0
How do you isolate magnetism remaining in the core of a electromagnet after the coil current is removed?
Your question is confusing, as you do not explain what you mean by 'isolate'. If you mean 'allow the core to retain some magnetism', then this will always be the case when the current through the coil is reduced to zero. In order to remove this 'residual magnetism', you will need to reverse the direction of current through the coil. This is a feature of what is known as 'hysteresis', by which changes in the flux density of a core 'lags behind' changes to the magnetic field strength that creates it.
What else can I help you with?
Why are Isolatorts not opened on Load?
To interrupt the current requires a more-expensive circuit-breaker. An isolator is used to isolate a section of power line after the current has been stopped.
What happens to voltage when a single line opens on a three phase delta transmission system?
When a single line opens in a three-phase delta transmission system, the voltage in the remaining lines can increase due to the loss of the return path for the current. This phenomenon can lead to an unbalanced voltage condition, potentially causing overvoltage on the remaining phases. Additionally, the system may experience increased current on the other two lines, which can result in overheating and damage to equipment if not properly managed. Protective devices are typically employed to detect such faults and isolate the affected section of the system to maintain stability and safety.
Why current transformers are required in protective relaying scheme?
Current transformers (CTs) are used to monitor the current (or lack of) in high-voltage systems, and their secondary outputs controls the behaviour of protection-system relays. The CTs (1) reduce the current to values that match the current ratings of the protective relays, and (2) electrically-isolate the relays from the high-voltage system.
What are the disadvantages of a double wound transformer?
There is no disadvantage with a current transformer -it does exactly what it's supposed to do, that is:reduce the current flowing in the primary circuit to a value that can be handled by its burden (ammeter or protective relay).electrically-isolate its secondary circuit from the primary circuit.
Why you do analog to analog conversion?
To isolate a patient from getting connected to stray voltages. An isolation transformer is used and batteries power it to further isolate you from the real world. Also for sensitive measurements to eliminate some of the noise and current loops.
What purposes does an insulator serve?
An insulator is used to isolate current carrying components from conductive non current carrying components.
How do you isolate a solid that is dissolved in water?
One common method to isolate a solid dissolved in water is through the process of evaporation. By heating the water, the solvent evaporates, leaving behind the solid material. The remaining solid can then be collected for further processing or analysis.
Why are Isolatorts not opened on Load?
To interrupt the current requires a more-expensive circuit-breaker. An isolator is used to isolate a section of power line after the current has been stopped.
How do breakers work?
Circuit breakers can be of these types Fuse wire that melts when subjected to an over current. Magnetic. These contain a small electromagnet coil which becomes magnetised when a current flows through it. An over current operates a switch off mechanism which cannot be reset until the fault current is removed. Thermal, These contain a bimetallic strip that is heated by the fault current. The strip bends by uneven expansion of the two metals and operates a switch mechanism. Residual Current Device These monitor the current flowing to and from an electrical product. Any difference in current by a fault flowing via the earth protection wire will operated an electronic trip mechanism to isolate the device. Some breakers combine two of the above types eg thermal magnetic
About bus bar protection ques and ans?
Protection of busbars is mainly done using differential relays. These relays sense current flowing into the bus and current flowing out of the bus. If current in != current flowing out, the relay assumes there is a fault on the bus and trips breakers to isolate the bus.
What happens to voltage when a single line opens on a three phase delta transmission system?
When a single line opens in a three-phase delta transmission system, the voltage in the remaining lines can increase due to the loss of the return path for the current. This phenomenon can lead to an unbalanced voltage condition, potentially causing overvoltage on the remaining phases. Additionally, the system may experience increased current on the other two lines, which can result in overheating and damage to equipment if not properly managed. Protective devices are typically employed to detect such faults and isolate the affected section of the system to maintain stability and safety.
Is isolate a noun or verb?
isolate is a Verb... It is an action.
Is Basque an Indo-European language?
No. Though geographically surrounded by Indo-European Romance languages, Basque is classified as a language isolate. It is the last remaining descendant of the pre-Indo-European languages of Western Europe
Why current transformers are required in protective relaying scheme?
Current transformers (CTs) are used to monitor the current (or lack of) in high-voltage systems, and their secondary outputs controls the behaviour of protection-system relays. The CTs (1) reduce the current to values that match the current ratings of the protective relays, and (2) electrically-isolate the relays from the high-voltage system.
What are the disadvantages of a double wound transformer?
There is no disadvantage with a current transformer -it does exactly what it's supposed to do, that is:reduce the current flowing in the primary circuit to a value that can be handled by its burden (ammeter or protective relay).electrically-isolate its secondary circuit from the primary circuit.
Can you write a sentence for isolate?
"The teacher wanted to isolate the girl from the rest of the class."
How can flood isolate townships?
A flood could possibly isolate a township if it does a lot of damage to the area. It can also isolate a township if the roads into the town are no longer passable.
