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Q. What is centralized SPC?
In centralized control, all control equipment is replaced by a single processor which should be quite powerful. It should be capable of processing 10 to 100 calls per second, depending on the load on system and simultaneously performing many other ancillary tasks. A typical control configuration of an ESS employing centralized SPC is displayed in Figure. A centralized SPC configuration can use more than one processor for redundancy purposes. In almost all present day electronic switching systems using centralized control, only a two-processor configuration is used.
3-Phase 4 Wire Meters with CT and MD If load is commonly more than 50 A, CT operated meters should be used. It is to be remembered that CTs should be properly selected for acc
Ask qu1. If the resistor Radj is adjusted to 175O what is the rotational speed of the motor at no-load conditions? 2. Assuming no armature reaction, what is the speed of the motor
discuss the factor affecting the emf induced in electric machines
Voltage and Frequency Control Methods In this control method the ratio of voltage to frequency is kept constant so that the flux remains constant. The voltage at varia
Q. Counter-controlled analog to digital converter? Figure shows the block diagram of a counter-controlledA/Dconverter. Resetting the binary counter to zero produces D/A output
Prepaid Meters Prepaid metering is a system whereby consumers purchase electricity by a smart card. The amount paid together along with other information is encoded in the sma
Q. Demonstrate how finite state machine model helps in designing a switching system and give a typical illustration. Ans: Switching systemessentially belongs to class of fi
A capacitor is charged to 100 V and then discharged by a 50 kΩ resistor. If the time constant of the circuit is 0.8 s, verify: (a) The value of the capacitor, (b) The time
What is the use of terminal count register? Each of the four DMA channels of 8257 has single terminal count register. This 16-bit register is used for ascertaining that the dat
transfer function of Lube Oil Cooler Temperature
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