What are the three types of circuit breaker trip elements?

What are the three types of circuit breaker trip elements?
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1 Answer

Answer :

Thermal, magnetic, and thermal-magnetic
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Related questions

Where should you use a trip-free circuit breaker?

Description : Where should you use a trip-free circuit breaker?

Last Answer : In current sensitive or nonemergency systems.

What is a trip-free circuit breaker?

Description : What is a trip-free circuit breaker?

Last Answer : A circuit breaker that will trip even if the operating mechanism is held ON.

Why will too many electrical devices operating at one time after blow a fuse or trip a circuit breaker?

Description : Why will too many electrical devices operating at one time after blow a fuse or trip a circuit breaker?

Last Answer : The load exceeds the limit of the breaker or fuse. For example a20 amp breaker on a 120 volt circuit will handle 2400 watts. Exceedthat wattage and the breaker will trip or the fuse will blow.

My current microwave oven causes my circuit breaker to trip if I use it at the same time as my toaster oven. Will this microwave solve that problem?

Description : My current microwave oven causes my circuit breaker to trip if I use it at the same time as my toaster oven. Will this microwave solve that problem?

Last Answer : It's doubtful; I wouldn't be able to answer that for sure unless I knew the particulars of your set-up (what is your microwave/toaster's draw? what kind of breaker do you have? etc.), but I don't see any reason why this microwave would help that situation.

A circuit breaker for a 300 KW alternator is rated at 470 amperes of full continuous load. The amount of overcurrent allowed is 125%. Which of the following conditions will trip the breaker? A. Sustained current flow of 470 amperes. B. Sustained current flow of 500 amperes for 10 minutes. C. Momentary starting load of 550 amperes. D. Sustained current flow of 590 amperes.

Description : A circuit breaker for a 300 KW alternator is rated at 470 amperes of full continuous load. The amount of overcurrent allowed is 125%. Which of the following conditions will trip the breaker? A. ... 10 minutes. C. Momentary starting load of 550 amperes. D. Sustained current flow of 590 amperes.

Last Answer : Answer: D

If a circuit breaker that utilizes built-in, current limiting fuses (CLF's) cannot be closed, the problem may be traced to __________. A. a blown CLF plunger holding the trip bar in the open position B. a missing CLF C. a misaligned limiter housing assembly D. all of the above

Description : If a circuit breaker that utilizes built-in, current limiting fuses (CLF's) cannot be closed, the problem may be traced to __________. A. a blown CLF plunger holding the trip bar in the open position B. a missing CLF C. a misaligned limiter housing assembly D. all of the above

Last Answer : Answer: D

How will a molded-case circuit breaker react after it has tripped, as a result of an overloaded circuit? A. The breaker will trip again if immediately reset. B. The breaker handle will lock in the OFF position. C. The breaker handle will lock in the tripped position until the thermal element cools down. D. The breaker handle cannot be moved to the OFF position until the thermal element cools down.

Description : How will a molded-case circuit breaker react after it has tripped, as a result of an overloaded circuit? A. The breaker will trip again if immediately reset. B. The breaker handle will lock in ... down. D. The breaker handle cannot be moved to the OFF position until the thermal element cools down.

Last Answer : Answer: A

Undervoltage trips are frequently installed on switchboard circuit breakers to trip ____________. A. out generators in the event of severe arcing or sparking B. out generators when there is reversal of power in the main circuit C. the breaker if the generator overspeeds by 5%, but continues to run D. out generators when there is low voltage in the main circuit

Description : Undervoltage trips are frequently installed on switchboard circuit breakers to trip ____________. A. out generators in the event of severe arcing or sparking B. out generators when there is reversal of power ... , but continues to run D. out generators when there is low voltage in the main circuit

