Rockwell Automation 1902 Syncpro II - Manual (Page 10)

10 Rockwell Automation Publication 1902-IN001B-EN-E - April 2013
Chapter 1 Product Description
When the maximum programmed percentage of synchronous speed (set point) is
obtained, the field coil is energized on the falling pulse of the negative square
wave (i.e. a rising sinusoid) from the slip frequency generator. A fixed time period
after synchronization, the autoload signal is raised. The field coil is energized
only if the TRANSITION COMPLETE has been received.
Optional Equipment
• Field Current Failure Relay
• Load and Unload Auxiliary Contacts – The outputs are energized 2 sec.
after the field is applied and is maintained until the field is removed.
Display/Metering Features The product in conjunction with the PanelView 300e Micro Terminal (PV) will
perform the following metering/display functions:
• display all detected fault conditions
• display the slip frequency and starting time during startup
• display the power factor during run mode.
• accept set points for the following:
– maximum % asynchronous speed [% of synchronous speed]
– power factor set point and trip delay
– maximum allowable time at stalled state (maximum slip
– maximum allowable time at 50% speed
– maximum allowable time at synchronizing speed (typically at 95%
speed)
– function order (allows adjustment of the slope of the acceleration/stall
time trip curve).
– incomplete sequence timer trip delay
– fault mask for PF transducer diagnostics
Refer to Chapter 5 for complete details.
Squirrel-Cage Winding Protection Protects the squirrel-cage winding from long acceleration and stall
conditions during starting.
Field Winding Application Control The signal that triggers application of the field excitation when the
programmed asynchronous speed is obtained.
Incomplete Sequence Timing Relay Trips the system if the overall starting time is exceeded.
Pull Out Protection Monitors the lagging power factor during running to detect a loss of
synchronism
Field Voltage Failure Relay Input Monitors the condition of the static exciter output. This relay must be
supplied by the customer if the SyncPro II is not supplied as a configured
unit within an Allen-Bradley motor controller.