switched-Mode Power Supplies (SMPS), MOSFETs are commonly used as the switching devices due to their efficiency and fast switching characteristics. The voltage ratings of MOSFETs in SMPS ... provides a sufficient margin above the maximum voltage expected in the circuit for reliable operation....

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What are the common ratings of MCBs available in the market?

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What is a 1 kVA transformer?
Answer : A **1 kVA transformer** is a transformer that has a **rated power capacity of 1 kilovolt-ampere (kVA)**. Here's what that means: - **kVA (kilovolt-ampere)** is a unit of apparent power, ... ). Would you like more details on how a transformer works, or how to use this rating in practical scenarios?...

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What is the significance of voltage ratings in circuit design?
Answer : Voltage ratings are crucial in circuit design because they define the maximum voltage that components like resistors, capacitors, diodes, and transistors can safely handle without being damaged or malfunctioning. ... reliability of your circuits. It's a key step in designing any electronic system....

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Name any two lamps with their ratings used in horticulture.

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Why UPS rating in kVA?
Answer : The rating of a UPS (Uninterruptible Power Supply) is given in kVA (kilovolt-amperes) instead of kW (kilowatts) because it accounts for both the real power (kW) and the reactive power ( ... (real and reactive), ensuring it can support the full electrical load under varying power factor conditions....

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Why is apparent power in kVA?
Answer : Apparent power is measured in **kVA** (kilovolt-amperes) because it represents the total power in an electrical circuit, which includes both **real power** (in kW) and **reactive ... , including both useful and non-useful power, while avoiding the complexities introduced by the phase difference....

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Define the following ratings of a motor: (i) Horsepower rating (ii) Short-time rating

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What is the importance of IP ratings for LEDs?
Answer : IP ratings (Ingress Protection ratings) are important for LEDs because they tell you how well the light is protected from elements like dust, water, and other environmental factors. This ... industrial sites, selecting the appropriate IP rating will keep the LEDs functioning effectively and safely....

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What is the significance of UPS ratings and certifications?

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What is the significance of inverter lifetime ratings?

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How many units are in 1 kVA?
Answer : 1 kVA (kilovolt-ampere) is equal to 1,000 VA (volt-amperes). To convert kVA to units of energy (kilowatt-hours, or kWh), you'd need to know the power factor (pf) of the system. For a purely ... 0.8 kWh in 1 hour The exact number of units will depend on the load's power factor and usage time....

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There are a Transformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?

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Why hysteresis and eddy current losses occur in a transformer?

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Why is the transformer connected in delta Star?
Answer : A transformer is connected in a **delta-star (Δ-Y)** configuration for several practical reasons in electrical systems. Here's why it's commonly used: ### 1. **Step-down Voltage* ... single-phase connections. It offers benefits like voltage stability, load balancing, and better handling of faults....

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Why energy conservation technique should be adopted in transformer even though its efficiency is mostly more than 90%.

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Why is transformer used in rectifier?
Answer : A transformer is used in a rectifier circuit primarily for two reasons: ### 1. **Step-up or Step-down Voltage:** - **Voltage Transformation**: The transformer allows you to adjust the ... providing electrical isolation, both of which are crucial for the safe and effective conversion of AC to DC....

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Why transformer is not used in half wave rectifier?
Answer : A transformer is typically not used in a half-wave rectifier circuit for a few reasons: 1. **Inefficient Use of Transformer**: In a half-wave rectifier, only one half of the AC ... transformer. If you want to utilize a transformer effectively, a full-wave rectifier would be the better choice....

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Why PT is used in transformer?
Answer : PT (Potential Transformer) is used in transformers to measure high voltages and provide a scaled-down, safe version of the voltage for measurement and control purposes. Here's a simple ... help in safely measuring high voltages and ensuring proper control and protection of the power system....

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Is apparent power measured in or kVA?
Answer : Apparent power is measured in **volt-amperes (VA)**. When we refer to larger values, we use **kVA**, where **kVA** stands for **kilo-volt-amperes** (1 kVA = 1,000 VA). ... the total power in an AC circuit, representing the product of the voltage and current without considering the phase difference....

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What is 5 kVA in watts?
Answer : To convert from kVA (kilovolt-amperes) to watts, you need to know the power factor (pf), which typically ranges from 0 to 1. The formula is: \[ \text{Watts} = \text{kVA} \times 1000 \times \text{Power Factor} ... **5000 watts** for a power factor of 1, and **4000 watts** for a power factor of 0.8....

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What is the full form of kVA in DG?
Answer : The full form of **kVA** in DG (Diesel Generator) is **Kilovolt-Ampere**. It is a unit of apparent power, which represents the total power supplied by the generator. In the context of a DG set, the kVA rating indicates ... {Power Factor} \] So, \(100 \, \text{kVA} \times 0.8 = 80 \, \text{kW}\)....

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How many kVA in 20 amps?
Answer : To convert amps to kVA (kilovolt-amperes), you can use the formula: \[ kVA = \frac{{\text{{Voltage (V)} \times \text{{Current (A)}}}}}{{1000}} \] For example, if you are working with a 230V system (common in ... , \text{A}}}{1000} = 2.4 \, \text{kVA} \] So, it depends on the voltage you're using....

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