Last Answer : Answer: D

You are attempting to parallel two AC generators and the synchroscope pointer stops at a position other than 0°. If you close the circuit breaker at this moment _____________. A. the incoming machine will accept all of the load B. the incoming machine will trip out on low voltage release C. a hazardous condition will be created by the cross current between the machines D. a hazardous condition will be created by the incoming machine being at a higher frequency than the bus

Description : You are attempting to parallel two AC generators and the synchroscope pointer stops at a position other than 0°. If you close the circuit breaker at this moment _____________. A. the incoming ... hazardous condition will be created by the incoming machine being at a higher frequency than the bus

Last Answer : Answer: C

The arc resulting from the tripping of a circuit breaker is prevented from damaging the contacts by _____________. A. designing the contacts to open slowly B. directing the arc into an arc chute C. an inverse timed thermal trip for short circuit currents D. instantaneous magnetic trip for overload currents

Description : The arc resulting from the tripping of a circuit breaker is prevented from damaging the contacts by _____________. A. designing the contacts to open slowly B. directing the arc into an ... an inverse timed thermal trip for short circuit currents D. instantaneous magnetic trip for overload currents

Last Answer : Answer: B

The purpose of a main switchboard circuit breaker's reverse-power trip is to _____________. A. prevent main circuit overload B. protect the circuit breaker blowout coil C. prevent alternator motorization D. prevent low voltage tripout

Description : The purpose of a main switchboard circuit breaker's reverse-power trip is to _____________. A. prevent main circuit overload B. protect the circuit breaker blowout coil C. prevent alternator motorization D. prevent low voltage tripout

Last Answer : Answer: C

Fuses placed in series with a thermal trip-type circuit breaker are used for _____________. A. time-delay protection B. short-circuit protection C. short duration surge protection D. sustained overload protection

Description : Fuses placed in series with a thermal trip-type circuit breaker are used for _____________. A. time-delay protection B. short-circuit protection C. short duration surge protection D. sustained overload protection

Last Answer : Answer: B

Magnetic circuit breaker has ______ trip action. (a) delayed (b) instantaneous (c) both of the above (d) none of the above

Description : Magnetic circuit breaker has ______ trip action. (a) delayed (b) instantaneous (c) both of the above (d) none of the above

Last Answer : (b) instantaneous

Thermal circuit breaker has (a) delayed trip action (b) instantaneous trip action (c) both of the above (d) none of the above

Description : Thermal circuit breaker has (a) delayed trip action (b) instantaneous trip action (c) both of the above (d) none of the above

Last Answer : (a) delayed trip action

With which of the following, a circuit breaker must be equipped for remote operation ? (a) Inverse time trip (b) Time-delay trip (c) Shunt trip (d) None of the above (e) All of the above

Description : With which of the following, a circuit breaker must be equipped for remote operation ? (a) Inverse time trip (b) Time-delay trip (c) Shunt trip (d) None of the above (e) All of the above

Last Answer : (c) Shunt trip

Magnetic circuit breaker has ______ trip action.

Last Answer : Magnetic circuit breaker has instantaneous trip action.

What items are you to check when working on a circuit breaker?

Description : What items are you to check when working on a circuit breaker?

Last Answer : Check the operating mechanism for smooth operation, check the contacts for pitting, check the terminals for tightness and corrosion, check the mounting hardware for tightness and wear, check all components for wear, and check the entire circuit breaker for cleanliness.

What steps are to be taken before beginning work on a circuit breaker

Description : What steps are to be taken before beginning work on a circuit breaker

Last Answer : Check the applicable technical manual, obtain the approval of the electrical or engineering officer (for shipboard circuit breakers), remove power from the circuit breaker, and tag the switch that supplies power to the circuit breaker.

What type of circuit breaker is used on a multimeter?

Description : What type of circuit breaker is used on a multimeter?

Last Answer : A push button or push-pull circuit breaker (small size, low power).

What factors are used to select a circuit breaker?

Description : What factors are used to select a circuit breaker?

Last Answer : The power requirements of the circuit and the physical space available.

