IRD Mechanalysis® Ltd is an industry leading provider of Condition Monitoring and Machinery Protection Solutions. With a heritage of over 60 years in machinery vibration and associated technologies, IRD designs manufactures and supports proven instrumentation suitable for harsh industrial environments. Today IRD boasts of providing some instrumentation in each and every power plant of India.
The IRD Mechanalysis model IRD8800 high integrity multi-channel machinery protection monitor is microprocessor based and programmable. Supplied in a standard 19ö Rack, it is panel mounted for general vibration measurement and turbine supervisory instrumentation. The IRD8800 series is a family of monitors designed to meet API670 specification 5th edition for power, petrochemical, oil and gas and other industries requiring protection of its strategic rotating machinery. The model IRD8800 evolved from 20 years of success with local and international installations. Its design and build quality offers the highest reliability, flexibility, ease of use as well a wide range of communication options. Derived from earlier generations of monitors, based on the proven IRD® architecture with state-of-the-art signal processing, the IRD8800 gives outstanding customer value. Since this product is not reliant on customized outsourced components, obsolescence is minimised, thus guaranteed support is likely for at least 20 years.
Each module is an independent monitor with its individual power supply and relays. In the unlikely event of a power supply failure only two channels will be affected. While this eliminates the need for a redundant power supply unit, it also avoids common mode failure. However, a redundant power supply module is available in OR logic mode for bump-less switching from primary supply to redundant supply.
The model IRD8800 Vibration Monitoring System (VMS) and Turbine Supervisory Instrumentation (TSI) systems are supplied in the standard 19ö Main Rack Frame for panel mounting with up to 14 channels. Wider as well as smaller racks are also available in 2, 4, 6 or 8 channel configuration where panel space is limited. For temperature, 28 channels are possible in a standard 19ö rack.
Each module has both digital and bar graph displays, which are ideal for operations. Viewing all channels in a rack is often more intuitive of a machine´s condition than a ´busy´ computer screen display from ´blind´ monitors. Standard features such as analyser outputs, warning (alarm), trip indication and machine start-up condition are easily visible on the front panel. The bar graph can be configured as a percentage of set warning (alarm) or trip levels thus making it convenient for operators to view signal levels in relation to alarm or trip settings. During system power-on and also in case of transducer failure (TX fail condition), the 4-20mA DC output is held below the 4mA level for DCS system to detect an unhealthy situation and warning (alarm) and trip relays are deactivated thus preventing uncalled for spurious alarms.
Programmable: Measurement units, ranges, warning (alarm), trip levels, sensor sensitivity, band pass filters etc. can be set from the password protected front keypad at any time. For customer convenience, specified units and ranges will be factory set at time of order.
The system provides industry standard isolated 4-20mA DC signal output per channel for interfacing with Distributed Control System (DCS) as well as RS485/MODBUS connectivity as standard. The RS232 output is available as an option to SCADA systems.
BNC connectors are also at the rear back plane of each module for providing buffered Time Wave Form (TWF) signals to any on-line multi-channel simultaneous or scanning diagnostics system. This offers comprehensive turbine diagnostics, applying the Dual Redundancy Parallel Processing (DRPP) architecture that provides greater system reliability. Where applicable, three BNC connectors, one for each channel and the third for tacho/phase reference are located on the front panel for use with a portable dual channel FFT vibration analyser.
Shaft phase measurement is available when a Tacho Module is installed. The same vibration BNC signal sockets are repeated at the rear of the rack.
The monitoring system provides 3 relays per channel for Alarm, Trip and Circuit fault. Start-up control bus deactivates Alarm and Trip relays and also pulls 4-20mA DC output below 4mA indicating invalid signal to the DCS. The monitor works on most common power supplies available in the control room and plant site. Each vibration module is calibrated to national standards via the IRD Mechanalysis state-of-the-art full frequency digital calibration system with an international traceable certification that is always valid. Barrier terminal strips are provided for all external wiring. Conduit entry holes are available at the bottom of the Main Rack Frame.
The monitor has been subjected to Type Tests and has passed all: Dry Heat Cyclic, IS:9000 P-III, Damp Heat Cyclic, IS: 9000 P-V, Bump IEC 68-2, Vibration IEC 68-2, Humidity IEC 68-2, Mark, European Union - IEC61326 EMI/EMC and IEC61010 Safety. It is suitable for Storage temp of 18¦C to 70¦C, Operating temp of 0¦C to 50¦C ambient and a humidity of 95% none condensing.
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