Controlled switching of a circuit breaker

A system for controlled switching of a circuit breaker, the system being configured to perform a controlled switching of a circuit breaker, the controlled switching comprising:

• a calculation of a value of an initiation time function based on a first parameter value of a first parameter and a second parameter value of a second parameter, the initiation time function expressible as:
• f(p1,p2)
• where f is the function, p1 is the first parameter and p2 is the second parameter,
• the initiation time function comprising a sum of a command instant and a command delay time, the initiation time function being dependent on the first parameter and the second parameter, and a partial derivative function of the initiation time function with respect to the first parameter being dependent on the second parameter, the partial derivative function of the initiation time function expressible as
• g(p1,p2)=∂/∂p1·f
• where g is the partial derivative function;
• a derivation of an initiation instant based on the calculated value;
• a derivation of the command instant based on the initiation instant and the initiation time function;
• and
• an initiation of a command at the command instant to initiate operation of the circuit breaker at the initiation instant.

A circuit breaker comprising:

• a first terminal, a second terminal, at least one movable contact;
• a system for controlled switching of a circuit breaker, the system being configured to perform a controlled switching of the circuit breaker including:
• calculating a value of an initiation time function based on a first parameter value of a first parameter and a second parameter value of a second parameter, the initiation time function comprising a sum of a command instant and a command delay time, the initiation time function being dependent on the first parameter and the second parameter, and a partial derivative of the initiation time function with respect to the first parameter being dependent on the second parameter;
• deriving an initiation instant based on the calculated value;
• deriving the command instant based on the initiation instant and the initiation time function;
• and
• initiating a command at the command instant to initiate operation of the circuit breaker at the initiation instant.