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Why DC rating of Relay contacts is lesser than AC rating you need theoretical approach?
100 v DC is not the same as 100v AC the AC will be 141v which can arc over the contact if rated as 100 v DC.
The deal is that when switches open and close they arc for a short period of time. This is the main factor in wearing out the switch. Because AC automatically alternates back and forth, the arc is naturally extinguished faster. The DC, however, sustains the arc until the switch gap is large enough to shut it down. Therefore, the DC ratings must be lower to provide the same switch life and reliability.
What else can I help you with?
What is the Electrical circuit breaker making and making capacity?
making current is a peak value attain at first cycle when the circuit breaker is close.the making current rating is expressed in "peak" value of the maximum ac current it can safely close on that's why it is always have higher value than breaking current. Making current is limited by the withstand capability of the contacts. Breaking current is based on the ability of the contacts to interrupt the current. If the contacts are not able to interrupt the current when they open, the heat energy in the resulting arc will often destroy the device. the breaking current rating is expressed in RMS value of the current.
What is the ton rating for a 150000 btu rating?
12.5 tons
What is the power rating for a 10amp dc load?
It depends on the voltage rating.
How do you find the current rating of a zener diode if the power rating is 500mw and a voltage rating of 10v?
A zener diode with a rating of 500 mW will pass 50 mA at 10 V. (Power = voltage times current)Note: The question appears mis stated, in that it states a rating of 500 MW, not 500 mW. To my knowledge, there is no zener with a rating of 500 MW.
How do you calculate the efficincy of gas burner?
Divide the output rating by the input rating
What is the typical rating of a hot wire relay contacts?
The typical rating of a hot wire relay contacts is 35 amp
What is a typical rating of a hot wire relays contact?
The typical rating of a hot wire relay contacts is 35 amp
How do you Calculate the contact rating of relay for AC and DC?
On the side of the relay there is a name plate that tells you the current carrying capacity of the contacts. It gives you the ratings at different AC voltages and a DC rating of the contacts at different voltages.
What does a AAA rating mean?
Awsome Axe Approach
Is there a theoretical limit to how strong a chess player can become?
No. Your rating stops at 9999, but your knowledge can go on forever.
One approach to content filtering is through a rating system of?
BSA
What is the current rating for a 48 VDC contact relay?
The current rating for a 48 VDC contact relay can vary depending on the specific model and manufacturer. It is recommended to check the datasheet or specifications provided by the manufacturer to determine the exact current rating for the relay you are using.
Why the size of a fuse holder increase as the rating of a fuse?
As a general rule, the larger the current rating of the fuse, the larger will be the fuse holder (or at least the metal contacts) because it will have to be capable of handling larger currents without overheating.
Can you use a 20 amp fuse for a 15 amp surge protector safely?
No. If you use a larger fuse you are not protecting the device which has a rating of a lesser value.
Will a circuit breaker give off less amperage?
A circuit breaker does not give off amperage. A circuit breaker allows a flow of current up to the rating of the breaker. Any current higher than that of the breaker's rating will open the breaker's contacts and stop the flow of current.
What is the E L O rating in chess?
The ELO chess rating system is named after Arpad Elo who created the chess rating system predicated upon a number of statistical characteristics . The ELO rating depth also states something over the depth of the game . This total depth of a game is defined by two end points of the range of skills : the total beginner and the theoretical best play by an infallible, almighty opponent .Look to the related link below .
What has the author William Fraser Rannie written?
William Fraser Rannie has written: 'An approach to the prediction of suspended sediment rating curves' -- subject- s -: Sediment transport
