What does withstanding mean?
Definition of withstand transitive verb. 1a : to stand up against : oppose with firm determination especially : to resist successfully. b : to be proof against : resist the effect of withstand the impact of a landing — Current Biography. 2 archaic : to stop or obstruct the course of.
What is rated peak withstand current?
The rated peak withstand current (dynamic stability) of a high-voltage circuit breaker refers to the first half-wave current peak value of the rated short-term withstand current that the circuit breaker can carry under the specified use and performance conditions at the closing position.
What are the different type of LV breakers according to its classifications?
There are two types of circuit breakers based on the voltage level. They are: Low Voltage Circuit Breakers, which are intended to be used at voltages up to 1000V. High Voltage Circuit Breakers, which are intended to be used at voltages greater than 1000V.
How do you use the word withstand?
stand up or offer resistance to somebody or something.
- What sort of substance could withstand those temperatures?
- Their arguments do not withstand the most superficial scrutiny.
- The vehicle is sturdy enough to withstand rough terrain.
- This fabric can withstand steam and high temperatures.
What is difference between stand and withstand?
As verbs the difference between withstand and stand is that withstand is to resist or endure (something) successfully while stand is to support oneself on the feet in an erect position.
What is short-circuit withstand current?
The short circuit current withstand capability is a measure of the short circuit current a device can tolerate without being damaged when a fault occurs on the output of the device. It is usually defined in terms of the short circuit current capability of the source or system.
What is meant by rated current?
“Rated current” is defined by the following: Generally, rated means that the product is marked on the nameplate with the “rating”. E.g. 100-120Vac, 1A, 50/60Hz. Then, in most standards, there is an “input current/power test” where you verify that you do not exceed the rating by more than 10%.
What is difference between switchboard and panelboard?
Panelboards are typically flush mounted or surface mounted and are limited to a maximum of 1,200 A incoming current (main). Switchboards are free-standing units that are front connected and, like panelboards, require only front access. However, switchboards can allow for both front and rear access if desired.
What are the classes of circuit breaker?
There are three basic circuit breaker varieties: standard breakers (which include both single-pole and double-pole circuit breakers), ground fault circuit interrupter circuit breakers (GFCIs) and arc fault circuit interrupter circuit breakers (AFCIs).
What are the different types of electrical breakers?
The three main types of circuit breakers are standard, GFCI and AFCI. Some models have dual functionality. Each handles different amp capacities and operates in different locations in the home.
What defines the middle class?
However, the middle class has also been defined as those earning between 67% to 200% of the median income or even those with certain consumption or wealth metrics.
What does it mean to be in the middle 5th class?
One of the narrowest definitions limits it to those who are literally in the middle fifth of the nation’s income ladder. A wider characterization includes everyone but the poorest 20% and the wealthiest 20%. Displayed below is the Pew Research Center’s definition, which is two-thirds to two times the national median income for your household size.
What is a middle-class income?
This means that for a household of three, middle-class incomes range from $37,000 to $147,000. For us, this definition has six advantages. It is: broad enough to capture the identity of the American middle class.
How much does it cost to be middle class?
Regional disparities in income and the cost of living mean that salary-based measures of the middle class can vary greatly. Different income barometers describe the middle class as having income from $50,000 to $150,000 or, in some instances, $42,000 to $125,000. Other measures of middle class set the upper income mark at $250,000.