Product Details
Product Description
Product Description
Brand:EMBEDDED
Type:EPCDFBA#219 B2
Origin: the United States
Warranty: 365 days
Colour: new/used
Shipping method: Courier delivery
Module of PLC, DCS, ESD system card, the card is a vibration monitoring system, steam turbine control system module, the advantages of the gas generator spare parts brand: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts
Our main products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, mechanical, electronic manufacturing, automobile manufacturing, plastic machinery, electric power, water conservancy, water treatment/environmental protection, boiler heating, energy, power transmission and distribution and so on.
See the Starting Procedures in Chapter 3 for information on using the valve limiters during start-up. The valve limiters also can be used to troubleshoot system dynamic problems. If it is believed that the 505E is the source of system instability, the valve limiters can be positioned to manually take over control of the valve positions. Care should be taken when using the valve limiters in this fashion, so to not allow the system to reach a dangerous operating point. Starting Features The 505E provides options for three different starting modes: automatic, semiautomatic, and manual. One of these modes must be programmed to get the turbine from a shutdown state to speed control at minimum speed. The start mode configured and minimum governor controlling speed will depend on normal plant starting procedures and turbine manufacturer’s recommendations. If an idle speed is programmed (either idle/rated or auto start sequence), the 505E can provide automatic speed control and critical speed avoidance. A ‘Run’ command can be given through the 505E keypad, a remote contact input, or Modbus communications. In addition, an optional ‘Start Permissive’ contact input can be programmed to prevent a start if, for example, the trip-throttle or stop valve is not closed. Idle/Rated The idle/rated function gives the operator the ability to move between a programmed idle speed and a programmed rated speed at a configured rate. The selection of idle or rated speed setpoint positions can be made through the front panel keypad, through remote contact inputs, or through the Modbus communications links. The idle/rated function can also be programmed as a ramp-to-rated function only.
Auto Start Sequence The auto start sequence function gives the operator the ability to start from a programmed low idle speed, hold there until the programmed warm-up time has expired, then go to a programmed high idle speed, hold there until the programmed high idle warm-up time has expired, and finally move to the programmed rated speed setpoint. The hold times and the acceleration rates are dependent on whether the turbine is considered ‘hot’ or ‘cold’ based on the time the turbine has been shut down. When the turbine is between hot and cold conditions, the control interpolates between the hot and cold data points to determine the appropriate startup rates and hold times. The auto start sequence can be stopped and started, if desired, by using the auto start sequence halt/continue commands. The selection of halt or continue can be made through the 505E keypad, remote contact inputs (if configured), or Modbus communications. In addition, the auto start sequence can be programmed to automatically halt at each idle setpoint.
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