Correct Answer - Option 4 : All of the above
Ratings of Circuit Breaker:
Rated Maximum Voltage: The highest RMS phase-to-phase voltage for which the circuit breaker is designed.
Rated Power Frequency: The frequency at which the circuit breaker is designed to operate.
Rated Dry Withstand Voltage: The RMS voltage that the circuit breaker in new condition is capable of withstanding for 1 minute under specified conditions.
Rated Wet Withstand Voltage: The RMS voltage that an outdoor circuit breaker or external components in new condition are capable of withstanding for 10s.
Rated Continuous Current: The current in RMS symmetrical amperes that the circuit breaker is designed to carry continuously.
Rated Interrupting Time: The maximum permissible interval between the energizing of the trip circuit at rated control voltage and the interruption of the current in the main circuit in all poles.
Rated Short Circuit Current (Required Symmetrical Interrupting Capability): The value of the symmetrical component of the short-circuit current in RMS amperes at the instant of arcing contact separation that the circuit breaker shall be required to interrupt at a specified operating voltage, on the standard operating duty cycle, and with a DC component of less than 20% of the current value of the symmetrical component.
Required Asymmetrical Interrupting Capability: The value of the total RMS short-circuit current at the instant of arcing contact separation that the circuit breaker shall be required to interrupt at a specified operating voltage and on the standard operating duty cycle.
Rated closing and latching capability: The circuit breaker shall be capable of closing and latching any power frequency making current whose maximum peak is equal to or less than 2.6 (for 60 Hz power frequency; 2.5 for 50 Hz power frequency) times the rated short-circuit current.
Rated Short-Time Current: The maximum short-circuit current that the circuit breaker can carry without tripping for a specified period of time.
Maximum Permissible Tripping Delay: The maximum delay time for protective relaying to trip the circuit breaker during short-circuit conditions, based upon the rated short-time current and short-time current-carrying time period.
