Fax; Transient And Disturbance Recording - Ametek TR-2100 Operation Manual

TR-2100 User Manual 17

Fax

It is possible to set the TR-2100 to automatically send a fax of the fault record when the
system is triggered. This allows users that do not have direct access to Display Station (i.e.
maintenance) to be made aware of the fault. This feature is functional if the data modem
used for normal communication with Display Station is compatible with Group 3 fax
transmission. The display format for the fax output is very similar to the printed output.

Transient and Disturbance Recording

For transient recording, all the inputs are sampled at up to 384 samples per cycle (19,200
samples per second at 50 Hz or 23,040 at 60 Hz) and stored in a circular memory buffer.
The input levels are compared with defined values to check for an abnormal condition (e.g.
an under voltage or an over current). If one is detected, the TR-2100 triggers and starts
storing the sampled data in a separate post-fault buffer. After a fixed time, or after the inputs
have returned to normal, the TR-2100 will stop saving data to the post-fault buffer and start
a new circular buffer.
The data in the first circular buffer and the post-fault buffer form a data record that has
saved data from the analogue and digital inputs before, during, and after the time the trigger
condition was seen. This record may be printed or sent to Display Station for display and
analysis.
Disturbance recording works in a similar way except that the RMS and phasor information
is saved twice per cycle (100 samples per second at 50 Hz, or 120 samples at 60 Hz). The
recording times for a disturbance record may be several minutes. The triggering modes are
aimed at longer-term events such as system stability and some power quality parameters.
Automatic printing of disturbance records is not available.
The transient and disturbance recorders may be cross triggered so that the disturbance record
can act as extended pre- and post-fault data for the transient record.
To set the triggering conditions and read the data records, simply plug a portable computer
(running Display Station software) into the program port on the front of the TR-2100. One
computer can be used for many TR-2100s, thereby reducing costs and making the parameter
and record data more secure. All the functions available from the front port are also
available remotely via a modem or data network.