Manual 26710V1
ProTechTPS Total Protection System
Woodward
73
Speed Fail Trip
If the “Speed Fail Trip” is Enabled, the Speed-Fail-Override is used to override
the speed fail trip logic. When the contact is open, the sensed speed must
exceed the Speed Fail Setpoint, otherwise a Speed Fail Trip occurs.
Trip
+
-
Speed
Speed Fail Setpoint
Speed Fail Override
Discrete Input
Closed contact = True
No speed
&
Speed Fail
Override
Inactive
Figure 3-15. Speed Fail Trip Diagram
Speed Fail Timeout Trip
If the “Speed Fail Timeout Trip” is Enabled, the sensed speed must exceed the
Speed Fail Setpoint within the Speed Fail Timeout Time after a Start signal
occurs, otherwise a Speed Fail Timeout Trip occurs.
The Speed Fail Timeout trip is cleared by the reset function (the trip
and alarm reset function, not the reset input to the timer in the
diagram below) even if speed is still below the Speed Fail Setpoint.
The start signal is generated by selecting the START button on the front panel of
a module or by closing the predefined Start contact input. The start signal is edge
triggered and re-selecting Start will reset the timer.
Timer
Reset
Start
Start
Expired
Speed ok
Trip
+
-
Speed
Speed Fail Setpoint
Figure 3-16. Speed Fail Timeout Trip Diagram
Start Example with Speed Fail Timeout Trip
First, any trips or alarms are cleared by issuing a reset command either by
pressing the reset key, or by momentarily closing the reset contact, or by issuing
the Reset command via Modbus.
When the turbine or equipment is ready to be started, the Speed fail timer is
started by pressing the start key, or by momentarily closing the start discrete
input. The timer expires when it reaches the Speed fail timeout value. If speed
does not exceed the Speed fail set point before the timer expires, the unit trips.
If the unit is being restarted after a normal roll-down where there was no trip, the
unit does not require a reset. The Speed fail trip is overridden because the
Speed fail timer is cleared whenever speed exceeds the Speed fail set point. The
Speed fail timer should be started by the operator when the turbine or equipment
is ready to be started again.
Содержание ProTech TPS
Страница 36: ...ProTechTPS Total Protection System Manual 26710V1 34 Woodward Figure 2 7 Inside View of ProTechTPS ...
Страница 37: ...Manual 26710V1 ProTechTPS Total Protection System Woodward 35 Figure 2 8 ProTechTPS Control Wiring Diagram ...
Страница 62: ...ProTechTPS Total Protection System Manual 26710V1 60 Woodward Figure 3 8 Simplex Trip Block Assembly ...
Страница 63: ...Manual 26710V1 ProTechTPS Total Protection System Woodward 61 Figure 3 9 Dual Redundant Trip Block Assembly ...
Страница 74: ...ProTechTPS Total Protection System Manual 26710V1 72 Woodward Figure 3 14 Start Logic Diagram ...
Страница 122: ...ProTechTPS Total Protection System Manual 26710V1 120 Woodward Advanced Menu ...
Страница 124: ...ProTechTPS Total Protection System Manual 26710V1 122 Woodward Declarations ...