A fuse wire should have : (A) Low specific resistance and high melting point (B) Low specific resistance and low melting point (C) High specific resistance and high melting point (D) High specific resistance and low melting point
Last Answer : A fuse wire should have : High specific resistance and low melting point
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1 answer
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May 8, 2018
by
anonymous
ln HRC fuse the time between cut-off and final current zero is called
Last Answer : ln HRC fuse the time between cut-off and final current zero is called the arcing time
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140 views
1 answer
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Apr 26, 2018
by
anonymous
Last Answer : A fuse in a motor circuit provides protection against short-circuit and overload.
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157 views
1 answer
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Mar 20, 2018
by
anonymous
Last Answer : The fuse blows off by melting.
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72 views
1 answer
asked
Mar 20, 2018
by
anonymous
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Last Answer : The fuse rating is expressed in terms of current.
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151 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : H.R.C. fuse, as compared to a rewirable fuse, has no ageing effect, high speed of operation, high rupturing capacity.
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118 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : The material used for fuse must have low melting point and high specific resistance.
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163 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : The main function of a fuse is to prevent excessive currents.
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93 views
1 answer
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Mar 19, 2018
by
anonymous
What is fuse?
Last Answer : Ans. Fuse is used to protect an electric circuit when the rated current exceeds in the circuit the fuse wire melts and opens the circuit.
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1 answer
State any two advantages of MCB over Fuse. State the standard specifications of MCB available in the market.
Last Answer : Following advantages of MCB over Fuse: 1. No need of replacement of fuse wire. 2. Manually restore of supply is simple. 3. Fault understanding by visual inspection 4. More safe than fuse The standard specifications of ... 6A, 10A,16A,20A, 25A, 30A, 32A, 40A, 50A, 60A and 63A 6. 250V and 450 v
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194 views
1 answer
asked
May 7, 2020
by
anonymous
State the material used for making (1) Magnetic Core (2) Fuse element
Last Answer : The material used for making of: (1) Magnetic Core : Iron, cobalt, Nickel, CRGO, HRGO , silicon steel (2) Fuse Element: Tin- lead wire, Tinned copper wire
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210 views
1 answer
asked
May 7, 2020
by
anonymous
Write applications of each of the following:(i) Fuse (ii) MCB (iii) MCCB.
Last Answer : i) Applications of fuse: * Used in domestic installations to provide short circuit protection. * Used in commercial / Industrial installations to provide overload and short circuit protection. * Used in ... * Rectifiers panels, * U.P.S, Electronic equipment, * Motors, * Furnaces
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156 views
1 answer
asked
Apr 27, 2020
by
anonymous
Give the function of fuse and switch.
Last Answer : Functions of fuse: * To break the circuit under fault condition. * To provide overcurrent protection to the circuit. * To provide short circuit protection to the circuit. * To provide ... * To make the electric circuit manually. * To break the electric circuit manually.
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121 views
1 answer
asked
Apr 27, 2020
by
anonymous
What is a fuse ?
Last Answer : A Fuse is a protective device which prevent overloading of current in a circuit.
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125 views
3 answers
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Aug 24, 2019
by
anonymous
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what is HRC fuse?
Last Answer : HRC (High Rupturing Capacity) fuse HRC fuse is High Rupturing Capacity fuse. At the time of fault it disconnect the circuit very fast. Filling powder is silica sand. No flashover ... speed response Reliable No maintenance CheaperDisadvantages:- We have to replace it manually after each operation.
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154 views
1 answer
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Aug 8, 2017
by
anonymous
Last Answer : 1. Connected Load: It is the sum of load of all equipment's connected to supply system which are in use or not in use of each consumer. OR The sum of connected load of all consumers ... is the maximum load which a consumer uses at a particular time period out of his total connected load.
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165 views
1 answer
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Jul 24, 2019
by
anonymous
Define the terms: i) Tariff ii) Fuel surcharge iii) Electricity Duty iv) Connected load
Last Answer : i) Tariff: The rate at which a consumer is charged for the consumption of electricity is called as tariff. OR The amount of money framed by the supplier for the supply of electrical energy ... is the total wattage of all appliances which are used by the consumer on his sanctioned connection.
