2. Current or pressure limiting devices;
- a. Fuses;
- b. Reactances;
- c. Circuit breakers;
- d. Relays.
3. Lightning protection devices;
- a. Air gap arresters;
- b. Multi-gap arresters;
- c. Horn gap arresters;
- d. Electrolytic arresters;
- e. Vacuum tube arresters;
- f. Choke coils;
- g. "Static" interrupters.
4. Regulating devices;
- a. Induction voltage regulators;
- b. Variable ratio transformer regulators { drum type;
- { dial type;
- c. Compensation shunts;
- d. Pole type regulators;
- e. Small feeder voltage regulators;
- f. Automatic voltage regulators;
- g. Line drop compensators;
- h. Starting compensators;
- i. Star delta switches.
5. Power factor regulating devices;
- a. Condensers;
- b. Synchronous condensers.
6. Indicating devices;