A MAIN PROJECT ONPROTO TYPE NEUTRAL GROUNDING SYSTEM

PRESENTED BY :

S.SUPRIYA (12C51A0237) V.RAMESH (12C51A0242) V.SANDEEP (12C51A0241) M.VAMSI KRISHNA (12C51A0230)

PROJECT GUIDE

Mr.K.R.K.PRASAD M.Tech(PE)

PROJECT INCHARGE HEAD OF THE DEPT Mr.V.ASHOK Mr.K.R.K.PRASAD M.Tech(PE&ED) M.Tech(PE)

SAI SPURTHI INSTITUTE OF TECHNOLOGY (AN ISO 9001:2011 CERTIFIED INSTITUTION&ACCREDITED BY NAAC-UGC) B.GANGARAM, SATHUPALLY-507303, KHAMMAM (Dist.).T.S. Department of Electrical and Electronics Engineering

ABSTRACT

• The main aim of the neutral grounding is Protection,

Safety of the power system. grounding is to provide a

low impedance path for current to drain into the

ground at the point of fault with the least clearing

time.

• We are implementing proto type neutral grounding

system and also exhibit the characteristics of the

ungrounded and grounded system.

CIRCUIT DIAGRAM

COMPONENTS

• Single phase supply

• Single phase transformers

• Mess

• Wires

• Bulbs

• Wire Clips

COMPONENT DESCRIPTION

• Single phase supply: Here we use 230v ac supply.

• Single phase transformers : we using 230v/12v 3 step

down transformers connected to the load.

• Bulbs:12v/20w bulbs are used as loads the bulbs are

connected across each phase to the neutral.

• Wire clips: when the fault is created the crocodile clips are

used to make grounding.

CIRCUIT OPERATION

• We given single phase AC 230v supply to the three

single phase transformers which are step down to 12v.

• When transformer neutral is connected to the ground.

• When we are given single phase to ground fault at any

phase load voltage across that phase will be zero .

• Reaming healthy phases voltage will be remains

constant. So loads connected to the phases will be safe.

PROJECT REPORT• Half of the project was completed.• Ungrounded and grounding systems are completed.

ADVANTAGES • Voltage of healthy phases do not exceed line to

ground voltages i.e, they remain nearly constant.• Detecting the location of fault is easy.• Safety of personal is more.• High voltage due to transient line to ground faults are

eliminated.• It provides improved service reliability.

CONNECTION DIAGRAM