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141 views
1 answer
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Sep 29, 2018
by
anonymous
Define the following terms related to tariff: (i) Connected load (ii) Unit consumed (iii) Fixed charges (iv) Electricity Tax
Last Answer : (i) Connected load It is the sum of the power ratings (Watts or kW or MW) of all devices and machines existing (installed) in the premises of consumer. It is used to decide the ... a percentage of the total electricity bill which includes all amounts that go to the electricity supply agency.
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433 views
1 answer
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Sep 22, 2018
by
anonymous
Define each of following terms: i) Connected load ii) Spinning reserve.
Last Answer : i) Connected Load :- It is the sum of load of all equipment connected to supply system which are in use or not in use of each consumer. ii) Spinning Reserve:- It is reserved generating capacity in operation and connected to bus bar and ready to take a load.
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76 views
1 answer
asked
Sep 7, 2018
by
anonymous
A balanced Delta connected load supplied with 440 V 50 Hz three phase AC supply has R=10 Ohm and L=0.6 mH in is each arm. Calculate line and phase current, active power.
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253 views
0 answers
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Aug 12, 2018
by
anonymous
Draw the phasor diagram for Star connected balanced system.
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0 answers
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Aug 11, 2018
by
anonymous
Draw the Delta connected three phase system showing all the voltages and currents. Write the power equation.
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0 answers
asked
Aug 11, 2018
by
anonymous
A connected graph has ‘5’ number of branches and ‘4’ number of nodes. It's rank is A) 1 B) 2 C) 3 D) 4
Last Answer : A connected graph has ‘5’ number of branches and ‘4’ number of nodes. It's rank is 3
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206 views
1 answer
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Jun 18, 2018
by
anonymous
In an R-C phase shift oscillator, the minimum no. of R-C networks to be connected in cascade will be -
Last Answer : In an R-C phase shift oscillator, the minimum no. of R-C networks to be connected in cascade will be 3
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170 views
1 answer
asked
May 8, 2018
by
anonymous
Two 100W, 200V lamps are connected in series across a 200V supply. The total power consumed by each lamp will be in Watts
Last Answer : 4800
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449 views
2 answers
asked
May 8, 2018
by
anonymous
Three identical resistors connected in star consume 5000 W. If the resistors are connected in delta across the same supply, the power consumed will be
Last Answer : Three identical resistors connected in star consume 5000 W. If the resistors are connected in delta across the same supply, the power consumed will be 15000 W
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185 views
1 answer
asked
May 8, 2018
by
anonymous
A four -quadrant operation requires two full converters connected in (1) Series (3) Back to back (2) Parallel (4) Series Cascade
Last Answer : A four-quadrant operation requires two full converters connected in Parallel
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883 views
1 answer
asked
Apr 30, 2018
by
anonymous
Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these
Last Answer : Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these
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211 views
1 answer
asked
Apr 29, 2018
by
anonymous
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When three resistors with unequal values are connected in parallel, _______ A) The current across the resistors is the same B) The voltage drop across the resistors is the same C) The voltage drops across the resistors is proportional to the resistance of each resistor D) None of these
Last Answer : When three resistors with unequal values are connected in parallel, The voltage drop across the resistors is the same
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119 views
1 answer
asked
Apr 29, 2018
by
anonymous
What is the total resistance if 5 resistors of 20 Ω each are connected in series? A) 100 Ω B) 4 Ω C) 20 Ω D) None of these
Last Answer : What is the total resistance if 5 resistors of 20 Ω each are connected in series? A) 100 Ω B) 4 Ω C) 20 Ω D) None of these
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136 views
1 answer
asked
Apr 29, 2018
by
anonymous
The sequence components of current of a single-phase load connected to a 3-phase system are (A) equal positive and negative sequence components (B) equal positive, negative and zero sequence components (C) vector sum of sequence currents is zero (D) algebraic sum of sequence currents is zero
Last Answer : The sequence components of current of a single-phase load connected to a 3-phase system are equal positive, negative and zero sequence components
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480 views
1 answer
asked
Apr 28, 2018
by
anonymous
If non-linear loads are connected to the power system, then (A) displacement power factor is same as the total power factor (B) displacement power factor is not equal to the total power ... factor is due to harmonic currents (D) total power factor is due to fundamental component of current
Last Answer : If non-linear loads are connected to the power system, then displacement power factor is not equal to the total power factor
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113 views
1 answer
asked
Apr 28, 2018
by
anonymous
With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals?
