Description

The 3500/44M Aeroderivative GT Vibration Monitor is a four-channel module designed for continuous machinery protection and monitoring in aeroderivative gas turbine applications. It processes inputs from velocity transducers, accelerometers, and Velomitor sensors to assess asset health and protect vital machinery by comparing monitored parameters against configured alarm setpoints. This monitor connects to standard external termination blocks via the 126623-01 Aero GT I/O Module and structured cable assemblies. It accepts inputs from two independent Keyphasor signals, allowing each channel pair to process different tracking filters. By delivering real-time proportional values and essential machine data, it serves as a critical component for industrial operations and maintenance personnel.

Features

• Four-channel continuous machinery protection system tailored for aeroderivative gas turbines.
• Supports multiple filtering options including signal integration, 1X vibration tracking, and band-pass vibration.
• Dual Keyphasor inputs enable distinct tracking filters across separate channel pairs.
• Triple Modular Redundant (TMR) configuration capability utilizing voting architectures to eliminate single-point failures.
• Multimode channel configurations handling up to eight sets of distinct alarm parameters matching specific machine modes.
• Front-panel LED indications for module operation status, communication traffic, and bypass states.
• Coaxial buffered transducer outputs on the front panel for safe, short-circuit protected troubleshooting.

Applications

• Rolls Royce aeroderivative gas turbines: RB211 and Avon.
• General Electric aeroderivative gas turbines: LM1600, LM2500, LM5000, and LM6000.
• United Technologies Turbo Power gas turbines: GG3, G44, FT4, and FT8.
• Power generation stations, mechanical drive installations, and offshore oil and gas production platforms utilizing aeroderivative gas turbine drivers.

Ordering Information

Technical Specifications

Connections/Interfaces

The front panel and the rear Aero GT I/O Module with external terminations facilitate specific physical interfaces:

Installation Guidelines

• Slot Allocation: Install the main monitor module into a single full-height slot at the front of the 3500 Rack, and align the corresponding external termination I/O module into the matching rear slot directly behind it.
• TMR Grouping: For Triple Modular Redundant configurations, install the three aeroderivative monitors adjacent to one another in groups of three to enable hardware-level system voting.
• Cabling: Use a 129525 signal cable to link the external termination I/O module to the designated external termination block. Ensure the cable length options match the physical run limitations of your enclosure.
• Software Version: Use 3500 Rack Configuration Software version 2.50 or newer for standard aeroderivative configurations, or version 3.3 or higher for advanced multimode setups.
• Buffered Outputs: Front coaxial jacks can be coupled directly to oscilloscope or analyzer equipment without interrupting the monitor's baseline operation, due to integrated 550 Ohm short-circuit protection.

Compliance and Certifications

• EMC Directives: EN61000-6-4 Radiated Emissions, EN 55011 Class A Conducted and Radiated Emissions.
• Immunity Standards: EN61000-6-2, EN61000-4-2 (ESD Criteria B), EN61000-4-3 (Radiated Susceptibility Criteria A), EN61000-4-4 (EFT Criteria B), EN61000-4-5 (Surge Criteria B), EN61000-4-6 (Conducted Susceptibility Criteria A), EN61000-4-8 (Magnetic Field), EN61000-4-11 (Power Dip).
• Low Voltage Directive: EN61010-1 Safety Requirements.

FAQ

What sensor types can be connected to this specific configuration of the monitor?

The Aero GT I/O module interfaces directly to velocity transducers via Bently Nevada interface modules 86517 and 86497.

Can this monitor track vibration frequencies linked to varying machine speeds?

Yes, the integrated tracking filter uses a constant Q factor and is valid for machine speeds between 60 and 240,000 cpm, allowing tracking of 1X vibration amplitudes across varying operating conditions.

How does the system prevent a short circuit at the recorder or buffered outputs from affecting critical machine protection?

Monitor operation remains completely unaffected by short circuits on recorder outputs or front-panel buffered coaxial outputs because the channels feature built-in isolation and short-circuit protection.

What is the function of the multimode configuration on this device?

Multimode allows channels to possess up to eight sets of separate alarm parameters including alert and danger setpoints, which dynamically switch to match the active operating mode of the gas turbine via hardware contact inputs or communication gateway software commands.