Molded Case Circuit Breakers (MCCB)
Figure 1: Tree Structure of MCCB Breaker
Style: A style is a group of MCCB breakers with the same brand, model, interrupting rating, similar trip characteristics, and similar frame size.
Frame Description: A Frame Description is a unique name that represents a unique set of trip characteristics data. If the same set of data applies to several Trip Amps ratings, then they can be entered as one frame description but with different Trip Amps. In most cases, the trip characteristics data for various MCCB ratings may be different although the same frame size is the same. In such cases, the data must be entered using different frame descriptions.
Frame Size: The Frame Size is the maximum rated continuous current that any frame can have. Typical frame sizes are 125A, 250A, 400A, 600A, 800A, etc.
Trip Amps: Trip Amps is the rated continuous current of the MCCB above which the device trips.
