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Safety Control System


The Fire and Gas Detection system provides early and reliable detection of fire or gas, plus continuously monitors all areas where a fire or an accumulation of a flammable or explosive gas mixture may occur. On detection of any of these events the Fire and Gas Detection system shall alert personnel and initiate timely executive action to minimize the consequences.

It is an element of the unit Integrated Control and Safety System (ICSS) and is defined as emergency electrical equipment, so its reliability and availability must be ensured. In order to achieve this assurance, the necessary levels of equipment redundancy and system self-test shall be incorporated and a high level of QA / QC shall be carried out on all phases of the FGS design, construction, installation and commissioning.

Generally, techniques of redundancy and replication shall be used to avoid common mode failure points such that one fault in the system does not make the system inoperable. This applies to both the Control System and field devices. SIL analysis methods, as described in IEC 61508/61511, shall in general not be used for the design of the FGS, as risk has already been reduced to ALARP level by the ESD system.

The FGS continuously monitors heat, infrared flame, smoke, temperature, manual alarm call-points and toxic or combustible gas levels with the use of dedicated field devices. The status of all FGS detectors shall be presented on the HMI and the Fire and Gas Matrix panel. If any combination of them (within a zone) exceeds a pre-determined level, the system will raise the alarm and take automatic action.

Typical actions from a FGS are to alert personnel, release fire-fighting systems, emergency ventilation control, stop flow of minor hydrocarbon sources such as diesel distribution to consumers, isolate local electrical equipment, initiating ESD and PSD actions, isolate electrical equipment and to close watertight doors and fire doors. Audible and visual alarms for Fire or Gas shall be initiated throughout the unit upon detection of gas or fire.

It shall depend upon the priority of alarm status, initiating the automatic operation of the following functions:

  • Unit Status alarms (Fire or Gas)
  • Emergency Shutdowns via the FGS / SIS system.



Excel Marco, as a VAR for CCC (Compressor Control Corporation), offers proven industry leading turbomachinery control applications such as:

Speed/ Extraction Control

  • Fuel Control
  • Generator Control
  • Anti-surge Control
  • High Speed Positioning
  • Integral Process Control
  • Compressor Load Sharing

We have engineered a wide range of CCC products for optimum turbomachinery control. The range of turbomachinery control product includes:

  • Series 3 Plus Platform
  • Series 4 Platform
  • Series 5 systems – including Series 5 Reliant and Series 5 Vanguard.
  • TrainView II operator interface software and TrainTools configuration software.

The various types of turbo-machinery that we can control are:

  • Turbine Driven Generators/Pumps
  • Centrifugal Compressors
  • Power Recovery Trains
  • Cryogenic Expanders
  • Hot Gas Expanders
  • Axial Compressors
  • Steam Turbines
  • Gas Turbines

We provide a full service in-house panel shop for the control systems. When it comes to on-site installation and start-up and commissioning services, we have a team of trained engineers with experience in turbo-machinery processes, instrumentation and control.

Every solution we build is as unique as each client’s requirements and technological processes. We customize our standard software and hardware as necessary to achieve fully integrated control and protection for every turbomachinery application.

A part from control systems for green field plants, we provide cost effective upgrades for existing controls primarily due to:

  • Product obsolescence
  • Increase process throughput
  • Poor control due to wear and tear
  • Plant expansion and de-bottlenecking

To conclude, for today’s manufacturers the safety of their facilities, personnel, production and the environment is crucial to achieving on-time delivery and minimizing any potential losses. Therefore to meet their safety needs while ensuring operational and business readiness at project start-up is a must.