Frequency inverters

New frequency inverter safety card protects machines more efficiently

New frequency inverter safety card protects machines more efficiently

New frequency inverter safety card protects machines more efficiently

New frequency inverter safety card protects machines more efficiently

New frequency inverter safety card protects machines more efficiently

As an extension or for retrofitting the Altivar frequency inverters, Schneider Electric has launched a new safety card that allows additional safety technology to be saved.

Machines in industrial applications, in particular, must meet high standards in accordance with the Machinery Directive applicable throughout Europe and always require an elaborate safety concept. From visual and acoustic warning signals to safety relays and light sensors, this can mean a whole lot of redundant technology that has to be additionally installed in, on and around a machine. With the new Safety Card, the financial and technological expenditure can be significantly reduced at this point.

More efficiency in safety matters increases productivity

The new Safety Card is suitable for use with the ATV 340 (0 to 75 kW) frequency inverter families for mechanical engineering and ATV 900 (0 to 1200 kW) for process technology marketed by Schneider Electric. Optionally and modularly integrable into new or existing systems, it enables - depending on the application - a cost- and time-saving elimination of external safety technology. At the same time, the Safety Card has a whole range of useful safety features that not only fulfil the requirements of the IEC 61800-5-2 standard, but in some cases even exceed them.

The "Safe Stop" function (SS1), for example, controls the safe deceleration of a motor and monitors the deceleration according to a specific deceleration ramp. Once standstill has been reached, the torque is safely switched off and the drive's internal Safe Torque Off function is activated. Thanks to the controlled speed reduction, the waiting time until a machine comes to a standstill is immensely reduced and manual interventions can be carried out with significantly faster cycle times. In connection with this, the Guard Door Locking (GDL) function of the Safety Card always guarantees safe opening of the safety doors.

In addition to SS1 and GDL, the Safety Card also offers other functions that can be implemented without an encoder system, which can prevent downtimes and protect a machine from heavy wear: "Safe Limited Speed" and "Safe Maximum Speed" enable the limitation and monitoring of the maximum speeds of saw blades and spindles, for example, and prevent operating errors. This saves energy and reduces maintenance and repair costs. During installation and implementation, the technician also benefits from the fact that both commissioning of the frequency inverter and parameterisation of the Safety Card can be carried out with just one software. This saves time and effort.

With the features of the Safety Card that can be integrated into the motor control, safe operation and installation of complex automation solutions are significantly simplified. By eliminating the need for additional safety technology and protecting motor operation from failures thanks to limits, safe run-down and constant monitoring and control, it is not only possible to save costs. Above all, the protection of technical personnel is increased and material wear is drastically reduced. In addition, the operation, maintenance and repair of a machine is much less time-consuming and more convenient. This increases the competitiveness and profitability of an operation.

Altivar frequency inverters

Schneider Electric's Altivar Machine and Altivar Process frequency converters guarantee reliable motor control of synchronous, asynchronous and reluctance motors. Thanks to their digital talents, they are suitable as part of a holistic solution architecture such as EcoStruxure to increase the overall efficiency of a plant. Not only do they allow demand-based and application-specific use of energy, they also protect low-voltage distribution and provide data on production processes and downtimes.