Turbomachinery Package Specification

Taurus 60 Compressor Set and Mechanical Drive

 

 

The system is configurable from the control processor. It detects preprogrammed alarm and shutdown levels. See the specification tables for a list of monitored channels.

10.3.5Backup Shutdown System

The backup shutdown system shuts the package down in a safe and orderly manner without damage to the equipment in the event of a failure in the primary system. The control processor is monitored by both an internal watchdog circuit and by an external watchdog device. If either circuit detects a processor failure, the backup system takes control. It depressurizes the compressor (if applicable), closes the fuel valves, and initiates a post lube cycle to protect the turbine bearings. Once a backup shutdown is initiated, operation can only be restored manually from the control panel after all faults have been cleared. The emergency stop push-button switches are wired to both the primary and backup systems.

10.3.6Fire and Gas System

Enclosed packages require fire and gas control protection. The Eagle Quantum Premier system from Det-Tronics detects combustible gas and/or fire inside the enclosure based on inputs from gas, thermal, and optical flame detectors. If fire is detected, the system releases an extinguishing agent into the enclosure. If a fire or an unacceptable gas level is detected, the system instructs the Turbotronic control processor to initiate a package shutdown. The system is also wired directly to the backup shutdown system. See Enclosure Section 12 for a more complete description.

10.3.7Control System Power Supplies

The control system operates on 24 VDC power. The standard battery charge system provides 120 VDC power to the control system. The control system includes a 120 to 24 volt DC-to-DC converter to supply 24 VDC power to the control system. For a more detailed description of the battery charger system, refer to Section 15, Accessory Equipment.

10.3.8Interconnect Cables – Offskid Control Systems

With the offskid controls configuration, interconnect cabling must be provided between the package skid and the control console. This cabling is not in Solar’s standard scope of supply. Solar’s standard wiring recommendations are based on a cable length of 76 m (250 ft). For interconnects over 76 m, the wire gages must be adjusted to maintain the equivalent loop resistance of the Turbotronic 4 standard design, and must not exceed a 5% voltage drop. This may require a larger wire gage. For interconnects over 76 m, low capacitance wire (0.03 μF/m; 0.01 μF/ft) must be used for the speed signal and vibration cables.

10.4System Monitoring and Control Functions

The control system provides sequencing control during gas turbine startup, steady state operation, and shutdown. Protective functions are provided during all stages of operation.

10.4.1Starting and Loading

The Start command initiates the sequence. Prior to rotation, the lube oil pump undergoes a test cycle, the enclosure fans (if applicable) are started, and the fuel valves undergo a test cycle with fuel pressure verification.

The starter then rotates the gas turbine and the compressor develops airflow to purge any accumulated gas in the gas turbine, air inlet, and exhaust duct. The purge cycle is tailored to the exhaust duct volume.

When the engine has reached the required speed and temperature, a small amount of fuel is introduced into the combustor from the gas torch and ignited by the ignitor plug.

© 2009 Solar Turbines Incorporated. All rights reserved.

TPS60CSMD/309

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