Where should you use a nontrip-free circuit breaker?

Description : Where should you use a nontrip-free circuit breaker?

Last Answer : In emergency or essential circuits.

What is a nontrip-free circuit breaker?

Description : What is a nontrip-free circuit breaker?

Last Answer : A circuit breaker that can be overridden if the operating mechanism is held ON.

What are the five main components of a circuit breaker?

Description : What are the five main components of a circuit breaker?

Last Answer : Frame, operating mechanism, arc extinguishers, terminal connectors, and trip element.

During maintenance of circuit breakers, _______________. A. always smooth roughened contact surfaces with a file B. never pass more than rated breaker current through the overload heater element C. inspect for wear and misalignment of main contacts D. assume heater elements installed are of correct size

Description : During maintenance of circuit breakers, _______________. A. always smooth roughened contact surfaces with a file B. never pass more than rated breaker current through the overload heater element C. ... wear and misalignment of main contacts D. assume heater elements installed are of correct size

Last Answer : Answer: C

In addition to testing the calibration of a circuit breaker, maintenance should include all of the following EXCEPT ______________. A. changing out of magnetic elements and thermal heaters yearly B. checking for corrosion, accumulation of dirt and thermal fatigue C. inspecting for loose or missing parts D. making sure foreign matter does not block tripping element

Description : In addition to testing the calibration of a circuit breaker, maintenance should include all of the following EXCEPT ______________. A. changing out of magnetic elements and thermal heaters yearly B. ... for loose or missing parts D. making sure foreign matter does not block tripping element

Last Answer : Answer: A

Attempting to parallel an AC generator which is out of phase with the bus will result in which of the following problems? A. The breaker should trip. B. The KVA will decrease. C. The synchronizing lamps will burn out. D. The power factor will be unitized.

Description : Attempting to parallel an AC generator which is out of phase with the bus will result in which of the following problems? A. The breaker should trip. B. The KVA will decrease. C. The synchronizing lamps will burn out. D. The power factor will be unitized.

Last Answer : Answer: A

Component F in the illustrated device is for _________. EL-0033 A. short circut protection B. latching the trip unit closed after resetting the breaker C. overload protection D. providing a flexible connection between the input terminal G and the tripping unit E

Description : Component F in the illustrated device is for _________. EL-0033 A. short circut protection B. latching the trip unit closed after resetting the breaker C. overload protection D. providing a flexible connection between the input terminal G and the tripping unit E

Last Answer : Answer: C

What do mean by trip free system in breaker?

Description : What do mean by trip free system in breaker?  

Last Answer : In trip free the breaker is free to trip at any time. If both close and trip signal is present at same time (instant) the breaker will attempt to close and positively trip. When the breaker trips it will not close again even if closing signal exists because of anti pumping feature. 

What three types of storage elements most often are used in modulators?

Description : What three types of storage elements most often are used in modulators?

Last Answer : Capacitor, artificial transmission line, or pulse-forming network.

What three types of storage elements most often are used in modulators?

Description : What three types of storage elements most often are used in modulators?

Last Answer : Capacitor, artificial transmission line, or pulse-forming network.

What are the types of air blast circuit breaker?

Description : What are the types of air blast circuit breaker?

Last Answer : Arial-blast type Cross blast Radial-blast

A three-phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is

Description : A three-phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is  (A) 1200 A (B) 3600 A (C) 35 kA (D) 104.8 kA

Last Answer : A three-phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is 35 kA 

What are the three types of circuit control devices?

Description : What are the three types of circuit control devices?

Last Answer : Switches, solenoids, and relays.

How does each type of trip element react to an overload?

Description : How does each type of trip element react to an overload?

Last Answer : he thermal trip element makes use of a bimetallic element that bends with an increase in temperature or current. The bending causes the trip bar to be moved releasing the latch.

Microcircuit refers to any component containing what types of elements?

