Answer Posted / guna

S7-300 plc is a mid end plc rated by the Siemens, This
rating is depends on so many constraints but main
consideration on Number of I/O's & Instruction set, No.of
baud-rates, Cost per module. it works on the Simatic
manager driver software. it is available in compact and
modular types. this needs separate flash memory cards
(Removable)in cpu memory to store the data.

S7-400 is a high end plc means its capacity is larger when
compared to s7-300 in all the ways like technically and
physically. it can also work on the simatic manager. S7-400
is also called as DCS (distributed control systems) which
works on the driver software of PCS-7. its memory capacity
is above 64mb(very high).

the hardware configuration of both the plc types differs
a lot.

A 100W electric lamp is supplied from a 115V, 60HZ source. The peak instantaneous power dissipated in the lamp filament is

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what is x'mer ,isolation x'mer & yltra-isolation x'mer?????

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What is the difference b/w fanuc alpha series 16i and 18i controller. what is stand for i

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if we install two earth pits with a clear space of 5m without any interconnection,by checking the digital multimeter will it show continuity between earth pits? If so what would be the approx. value

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where reactive power is used

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Can anyone tell me some hints about what type of questions are asked by the interviewer by an Electronics engineer when company is installing an IPP and wants a team of engineers?

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what is the chiller and working principal

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I have done my m.tech in electrical engg discipline. Can any one please suggest me how should I prepare for getting into phd in iit or nit.How should I prepare for getting into lecturership

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Refernce currents are to be generated using refernce cueernts how can this be done??

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what is basic difference betmeen normal & flame proof motor??

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I am having dual speed motor of cromton greaves make of 3.7 KW -1400 rpm and 5 KW - 900 rpm. Please let me know groups and winding connction for rewinding purpose.

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I'm generating a pulse of 3V with frequency 80Hz (12.5ms time period) and pulse duration 0.125ms and feeding it to a transformer since i want the pulse to get amplified around 60V. At the output amplification s happening but the pulse is changed to a spike, can you tell me what could be the reason? (an ordinary transformer 220V-12V stepdown transformer is reverse connected ie. now it is 12V-220V stepup and voltage amplification happens)

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During Starter Panel Com missing I Found The Main Incomer 40Amp MCB 10KA Trip When Motor Change Star To Delta Motor Rating 20HP BUT When We Use Same MCB To Other Motor It Does Not trip Or What Is Necessaries for Star Delta Starter MCB SFU MPCB OR MCCB And What are The Breaking Capacity of MCCB in the Motor above 15HP

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What will happen if the armature resistance is in minimum position and the field resistance is in maximum position while starting the motor

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can anyone show me how the 3 phase power is supplied to socket outlets?

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