Woodward 2301E-ST, Инструкция по установке и эксплуатации

Страница: 40 / 126

Manual 26694 2301E-ST
Woodward 38
Using the wrong the gear teeth setting or the Speed Ratio Setting
could cause an overspeed condition, resulting in damage to
equipment, personal injury or death.
11 USE CRITICAL BAND?
dflt=FALSE (FALSE, TRUE)
Set to TRUE to use the critical speed avoidance logic. When the speed setpoint is within the band, the
speed setpoint cannot be stopped. This band is used to protect the turbine and driven device from speeds
that have inherently high vibration.
12 CRIT SHDN TIME DLY (SEC) dflt=300 (0.0, 1200)
When the speed is in the critical band for longer than the delay time a trip is initiated. The tunable 11 Use
Critical Band must be set to TRUE to activate this.
13 USE MANUAL START? dflt=FALSE (FALSE, TRUE)
Set to TRUE to enable manual start mode of operation. Using this feature will cause the actuator output
to ramp fully open. This allows the operator to manually control speed of the turbine until governor speed
is reached. Only select one of the three start modes.
14 USE SEMI-AUTO START? dflt=FALSE (FALSE, TRUE)
Set to TRUE to enable the semi-automatic mode of operation. Using this feature will allow the operator to
control the valve ramp using the discrete input raise and lower switches. Only select one of the three start
modes.
15 USE AUTOMATIC START? dflt=TRUE (FALSE, TRUE)
Set to TRUE to enable the automatic mode of operation. Using this feature will allow the operator to
automatically start the turbine. Only select one of the three start modes.
16 START MODE = Displays the current start mode of operation selected.

NO START MODE SELECTED

MANUAL START MODE

SEMI-AUTOMATIC START MODE

IN-CORRECT MODE SETUP

AUTOMATIC START MODE
17 MAX DIFFERENT IN SPEED dflt=100.0(0.0, 1000.0)
Defines an allowable difference error for signals MPU1 & MPU2.
18 NUMBER OF GEAR TEETH MPU2 dflt=60 (16, 500)
Enter the number of teeth or holes of the gear that the magnetic pickup unit (MPU) is mounted to. This
value is used to determine the hertz-to-rpm relationship.
The maximum input frequency that can be measured by the speed
sensing circuit is 25,000 Hz. Therefore to allow for transient
conditions, the Number of Teeth times Rated RPM divided by 60
should be less than 19,000.
The number of gear teeth is used by the control to convert pulses
from the speed-sensing device to turbine rpm. To prevent possible
serious injury from an over speeding turbine, make sure the control
is properly programmed to convert the gear-tooth count into turbine
rpm. Improper conversion could cause turbine overspeed.
Released