Description : Microcircuit refers to any component containing what types of elements?

Last Answer : Integrated circuits.

What is the name given to the semiconductor device that has three or more elements?

Description : What is the name given to the semiconductor device that has three or more elements?

Last Answer : Transistor

Electrical jellies! Got a circuit breaker (home) that has popped and won't reset. Suggestions?

Description : Electrical jellies! Got a circuit breaker (home) that has popped and won't reset. Suggestions?

Last Answer : My husband, who was a master electrician, said you need to call a professional. You either have a bad breaker or the breaker that refuses to reset is saving your life because you have a dead short some place and your house would burn down if ithe breaker wasn’t tripped.

My (soon-to-be-replaced) air conditioner is frequently tripping the circuit breaker in my apartment. What can I do to prevent this?

Description : My (soon-to-be-replaced) air conditioner is frequently tripping the circuit breaker in my apartment. What can I do to prevent this?

Last Answer : answer:A mini-split AC unit will use less power than a regular square version and should help with the problem. However if your problem resides in old wiring with a lower amperage/threshold you might ... every time you want to use it but this has cut my electric bill dramatically. Hope this helps

What is the difference between a fuse and a circuit breaker ?

Description : What is the difference between a fuse and a circuit breaker ?

Last Answer : Fuse : It is a type of soft metal wire which, when more than the required current flows through the wire, burns it, disconnects the electrical circuit from the source and protects the valuable ... or fault in the power supply line . This breaks the static contact and protects it from accidents.

Why is the circuit breaker turned off automatically ?

Description : Why is the circuit breaker turned off automatically ?

Last Answer : Circuit breakers are automatically turned off to protect electrical equipment from damage. An automatic switch is used to protect the electrical circuit or electrical equipment from damage due to ... is stopped and the electrical equipment connected to the circuit is protected from damage.

What is Earth Leakage Circuit Breaker ?

Description : What is Earth Leakage Circuit Breaker ?

Last Answer : Earth leakage circuit breaker is a protective device which protects the leaky faulty or faulty circuit from dangerous parts by separating it from the good parts. The leakage current of the circuit flows ... a faulty place due to a leakage error in the circuit is called a leakage circuit breaker.

What is an Air Circuit Breaker ?

Description : What is an Air Circuit Breaker ?

Last Answer : Air circuit breaker is a circuit breaker which is controlled by air, that is, a breaker which is turned on by air pressure and turned off by air pressure .

What is Oil Circuit Breaker ?

Description : What is Oil Circuit Breaker ?

Last Answer : An oil circuit breaker is a circuit breaker that contains oil and is in operation or on-off insulation oil . The oil used in the oil circuit breaker acts as insulation and extinguishes the arc. ... types. A) Plain brake type bulk oil circuit breaker and b) Arc controlled bulk oil circuit breaker.

What is a circuit breaker ?

Description : What is a circuit breaker ?

Last Answer : When excessive current flows in any faulty circuit , it is called circuit breaker which disconnects automatically or automatically.

What is the reason for using circuit breaker in circuit ?

Description : What is the reason for using circuit breaker in circuit ?

Last Answer : Circuit breakers are used for safety.

What is the function of circuit breaker ?

Description : What is the function of circuit breaker ?

Last Answer : Used to stop excessive flow

What are the common sizes of circuit breaker panel for all electrical home?

Description : What are the common sizes of circuit breaker panel for all electrical home?

Last Answer : 200 amp is the most common size used in most homes.

Coast Guard Regulations (46 CFR) require each switchboard to have ___________. A. non-conductive deck covering at the frount B. non-conductive deck coverings at the rear C. a name plate for each circuit breaker D. all the above

Description : Coast Guard Regulations (46 CFR) require each switchboard to have ___________. A. non-conductive deck covering at the frount B. non-conductive deck coverings at the rear C. a name plate for each circuit breaker D. all the above

Last Answer : Answer: D