Page 132 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 56 : To connect and test HPMV & HPSV Lamps

Objectives

At the end of this exercise you shall be able to:
• Identify & study the construction, parts and rating of HPMV & HPSV lamps
• Identify and test the ballast, igniter, lamp holder & capacitor required for HPMV & HPSV lamps
• Connect and test the HPMV & HPSV lamps
• Measure the starting & running drawn by the lamps and check the illumination & color of light.

Requirements

Tools/Equipments/Instruments Materials/Components
• Combination Plier 165mm, • PVC copper wire 1.5 sq.mm - 2 m.
insulated - 1 No. • Test lamp 100 W, 230V - 1 No.
• Screw Driver 150mm, • HPMV Lamp 250 W, 230 V - 1 No.
insulated stem - 1 No. • HPSV Lamp 250 W, 230 V - 1 No.
• Neon Tester 75mm, 500 V - 1 No. • Ballast 250 W, 230 V - 2 Nos.
• Electrician knife Insulated - 1 No. • Igniter 230 V - 1 No.
• Ammeter MI, 10 A - 1 No. • Threaded lamp holder Goliat h
• Multi meter Digital, 3 digit - 1 No. Edison, 250 W - 2 Nos.
1/2
• Capacitor 5 µf, 400V - 2 Nos.
Procedure

TASK 1: Test the ballast,Igniter & capacitor

1 Draw the circuit diagram of HPMV lamp and HPSV lamp.
2 Check & study the construction, parts and wattage of HPMV & HPSV lamps.
3 Check the rating of ballast, igniter, lamp holder & capacitor required for HPMV & HPSV lamps.
4 Check the ballast and capacitor with test lamp before the connection of lamps.

TASK 2: Connect and test the HPMV lamp
1 Make the connections of HPMV lamp as per circuit diagram.

2 Check the connections, and connect the circuit to 1 Ph. AC supply.
2 Switch ON the supply, note down the starting current drawn by HPMV lamp.
3 Allow some time to glow the lamp with full brightness which takes about 5 minutes.
4 After lamp glows with full brightness record the running current in ammeter & observe color of light.
5 Switch OFF the supply and disconnect the circuit and lamp.

TASK 3: Connect and test the HPSV lamp

1 Make the connections of HPSV lamp with ballast & igniter as per circuit diagram.
2 Check the connections, and connect the circuit to 1 Ph. AC supply.
2 Switch ON the supply, note down the starting current drawn by HPSV lamp.
3 Allow some time to glow the lamp with full brightness which takes about 5 minutes.
4 After lamp glows with full brightness record the running current in ammeter & observe color of light.
5 Switch OFF the supply and disconnect the circuit and lamp.

115