Rockwell Automation 825 Smart Motor Manager User Manual - Manual (Page 75)

Functions 3-42
Publication 825-UM001B-EN-P January 2001
Reset
When the motor is at standstill, a trip condition can be reset.
Kinds of Reset
• Manual reset — Press the reset button on the Bulletin 825 for at least 200 ms
• Remote reset — Short circuit terminals Y2l/Y22
• Automatic reset — In the mode “set values”, set automatic reset for:
• Thermal trip
• PTC trip
• PT100 trip
Reset Conditions
• Thermal — As soon as the temperature rise has dropped to the preset reset
threshold.
• PTC detector — As soon as the temperature is below the reset threshold
• PT100 detector — As soon as the temperature is below the tripping threshold.
• Asymmetry/Phase failure — Manual or remote reset possible
• All other trips — Can be reset immediately.
Table 3.V Reset Setting Parameters
Function of the Cat. No. 825-MST Option Card
Short-Circuit
Heavy phase currents caused by short circuits between phases and from phase to earth are
detected by the Cat. No. 825-MST option card. The supply can be interrupted immediately by
controlling the power switching device (e.g., circuit-breaker).
Short-circuit protection is always active. Therefore, the response level must be set somewhat
higher than the maximum starting current.
Setting range Manual/Automatic
Factory setting Manual
Reset Threshold of the Thermal Trip
Setting range 10…100%
Factory setting 70%
Setting increments 5%