Chapter 9 Electrical quality indicators 119
9.1.
The concept of electric energy quality
119
9.2.
Deviation of voltage and vibration
119
9.3.
Frequency fluctuation and vibration
120
9.4.
Nosymmetry and nosinusoidality of current and voltage
forms
124
9.5.
Impact of quality indicators on electrical devices
performance
124
Chapter 10 Schemes of electricity supply of industrial enterprises. external and internal schemes 132
10.1.
Description of industrial enterprises by capacity
132
10.2.
External power supply schemes
133
10.3.
Schemes of internal power supply
135
Chapter 11 Selection of transverse cutting surfaces of air and cable lines 143
11.1.
Air and cable lines
143
11.2.
Prolonged exposure to acne current. The condition of the
tok’s economic density
154
11.3.
Low-voltage cable lines on condition of voltage loss
158
Chapter 12 Relay protection and automaton power supply system 161
12.1.
Relay protection in power supply system. Main and
auxiliary relay
161
12.2.
Requirements for relay protection
164
12.3.
Аutomaton power supply system
168
Chapter 13 Automated systems of accounting and control of electric energy of power supply system 170
13.1.
Automated systems of accounting and control of electric
energy consumtion
170
13.2.
Many tariffs and functionality. One and three phase 177
