Page 209 - Electrician - TT (Volume 2)

ELECTRICIAN - CITS

AC drives of various brand with different ratings are available in the market. It is generally assembled in a metallic
enclosure. The front panel has the power input and output terminals, control terminals, keypad (operator interface)
for controlling the drive etc. It has provision for connecting to PC for programming the drive.
The main parts are given below and shown in Fig 4a and 4b.
1 Mounting screw holes
2 Name plate label

3 Bottom cover
4 Digital keypad
5 Upper cover
6 Ventilation hole
7 Input terminals
8 Control Input/Output terminals

9 External brake resistor terminal
10 Output terminals
11 Grounding
Power and control terminals

In AC drive, the front panel has the input power terminals viz R/L1, S/L2 and T/L3 where 3 phase AC 415V, 50Hz
supply is connected. The 3 phase induction motor is connected of output power terminals viz. U/T1, V/T2 and W/
T3.

There are control terminals viz M0, M1, M2, M3, GND, +10V, AV1 etc. for starting/stopping/ reversing and speed
control actions. Names and locations are given in Fig 5

Fig 5 Fig 6

196

CITS : Power - Electrician & Wireman - Lesson 93-100