Taurus Group 60 10 Turbotronic 4 Control System, 10.1General Description, 10.2System Architecture

Turbomachinery Package Specification	Taurus 60 Compressor Set and Mechanical Drive

10 Turbotronic 4 Control System

10.1General Description

The Turbotronic 4 control system controls and monitors the turbomachinery package including the gas turbine and driven equipment. The system scope can be expanded to include monitoring and/or control of balance of plant equipment that is directly package related. The system architecture is based on a Rockwell Automation/Allen-Bradley hardware and software platform and includes fully integrated driven equipment, vibration and, when required, fire and gas monitoring and control subsystems. The primary control system components may be mounted either “onskid” on the package skid (Figure 14) or “offskid” in a freestanding console (Figure 15).

The onskid design is approved for use in areas classified as Class I, Group D, Division 2, by the National Electrical Code (NEC) and in areas classified as Zone 2, Group IIA, under the Committee for Electrotechnical Standardization (CENELEC) standards. An auxiliary display and monitoring system is available, mounted in either an optional console or a desktop computer. Control connections between the package and the auxiliary display are through a pair of redundant network cables. A limited set of hardwired cables may also be required depending on the configuration.

For NEC Division 1 and CENELEC Zone 1 applications, the offskid design must be used. This design requires a full set of hardwired interconnect cables between the package, the control console, the motor control center (MCC) and any other controlled items.

An independent backup shutdown system provides additional protection. This shuts the package down in a safe and orderly manner in the event of malfunction of the primary control system.

10.2System Architecture

Key system components include:

•ControlLogix controller (Allen-Bradley)

•RSLogix 5000 programming software (Rockwell Automation)

•1794 Flex I/O input/output modules (Allen-Bradley)

•1701 FieldMonitor vibration monitoring system (Bently Nevada)

•ControlNet network (ControlNet International)

•TT4000 offskid display and monitoring system (Solar Turbines)

•Offskid operator control panel* (Solar Turbines)

•TT4000S onskid local operator interface (Solar Turbines)

•Onskid operator control panel (Solar Turbines)

•Fire and gas monitoring and control system (Det-tronics)

•Independent backup shutdown system (Solar Turbines)

*Included with standard offskid configuration, optional with onskid configuration

Figure 16 provides an overview of the principle control system elements. The ControlNet network provides primary communications between components. Hardwire backup is provided for critical circuits. The TT4000S and onskid operator panel are located on the package skid. The TT4000 and offskid operator panel are located in a non-hazardous area such as a control room. The variable speed frequency drive (VFD) for the start motors is typically located in a motor control center. All other components are rated NEC Class 1, Division 2 or CENELEC Zone 2 for hazardous area duty and are located on the package skid for the onskid controls configuration or in a console for the offskid configuration.

TPS60CSMD/309