Answer / anas feroz

Rotor emf is induced at slip frequency.
Rated slip ranges from 2% to 5% in normal induction motor's and can be as low as
0.5% in heavy induction motors to reduce the losses.
Hence rotor emf frequency will be s*Fs where
Fs= stator frequency.

what is power system.........?

1 Answers  

---

Can anyone please give me the parameters , formula needed to calculate the circuit breakers for building services.Thanks

0 Answers   Bhel,

---

Pl. give me checklist for installation & commissioning of machine tool.

0 Answers  

---

How size of Earth Strip is determined for a particular Fault current.

1 Answers  

---

how to crack cgpsc,which type of knowledge it is required,where i can get systematic study material and some tips?

1 Answers  

---

How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f normally used in Canada is to be operated in Europe on 50 hz frequency then how will its KVA rating change? a-increase b-decrease c-remains same

1 Answers  

---

details of oil cell size of Breakdown voltage test of tranformer oil details as per Standardswith mushroom electrodes?

0 Answers  

---

define differential current and restraining current in relays. how to calculate it by mathematically? post the formulaes.

4 Answers   Siemens, VPEC,

---

In some countries it is found that an Earthing Transformer is connected at the LV sides of the Transmission and Distribution Substation Transformers.Actually what is the purpose the Earthing Transformer?

1 Answers  

---

What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?

0 Answers   Jindal Steel and Power,

---

IN OLTC we observed "OUT OF STEP" Alarm, we have two different transformer, when both are in parallel this type of alarm observed. what's the meaning of this alarm and why it occurs???

3 Answers  

---

There is 15 KVA UPS using for single phase load.And 30 batteries of 12 V, 100 Ah are connected in series. Load is taking 15 A current.What will be the back up power for this UPS on same load?

1 Answers   BS, Dynamic Software,

---