238 views

1 Answer

Answer :

A thermal protection switch can protect against overload.

Like 0 like

Please log in or register to answer this question.

Related questions

30 views

Description : 3 phase 11KV to 4 10000 KVA alternator has neutral Earth through a resistance of 1 ohm the machine has current balance protection while operate upon of balance Karan exceed 18% of full load determine percentage of winding and protected against ground fault

0 answers
268 views

Last Answer : Thermal overload relays are used to protect the motor against overcurrent due to heavy loads.

1 answer
3.1k views

Description : IDMT relays are used to protect the transformer against :  (A) Internal short -circuits (B) Open circuits (C) External short circuits (D) Oil leakage

Last Answer : IDMT relays are used to protect the transformer against : External short circuits

1 answer
566 views

Description : To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ?

Last Answer : To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ? Δ-Δ connection

1 answer
106 views

Description : A circuit breaker is designed to protect an electrical circuit from damage caused by :  (A) Over load (B) Short circuit (C) Over current (D) All of the above

Last Answer : A circuit breaker is designed to protect an electrical circuit from damage caused by :  (A) Over load (B) Short circuit (C) Over current (D) All of the above

1 answer
554 views

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

Last Answer : D

2 answers
4.6k views

Description : For protection of rotating machines against lightning surges _______ is used.  (1) lightning arrester (2) capacitor (3) combination of lightning arrester and capacitor (4) lightning conductor and arrester

Last Answer : For protection of rotating machines against lightning surges combination of lightning arrester and capacitor is used. 

1 answer
123 views

Description : Reactance relay is normally preferred for protection against

Last Answer : Reactance relay is normally preferred for protection against earth faults

1 answer
3.0k views

Description : Surge absorbers are used for protection against

Last Answer : Surge absorbers are used for protection against low voltage high frequency oscillations

1 answer
165 views

Last Answer : A fuse in a motor circuit provides protection against short-circuit and overload.

1 answer
2.6k views

Last Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.

1 answer
98 views

Last Answer : For the protection of power station buildings against direct strokes the requirements are interception, conduction and dissipation.

1 answer
156 views

Last Answer : Thermal circuit breaker has delayed trip action.

1 answer
115 views

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 

Last 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 

1 answer
114 views

Description : What is the difference between a switch and a relay?

Last Answer : Switch is simply a mechanical contact mechanism and relay is a electromagnetic switch . Switch can be direct mechanically turn on and off but relay can be operated by energising coil .

1 answer
672 views

Description : Blind spot is a point in the zones of protection where

Last Answer : Blind spot is a point in the zones of protection where No protection is available.

1 answer
630 views

Description : A negative sequence relay is used for protection of  (1) Generator (3) Motor (2) Transformer (4) Long Transmission lines

Last Answer : A negative sequence relay is used for protection of Generator 

1 answer
175 views

Last Answer : Protection by fuses is generally not used beyond 100 A .

1 answer
83 views

Last Answer : Overfluxing protection is recommended for generator transformer of the power plant.

1 answer
101 views

Last Answer : Over voltage protection is recommended for hydro-electric generators, steam turbine generators, gas turbine generators.

1 answer
313 views

Last Answer : The single phasing relays are used for the protection of three phase motors.

1 answer
400 views

Last Answer : Discrimination between main and back up protection is provided by the use of relays which are slow.

1 answer
104 views

Last Answer : The delay fuses are used for the protection of motors.

1 answer
411 views

Description : Primary and Backup Protection

Last Answer : Primary and Backup Protection  B,D,G,I are the primary protection. A,C,H,J are the backup protection. About 90% of faults are clear by Primary Protection. So ... ordinated backup (primary is at various station  and backup is at control room with computer)

1 answer
8 views

Description : How to Protect Yourself from Swine Flu

Last Answer : How to Protect Yourself from Swine Flu Swine flu, which is also called H1N1 is a respiratory infection caused by a strain of influenza virus. This disease affected millions of people ... to prevent the transmission of microorganisms would also help in preventing you from acquiring this illness.

1 answer
9 views

Description : How to Protect Outdoor Furniture

Last Answer : How to Protect Outdoor Furniture Outdoor furniture are made sturdy, so they can last under the harsh conditions presented by your home's outdoor environment. However, without additional protection, the ... in fact, they will make your property look tacky. So better do the necessary cleaning.

1 answer
5 views

Description : How to Protect Leather

Last Answer : How to Protect Leather Genuine leather is a beautiful material that can last years when taken care of properly. Here's how to protect your investment and enjoy your leather for years to come. ... days before using the leather item once again. Keep your leather protected from humidity and dampness.

1 answer
6 views

Description : How to Password Protect a File ?

Last Answer : How to Password Protect a File We all have secure computer files we want to protect from unwanted and unauthorized access. One of the lines of defense for securing files is a safe and secure ... , you can protect your files from unauthorized access and maintain a very safe, secure computer system.

1 answer
4 views

Description : How to Protect Your Passwords ?

Last Answer : How to Protect Your Passwords Passwords are the first line of security for many end-users. Whether it's for e-mail, an online shopping service, or a social networking site, ... confidently access your personal accounts without having to worry about other people stealing your personal information.

1 answer
139 views

Description : An inductor is connected in series with SCR to protect it from A) Excessive high voltage B) Excessive high dv/dt C) Excessive high di/dt D) Excessive large forward current 

Last Answer : An inductor is connected in series with SCR to protect it from Excessive high di/dt

1 answer
231 views

Description : Explain the thermal triggering method of SCR. Enlist different triggering methods of SCR.

