What is the full form of 'HV' ? -How To ?

What is the full form of 'HV' ? -How To ?
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The full form of 'HV' is High Voltage
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A 400/200 volts transformer has pu impedance of 0.05. The HV side voltage required to circulate full load...

Description : A 400/200 volts transformer has pu impedance of 0.05. The HV side voltage required to circulate full load current during short circuit test is

Last Answer : A 400/200 volts transformer has pu impedance of 0.05. The HV side voltage required to circulate full load current during short circuit test is 20 V

I hv 300 oman baisa where cn I change it plzz?

Description : I hv 300 oman baisa where cn I change it plzz?

Last Answer : Western Asia

In the following reaction: `ZnS+O_(2)overset(Delta)rarrA+ZnO` `4HCl+O_(2)overset(CuCl_(2))rarrB+2H_(2)O` `A+B overset(hv)rarrC` Then A, B and C are:

Description : In the following reaction: `ZnS+O_(2)overset(Delta)rarrA+ZnO` `4HCl+O_(2)overset(CuCl_(2))rarrB+2H_(2)O` `A+B overset(hv)rarrC` Then A, B and C are:

Last Answer : In the following reaction: `ZnS+O_(2)overset(Delta)rarrA+ZnO` `4HCl+O_(2)overset(CuCl_(2))rarrB+2H_(2)O` ` ... SOCl_(2)` D. `SO_(3),HClO_(3),HClO_(4)`

Booster transformer should never: a) Have fuse in the HV winding b) Be left open circuited c) Be left closed circuited d) None of the above

Description : Booster transformer should never: a) Have fuse in the HV winding b) Be left open circuited c) Be left closed circuited d) None of the above

Last Answer : Ans: B

De Broglie equation is (a) h/mv = 1 (b) E1 – E2 = hv (c) C = 1v (d) n1 = 2d sin q

Description : De Broglie equation is (a) h/mv = 1 (b) E1 – E2 = hv (c) C = 1v (d) n1 = 2d sin q

Last Answer : Ans:(a)

The de Broglie equation is (a) h/mv = 1 (b) hv = E2 - E1 (c) n 1 = 2d sin (d) c = hv

Description : The de Broglie equation is (a) h/mv = 1 (b) hv = E2 - E1 (c) n 1 = 2d sin (d) c = hv

Last Answer : Ans:(a)

Why the tapings are placed on HV side?

Description : Why the tapings are placed on HV side?

Last Answer : 1.A fine voltage regulation is possible with hV side as it has large number of turns. 2.LV side carries large current 3. HV side is placed outside so its feasible 4. In case of step ... large no. of turns the flux and flux density decreases. Hence core losses decreases results in higher efficiency.

Why SC test is generally performed on HV side of a transformer?

Description : Why SC test is generally performed on HV side of a transformer?

Last Answer : The rated current is less on HV side. This will also permit to use ammeter and wattmeter of lower current range.

Mention the various tests carried out in a circuit breaker at HV labs.

Description : Mention the various tests carried out in a circuit breaker at HV labs.

Last Answer : Short circuit tests, Synthetic tests& direct tests.

Why the tap changers are always connected to HV side of the transformer?

Description : Why the tap changers are always connected to HV side of the transformer? 

Last Answer : During tap changing action the load current has to be shifted from one tap to another tap. In case HV wining the load current will be less. Hence lesser arcing will take place. 

Why in transformer the LV CB also be tripped along with HV CB for a primary side fault?

Description : Why in transformer the LV CB also be tripped along with HV CB for a primary side fault?

Last Answer : Auxiliary transformer 415v delta star transformer, if HV CB alone tripped then back feeding from LV side (say DG runs parallel with transformer)—arcing voltage at the fault on primary—fault fed for more time – more damage.  

Why REF is now is used for HV side also in GT/SUT?

Description : Why REF is now is used for HV side also in GT/SUT?

Last Answer : The E/F setting of differential is poor.  

What is the purpose of HV / leakage current test on stator?

Description : What is the purpose of HV / leakage current test on stator?  

Last Answer : This is to find out weakness in the stator winding. If the ambient conditions are right, and the insulation is weak, the leakage current will increase non-linearly.  The record of voltage ... current. In HV test starting leakage current should be more than switching off current in μ Amps. 

What is the DC HV test voltage range?

Description : What is the DC HV test voltage range?

Last Answer : 1.7* 1.5* rated voltage.

The unity of Planck's constant 'h' in the equation, E = hv is (A) J/s (B) J.S (C) J/kmol (D) kmol/J

Description : The unity of Planck's constant 'h' in the equation, E = hv is (A) J/s (B) J.S (C) J/kmol (D) kmol/J

Last Answer : (B) J.S

The probability of a photon ionizing an atom or molecule is maximum when (hv-eVi) is as small as:

Description : The probability of a photon ionizing an atom or molecule is maximum when (hv-eVi) is as small as: a. 0.5 b. 1.5 c. 3.5 d. 10 

Last Answer : The probability of a photon ionizing an atom or molecule is maximum when (hv-eVi) is as small as: a. 0.5 b. 1.5 c. 3.5 d. 10 

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Description : What is the full form of 'WEF' ? -How To ?

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Description : What is the full form of 'VDU' ? -How To ?

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What is the full form of 'VDT' ? -How To ?

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What is the full form of 'VAT' ? -How To ?

Description : What is the full form of 'VAT' ? -How To ?

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