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How many a4s go into an a1?
An A1 sheet measures 594 x 841 mm, while an A4 sheet measures 210 x 297 mm. To determine how many A4 sheets fit into an A1, you can divide the area of the A1 sheet by the area of the A4 sheet. This calculation shows that 8 A4 sheets can fit into one A1 sheet.
How do you wire a star delta motor?
This answer has been temporarily closed to changesbecause so many askers have been repeatedly splitting-off variants of the question such as "Can you give me simple diagram for star-delta starter".Please note: diagrams cannot be included in answers.The answer given includes plenty of details for anyone to be able produce a simple diagram showing how a 3-phase motor can be wired in star and delta configurations.AnswerTo be able to wire a 3-phase motor either in star or delta, all 6 ends of the three sets of coils, called "windings", have to be exposed with suitable connection terminals.The windings are often labelled A1, A2, A3 and B1, B2, B3, where "1", "2" and "3" denote the separate phase windings and "A" and "B" denote the beginning and end of each winding.Another way of describing it is to say that the separate windings can be labelled:Winding 1: A1 B1. Winding 2: A2 B2, Winding 3: A3 B3.In star configuration either all the A's or all the B's are connected together and the 3-phase supply (consisting of three separate "phase lines" labelled L1, L2, L3) is connected to the remaining three connectors. For example, if you connect B1 to B2 and B2 to B3 to form the center of the "star" then you must connect supply L1 to A1; supply L2 to A2 and supply L3 to A3.In delta configuration, connect B1 to A2, B2 to A3, B3 to A1. (If you draw that out as a schematic diagram, it will be a triangle.) Then connect supply L1 to A1; supply L2 to A2 and supply L3 to A3. (Exactly the same as the supply lines were connected before, for the star configuration.)The initial making of those connections in "star" - and subsequent changing into "delta" after the motor has built-up sufficient speed - would all normally be handled by a "star-delta motor starter" unit. A good tip: before you ever start hooking one up, study its schematic wiring diagram carefully to be sure you really understand which of its terminals connect to which motor terminals, and where to connect each line of the 3-phase service cable.Note:Some 3-phase motors use an alternative way of labelling the windings: 1A, 1B, 1C and 2A, 2B, 2C.Electronic motor-control systems, which offer soft-starts in DELTA configuration, are now replacing the use of manual or semi-automatic star-delta starters.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
What does A1 travel stand for?
A1 means "top quality" or "first class." The slang originated in the 1720s when ships were classified in registries by letter and number "A1" would be the best, highest class ship. So A1 Travel means roughly First Class Travel or Top Quality Travel.
What are the answers for think-a-grams a1?
School stay
Who uses A1 drawing boards?
A1 drawing boards are mostley used for builders when designing houses or small scale shops they are not used for huge scale developments.
What wires go to what terminals on a three phase contactor?
The incoming voltage from the source goes to L1,L2 and L3 terminals. The Load connects to T1, T2, and T3. The coil voltage goes to A1 and A2. The stop ,start circuit is in series with the N.C. contacts on the contactors overload block. Usually numbered 95 and 96.
What is A1' A2 on auxiliary contacts?
A1' and A2 are terminals on auxiliary contacts used in electrical circuits, typically associated with relays or contactors. A1' generally represents the positive or input terminal, while A2 is the negative or return terminal. These terminals are crucial for controlling the operation of the relay or contactor, enabling the switching of larger loads based on a smaller control signal. Proper connection of A1' and A2 ensures the correct functioning of the auxiliary contacts in the circuit.
How many wires to control a mechanically held contactor?
A contactor is a type of switch. However this switch uses electricity to power an electromagnetic coil to switch on or off power. Hence a contactor needs 2 wires - A live/hot wire and a neutral wire. Generally these are connected across the A1 and A2 terminals of the contactor.
What is the difference between a Delta-connected and a Y-connected transformer?