Last Answer : Power is the only thing which is additive in both connection whether it is parallel or series connection so total power consumed will addition of all individual power =20+20+20 = 60 watt
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1.1k views
2 answers
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Mar 25, 2018
by
anonymous
Last Answer : If a D.C. motor is connected across the A.C. supply it will burn due to heat produced in the field winding by eddy currents.
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102 views
1 answer
asked
Mar 20, 2018
by
anonymous
Cells are connected in series in order to?
Last Answer : Cells are connected in series in order to increase voltage available.
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110 views
1 answer
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Mar 16, 2018
by
anonymous
Explain Three Phase Bidirectional Delta Connected Controller.
Last Answer : Three Phase Bidirectional Delta Connected Controller:
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483 views
1 answer
asked
Mar 7, 2018
by
anonymous
What is line voltage and phase voltage? Draw balanced three phase star connected system. Show all the voltages and currents.
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125 views
0 answers
asked
Aug 11, 2018
by
anonymous
Describe the working of HRC fuse with neat diagram.
Last Answer : Working of HRC Fuse: Under normal conditions, the fuse element is at a temperature below its melting point. Therefore, it carries the normal current without overheating. When a fault ... powder and results in the formation of high resistance substance that helps in quenching the arc.
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107 views
1 answer
asked
Jun 23, 2020
by
anonymous
Explain construction and characteristics of HRC fuse.
Last Answer : Construction of H.R.C. Fuse: Figure shows the essential parts of a typical H.R.C. fuse. It mainly consist of a heat resisting ceramic body. Both the ends of the cermaic body consists ... particular circuit and for coordination purpose. A typical Fuse characteristic is shown in figure below.
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170 views
1 answer
asked
Jul 21, 2019
by
anonymous
Describe the difference between fuse and MCCB.
Last Answer : Sr. No Fuse MCCB 1 Fuse melts / fuses in case of excessive load. MCCB trips off in case of excessive load. 2 Fuse needs to be replaced after every ... Generally protects the load against short-circuit. Generally protects the load against different types of faults.
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2.6k views
1 answer
asked
Jul 21, 2019
by
anonymous
An IDMT relay of rating 5A, 2.2s and having a relay setting of 125% is connected to a supply circuit through a CT having a ratio of 400/5. The plug setting multiplier of IDMT relay in the event of fault current of 4000 A will be a. 5 b. 8 c. 10 d. 125
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168 views
0 answers
asked
May 24, 2018
by
anonymous
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
Last 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
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728 views
1 answer
asked
May 3, 2018
by
anonymous
A lightening arrester connected between the line and earth in a power system (1) protects the terminal equipment against travelling surges (2) protects the transmission line against direct ... suppresses high frequency oscillations in the line (4) reflects back the travelling wave approaching it
Last Answer : A lightening arrester connected between the line and earth in a power system protects the terminal equipment against travelling surges
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365 views
1 answer
asked
Apr 29, 2018
by
anonymous
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
Last Answer : To prevent mal-operation of differentially connected relay while energizing a transformer, the relay restraining coil is based with second harmonic current
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496 views
1 answer
asked
Apr 29, 2018
by
anonymous
Which covalent fuse wire is connected to the main circuit ?
Last Answer : The fuse wire is connected to the main circuit in a class co-op.
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0 views
1 answer
asked
Jan 28
by
anonymous
Which wire is the fuse connected to ?
Last Answer : The fuse is connected to the live wire.
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2 views
1 answer
asked
Jan 27
by
anonymous
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To which wire is the fuse connected ?
Last Answer : The fuse is connected to the live wire
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1 view
1 answer
asked
Jan 27
by
anonymous
Is a differential pressure transmitter a fuse that is connected power supply?
Last Answer : A differential pressure transmitter accurately measures your liquid levels, differential pressure and gauge pressure. The transmitter utilizes a unique silicone sensor with microprocessor technology to provide great performance and functionality.
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0 views
1 answer
The fuse in an electric circuit is connected in
Last Answer : series with the live wire
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1 answer
In an electrical circuit, a fuse is connected (a) in the live wire (b) in the neutral wire (c) in the earth wire (d) anywhere—it makes no difference
Last Answer : Ans:(a)
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1 answer
