Answer Posted / sarfraz

An induction motor cannot run at synchronous speed because it is the "slippage" of the rotor relative to the rotaing magnetic field that generates the current in the windings contained within the rotor. This induced (hence the term induction) current sets up the opposing magnetic fields that cause the rotor to rotate.

Diagram and details of polarity test for Current Transformer 11kv 400/200/100/1A

2557

---

What is the reason of polyphase induction motor tripping suddenly on high current during running at 70% laod? Motor IR , winding resistance & inductance balance. Motor no load current is balance and ok as per mgfr. data.

1948

---

What is the permissible limit of shaft voltage for 6.6 KV motors ? Why? Is there any standard is available?

2066

---

How to design the NGR Resistance

1603

---

What are dcs and plc?

675

---

---

Differnce between negative Pahse SequenceFunction and unbalance Function?

1287

---

What does ampere turns shows?

657

---

Battery is a voltage source? give one example of current source and why?

1084

---

in HT service 3ph 4 wire service Y-phase voltage shows zero . whether it is meter fault? or what be the reason ? if y-ph voltage zero ,can current is recorded? reasons for failure?

1405

---

how to calculate differential current when we testing differential relay..suppose we have 1000kw generator,630amp VCB,what value we should put /inject so that relay trip the VCB? PLLZ justify ur comment

1160

---

what is arc flash and what are the hazards involved

1663

---

What was your role in the silicon evaluation/product ramp? What tools did you use?

1561

---

if i am in front of transmission line how to know that current direction without any equipment

1248

---

Why AC & DC capacitor are use in UPS ??????????????????

1583

---

11 kV line deraction check by an Engineer.

1515

---