Direction: In an EDM process using RC relaxation circuit, a 12 mm diameter, through hole is made in a steel plate of 50 mm thickness using a graphite tool and kerosene as dielectric. Assume discharge time to be negligible. Machining is carried out under the following conditions.
Resistance = 40 ohms
Capacitance = 20 μF
Supply voltage = 220 V
Discharge voltage = 110 V
-
Average power input (in kW) is
-
- 0.373
- 0.137
- 0.218
- 0.5
Correct Option: C
Total Energy consumed
E= 1/2 CV2 =0.121 J/cycle.
Average Power,
| P = | 0.55 × 10-3 |
= 220 W = 0.22 kW.
