Manual triggerA disturbance report can be manually triggered from the local HMI, PCM600 or viastation bus (IEC 61850). When the trigger is activated, the manual trigger signal isgenerated. This feature is especially useful for testing.Binary-signal triggerAny binary signal state (logic one or a logic zero) can be selected to generate a trigger(Triglevel = Trig on 0/Trig on 1). When a binary signal is selected to generate a triggerfrom a logic zero, the selected signal will not be listed in the indications list of thedisturbance report.Analog-signal triggerAll analog signals are available for trigger purposes, no matter if they are recorded inthe disturbance recorder or not. The settings are OverTrigOp, UnderTrigOp,OverTrigLe and UnderTrigLe.The check of the trigger condition is based on peak-to-peak values. When this isfound, the absolute average value of these two peak values is calculated. If the averagevalue is above the threshold level for an overvoltage or overcurrent trigger, this triggeris indicated with a greater than (>) sign with the user-defined name.If the average value is below the set threshold level for an undervoltage orundercurrent trigger, this trigger is indicated with a less than (<) sign with its name.The procedure is separately performed for each channel.This method of checking the analog start conditions gives a function which isinsensitive to DC offset in the signal. The operate time for this start is typically in therange of one cycle, 20 ms for a 50 Hz network.All under/over trig signal information is available on the local HMI and PCM600.14.4.6.12 Post RetriggerDisturbance report function does not automatically respond to any new trig conditionduring a recording, after all signals set as trigger signals have been reset. However,under certain circumstances the fault condition may reoccur during the post-faultrecording, for instance by automatic reclosing to a still faulty power line.In order to capture the new disturbance it is possible to allow retriggering (PostRetrig= On) during the post-fault time. In this case a new, complete recording will start and,during a period, run in parallel with the initial recording.When the retrig parameter is disabled (PostRetrig = Off), a new recording will not startuntil the post-fault (PostFaultrecT or TimeLimit) period is terminated. If a new trigoccurs during the post-fault period and lasts longer than the proceeding recording anew complete recording will be started.Disturbance report function can handle maximum 3 simultaneous disturbancerecordings.Section 14 1MRK 504 135-UEN AMonitoring472Technical manual
