From an electrical point of view, Pe is the effective power, Pn is the rated power, Ie is the peak current
Pe=20kw in the circuit diagram means that the effective power in the circuit is 20kw.
Calculation of alternating current (AC): (three-phase)
Power=(Root 3*Current*Voltage*Power Factor)
Power Factor and Efficiency is not given. can take 0.75,efficiency can take 85%.
Expanded information:
There is also an explanation of pe is a ground wire, the role of the following:
One of the application of PE wire
PE wire is Specifically for the exposed conductive part of the electrical device grounding conductor, as for the direct connection to the power point is not connected to the work of the grounding pole (TT) or through the power supply neutral grounding (TN) does not matter, both are called PE wire.
Two, the role of PE wire
Equipment metal casing connected to the earth, when the equipment exhaust shell charged or leakage, charged or leakage body and the earth to form a short-circuit, short-circuit current so that the circuit breaker or fuse instantaneous melting or disconnection, play a role in the protection of life and equipment safety.
References:
Baidu Encyclopedia - Circuit Diagrams