EARTHING AUR NEUTRAL MEIN KIYA FARQ HOTA HAY

Earthing aur Neutral mein farq kiya hota hay. Ye sawal aksar interviews wagera mein pocha jata hay aur aksar loogo ko nahi pta hota in mein kiya farq hota hay.
Earthing aur Neutral mein farq.
Neutral ko ham circuit complete karnay kay liye istimal kartay hein jis se phase return jata hay jab kay earthing ham protection kay liye istimal kartey hein. System ko protect karnay kay liye.

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TWO PHASE SYSTEM KIYA HOTA HAY?

Two phase system jisay aksar two phase motor system bhi kaha jata hay. Ye aksar electrical motor mein istimal hota hay, Jesay kay two phase servo motor. Servo motor mein do windings hotein hein starting winding aur running winding. In dono Winding ko alag alag phase chahiye hota hay aur 90 degree ka difference bhi hota hay.

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ELECTRICAL SWITCHBOARD, ELECTRICAL GEAR AUR ELECTRICAL PANEL ME FARK AUR DETAILS.

Electrical Switch gear ya Electrical panel ya Electrical Switchboard in teeno ka matlab aik hi hota hay. Electrical switchboard electrical ki controlling system hota hay jis se plant ki controlling ki jati hay. Electrical distribution board chotay swich gear hotay hain jab kay swich gear panel baray hotay hein. char kisam kay switch gear hote hein. (there are 4 types of switch gear).

1. Low Voltage Switchboard
2. Medium Voltage Switchboard
3. High Voltage Switchboard
4. Super high Voltage Switchboard

• Low voltage switch gear me DBs wagera aati hein. Distribution boards hotey hein jo choti machines wagera ki controlling kay liye hotay hain.
• Medium Voltage Switchboard mein Wo switch gear hotay hein jo zyada tar Companies kay Power plant me istimaal hotay hein Companies ki controlling kay liye.
• High and Super high Voltage Switchboard Power plants and grid stations mein use hotay hein jaha high voltage hota hay.

VOLTAGE RATINGS:

Switchboard ki alag alag voltage ratings hoti hein, Jo char categories me divide hein.

• 1 Volt se lekar 1000 volts tak Low voltage me hota hay.
• 1001 volts se  35000 volts tak medium voltage me hote hein.
• 35000 volts se 220000 volts tak high Voltage Switchboard me hote hein.
• 220000 volts se ziada voltage phir Super High Voltage Switchboard me hote hein.

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THREE PHASE STANDARD MOTOR CONNECTIONS

Three phases me star delta/ induction/ Motor ky connections konsay hein aur kesey hein, Ye connections Standard hein.

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DC MOTOR KI DIRECTION KO KESE REVERSE KAR SAKTY HEIN.

DC motor ki direction ko reverse kese karsakty hein? ye b aik important topic ha jo students DC motor parh rhe hein specailly un k liye ok to sab se pehly ham bta dein k dc motor me do tarha ki windings hoti hein.

1. Field winding.
2. Armature winding.

Field winding se ham main field produced karwate hein, balky ye kehna thek rahy ga k field winding se main field produced hoti ha aur armature winding se armature field produced hoti ha.

Ab agar ham field winding se guzarnay walay current ko change/reverse karty hein (current ki direction ko change karte hein) to is se ham easily motor ki direction ko reverse kar sakty hein.

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ALTERNATOR ME ROTATING ARMATURE SYSTEM HOTA HA YA STATIONARY ARMATURE SYSTEM

Generally, Alternators me armature stationary hota ha aur field rotatory hota ha,Lekin ye fix nahi ha k aesa hi ho, q k small alternators me rotatory armature b hota ha, aur field winding stationary. Lekin large alternators me field winding stationary hoti ha jb ky armature winding stationary.

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ALTERNATOR KI GENERAL SYSTEM REQUIREMENTS KIYA HOTI HEIN?

EMF ki generation ky liye two basic systems.

1. Magnetic field system, jo magnetic field system produce kare.
2. Armature system, Jis me Conductors hotey hein aur usi me EMF produce hota ha.

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