LC-608

Product Details

Product Description

Product Description
Brand: ABB
Type: LC-608
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 of our 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.
Alternatively the turbine’s overspeed logic and circuitry can be tested remotely, by programming an Overspeed Test contact input. The Overspeed Test contact functions as the OSPD key on the 505E’s service panel. When the conditions outlined in the above procedure are met, closing this contact allows the Speed setpoint to be increased up to the “Overspeed Test limit” setting. The testing procedure is similar to using the OSPD key. An Overspeed Test Enabled relay can be programmed to provide the same status feedback as the front panel Overspeed Test LED.
The Overspeed Test function cannot be performed over the communications links, however, the Overspeed Test Permissive, Overspeed Test In Progress, Overspeed Alarm, and Overspeed Trip indications are available through the Modbus links. F3 and F4 Keys The F-key (F3 & F4) screens appear only when programmed for a specific function. The screens that appear will vary depending on the function programmed. The F-keys can be programmed to perform a variety of functions including: Local / Remote Extr/Adm Control Enable Idle / Rated Remote Extr/Adm Setpt Enable Halt / Continue Auto Start Sequence Casc Control Enable Remote Speed Setpt Enable Remote Casc Setpt Enable Sync Enable Aux Control Enable Freq Arm / Disarm Remote Aux Setpt Enable Energize Relay Output Select Ext/Adm Priority In the RUN mode, the assigned function may be selected or deselected by pressing the assigned function key, then the Yes or No keys respectively. The screen will display the present status of the function and prompt the appropriate (Yes/No) key required to change the status. Limiter (LMTR) Key Screens Figure 5-7 shows the screens that appear when the LMTR key is pressed. These screens are always active and always displayed. The order in which the screens appears varies with the position of the HP Valve Limiter. When the HP Valve Limiter is at maximum (typically 100%), screen 2 appears first when the LMTR key is pressed. During normal operation the HP Valve Limiter setting is at 100% and not limiting. Typically, the only time this parameter is adjusted is during a start sequence or to troubleshoot system dynamics problems. The HP valve demand can be viewed from screen 3 and the HP limiter setpoint can be viewed from screen 1. To manually position the HP governor valve with the HP Valve Limiter setpoint, the HP limiter setpoint must be decreased below the HP actuator demand signal (LSS bus output). Once below or equal to this signal, the limiter setting will be the actuator output signal and thus governor valve position will be set manually by the limiter. The LP valve demand can be viewed from screen 3 and the LP limiter setpoint can be viewed from screen 2. To manually position the LP governor valve with the LP Valve Limiter setpoint, the LP limiter setpoint must be increased above (or decreased below if admission or extr/adm) the LP actuator demand signal (HSS bus output/LSS if any admission is possible). Once above (below if admission or extr/adm) or equal to this signal, the limiter setting will be the actuator output signal and thus governor valve position will be set manually by the limiter. The valve limiters can be adjusted with the ADJUST UP or DOWN front panel keys from screens 1 or 2, HP or LP Valve Limiter Raise or Lower contact inputs (if programmed), or commands through a Modbus link. In addition the setpoint can be directly entered using the ENTER key from screens 1 or 2.

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