Protection system will be healthy or not in case of display in release is not glowing when the load is less than the 20% of the breaker(MCCB, ACB)capacity

Yes, the protection system will work even below 20% load to turn on the display of the MicroLogic
For MTZ X, the protection functions of MicroLogic 2.0X, 3.0X, 5.0X & 6.0X control units operate without an auxiliary power supply. The control unit is powered by the current flowing through the circuit breaker.
For MicroLogic 7.0 X, the protection functions of the control units operate without an external auxiliary power supply. In addition, a VPS (voltage power supply) module is necessary to ensure the operation of the earth-leakage protection in the case of a fault with very low current.
For NW à The following will be powered and functional even if the trip unit is not externally powered.
The Fault protection for LSIG functions. The A, E, P & H trip unit is fully circuit-powered for fault protection. LED trip indication (powered by an onboard battery). The battery’s only function is to provide LED indication if all other power is off.
For MTZ Active à The protection functions of MicroLogic 2.0, 3.0, 5.0 & 6.0 control units operate without an auxiliary power supply. Installing a stable 24V power supply will keep all the Micrologic Active functions awake, regardless of the load value.
For MCCB Micrologic 5, 6 & 7 versions, refer the attached snapshots from the user guide.

Released for: Schneider Electric India