Types of MCCB Protection Units
NA or Non-Auto
These breaker types have no protection what so ever and therefore are commonly used as buscouplers or where protection is not required
Introduction
There various protection types that are designed to protect power circuits and loads. We have selected the most popular, Schneider range of Micrologic protection units for examples, other manufacturers are similar but may vary slightly.
Micrologic 2.0E
The protection here is commonly known as Basic Protection giving Long Time Protection & Instantaneous trip functions.
Micrologic 5.0E
The protection here is commonly known as Selective Protection giving Long Time Protection, Short Time Protection & Instantaneous trip functions.
Micrologic 6.0E
The protection here is commonly known as Selective & Earth Fault Protection, giving Long Time Protection, Short Time Protection, Instantaneous trip functions and Earth Fault.
E = Energy Meter
The difference between A & E is simply E displays Amps, Volts, Power Factor, Power and energy metering measurements.