Forchtenberg - KRIWAN worldwide market leader in compressor protection technology, combines for the first time PTC protection technology with exact temperature monitoring in one sensor. In the new KRIWAN PTC+ sensor, a linear PTC ensures dependable motor protection by switching off the system when the nominal response temperature (NRT) is reached. This means that, for the first time in a single sensor, both protection and continuous, dynamic system monitoring can be carried out. KRIWAN PTC+ sensors are compatible with current KRIWAN protection and diagnosis units and can be used as an upgrade to traditional PTC screw-in and coil sensors. KRIWAN PTC+ sensors are available in three models: as a screw-in sensor, as a coil sensor and as a contact sensor. temperature sensor accurately measures the temperature while the integrated

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The latest generation of protective devices is extremely reliable and has configurable parameters and diagnosis functions. The theme of KRIWAN's stand at the SPS IPC Drives 2015 trade fair in Nuremberg is thus "Multi Parameter Condition Monitoring".

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New motor protection relays from KRIWAN are both secure against manipulation and simultaneously individually adjustable. The trip parameters determining the individual protection functions have been migrated to the software and can be set by means of a USB interface - wholly in the spirit of Industry 4.0. The administration of motor protection thus becomes centralized, tamper-proof and in the end less costly.

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Intuitive, informative, always at hand: KRIWAN, specialist for machine protection, presents the web portal INTelligence for condition monitoring of machines in plants and systems.

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The KRIWAN INT280 monitors and regulates oil levels and can be used in multi-compressor packs with several parallel pistons or scroll compressors. As oil is actively refilled from a shared reservoir, problems caused by oil carry-over are eliminated. What’s more, the compressor is switched off when it is not possible to ensure the required oil level. The new version of the INT280 oil level regulator boasts a wealth of new features.

Intelligent filling algorithm

A fixed algorithm for refilling oil does not do enough to meet the needs of different compressor types. KRIWAN has developed an adaptive algorithm that is able to adjust itself automatically within secure operating parameters.

 

 

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Forchtenberg, 12 June 2015 – KRIWAN has released version 2.0 of its INTspector app. Compressor protection units such as INT69 Diagnose or oil level regulators such as INT280 can now be read directly with an Android smartphone using a USB cable. The app is available free of charge from the Google Play Store and for the first time enables operating data relevant for analysis and diagnosis to be transferred directly from the protection unit memory to a smartphone or tablet. The function requires a DP-USB gateway. As before, the data sheets for the KRIWAN protection units can be accessed using the INTspector app by scanning the data matrix code. This means that all of the relevant information is available to technicians during maintenance and repair work on the system, quickly and without the use of paper.

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Forchtenberg, Germany, May 2015 – The innovative KRIWAN INT69-2 diagnostic and motor protection devices are not only approved for industrial use, but are also now certified for household use according to IEC/EN 60335 (international) and UL 60730 (USA/Canada). This legal protection enables KRIWAN, the world’s market leader in compressor protection technology, to now use the diagnostic and motor protection devices for new applications in the household appliance sphere, such as for protecting heat pumps. Air-conditioning and heating systems for private homes are an important growth market for the future for many compressor manufacturers that use the two-channel INT69-2 protection devices.

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Electric motors are referred to as rotor-critical motors if the rotor reaches a critical temperature limit faster than the stator winding when the rotor is locked. If the stator winding reaches the critical temperature faster, the machine is referred to as stator-critical.

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