ProTechTPS Total Protection System
Manual 26710V1
82
Woodward
Event Log
Each module logs the last 50 events seen by the Event Latch. This log stores the
event description, time and date of the event, “first out” indication, and indication
if the module was performing a test when the event occurred. This screen
displays the most recent event at the top of the list, and allows users to scroll
through all logged events.
Peak Speed/Acceleration Log
This log stores the maximum speed and acceleration levels, and associated time
of the latest maximum since the last time the log was reset/cleared. This includes
the speed and acceleration levels sensed during an automatic or manual
overspeed testing routine. This log can be reset from the front panel with the use
of the Config Level Password.
Response Time Performance
The ProTechTPS’s total throughput response time can be as fast as 4
milliseconds or as slow as 19 milliseconds for frequencies above 1000 Hz
depending on the following:
Independent Trip Relay or 2oo3 Voted Relay models
Sensed frequency at overspeed trip point
Configuration/use of the Speed Redundancy Manager function
The definition of “total throughput response time” as used within this manual and
is displayed within the below graphs is the following: “the average time difference
between a change of input speed at the input terminal is made to the time a
change of output relay state at the output terminal is detected”. Average time
difference is displayed as event occurrence to module sample time differences
can result in a ±2 millisecond time difference.
Since the ProTechTPS 2oo3 Voted Relay models utilize extra internal interposing
relays to perform the 2-out-of-3 voting logic, the response time for these models
is longer than that of the ProTechTPS Independent Voted Relay models. Refer to
the graphs below to understand the system response differences between
models.
As can be verified by the following graphs, the faster the input frequency, the
faster a module’s speed detection logic can sense and accurately calculate a
speed signal.
Since the Speed Redundancy Manager function requires the sharing of all speed
signals between all modules, the total throughput response time of each module
configured is longer when the Speed Redundancy Manager function is
configured. Refer to below graphs to understand the system response
differences.