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100 amps mccb trip when charged it is connected to small power transformer?
Wiki User
∙ 15y ago
what is the fault in the transformer, it trips when it is charged.it is charged through the 100 amps MCCB.
Wiki User
∙ 15y ago
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When secondary coil is open there is no current in the primary coil WHY?
I am assuming the question is about the power / distribution transformer and not the current transformer. The primary current is a function of load connected on secondary. With the open secondary, there is no load, no current, it is open circuit. Hence no primary current. However there is always some small amount of no load current in the primary winding.
What is percentage of transformer loss at no load condition?
major component of power loss in a transformer is secondary resistance.when transformer is operated under no load,no current flows through the secondary.so under no load conditions transformer has just very small megnetic losses.
Why not a step up transformer be used to increase the power generated many times and solve energy crisis?
Because a transformer does not generate power, it transformers it. Power is equivalent to the voltage times current. A transformer with a ratio of N1:N2 takes voltage (V1) and current (I1) at one winding and transforms it into (N2/N1)*V1 voltage and (N1/N2)*I1 current at the other winding. So the input power is V1 * I1, and the output power is (N2/N1)*V1*(N1/N2)*I1 = V1*I1 (ignoring the small amount of losses associated with the transformer).
What is the purpose of isolation transformer?
An isolation transformer (or more commonly, amplifier) reduces noise in the system from the power source. This is especially necessary in medical applications where the signals that are being read are very tiny and even a small amount of noise can disrupt a signal and make it unreadable.
Why zigzag connection in transformer is required?
A zigzag transformer is used in connection with 3 phase and is made up of 6 coils connected in a "Y" manner. Each leg of the "Y" is made up of a coil on a different phase leg of the transformer. The neutral formed by the zigzag connection is very stable. Therefore, this type of transformer, or in some cases an auto transformer, lends itself very well for establishing a neutral for an ungrounded 3 phase system. Many times this type of transformer or auto transformer, lends itself very well for establishing a neutral for an ungrounded 3 phase system. Many times this type of transformer or auto transformer will carry a fairly large rating, yet physically be relatively small. This particularly applies in connection with grounding applications. The reason for this small size in relation to the nameplate KVA rating is due to the fact that many types of grounding auto transformers are rated for 2 seconds. This is based on the time to operate an overcurrent protection device such as a breaker. Zigzag transformers used to be employed to enable size reductions in drive motor systems due to the stable wave form they present. Other means are now more common, such as 6 phase star.
Why no load current in transformer small?
No load current is energizing current. This is effectively "lost" power, power used in the transformer to energize the core. It, therefore, should be small!
How do you find the maximum amp draw on a step up transformer?
It depends on the load. A good transformer has over 90% (some as high as 99%) efficiency. So the power drawn by it is a function of the power in the load, plus a small amount due to losses in the transformer.
How to removed a dc offset from the output of a frequency generator connected to a test circuit?
Run the test signal through a small isolation transformer.
When secondary coil is open there is no current in the primary coil WHY?
I am assuming the question is about the power / distribution transformer and not the current transformer. The primary current is a function of load connected on secondary. With the open secondary, there is no load, no current, it is open circuit. Hence no primary current. However there is always some small amount of no load current in the primary winding.
How can you convert 240v to 120v for ac?
Use a step down transformer 240 primary to 120 secondary. You must know what the connected load (amps) is so that you don't overload the transformer. Small transformers are rated in VA.
What is meant by the optimal design of power transformer?
It depends on the purpose - do you want the transformer to be low loss? As small as possible? to be able to withstand large power surges? as quiet as possible? To be able to operate for a wider than normal range of frequencies?Power transformer design is a very big topic. Many engineers spend their entire careers dedicated to optimizing transformers for specific purposes.
How does the alternator recharge the battery?
An alternator is just a small generator that generates AC power and is converted to 12v DC power via a transformer for battery storage and use.
How do you convert 110v to 5v?
Depending on the application and other factors, it will TYPICALLY be best to use a transformer. If it's a low current application, you can purchase a small 5V power supply transformer for under $20.00, US.
How relay used for protection purpose?
Relay are operated by small current /voltage connected to Secondary side of Current Transformer and /or Voltage Transformer. The signal stimulates the magnetic substance nearby with the attracting force. This closes or opens the circuit being used in protection purpose.
What is percentage of transformer loss at no load condition?
major component of power loss in a transformer is secondary resistance.when transformer is operated under no load,no current flows through the secondary.so under no load conditions transformer has just very small megnetic losses.
How can install power transformer?
If you are referring to 'power transformers' used in transmission systems, then the requirements are far too complicated to be answered in this forum. If, on the other hand, you are referring to a 'power transformer' in the sense of a small transformer used to reduce your mains or supply voltage at home, then the volt ampere rating of the transformer must equal or exceed the load requirement. The primary and secondary voltages must match the primary supply voltage and the voltage requirement for the load. Any requirements for earthing (grounding) must be observed.
Why not a step up transformer be used to increase the power generated many times and solve energy crisis?
Because a transformer does not generate power, it transformers it. Power is equivalent to the voltage times current. A transformer with a ratio of N1:N2 takes voltage (V1) and current (I1) at one winding and transforms it into (N2/N1)*V1 voltage and (N1/N2)*I1 current at the other winding. So the input power is V1 * I1, and the output power is (N2/N1)*V1*(N1/N2)*I1 = V1*I1 (ignoring the small amount of losses associated with the transformer).
