lab report 2.doc

7/27/2019 Lab report 2.doc

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ET 603

ELECTRICAL MAINTENANCE & REPAIR

TITLE : THREE PHASE DISTRIBUTION BOARD

OUTCOMES :

Demonstrate a three phase distribution board installation which follow the MS IEC 60634 and

electricity regulation 1994.

Demonstrate the specification a three phase small switch board which follow the MS IEC

60634 and electricity regulation 1994.

Conduct maintenance and fault detection of the distribution board.

EQUIPMENT :

Distribution board box

MCCB (40A/60A)

RCCB (63A/100mA)

RCCB (40A/30mA)

MCB (6A)

MCB (20A)

Tool box

Multimeter

Mega meter

Cables (red,yellow,blue,black,green)

PROCEDURES :

i. Firstly, draw a single line diagram to understand how to install hardware into a distribution

board.

ii. After complete a single line diagram, before install hardware into distribution board, must

know the condition device before install in the distribution board and which follow a single

line diagram.

iii. Check cables connection after install hardware.

iv. After check cables connection, check installation device with using continuity test.

v. Get a result after using continuity test.


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ET 603


EXERCISE 2

Identifying the data labels at the protection device in the distribution board.

Protection Device

Types

Brand Voltage Rating Nominal Current Operating Current

Moulded Case

Circuit Breaker

EPS 415 VOLT 25kA 63A

Residual Current

Circuit Breaker

TAIAN-JAYA 415 VOLT 63A 30mA

Miniature Circuit

Breaker

EPS 415 VOLT 6A 20A

6A

EXERCISE 4

Conduct maintenance and fault detection of the distribution board.

Testing Measurement Equipment Remarks

Continuity Test Multimeter

Insulation Resistance Test Multimeter


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ET 603


DISCUSSION

A. Explain the meaning of data labelled at the protection device casing in the distribution

board.

a) MCCB

-The standard range of Moulded Case Circuit Breakers (MCCBs) are designed for

circuit protection of low voltage distribution system. They are suitable for application

as main breakers and for protection of branch and feeder circuit & connected

equipments / load. These MCCBs provide overload and short circuit protection for all circuit

elements. They are designed for use in Switchboards, Control Panels, Combination Starters,

in separate enclosures and meet the requirements of lighting, distribution and power circuits.

b) RCCB

-The Fault current overloads and short circuits can be detected by circuit breakers like MCBs

,MCCBs & HRC Fuses etc. But, Circuit breakers dont detect leakage currents, which are

dangerous for humans and livestock and if not detected can lead to fire hazards.

c) MCB

-It automatically switches off the electrical circuit during abnormal condition of the network

means in over load condition as well as faulty condition. The fuse does not sense

but Miniature Circuit Breaker does it in more reliable way. MCB is much more sensitive to

over current than fuse.

B. State THREE MS IEC 60364 or electricity regulation 1994 which

related to the three phase distribution.- Supply voltage single phase 230V AC nominal, range +10%, -6%;- Supply voltage 400V AC nominal three-phase, the range of +10%, -6%;

- The permitted frequency is 50Hz 1% and

-The type of earthing system (TT system)


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ET 603


CONCLUSION

- In this lab for Three Phase Distribution Board we able to demonstrate a

three phase distribution board installation which follow the MS IEC 60364

and electricity regulation 1994.After that,we also know how to determinethe specification on three phase small switch board which follow the MS

IEC 60364 and electricity regulation 1994.Lastly,know to conduct

maintenance and fault detection of the distribution board.

lab report 2.doc

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