Why suspension insulators preferred for high voltage power transmission?
'Suspension' type insulators are less expensive to manufacture than 'pin' type insulators for voltages in excess of around 33 kV. Each 'dish' is designed for specific voltage (e.g. in the UK, typically 11 kV), and several can be added to form a 'string' to match any desired voltage level. This inceases their versatility. Suspension insulators also allow for greater lateral movement of the conductors.
Advantages and disadvantages of high rupturing capacity fuses?
advantages.
1: they are capable to carry high as well as low fault current.
2: they don't deteriorate with the age.
3: they have high speed of operation.
4: they don't need any maintenance.
Difference of step up and step down in terms of no of loops in the secondary coil?
If the primary coil has ten loops and the secondary coil has five loops then the secondary coil works as a 50% step down
This will flip when a circuit in a house becomes overloaded?
A circuit breaker has a small handle that will flip to the open position due to overload.
What is armature current according to generator terms?
Generator is a machine which converts mechanical energy into electrical energy.
For conversion of mechanical energy in to electrical energy, it uses electromagnetic induction principle.
For electromagnetic induction to happen, three things are required.
These are:
So, when the conductor starts rotating through the magnetic field or the magnetic field cuts the conductor, emf( electromotive force) or voltage is induced in the conductor.
So, the conductor in which the voltage is induced in it is known as armature
What are the causes of failure of self excited generator?
there is problem in AVR and magnetic strength.
What is the basic principle of ADC?
simple comparator technique.
An analog-to-digital converter (abbreviated ADC, A/D or A to D) is a device which converts a continuous quantity to a discrete time digital representation.
How we calculate load of electrical instrument?
I am not an electrical guy....but since this question was left unanswered....i'll just put in some nonsense!!
For AC Load: VxIxPF (V=VoltageRequired, I=Current Required, PF=Power Factor) The Power Factor is normally considered to be 0.8 as a thumb rule.
For DC Load: VxI, here the power factor is consisdered to be 1, since it is a DC current
!!
Byeee!
To really honest with you nylon and a type of cotton are water resistant materials.With nylon water just slips of no problen, that's why they make umbrellas and winter\spring jackets out of them.But that's just water resitant materials.
What is electronic and electrical engineering?
The subject of Electrical Engineering deals with the utilisation of electrical power to provide us with a richer way of life. Electrical Engineering includes many different topics, from Power Generation and Distribution systems, to Electrical Machines such as motors and transformers, to Electrical Appliances such as electric toasters, refrigerators and freezers, televisions, etc. In general such items are all built using many different kinds of electrical components. (Wires and cables, resistors, capacitors, inductors, lamps, batteries, etc. are examples of just a few different electrical components.) Electronics Engineering is a specialised branch of Electrical Engineering which deals with components such as semiconductor diodes, triodes, transistors, computer and similar microcircuit chips, printed circuit boards, etc. Depending on where they are to be used (the applications), electronic circuits can be built to handle a very wide range of power, ranging from such things as radios, computers, mobile phones, which can require power in a range of a few mW (mW = milliWatts = thousandths of a Watt) to less than 100 Watts, to much more powerful circuits for things such as power control systems for things which can generate or consume many MW. (MW = MegaWatts = thousands of Watts.)
What are the three Spheres of quality?
The three spheres of quality are:
Quality Managament
Quality Assurance
Quality Control
Why line to ground fault is more common in transmission lines?
Because it is easier to get something to conduct to one phase as opposed to two or more. Lightning usually strikes closest to one phase, and may ionize the air enough to cause one phase to flash over to ground. Farmers sometimes run equipment into power lines; they usually stop when they hit the first wire (may blow the tires right off the vehicle they're driving, cook the engine, etc.). Birds, and small animals usually can't bridge the distance sufficiently between two conductors to cause a flash over, but they sometimes can for a single phase to ground by moving along one string of insulators. The exception to this is large birds of prey - sometimes they like to perch on top of power lines, and they have been known to dive between phases to catch an animal - if this happens, and they're big enough, they won't make it.
Also, faults are very often cleared quickly, before more phases can get involved. I looked over some fault records for a line that was taken down when a small town decided to dynamite the ice in the river to prevent flooding- the ice dam came down river and broke the legs of an H frame. The fault record for one end indicated a single phase to ground fault. The fault record for the other end (cleared slower) indicated 1, then 2, then 3 phases as the line collapsed.
SMD = Surface Mounted Device.
The legs and contacts on the device are designed to be soldered onto the surface of the circuit board, on the same side as the device.
It provides for a smaller profile and designed for attachment by automated processes.
What do you mean by Electric drives?
elecric drives are basically big electric motors which are used to drive generators
actually there are no difference between ATS and AMF panels, because all of new ATS panels are now AMF panels.
The only things that AMF do more than ATS is to order the generating set to run after the main power source fail by sending start command to the generating set controller.
These days all ATS are AMF panels they send start command to the generating set once main power source fail so they become AMF panels.
AMF panels answered perfectly in this web site just write what is AMF panel?
Current designs kestrel 140 weight capacity?
2000 lbs. Above answer was previously given, and is wrong. Not sure what that person was thinking. Current Designs, manfuacturer of the Kestrel 14, lists the boat's capacity as 350 pounds.
What is the different between gG fuse and aM fuse and FF fuse and gR fuse and etc?
gG FUSES IS FAST ACTING BUT THE mA FUSES ARE TIME DELAY FUSES
Ohm's Law says Volts = Current x Resistance so R = 110/6.2 = 17.742 Ohms
Why there is two voltage rating on the same cable like 300V or 500V?
The first figure indicates the phase to neutral or ground voltage and the second is the phase to phase voltage. i.e. Vph-ph = 1.732Vph-n