PA7300 Instruction Manual - TECO-Westinghouse Motor Company

1st digit = 0Input Phase Loss protection function ineffective.1st digit = 1Input Phase Loss protection function effective.2nd digit (Output Phase Loss Protection, OPL)The output phase loss protection function is disabled during the inverter is stop orDC injection braking or inverter output current 30% of inverter rated outputcurrent. The effectiveness or ineffectiveness of output phase loss protection functioncan also be selected by the 2nd digit of Sn-13.2nd digit = 0Output Phase Loss protection function ineffective.2nd digit = 1Output Phase Loss protection function effective3rd digit (Heat Sink Cooling Fan ON/OFF Control)3rd digit = 0Inverter heat sink cooling fan runs while the inverter power ON.3rd digit = 1Inverter heat sink cooling fan runs only while the heat sink temperatureis higher than 50.(14) Protective Characteristics Selection 5 (Sn-14)1st digit (motor protection)1st digit = 0Electronic thermal motor protection is enabled.1st digit = 1Electronic thermal motor protection is not enabled.2nd digit (selection of electronic thermal characteristics)2nd digit = 0Electronic thermal characteristics are in accordance with reducedtorque motor (standard motor).2nd digit = 1Electronic thermal characteristics are in accordance with constanttorque motor (special motor).3rd digit (electronic thermal time constant)3rd digit = 0Used for standard motor and special motor (standard-time ratings, 8minutes)3rd digit = 1Used for motors other than the above (short-time ratings, 5 minutes)The electronic thermal overlaid function monitors motor temperature, bassed oninverter output current and time, to protect the motor from overheating. Whenelectronic thermal overload relay is enable, on "OL1" error occurs, shutting OFF theinverter output and preventing excessive overheating in the motor.When operating with one inverter connected to one motor, an external thermal relayis not needed. When operating several motors with one inverter, install a thermalrelay on each motor, In this case, set constant Sn-14=XXX1.4th digit (Not used)84