Page 257 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 98 : Test and service protective devices,

control panel etc

Objectives

At the end of this exercise you shall be able to
• list the control panel components
• test the control panel components.

Requirements

Tools/Instruments Materials
• Trainees kit - 1 Set • Push button red /green - 1 each
• Scriber 100 mm - 1 No. • Indicator lamp with holder - 1 each
• Hacksaw frame with blade- 300 mm - 1 No. (red, yellow, blue)
• Hand drilling machine 6mm capacity - 1 No. • MCB 4 Pole 16A , 415V - 1 No.
• Race ways
- 1 m
• HSS Drill bit 6mm & 4mm - 1 No.each • DIN rail - 1 m
• Round nose plier 150 mm - 1 No. • G - channel - 2 m
• Crimping tool 200 mm - 1 No. • Wire clips - as reqd.
Instruments/Equipments • Terminal connectors - as reqd.
• Wire ferrule
- as reqd.
• Digital multimeter - 1 No. • Grommets - as reqd.
• Megger 500V - 1 No. • Lug/thimble - as reqd.
• Contactor 4 pole, 16A,240V - 1 No. • Cable binding straps and buttons - 10 m
• Thermal overload relay 10A, 415V - 1 No. • Nylon cable ties - 15 Nos.
• Remote station - 1 No. • PVC 1.5 sq mm copper cable 660V - as reqd.
• Over load relay 15A, 415V - 1 No. (red, black, yellow, blue, green)
• Assorted size bolt & nut - as reqd.

Procedure

TASK 1:
1 Note the specification of various panel board accessories (refer Table 1 for guidance)
2 Identify the power circuit accessories

3 Identify the control circuit accessories
4 Identify the indicating circuit accessories.
Table 1

Sl No. ITEMS SPECIFICATION
1 MCB 1P,2P,3P,4POLE
2 Push button Red, green

3 Push button element NO & NC type
4 Selector switch Maintained type, Momentary (2 position, 3 position)
5 Indicator lamp LED type & filament lamp type (Green, red, yellow, blue,
amber)
6 Slotted wire duct 50 mm X 35 mm

7 Din rail (Making material cold 35 mm
rolled carbon steel with zinc plated
8 Cable Tie 80 mm,100mm,150mm,200mm etc

240