What does the T and R keys mean by the circuit breaker

The T and R buttons of the circuit breaker are the test buttons.

The circuit breaker is capable of closing, carrying and breaking the current under normal loop conditions and can be turned off for a specified period of time.

A switchgear that closes, carries and breaks the current under abnormal circuit conditions. Circuit breakers are divided into high-voltage circuit breakers according to their range of use.

With low-voltage circuit breakers, the division of high and low voltage lines is relatively blurred, and generally more than 3kV is called high-voltage electrical appliances.

Circuit breakers can be used to distribute electrical energy and start asynchronous motors infrequently.

It protects power lines and motors, and automatically cuts off circuits when they have serious overloads, short circuits, undervoltages, etc., and its functions are equivalent to fuses.

type switch and underheating relay.

and so on. In addition, it is generally not necessary to change the parts after the fault current is switched off. At present, it has been widely used.

In the generation, transmission and use of electricity, power distribution is an extremely important link. The power distribution system includes transformers and various high and low voltage electrical equipment, and the low voltage circuit breaker is a kind of electrical appliances that are widely used.

The T and R buttons of the circuit breaker are the test buttons.

The circuit breaker can be used to distribute electric energy, start the asynchronous motor infrequently, protect the power supply line and the motor, and automatically cut off the circuit when they have serious overload or short circuit and undervoltage and other faults, and its function is equivalent to the combination of fuse switch and over/underheat relay. In addition, it is generally not necessary to change the parts after the fault current is switched off. At present, it has been widely used.

The T and R buttons of the circuit breaker are the test buttons.

The precautions for the operation and maintenance of the circuit breaker are as follows:

1. A system should be formulated, maintained by a special person, regularly tried to jump, and a good operation record.

2. In case of problems, they should be analyzed and dealt with, and they should not be withdrawn from operation without authorization, or consciously invalidated.

3. Tripping during normal operation, if the cause is motor start or high current impact, take alternate start, adjust the positioning appropriately, or avoid the impact with a short delay. If the leakage current increases due to rain or other reasons, the sensitivity can be temporarily adjusted.

T is the test button and R is the reset button

The abbreviation of the word TRIP, TR button is the button of the manual circuit breaker.

The R key and the T key on the circuit breaker are respectively, the R key, which is the reset key, is the first letter of the word RESET reset. When the circuit breaker trips after the leakage trip, this button pops up, if this button is not manually reset back, the circuit breaker will not be closed.

The T button is the test key, which is the first letter of the word test test, pressing this button is equivalent to the leakage phenomenon of the power supply amplifier, and the reset button will pop up. This button needs to be pressed once a month to ensure that the leakage protection function is normal.

Although it is confirmed that the demand curve arises naturally from the theory of consumer choice, the derivation of the demand curve itself is not a theory that proposes consumer behavior. Simply determining how people react to change doesn't require a rigorous analytical framework. However, consumer choice theory is extremely useful.

As we will illustrate in the next section, we can use this theory to more deeply determine the factors that determine family behavior.

Instant Answer Draw budget constraint lines and indifference curves for Pepsi and pizza. Illustrate what happens to the budget constraint line and consumer optimum when pizza** rises. Use your graph to divide this change into income effects and substitution effects.

Four applications. Now that we've established the basic theory of consumer choice, we can now use it to illustrate four questions about how the economy works. However, since each problem involves family decision-making, we can address these issues with the consumer behavior model we just proposed.

Are all demand curves sloping to the bottom right?

In general, when an item** goes up, people buy less. Chapter 4 refers to this normal behavior as the law of demand. This pattern manifests itself in the demand curve sloping to the lower right.

However, as far as economic theory is concerned, the demand curve also sometimes slopes to the upper right. In other words, consumers sometimes defy the law of demand and buy more when one item rises. To illustrate how this can happen, look at Figure 21-12.

In this example, the consumer buys two items – meat and potatoes. Initially, the consumer budget constraint line was a straight line from A to B. The best advantage is c.

When the potato ** rises, the budget constraint line moves inward and is now a straight line from A to D. Now the best thing is e. It is important to note that the rise in potatoes has led consumers to buy more potatoes.

TR is the abbreviation of the English word TRIP (jump open, jump off), and the TR button is the button that manually breaks the circuit breaker.