Description : What is the difference between relay and contactor?
Answer :
Relay have smaller ratings. Contactor is a high rating relay.
asked
May 2, 2018
by
anonymous
Answer :
A differential relay measures the vector difference between two or more similar electrical quantities.
asked
Mar 19, 2018
by
anonymous
Description : What is the difference between a cable and a conductor?
asked
Aug 12, 2019
by
anonymous
Description : What is the difference between a soft start and a VFD?
asked
Mar 15, 2018
by
anonymous
Description : What is the difference between an anode and a cathode?
Answer :
The anode is positively charged electrode and the cathode is negatively charged electrode.
asked
Mar 14, 2018
by
anonymous
Description : What is the difference between an insulator and a dielectric?
Answer :
Dielectric is the another name for insulator.
asked
Mar 11, 2018
by
anonymous
Description : What is the difference between a sensor and a transducer?
Answer :
https://electronics2electrical.com/19108/
asked
Mar 11, 2018
by
anonymous
Description : What is the difference between a microcontroller and a microprocessor?
Answer :
Compare microprocessor and microcontroller Microprocessor Microcontroller 1)Inbuilt RAM and ROM 1)Do not have inbuilt RAM or ROM 2)Inbuilt timer 2)Doesn't have inbuilt timer ... same memory 6)Many Multifunction pins on the IC 6)less multifunction Pins on IC.
asked
Mar 11, 2018
by
anonymous
Description : What is the difference between a mesh and a loop?
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between a line voltage and low voltage control system?
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between a blackout and brownout?
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between a counter and a timer?
Answer :
Counter counts only when the trigger is applied and timer counts continuously with some equal delay.
asked
Dec 19, 2017
by
anonymous
Description : What is the difference between a coil and an inductor?
Answer :
Inductor is covering with insulating material is called coil.so they differentiate between coil and inductor.
asked
Dec 16, 2017
by
anonymous
Description : What is the difference between BJT and FET?
Answer :
BJT is a current opperated transistor while FET is a field opperated transistor.
Description : What is the difference between an AC and DC generator?
Answer :
The generator which generates DC voltage is called DC generator and generator which generates AC voltage is called AC generator (or) Alternator. In DC generator armature is rotated and field winding ... generator. A DC generator can generate low voltages but an AC generator can generate upto 11kv.
asked
Mar 15, 2018
by
anonymous
Description : What is the difference between synchronous and asynchronous generator?
asked
Mar 15, 2018
by
anonymous
Description : What is the difference between synchronous and asynchronous motors?
Answer :
The motor which rotates at constant speed is called synchronous motor. And that constant speed is called as synchronous speed. And the motor which does not rotates at constant speed are called asynchronous motor. Asynchronous motor is also called as Induction motor.
asked
Mar 15, 2018
by
anonymous
Description : What is the difference between eddy current and hysteresis loss?
Answer :
Loss occurred by magnetising and demagnetising process is called histerisis loss and the current flowed due to the magnetic field produced by the electric field applied is called eddy current losses
asked
Mar 15, 2018
by
anonymous
Description : What is the difference between microcontroller and ARM processor?
asked
Mar 11, 2018
by
anonymous
Description : What is the difference between an ECU and an ECM?
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between DFT and FFT?
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between AC and DC drive?
Answer :
AC means alternating current It's Frequency is 50hz Dc means direct current ItsI Frequency is 0Hz
asked
Mar 10, 2018
by
anonymous
Description : What is difference between computer engineering and computer science?
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between analog and digital electronics?
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between line and phase current?
Answer :
The currents flows through phase lines is called line voltage and currents flows from phase to neutral line is called phase current
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between line and phase voltage?
Answer :
Line voltage is voltage between two phases R &Y (415 v) while phase voltage is the voltage between one phase and a neutral B & N (240 v).
asked
Mar 10, 2018
by
anonymous
Description : What is difference between KW and KVA?
Answer :
kW is kilowatt and kVA is kilovolt ampere. kW is unit of real power and kVA is unit of Apparent power.
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between linear and nonlinear electrical loads?
asked
Mar 10, 2018
by
anonymous
Description : What is the difference between beta and forced beta for BJT?
asked
Feb 20, 2018
by
anonymous
Description : What is difference between Star and Delta Connection?
Answer :
Star is 1. Open ckt 2. At center point present neutral Delta is 1. Closed ckt 2. Neutral not present in this case
asked
Dec 22, 2017
by
anonymous
Description : What is the difference between renewable and nonrenewable energy sources?
Answer :
Renewable energy sources are non-perishable, and Non-renewable energy sources are perishable sources. Non-Renewable energy sources are like coal, oil,nuclear fuel etc. Renewable energy sources are :- wind, solar, tidal, Geo thermal etc.
asked
Dec 18, 2017
by
anonymous
Description : What is the difference between forward and reverse bias?
Answer :
Forward bias is a PN junction bias which allows current to flow through the junction. Forward bias decreases the resistance of the depletion layer. Reverse bias is a PN junction bias that allows only ... Positive polarity on the n-type material and negative polarity to the p-type material.
asked
Dec 9, 2017
by
anonymous
Description : Describe the difference between an open circuit and a short circuit.
