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What is solkor r?
solkor r is a form of unit (cable, switch, transformer etc) protection for high voltage systems and works by sensing a voltage inbalance between either end of the unit (using current transformers and summation transformers) by doing this it will sense a fault in its own unit and isolate the fault, it will not however sense a fault flowing through it from another unit and therefore maintaining a supply. especially useful in ring systems.
Briefly define the monoalpabetic cipher?
A monoalphabetic cipher uses fixed substitution over the entire message, whereas a polyalphabetic cipher uses a number of substitutions at different positions in the message, where a unit from the plaintext is mapped to one of several possibilities in the ciphertext and vice versa.
How to calculate fault current for transformer?
The fault current of a power transformer will depend on the following; Transformer Rating (in KVA/MVA) per unit impedence of the transformer (%p.u.) line/phase Voltage (VL/VP) the following formula can be used to find the fault current on the secondary side of a transformer Fault Current = Transformer Rating /(per unit impedance x phase voltage) The Values of Transformer Rating, per unit impedance & phase/line voltage will usually be mentioned on the transformer rating plate / data sheet As an example a 500kVA, 11kV/400V/3-Phase/50Hz transformer with 5% p.u impendence will have the following fault levels on the secondary side Fault level = 500/(5%)=10000kVA S=1.732 * VPP * IP Fault current = 500/(5% x 400 x 1.732) = 14.4 kA Remember to use 3phase voltage!
How do you calculate cable distance using farads?
All underground cables have relatively high values of capacitance, due to the close proximity of their cores and earthed (grounded) metallic sheath. Manufacturers provide data for their cables, which express their capacitance in terms of capacitance per unit length, e.g. microfarads per metre.Certain categories of underground cable-fault can be located by measuring the capacitance (using an appropriate bridge circuit) of the healthy section of the cable then, having determined the capacitance per unit length for that type of cable, measuring-off the distance along the cable route to the fault position.
Relation between kva and fault level?
There isn't enough information here. Available short circuit fault level can be given as a KVA value for different types of faults, but I assume the questioner is looking for a relationshiop between (transformer?) KVA and available short circuit current - If my assumption is correct, there is no direct correlation without knowing the transformer positive and zero sequence impedances. If these are known, you can assume the source impedance is infinite, and calculate the maximum short circuit current through the transformer as follows: lowside fault current for a 3 phase fault on the lowside of the transformer: lowside kV (line to line) / (1.732 x per unit positive sequence impedance x scalar to real impedance), where scalar to real impedance is equivalent to lowside kV (line to line) ^2 / base kVA. For a L-G fault, do the same with zero sequence impedance.
What is unit substitution in fault finding?
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What is unit substitution?
Unit Substitution : Remove suspect part and fit ‘known working’ spare.
Describe the various fault location techniques that can be used and how they are applied such as half split input to out put function testing unit substitution and equipment self diagnostics?
with a good haircut
What is the unit for finding a circumference?
The unit for a circumference is the same as the unit for length (or radius or diameter).
The dip of a unit represents what?
The dip of a unit represents the angle at which the bed inclines from the horizontal. In dip-slip faults, the fault blocks move up and down, parallel to the dip of the fault plane.
Which of the testing technique immediately follows the unit testing?
module testing
What is general technique that you use for debugging a pl sql unit?
dbms_out
What is the unit of measurement for finding the capacity?
mL and L
Which of the testing technique immediatle follow the unit testing?
sub system testing
What is the basic metric unit for finding mass called?
kilogram
What is solkor r?
solkor r is a form of unit (cable, switch, transformer etc) protection for high voltage systems and works by sensing a voltage inbalance between either end of the unit (using current transformers and summation transformers) by doing this it will sense a fault in its own unit and isolate the fault, it will not however sense a fault flowing through it from another unit and therefore maintaining a supply. especially useful in ring systems.
What object can you use measuring calculus?
Calculus is a mathematical technique: it is not a unit or tool for measurement.
