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Off line UPS System
Again the two switches are used in this type of ups as online ups. The difference is that here the main static switch remains normally ON and UPS static switch remains normally OFF.
Here the load is directly connected to the main supply through main static switch. Under the condition of power failure, main static switch operates to disconnect the mains from the load and then ups static switch becomes ON to connect the load batter by bank through circuit. Battery bank suppliers the power to the load.
A feedback control system with the configuration of Figure has the following parameters: K p = 0.5 V/rad, K a = 100 V/V, K m = 2.7 × 10 -4 N·m/V, J = 1.5 × 10 -5 kg·m 2 , and
a shunt motor supplied at 230V rms runs at 900rev/min when the armature current is 30A.the resistance of the armature circuit is 0.4 ohms.find the armature input
1. Introduction : Theory: Frequency is the number of occurrences of a repeating event per unit time. It can also be defined as the number of repetitions (cycles) of a w
how can i do a question concerning a transfer function
which simulation software is better for this project, and how can i simulate it?
What are the precautions to be taken before basic work on electrical installations? Ans: Before starting any electrical works on installations disconnect the power supply to
The dielectric constant of air is practically taken as (A) more than unity. (B) Unity. (C) less than unity. (D) Zero.
different types of probes used in multimeter
Consider the characteristics of patterns that appear on the screen of a CRT, when sinusoidal voltages are simultaneously applied to horizontal and vertical plates. These patterns a
Test Schedule - Meter Testing The test schedule as per the Central Electricity Authority Regulations on Installation and Operation of Meters is given below. Table: Test S
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