Answer :
Open circuit means the wire is cut meaning power will not flow and close circuit means wire is not cut and hence power will flow.Short circuit is the same as close circuit
asked
Jun 29, 2019
by
anonymous
Description : State the difference between energy conservation and energy audit.
Answer :
energy conservation Energy audit It is reducing the growth of energy consumption by avoiding unnecessary usage of energy It is an inspection, survey & analysis of energy flows ... Various measuring instruments, with proper sensing elements are required for the energy audit.
asked
May 3, 2020
by
anonymous
asked
Jan 21, 2020
by
Sampson
Description : Describe the difference between direct and alternating current.
Answer :
Direct current is the flow of electricity or charge in one direction.. Alternative current is the flow of charge that doesn't flow in one direction.
asked
Jun 29, 2019
by
anonymous
Answer :
In a single phase power factor meter the phase difference between the currents in the two pressure coils is exactly 90°.
asked
Mar 21, 2018
by
anonymous
Description : Write difference between absolute & secondary instrument.
Answer :
Absolute Instrument Secondary Instrument 1. These give magnitude of quantity in terms physical constants of instruments 1. These give reading directly of the quantity at the time of ... Raleigh current balance. 6. Examples - ammeter, voltmeter, amperehour meter, wattmeter etc.
asked
Sep 5, 2018
by
anonymous
Description : what is the difference between AC and DC current ?
Answer :
AC is generated using Alternator. DC is generated using DC generator. AC changes its direction periodically. DC do not change its direction periodically. AC have non zero frequency. DC have zero ... Power factor of AC is between 0 and 1. But power factor of DC is always 1.
Description : Distinguish between AC and DC.
Answer :
Particulars Direct Current Alternating Current Definition It is the current whose magnitude and direction do not change with respect to time. It is the current whose ... system, electroplating, Battery charging, Traction. AC machines, Domestic and industrial supply.
asked
Aug 8, 2018
by
anonymous
Description : What is the use of Buchholz relay in transformer?
Answer :
This is a transformer that is used to step up and down current.
asked
Dec 17, 2017
by
anonymous
Answer :
A thermal protection switch can protect against overload.
asked
Mar 19, 2018
by
anonymous
Description : Earthing switch is used for? (A) Measuring of safety voltage (B) Protection of equipment from ground faults (C) Discharging residual energies (D) All of the above
Answer :
Earthing switch is used for? (A) Measuring of safety voltage (B) Protection of equipment from ground faults (C) Discharging residual energies (D) All of the above
asked
May 8, 2018
by
anonymous
Description : Give the circuit analysis of current source inverter with resistive load. What are the main difference between voltage source inverter and current source inverter?
Answer :
Current source inverter (CSI): In current source inverter, the output current is independent of load. The input current of current source inverter is constant. Current source converter converts DC input current to ... are connected in parallel. In CSI diodes are connected in series.
asked
Feb 18, 2018
by
anonymous
Description : A relay has a rating of 5 A, 2.2 sec IDMT and a relay setting of 125% TMS = 0.6. It is connected to a supply circuit through a C.T. 400/5 ratio. The fault current is 4000 A. The operating current of the relay is
Answer :
A relay has a rating of 5 A, 2.2 sec IDMT and a relay setting of 125% TMS = 0.6. It is connected to a supply circuit through a C.T. 400/5 ratio. The fault current is 4000 A. The operating current of the relay is 6.25A
asked
May 3, 2018
by
anonymous
Description : The purpose of the restraining coil in a biased differential relay is (A) To reduce CT saturation during fault. (B) To increase the sensitivity of the relay. (C) To match the transformation ratio. (D) To limit the spill current through the relay during heavy external fault.
Answer :
d
asked
May 8, 2018
by
anonymous
Description : A relay used for protection of motors against overload is : (A) Impedance relay (B) Electromagnetic attraction type (C) Thermal relay (D) Buchholz's relay
Answer :
A relay used for protection of motors against overload is : Thermal relay
asked
May 8, 2018
by
anonymous
Description : A negative sequence relay is used for protection of (1) Generator (3) Motor (2) Transformer (4) Long Transmission lines
Answer :
A negative sequence relay is used for protection of Generator
asked
May 1, 2018
by
anonymous
Description : To prevent mal-operation of differentially connected relay while energizing a transformer, the relay restraining coil is based with (1) second harmonic current (2) third harmonic current (3) fifth harmonic current (4) seventh harmonic current
Answer :
To prevent mal-operation of differentially connected relay while energizing a transformer, the relay restraining coil is based with second harmonic current
asked
Apr 29, 2018
by
anonymous
Description : In the induction type directional over current relay, when a short-circuit occurs in the circuit (A) power flows in reverse direction (B) power flows in normal direction (C) directional power element does not operate (D) over current element is not energized
Answer :
In the induction type directional over current relay, when a short-circuit occurs in the circuit power flows in reverse direction
asked
Apr 28, 2018
by
anonymous