Long-time protection: The long-time protection function protects cables (phases and neutral) against overloads. This function is based on true rms measurements. Thermal memory: The thermal memory continuously accounts for the amount of heat in the cables, both before and after tripping, whatever the value of the current (presence of an overload or not). The thermal memory optimises the long-time protection function of the circuit breaker by taking into account the temperature rise in the cables. The thermal memory assumes a cable cooling time of approximately 15 minutes | User manual Merlin Gerin Modicon Square D__ Telemecanique Micrologic control units A A A and A Low Voltage Products Schneider ỊẾ Electric We do more with electricity. Micrologic control units A A A and A Discovering your control unit 2 Identifying your control unit 2 Overview of functions 4 Setting your control unit 10 Selecting the type of neutral protection 10 Setting procedure 11 Setting the Micrologic A control unit 12 Setting the Micrologic A control unit 13 Setting the Micrologic A control unit 14 Setting the Micrologic A control unit 15 Fault and status indications 16 Resetting the fault indications and checking battery status 16 Testing the earth-fault and earth-leakage functions 17 Menus 18 Accessing the menus 18 Measuring phase currents 19 Displaying the maximum current values 20 Resetting the maximum current values 21 Viewing the settings 22 Technical appendix 24 Tripping curves 24 Changing the long-time rating plug 26 Zone selective interlocking ZSI 27 Digital display 28 Thermal memory 29 1 Micrologic A Schneider Electric Discovering your control unit Identifying your control unit Designations All Compact NS800-3200 and Masterpact NT and NW circuit breakers are equipped with a Micrologic control unit that can be changed on site. Control units are designed to protect power circuits and connected loads. Micrologic A basic protection and ammeter g Long time Instantaneous E51450A Micrologic A Micrologic A selective protection and ammeter Z X type of protection c 2 for basic protection c 5 for selective protection c 6 for selective earth-fault protection c 7 for selective earth-leakage protection Y version number identification of the control-unit generation. 0 signifies the first generation. Z type of measurement c A for ammeter c P for power meter c H for harmonic meter c no indication no measurements Long time Short time Instantaneous Micrologic A selective earth-fault protection and .
