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Why percentage differential relay is not suitable for detecting the earth fault near neutral of an wye connected winding?
when earth fault occurs very near to the neutral point of wye winding, the voltage available for driving earth fault current is small. Hence fault current is low. Relay has to be too sensitive and then it can operate for spurious signals like external faults, switching surges etc.
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How does current transformer works in a substation?
A current transformer works on the same principle as that of a simple transformer however it steps down the high current into a low level so that it can be measured using an ammeter of a suitable range. In some current transformers extra cores are provided. This is done in order to prevent the faulty currents i.e. the over currents, earth faults, differential protections. The extra cores of a C.T. gets saturated as soon as the faulty currents starts flowing and thereby does not harm the main core of the transformer and the ammeter connected. The C.T. is always connected in the line carrying current. It first steps down the current to a measureable form and further gives this current to the ammeter.
What motor is NOT suitable for use as a DC machine?
What motor is NOT suitable for use as a DC machine?
Which type of welding machine is not suitable for E308l-15 electrodes?
3 types Of welding machine suitable for E 308-15 electrodes?
What is the function of restraining coils in differential relay?
Restraining coils are also called as bias coils. Due to the difference in the magnetizing currents of the upper and lower current transformers the current through the operating coil will not be zero even under normal loading conditions or external fault conditions. therefore to provide stability on external faults bias coils are provided. To obtain the required amount of biasing a suitable ratio of the biasing coils with restraining coils to be provided.
Reconnect electric meter yourself?
Even if you know how to reconnect it safely, you can probably be charged with theft if you reconnect it without authorization. Whatever the reason it was disconnected, the electric company may want to inspect or test the connected wiring to be sure it is suitable condition to be reconnected. You will not likely be authorized to connect it yourself. Likely only electric company personnel or a licensed electrician would be authorized.
What percentage of land was suitable for farming?
16%
You want to know the suitable percentage of the liver functions?
no, i don't.
What moisture percentage is considered Dry firewood?
Under 20% is considered suitable for burning. I aim for 15%.
What percentage of land in Greece was usable for farming?
Approximately 38% of the land in Greece is suitable for farming.
What type of differential gear oil does for escalade Cadillac 2007?
For a 2007 Cadillac Escalade, it is recommended to use a high-quality differential gear oil that meets the specifications of GM's 9986115 or equivalent. Typically, a 75W-90 weight synthetic gear oil is suitable for the rear differential. Always check the owner's manual or consult with a professional to ensure the correct type and viscosity for your specific vehicle configuration.
What are the four major points of the theory of natural selection?
1. Overproduction - more offspring are born than survive 2. Genetic Variation - there is variation in the population 3. Struggle to Survive - organisms with suitable variations will survive and reproduce 4. Differential Reproduction - suitable variations are passed on to offspring
What is the differential fluid capacity of a 1995 mercury grand marquis?
The differential fluid capacity for a 1995 Mercury Grand Marquis is approximately 1.5 quarts. It's important to use the recommended type of fluid, typically a high-quality gear oil suitable for the vehicle's rear axle. Always refer to the owner's manual for specific guidelines and recommendations.
Which radiation would you use to check for leaks in pipes?
You would use a gamma radiation source to check for leaks in pipes. Gamma radiation can penetrate materials, making it suitable for detecting leaks in pipes without damaging them.
Which indicator would you use in the titration sulphuric acid with naoh?
In the titration of sulfuric acid with sodium hydroxide (NaOH), a pH indicator suitable for a strong acid-strong base titration, such as phenolphthalein, can be used. Phenolphthalein changes color at around pH 8.2-10, which is suitable for detecting the endpoint of the neutralization reaction between sulfuric acid and sodium hydroxide.
How can I determine if sunflower seeds are suitable for planting?
To determine if sunflower seeds are suitable for planting, you can perform a germination test. Place a few seeds on a damp paper towel and keep them in a warm, sunny spot. Check after a few days to see if they have sprouted. If a good percentage of the seeds have sprouted, they are likely suitable for planting.
What differentials does a 2001 jeep Cherokee sport sport 4.0 have?
The 2001 Jeep Cherokee Sport 4.0 typically features a Dana 30 front differential and a Dana 35 rear differential in its standard configuration. Some models may be equipped with a Chrysler 8.25 rear differential, especially if they have the optional towing package or other performance upgrades. The 4.0-liter inline-six engine provides ample power for these differentials, making the Cherokee suitable for both on-road and off-road driving.
What work resistor?
when a resistor is connected in a circuit it drop some voltage across it.when a circuit have large input voltage then by using a resistor of suitable value we get the desired voltage.
