LXN1604-6

Brand:ABB

Type:LXN1604-6

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.

EXTR/ADM Input Depending on the control action required, the Extr/Adm PID’s input signal can be inverted. When used with a typical extraction, admission or extraction/admission turbine application this input should not require inverting. Upon a loss of the Extr/Adm input signal during operation, the 505E can be programmed to trip, continue running and ramp the LP valve to its open limit, or continue running and ramp the LP valve to its closed limit. When a failed input is sensed the LP valve limiter steps to the LP valve’s last position, then ramps at a 1% per second rate to its min or max limit, depending on the programmed settings. The 505E senses an input failure and issues an alarm if the 4–20 mA Extr/Adm input signal goes below 2 mA or above 22 mA.

Extraction control can be automatically or manually enabled and performed after one of the 505E’s three starts have been accomplished, and related permissives met. Typically a turbine is controlling speed/load at a rated speed setting and loaded to a minimum load point before extraction control is enabled. After a startup, the HP and LP valve limiters should normally both be fully open. If the HP valve limiter is not fully opened, it will act as a speed/load limiter and will interfere with automatic governor operation. When configured for Extraction control the 505E’s LP valve limiter is high signal selected with the output of the Ratio/Limiter. Because the LP valve limiter is automatically ramped to 100% during system start-up the LP valve cannot be controlled below its 100% open position. All related Extraction enable permissives must be met before the 505E will allow the Extr/Adm PID to take control of a process. 

The Extraction and/or Admission enable permissives are: • Extr/Adm input not failed • Turbine speed above programmed permissive speed • Gen breaker closed (if configured) • Tie breaker closed (if configured) There are two ways of enabling/disabling extraction control: manually or automatically. The manual enable/disable routine uses the LP valve limiter’s raise/lower commands, and automatic enable/disable routine uses an enable/disable command. Automatic enabling/ disabling can only be performed if the “Automatic Enable?” setting is programmed “Yes”. With automatic Extraction enabling programmed, an operator can also enable and disable Extraction control manually if desired. Manual Enable / Disable To manually enable Extraction control slowly lower the LP valve limiter until the Extr/Adm PID takes control of its process, then continue running the LP valve limiter to its minimum (closed) position. If the LP valve limiter is not fully closed, it will act as an extraction limiter and will interfere with automatic governor operation. All related Extraction permissives must be met before the 505E will allow the LP valve limiter to be lowered, and Extr/Adm control enabled.