What is voltage range factor k?

The K-factor is the ratio of the rated maximum voltage to the lowest operating voltage for which the inverse relationship between the operating voltage and the interrupting current holds true. The K-factor is a limit for derating the interrupting current for a varying operating voltage.

How do you determine the voltage of a circuit breaker?

To test the voltage of your single pole circuit breaker, you need to put your black or common lead to the ground of your breaker panel. After that, put your red lead in the hot wire of the circuit breaker you want to test. The reading should be around 120-volts for a single-pole breaker.

What is the main factor to determine circuit breaker rating?

The overall voltage rating is calculated by the highest voltage that can be applied across all end ports, the distribution type and how the circuit breaker is directly integrated into the system. It is important to select a circuit breaker with enough voltage capacity to meet the end application.

What is K rating of breaker?

The K factor is a dimensionless number which defines the range of voltage over which the interrupting current increases. The rated maximum voltage divided by the K factor, or V/K, gives a voltage below which no increase in interrupting current is required.

How is MCB rating calculated?

Size of MCB for Branch Circuit-2:

  1. Load Current of Computer = (No X Watt X Demand Factor)/Volt =(2X200X0.
  2. Branch Circuit-2 Current as per NEC = Non Continues Load+125% Continues Load.
  3. Branch Circuit-2 Current as per NEC =(1.04)+125%(0) =1.04Amp.
  4. Type of Load=Lighting Type.
  5. Class of MCB=B Class.
  6. Size of MCB=6 Amp.

What is kA in breaker?

kA rating of an MCB or an MCCB is the maximum current it can safely interrupt in case of a short circuit. If the current goes beyond this value, the circuit breaker could be damaged. kA rating is known as the short circuit withstand capacity or ultimate breaking capacity of a circuit breaker.

What does 10KA mean on a breaker?

“10KA” means 10,000 amps. Is is an extreme conditions rating for the breaker. It means that if your range suddenly has a massive problem, and causes a dead short, causing thousands of amps to flow, the breaker is certified to be able to interrupt it if it’s less than 10,000 Amps.