4. With respect to the operating current circuit, as
- a. Primary;
- b. Secondary.
5. With respect to the abnormal conditions which caused them to operate, as
- a. Overload;
- b. Underload;
- c. Over voltage;
- d. Low voltage;
- e. Reverse energy;
- f. Reverse phase.
6. With respect to the time consumed in performing their function, as
- a. Instantaneous (so called);
- b. Definite time limit;
- c. Inverse time limit.
7. With respect to the character of its action, as
- a. Selective;
- b. Differential.
8. With respect to whether it acts directly or indirectly on the circuit breaker, as