Product Details
Product Description
Product Description
Brand:ABB
Type:SM811K01 3BSE018173R1
Origin: the Swiss
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.
Valve Limiters The HP and LP valve limiters limit the HP and LP valve output signals to aid in starting up and shutting down the turbine. The output of the HP valve limiter is low-signal selected with the output of the Ratio/ Limiter. The lowest signal will control the HP valve position. Thus the HP valve limiter limits the maximum HP valve position. The output of the LP valve limiter is high-signal selected with the output of the Ratio/ Limiter when configured for Extraction steam turbines, and low-signalselected when configured for Admission or Extraction/Admission steam turbines. Thus the LP valve limiter limits the minimum or maximum LP valve position depending on the configuration selected. The valve limiters also can be used to trouble shoot 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, to not allow the system to reach a dangerous operating point.
The level of each valve limiter can be adjusted through the 505E keypad, contact input, or Modbus communications. When raise or lower commands are received, the respective limiter ramps up or down, at its programmed ‘Valve Limiter Rate’. In all cases a limiter’s range is defaulted to 0-100%. Each Valve Limiter’s ‘Rate’ and ‘Max Valve position’ settings can be adjusted in the Service mode. The shortest length of time a setpoint will move for an accepted raise or lower command is 120 milliseconds (240 milliseconds for a Modbus command). If a Valve limiter’s rate is programmed for 10 %/sec, the smallest increment it will move is 1.2 % (2.4 % for a Modbus command). To “enter” a specific setpoint from the 505E keypad, press the “LMTR” key to view the Valve Limiter screen, press the ENTER key, enter the setpoint level desired, then press the ENTER key again. If a valid number was entered, equalto or between the min and max limiter settings, the setting will be accepted and the Valve Limiter will ramp to the “entered” level. If an invalid number is “entered”, the setting will not be accepted and the 505E’s screen will momentarily display a value out-of-range message. A specific setpoint may also be directly entered from the 505E keypad, (not through Modbus). When a valid setpoint value is entered, the respective limiter will ramp at its ‘Valve Limiter Rate’ to the newly entered setpoint value. This ‘Entered’ rate is tunable through the Service mode. To adjust a limiter’s level from the 505E’s keypad, press the “LMTR” key to view the limiter screen. If the desired limiter (HP or LP) screen is not displayed press the Scroll Up/Down key to display it. Then press the Adjust Up/Down key as desired.
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