1 (a) If the ionic content in a transformer oil is very high and the oil has higher density, how can you increase the electroconvection coefficient M of this oil? Consider all parameters that determine the value of M (Note that applied voltage is not a parameter of an oil). M = : the symbols have their usual meanings. Note: No numerical substitutions but just implied larger or smaller value for the parameters.

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1 (a) If the ionic content in a transformer oil is very high and the oil has higher density, how can
you increase the electroconvection coefficient M of this oil? Consider all parameters that determine
the value of M (Note that applied voltage is not a parameter of an oil).
M =
the symbols have their usual meanings.
Note: No numerical substitutions but just implied larger or smaller value for the parameters.
(b) Show that if u and M both are reduced for a transformer oil, the ratio
d
is reduced for constant
Comment whether
you
will choose thin or thick insulation thickness and higher or lower Vb.
Note that Vb is related to insulation thickness for a uniform field E.
(c) For a liquid transformer oil system, the oil has relative dielectric constant ɛ = 3.45, density p =
2.39 g/cm and ionic mobility u = 3.25 x105 cm?/V-s. If the applied voltage is 660 V and the oil
container's top to bottom plate distance d = 2.25 cm, find the electro convection coefficient M.
Transcribed Image Text:1 (a) If the ionic content in a transformer oil is very high and the oil has higher density, how can you increase the electroconvection coefficient M of this oil? Consider all parameters that determine the value of M (Note that applied voltage is not a parameter of an oil). M = the symbols have their usual meanings. Note: No numerical substitutions but just implied larger or smaller value for the parameters. (b) Show that if u and M both are reduced for a transformer oil, the ratio d is reduced for constant Comment whether you will choose thin or thick insulation thickness and higher or lower Vb. Note that Vb is related to insulation thickness for a uniform field E. (c) For a liquid transformer oil system, the oil has relative dielectric constant ɛ = 3.45, density p = 2.39 g/cm and ionic mobility u = 3.25 x105 cm?/V-s. If the applied voltage is 660 V and the oil container's top to bottom plate distance d = 2.25 cm, find the electro convection coefficient M.
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