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Numerical and microprocessor relay comparison?
Numerical relays are all microprocessor based, but there are relays that take the advantage of microprocessor technology and are not fully numerical. In other words, if a relay is fully based on processing the samples of input signals it is numerical relay.
Applications of Microprocessors in Telecommunications and power system?
: hi.. : i have a little idea about this question.. : because of low power consumption and accurate measurements we can use static relays based on microprocessor in power system networks. also filtering of noise is possible with static relays(based on microprocessor). : also for continious monitoring and security we can use these microprocessors.
Difference between relay and solid state relay?
All solid state relays are relays, but not all relays are solid state relays. There are three basic kinds of (protective) relays I know of: electromechanical (rely on induced voltages and currents to spin disks or energize solenoids), solid state (built with solid state parts - basically prerequisites to microprocessors), and microprocessor based relays (fancy computers).
How do you find out under ground cable fault?
fault location can be provided by microprocessor based relays or targets (multiple INST overcurrents are sometimes used to determine rough location).
Microprocessor-based computer system?
comuter which uses microprocessors for control task that is the microprocessor based computer system........
What are numerical relays?
As we know numerical relays use DIGITAL SIGNAL PROCESSOR as its computational hardware and based on microprocessor. WORKING: Analog input is feed into the anti aliasing filter which is a low pass filter.Output of this filter is feed into the sample and hold circuit , frequency of sampling should be twice of our highest frequency of interest(according to the nyquist criterion).if sampling frequency kept low than aliasing input may occur. after the sampling, signal are feed into the multiplexer,where all the signal get multiplexed and we have a single signal.this signal is feed into the analog to digital converter.this digital signal is feed into the microprocessor and microprocessor generates control signal according to its input. for example if you are using N.R. for over-current protection than you should set a value of current in your program.if the value of current passes through the circuit is greater than the set value..than N.R. enables the circuit breaker and hence our system is protected..
What are protective relays?
A protective relay is a device designed to trip a circuit breaker when a fault is detected. The first protective relays were electromagnetic devices, relying on coils operating on moving parts to provide detection of abnormal operating conditions such as over-current, over-voltage, reverse power flow, over- and under- frequency. Microprocessor-based digital protection relays now emulate the original devices, as well as providing types of protection and supervision impractical with electromechanical relays. In many cases a single microprocessor relay provides functions that would take two or more electromechanical devices. By combining several functions in one case, numerical relays also save capital cost and maintenance cost over electromechanical relays. However, due to their very long life span, tens of thousands of these "silent sentinels" are still protecting transmission lines and electrical apparatus all over the world. An important transmission line or generator unit will have cubicles dedicated to protection, with many individual electromechanical devices, or one or two microprocessor relays.
Automation based on relays based on plc?
Could be both.
Vacuum tubes microprocessor based computers are?
first generation
Where is the microprocessor located at?
Im pretty sure it is located on the mother board But, there cna be objectives, they say the microprocessor is he CPU. So this is based on my knowledge.
What can you can do with iPads?
The same as you can do with any other microprocessor based computer. Run programs.
What has Bill Gate do before becoming famous?
Built microprocessor based machine
