How two nos. 130 kw D.C motor get synchronise using D.C drive.

2147

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how to test the turn ratio of 3 phase transformer using volt meter shoe the curcit diagram.

2473

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For The preparation of goverment examination Which book i will prefer and by which way i will do the preparation for exam.

2158

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what is the reqirred voltage in HT motor to get full RPM on no load test?

2084

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WHAT IS DENSITY OF AIR AND PETROL MIXTURE IN 2 STROKE S.I.ENGINE

2251

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How many 1.5 ton A/Cs can run on 7.5 kw generator (diesel)?

2050

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1. A bomber drops a bomb from an aircraft flying at 2000 km/hr. at an altitude of 7km. The speed at which the bomb will strike the earth would be

1925

---

When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

2170

---

Why whenever a reciprocating compressor is switched ON or OFF it is put into unloading mode?

2098

---

what is method for testing CT

2165

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why transmission is only 3 phase and not 2 or 4 or poly phases

2157

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how open delta PT works & what is its construction?

2265

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is there any device that works properly accept relay, it may be fuse but if i want fuse of 33kv 300 amp it is avaliable, pls give me details

2008

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Why corona leads to production of Ozone and glow of the color VOILET?

1994

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what is fullform of ge 9ea gas turbine

3699

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