Answer / sekhar guttula

DNY11

how to select electronic timer(Star-Delta) setting for diff. rating motors

0 Answers   Getrag Ford Transmissions,

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WHY IN AC DRIVES,INPUT PHASE CURRENT SHOW UNBALANCE?

0 Answers   Adhunik,

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i need circuit star delta connection?

1 Answers   L&T,

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what is ten delta test? what is the significanse of it

1 Answers  

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why is the transmission voltage is multiple of 11?

4 Answers  

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I am having a 1500 KVA transformer whose secondary current is 2086A and my connected load is 1000 KVA, I am having 400 KVAR APFCR for PF improvement what ratio of CT should i install in LT EB Bus to get optimum PF improvement?

0 Answers  

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how many poles we use in high power generation

1 Answers  

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what is 11kv cable

1 Answers   bscpl,

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i have faced a problem in ro plant grunfos make bm30type pump it is 22kw pump. We start this pump using siemens 3rw 4423-ibc44, 30kw softstarter but this soft starter will frequently failier so we planed to change dol starter. So pls tell anybudy its possible or not.

0 Answers  

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Why is it that polarization index type test is required for MV and HV motors and not for LV motors?

3 Answers   La-Gajjar Machineries, Qatar Airlines,

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why the transformer is not operates on two phase?

1 Answers   APGenco, Atkins, FFBL,

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My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

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