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Protection of wind turbine structures

Different structural parts of a wind turbine oscillate, move or vibrate. The tower, blades, nacelle, main bearing and gearbox are some of the main components which are important to monitor. If these components, oscillate, vibrate too much or if they break loose and create large shocks it can endanger the wind turbine or cause severe damage. Therefore, monitoring these components is an important part of the wind turbine safety chain. The PCH 1026 vibration monitor has been specially developed to fulfill this task and it is certified by Germanischer Lloyd according to Guide Lines 2010 chapter and and rated according to the functional safety standard ISO 13849-1 as a PL= d rated component.

Years of experience
PCH Engineering has many years of experience in designing vibration monitors for wind turbines. Since our first wind turbine protection monitor in 1998 we have been the leading provider of safe protection systems to wind turbine manufacturers all over the world.

Our engineers help manufacturers to optimize the protection of the wind turbine both in projects for new wind turbines and in design improvements in existing wind turbines. By choosing us you get a professional worldwide partner, who listens to your requirements and modifies the solution accordingly.

Your safe choice in protection monitoring
We offer wind turbine manufacturers a well-tested procedure using signed specification documents to ensure that each monitor is set as requested.

The monitor is fully configured for use and includes technician and administrator access levels for maximum security.

We constantly develop our products and offer you new and safe technologies, which improve the safety chain of the wind turbine. Our products grow together with your wind turbine and can always be upgraded or adapted to your future needs. We always select high quality and high precision components and offer the monitors at attractive prices.

PCH 1026 Digital Structural Vibration Monitor

The PCH 1026 offers permanent monitoring of low frequency structural and seismic vibrations. PCH 1026 is a monitor for very low frequency applications, such as the tower and blades of wind turbines or steel towers, chimneys, bridges and buildings. The PCH 1026 is certified according to Germanischer Lloyd GL2010 guidelines and ISO13849-1 as a Pl=d safety component. In addition to this it is also certified to monitor vibration in buildings according to ISO 4866.

The PCH 1026 is an all-digital vibration monitor. It has 3 internal sensors (accelerometers) allowing for measurements in 3 directions (X, Y and Z), each with independent conditioning channels available. The filter techniques used in the conditioning channels are based on experience from a vast amount of wind turbine applications. If necessary, also 2 or 3 conditioning channels can be assigned to just one sensor, i.e. one direction, if signals of different frequencies have the strongest appearance in the same direction.

In addition to the internal sensors the PCH 1026 can also be connected to both one, two and three directional external sensors like the CHB 1102/17 and the CHB 1101. When using these options, the monitor will be able to monitor tasks like nacelle differential nacelle vibrations, torsional vibrations from the output shaft of the gearbox and many other tasks needing multiple pick up locations in the wind turbine.

The PCH 1026 offers the following outputs:
  • up to 4 independent industrial 4-20 mA outputs,
  • up to 4 independent alarm relays,
  • 1 System Failure relay,
  • RS-232/RS-485, CANopen, InterBUS, ProfiBUS, DeviceNET, EtherCat, Ethernet/TCP etc.

PCH 1026 is supplied with a PC program, which makes setup and configuration of the monitor a very easy task to do. The configuration is done through the RS232/USB service port.

The PCH 1026
comprises a test function which can be used to test both the internal sensors (accelerometers) as well as the outputs of the monitor. It reports to any connected controller by means of the System Failure relay and the serial port. Details concerning the cause of the System Failure can be found using the comprehensive information list in the supplied PC program. The PCH 1026 has a test pin for PLC controlled self-test.

The PCH 1026 is designed in close cooperation with the leading wind turbine manufactures and is daily protecting several thousands of wind turbines all over the world.

PCH 1026 provides far more precise electronically surveillance of the wind turbine than today's existing mechanical and electronic detectors, thus resulting in fewer faulty shutdowns and a more economical power production.

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