SPS / IPC / Drives 3 Hall, Booth 119
Danfoss shows a new highly efficient drive cooling concept, which will be provided together with Rittal, as well as for the first time integrated safety and monitoring modules for VLT frequency converters. The task of relocating functional machine safety into the drive while retaining the handling of previous, discrete safety concepts led to this new approach, which was realized with the MCB 140 / 150 safety module.
At the heart of this solution with MCB 140 is the complete separation of the safety and drive parameters as well as the internal processor architecture to the drive. As a result, the safety module behaves more or less like an external safety component, but offers the space-saving and cost-saving advantages of a drive-based safety technology. According to EN 61800-5-2 SIL 3, the MCB 140 offers among others SS1 (Safe Stop 1), SLS (Safe limited speed), safe standstill monitoring, SMS (safe max speed), an ext. Contactor as well as a protective door monitoring and unlocking. In contrast, the MCB150 is networked directly with the inverter and thus prepared for future connection to customary safety bus systems.
The drive-integrated monitoring device is used to detect insulation faults and impermissible ground fault currents. The device, specially adapted to VLT inverters, monitors the complete drive system, including filter, frequency converter, motor and motor cable. The completely preconfigured connection kit makes commissioning quick and easy. Parameterization is not necessary. It is particularly suitable for reliable operation in IT or TN networks and reliably prevents production losses in these systems.
Also new is the combined air / water cooling. The new module comes pre-assembled and can be easily integrated into any TS30 system with just 60 cm width and 8 cm depth. It monitors the temperature of the inside of the control cabinet and, thanks to the circulation of the water, ensures highly efficient cooling. The warm air flows through a heat exchanger, which uses the water to remove the heat loss from the control cabinet and, if necessary, feed it to other processes. With just one module, up to 10 kW of waste heat can be converted. Thus, this concept represents an efficient and flexible alternative to pure liquid-cooled devices.