With three windings, you have six terminals. Call them A1, A2, B1, B2, C1, and C2, representing phase A, B, and C. In the delta configuration, A1 is connected to C2, C1 is connected to B2, and B1 is connected to A2. Power is from phase to phase - A1C2, C1B2, and B1A2. In the wye configuration, A2, B2, and C2 are connected together, and are usually connected to neutral. Power is from phase to neutral - A1, B1, and C1.
How do you select contactor for motor?
With a contactor we can control the power connection to the motor (power on/off). A typical AC contactor comes with 4 terminals aside (L1,L2,L3,A). 'A' has A1,A2 terminals which are of the magnetizing coil. By magnetizing & demagnetizing A1-A2 coil, power line connections to motor can either be made or broken. This is a simple DOL (Direct On Line) application. Further, reverse/forward circuits and star-delta circuits can be constructed based on the requirement. A contactor's role in whatever application is 'making or breaking' the contact. The coil supply can either be AC or DC.
What is an electrical star delta configuration?
A star configuration of the windings in a 3-phase transformer or motor is where one end of each winding is connected to form a star or 'Y' pattern and the other ends are each connected to one of the three separate lines of the incoming 3-phase electrical service.A delta configuration is when each phase winding of a three phase transformer or motor is connected to its two adjacent phase windings to form an arrangement that looks like the Greek letter delta - or triangle - and then each point of the triangle is connected to to one of the three separate lines of the incoming 3-phase electrical service.To be able to wire a 3-phase transformer or motor either in star or delta, all 6 ends of the three sets of coils, called "windings", have to be exposed with suitable connection terminals.The windings are often labelled A1, A2, A3 and B1, B2, B3, where "1", "2" and "3" denote the separate phase windings and "A" and "B" denote the beginning and end of each winding.Another way of describing it is to say that the separate windings can be labelled:Winding 1: A1 B1. Winding 2: A2 B2, Winding 3: A3 B3.In star configuration either all the A's or all the B's are connected together and the 3-phase supply (consisting of three separate "phase lines" labelled L1, L2, L3) is connected to the remaining three connectors. For example, if you connect B1 to B2 and B2 to B3 to form the center of the "star" then you must connect supply L1 to A1; supply L2 to A2 and supply L3 to A3.In delta configuration, connect B1 to A2, B2 to A3, B3 to A1. (If you draw that out as a schematic diagram, it will be a triangle.) Then connect supply L1 to A1; supply L2 to A2 and supply L3 to A3. (Exactly the same as the supply lines were connected before, for the star configuration.)For more information see the answers to the Related Questions shown below.
What is true regarding the double pole thermostat whit a contactor illustrated in figure a1?
A double pole thermostat with a contactor typically functions to control high-voltage circuits by providing a safe means to switch power on and off. It usually has two sets of contacts that allow it to control both the live and neutral wires, ensuring complete disconnection of the circuit. The contactor acts as a relay, enabling the thermostat to manage larger electrical loads without direct handling of high current. This setup is commonly used in HVAC systems and other applications where temperature regulation is required.
What would be the label for the top left cell?
Its address would be A1.Its address would be A1.Its address would be A1.Its address would be A1.Its address would be A1.Its address would be A1.Its address would be A1.Its address would be A1.Its address would be A1.Its address would be A1.Its address would be A1.
Write a C algorithm to test whether the three numbers represent the sides of a right angle triangle?
1. sort desc, so a1 >= a2 >= a3 2. check if (a1*a1 == a2*a2 + a3*a3) then true
What happens in Excel when a user presses Ctrl Home?
It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.It will bring you to cell A1 in the worksheet.
Formula for sum of cells A1 to A5?
While there are many ways of doing it, the simplest way is to use the SUM function and a range in it like this: =SUM(A1:A5)
What is the formula to find sum of cells a1 a2 and a3?
There following two options should work:=sum(A1:A3) or=A1+A2+A3
