INDUSTRIAL TRAINING AT BELA INTERNATIONAL

PRIVATE LIMITEDCOLOMBO 07

SANDARUWAN W.N.D.C (RU/E/2010/153)

Department of Electrical & Information Engineering

Faculty of Engineering

University of Ruhuna

Presentation Outline

• Introduction to training establishment

•Training experiences (Technical )

•Training experiences (Other)

•Conclusion

INTRODUCTION TO TRAINING ESTABLISHMENT

• One Company of BELA Group of Companies

• Managing Director Mr. Chanaka Benjamin

• Act as electrical sub contractors

INTRODUCTION TO TRAINING ESTABLISHMENT CONT...

• Places I worked…

Bela International (Pvt) Ltd. Head office, Colombo 07.

Bio-Mass Plant, Ninthuvr, Ampara.

• Places I visited…

Cinnamon Grand Hotel,

Hingurana Sugar Factory. Ampara.

Pyramid Lanka (Pvt) Ltd.

Training Experiences

From Bio-Mass Plant

Power flow structure of the plant

Ground Resistant test

Protection between plant and grid

Transformer cooling

Power Flow Structure of the Plant

33 kV CEB Supply CEB Metering Load Break Switch

33 kV Panel33 kV/6.6kV

TransformerRemote Control Panel

Remote Control Panel

Remote Control Panel

Remote Control Panel

6.6 kV/415V

Transformer

Transformer

Incomer

Outgoing feeder

(generator)

Outgoing feeder

(Transformer)

Generator

Ground Resistant Test

Types of protection

• Over Current Protection

• Over Voltage Protection

• Over Frequency Protection

• Under Voltage Protection

• Under Frequency Protection

• Differential Protection

• Rate of Change of Frequency Protection (ROCOF)

• Neutral Voltage Displacement Protection (NVD)

Protection between Plant and Grid

Air cooling dry type transformers

• Air Natural (A.N) transformer

• Air Forced (A.F) transformer

Oil Immersed Transformers

• Oil Natural Air Natural (O.N.A.N) transformer

• Oil Natural Air Forced (O.N.A.F) transformer

• Oil Forced Air Natural (O.F.A.N) transformer

• Oil Forced Air Forced (O.F.A.F) transformer

Oil Immersed Water Cooling Transformers

• Oil Natural Water Forced Transformer Cooling

• Oil Forced Water Forced Transformer Cooling

Transformer Types (Cooling)

From Bela Head Office

• Relays and Contactors (Application)

• Light Levels (Calculation and Design)

• Protection Index

• Power Cable Types

Training Experiences cont…

Relays

• Use for Control Circuits

• Low currents

Contactors

• Use for Power Circuits

• Handle High Currents

Relays and Contactors (Application)

My design…

Light Levels (Calculation and Design)

Parameters we need to know…

• Average luminance required (E)

• Luminance efficiency of bulb type (n)

• Wattage of one bulb (P)

• Room Dimensions ( L x W x H )

• Utility factor (UF) and Mint factor (MF) [constants]

• Room index (A) = (L X W)/{(H-0.85)X(L+W)}

• Required bulbs = (E X A)/(MF X UF X n X P)

Protection Index

Power Cable Types

Non-technical Training Experiences

• Deal with industrial people with professional

Manner.

• Familiarized with office works.

• Familiarized with site works.

• By Visiting other sites also I got new

experiences about how they are working.

Conclusion

Bela International (Pvt) Ltd is good training place

for electrical engineering undergraduates,

but these days there is lack of ongoing projects

of it.

And it tends to move to the Civil engineering

field.

However I successfully completed my second

industrial training with technical and non-

technical experiences…

THANK YOU !

Emergency Stop Push Button

T M1

X M2XX

Tank Upper Level Sensor

Well Lower Level Sensor

Tank Lower Level Sensor

On Delay Timer

On Delay Timer (T) AUX

Duty Water Pump

Spare Water Pump

M1X

M1X

M2X

M2X

Manual ON Push Button

Manual OFF Push Button

Pump Selector Switch

Mode Selector Switch

Thermal Overload

Thermal Overload

M2X

M1X

110V DC Supply

0V

Tank Upper Level Sensor

Tank Lower Level Sensor

Well Lower Level Sensor

Tank

Well

M2

M1

Duty Water Pump

Spare Water Pump

S1

S2

S3

S2

S1

S3

Control Circuit Diagram

Structure

Water Pump System with Two Water Pumps (Auto/Manual)