Last Answer : Types of Triggering: 1) Forward voltage triggering 2) Thermal triggering (Temperature triggering) 3) Radiation triggering (Light triggering) 4) dv/dt triggering 5) Gate triggering ... generated leakage current increases. This current gets multiplied internally and thyristor is turned on. 

1 answer
74 views

Description : Define thermal runaway.

Last Answer : Thermal runaway  The problem with increasing temperature causing increasing collector current is that more current increase the power dissipated by the transistor which, in turn, increases its temperature ... self-reinforcing cycle is known as thermal runaway, which may destroy the transistor. 

1 answer
153 views

Description : Classify condensers used in thermal power station. Explain each type in brief. 

Last Answer : Types of condenser: Classification: 1. Jet Condenser (Mixing Type) 2. Surface condenser (non Mixing type)  Explanation:-   1. Jet Condenser (Mixing Type) In Jet condenser the steam ... there in no direct contact between the steam and cooling water. This condensate is reused in boiler. 

1 answer
113 views

Description : "Efficiency of thermal power station is low". — Justify. 

Last Answer : Justification: Efficiency of thermal power station is low":- Overall efficiency of T.P.P depends upon efficiency of boiler, turbine and alternator. The heat produced due to combustion of coal ... losses in thermal power plant is 71%, So efficiency of thermal power plant is less about 29% 

1 answer
102 views

Description : State advantages of Pulverized coal w.r.t. thermal power plant. 

Last Answer : Advantages of Pulverized coal w.r.t. thermal power plant.  1. Due to pulvarization amount of fuel required to produce same amount of heat reduces. 2. Time required for combution reduces ... of air and thorough mixing of air and fuel, very high-combustion temperatures can be attained.

1 answer
90 views

Description : State the function of super heater of a thermal power plant. 

Last Answer : Function of Super heater: -  Its function is to increase the temperature of steam by absorbing heat from exhausted hot flue gases.

1 answer
563 views

Description : Describe thermal runaway of transistor and explain how it can be avoided.

Last Answer : Concept of thermal runaway:  1.We know that  IC = β IB + (1+ β) ICO  Where ICO is the leakage current and ICO is strongly dependent on temperature. 2. Leakage current approximately doubles for ...   Thermal runaway can be avoided by : 1) Using stabilization circuitry 2) Heat sink 

2 answers
323 views

Description : State the function of cooling tower and condenser in thermal power station.

Last Answer : 1. Condenser:   Function of condenser is to convert exhaust steam again into water by reducing its temperature with the help of cold water. Also it reduces back pressure of steam turbine 2 ... tower : The function of cooling tower is to reduce the temperature of water coming from condenser.

1 answer
172 views

Description : Write any four advantages and four disadvantages of thermal power plant.

Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

3 answers
93 views

Description : Explain ash disposal and dust collection in a thermal power plant.

Last Answer : Ash disposal:-  Various methods of disposal of ash are:  Mechanical handling system.  Pneumatic system. Hydraulic system  Steam jet system  Commonly used ash handling ... be done either manually or automatically.  This removed fly ash is collected in separate container

1 answer
201 views

Description : State any four factors governing Selection of site for thermal power station. 

Last Answer : Following Factors are to be considered:- 1. It should locate near coal mine. 2. Sufficient quantity of water should be available. 3. Sufficient large space should be available. 4. It should be located ... laws of the land and the town planning. 14. The interests of national defense must be served.

2 answers
474 views

Description : The overall efficiency of Thermal Power Plant is equal to _______________ .  (A) Regenerative Cycle Efficiency (B) Renkine Cycle Efficiency (C) Carnot cycle efficiency (D) None of the above

Last Answer : The overall efficiency of Thermal Power Plant is equal to Regenerative Cycle Efficiency. 

1 answer
115 views

Description : In a thermal power plant, ash is collected in

Last Answer : In a thermal power plant, ash is collected in hoppers or bunkers

1 answer
91 views

Description : The unit heat rate characteristic of a thermal power unit shows :  (A) Heat input per kWh of output versus the megawatt output of unit  (B) Heat input per kW of output versus the megawatt output ... hour output of unit  (D) Heat input per kW of output versus the megawatt hour output of unit

Last Answer : The unit heat rate characteristic of a thermal power unit shows : Heat input per kWh of output versus the megawatt output of unit 

1 answer
80 views

Description : What is thermal runaway of a transistor?

0 answers
3 views

Description : Should I switch to a credit union?

Last Answer : I switched from a bank to a credit union a long time ago. Competitive interest rates, fewer fees, easier loan approvals, better customer service.

1 answer
15 views

Description : How to Replace a Light Switch

Last Answer : How to Replace a Light Switch They say it only takes one idiot to change a light bulb, but to change a light switch requires the skill and carefulness of a handyman. If you have a malfunctioning or a ... doesn't have to be a hassle. Just remember these steps and switching a new switch will be easy.

1 answer
10 views

Description : How to Install a Timer Switch

Last Answer : How to Install a Timer Switch A timer switch is a handy device that automatically turns off a switch after a fixed period of time. This is particularly useful when you have kids at home ... safety precautions when installing switches or anything that might put you in the direct path of electricity.

1 answer
11 views

Description : How To Install A Dimmer Switch

Last Answer : How To Install A Dimmer Switch Having a room with a bright light is good, but there are instances when you need the lights to be lower than what you're accustomed. You need to have a dimmer switch, ... your home. Follow them properly, and you'll be able to fiddle with the light levels in your home.

1 answer
16 views

Description : How to Wire a Three-Way Switch ?

Last Answer : How to Wire a Three-Way Switch A three-way switch is the most common system installed in residential areas. This system is used to control a light and receptacle or more from two different switches ... wires for interior use. #14 wires are suggested to be used for protected circuits at 15 amperes.

1 answer
...