Answer / rahul

depends on type of d motor..i.e. it's construction.
A PMDC motor will not run on AC.
A shunt wound motor will not run on AC. There will b heavy
heating that may cause damage.
A series motor functions as Universal Motor and hence will
run satisfactorily on AC.

Answer / f1_match

k but in this case, what will happen to the motor
windings? how about the protection system whether it will
act during this condition?

Answer / rahul

luk...of course the performance is gonna b inferior as u may
know the differences b/w universal motor and dc
motor...Eb(back emf) will b less for ac..so less o/p power

Answer / velpula.nagarjuna

in dc motor when we give ac supply to the armature then the motor is not run. because the direct flux produce from the permanent magnets, but from the armature winding the alternating flux is produced.that means the flux is rotated continuously.the the polarity of the armature flux continuously changes... the the aiding of the flux is not possible..with out aiding of the flux no torque will be produce..no torque means no rotations...that means the hunting will be processed........

Buchholz relay is used ………. a) protection T/F b) oil T/F c) Air core T/F

8 Answers   Engineers India Limited,

---

what is PI value and its significance for insulation testing?

3 Answers  

---

ABOUT AC GENARETORS AND MAINTANANCE AND TYPES OF GENARETORS

1 Answers  

---

How dc generators direction can be reversed ??

2 Answers   GPSC Gujarat Public Service Commission,

---

Can we inject more current in ct primary paralleling 2 loading transformers/Injection kit at a time?let ct ratio be (5000/1A)(per kit rating 2000A range),i need to inject 5000A,if this cant b done means wat is d optional?

1 Answers  

---

---

If we are importing real power & exporting reactive power then what will be the effect on our system

3 Answers  

---

which cable is preferred PVC OR XLPE for voltage from 220V to 11 KV with proper justification

1 Answers   BARC, Sail,

---

During the main stator winding insulation testing (phase to ground)of 11kv alternator (Lerysomer) i found 0 and resistance with multimeter and found 20 killo ohm while the power cables are connected both end (Generator & VCB). In VCB PT (Potential transformer) are connected. Please any body explain that method of insulation is correct or not? also describe of PT connections

1 Answers   Private,

---

what is the job description of a LOW CURRENT ELECTRCIAL ENGINEER in a industry?

1 Answers   BTAT, Powercraft, Prince Glass, Sterling,

---

I want to know in body earthing which material can be use either copper plate or GI plate please guide us which is best option.

3 Answers  

---

why dc series motor high speed motor

3 Answers  

---

sir what is the purpose of SF6 in HT breaker and what is the pressure should be maintain in the breaker?

2 Answers   Kirloskar,

---