Application 3 Electric installation of a kitchen
The electric installation of a kitchen, represented in Document below, is fed by a
voltage U = 220 V. This installation contains the following electric devices:
A lamp
Lamp
(220 V.05 A)
Refrigerator
(220 V 55A)
A refrigerator,
A washing machine.
1) All the electric devices
function normally. Justify.
Voltage of
the mains
Washing machunc
(220V 45 A)
2) All the devices are functioning
Circuit
normally at the same time.
breaker
K
Specify, among the circuit
breakers marked 10 A, 15 A and
30 A, the one that is the most convenient to protect this installation.
3) At the end of 24 hours, the refrigerator, of power 990 W. consumes an electric energy
of 9.9 kWh. Specify whether the compressor of this refrigerator is working permanently.​