Answer / raghavendran r

Stalling is a condition when the motor stops rotating.This
condition occurs when the load torque is greater than the
motor shaft torque ie break down torque condition.In this
condition the motor draws maximum current but the motor do
not rotate.The current is called as Stalling current.

Answer / ali hassan mirza

Stalling of the motor refers to a condition, where the motor is unable to rotate. This condition can be caused either due to any obstruction in the load or due to any problem with the motor such as bearing seizure, etc.

This condition is also known as locked rotor.


When the speed of the rotor decreases to a very low value or stops completely due to stalling, the slip of the induction motor increases. This causes higher voltage and consequently higher current to be induced in the rotor windings.

The stator currents also increase. The equivalent of the motor stalled condition is that of a transformer whose secondary is short circuited.

The high current drawn will cause damage to the windings and cause the rotor to heat up.

Stall protection devices work by monitoring the motor current and the speed. If the motor draws higher current at a preset low speed, the relay is activated

do anyone out there know where to find a compleete list on acronyms/abbreviations used in offshore electric engineering. MCB - Micro Circuit Breaker, MCCB-Mouldes Case Circuit Breaker, ELCB-Earth Lekage Circuit Breaker, ELMCB- etc.....

0 Answers   Aibel,

---

what is ignition?

1 Answers  

---

When both contractor star & delta is hold in star delta motor ?? So what happen in this case ??

1 Answers  

---

What is the correct procedure to shutdown VCB in 11kv substation.safety and work procedure

3 Answers   EGA,

---

What is surger vector in 33Kv transmission feeder? We have AC power generator of 8MW which is paralleled with 33Kv EB grid. Some times our HT breaker gets trip off due to surge vector problem. How to over come it? Is there any device to observe the surge and avoid tripping?

3 Answers  

---

What is the kiosk parts, about them and their functions ? If anybody have some PDFs files or details about this plz send it on tawhidfaisal@Yahoo.com

0 Answers  

---

what is power factor ?

12 Answers   KSEB,

---

What are the insulation standerds for eg H clase and how many insulation standerds are there and its standerds??????

0 Answers  

---

WHICH TYPE OF TRANSFORMER IS USED IN POWER TRANSMISSION BASED ON TRANSFORMER CONNECTION ON PRIMARY AND SECONDARY SIDE

3 Answers  

---

Why is it not possible to operate a star-delta transformer in parallel with delta-delta transformer?

1 Answers  

---

what is slip resistance? how much its value in 110 kw motor? why voltage is varied in vvvf drive ?

1 Answers   Reliance,

---

What are the main factors to be considered(In terms of energy conservation) while selecting a new air compressor?

1 Answers  

---