The new CMS 356 is a voltage and current amplifier for analogue low-level signals provided by a CMC test set or by any other signal source, such as a digital real-time power system simulator. When combining it with a CMC test set, the amplifier extends the capabilities of the test set to provide additional output channels or higher output currents.
The CMS 356 with its four voltage outputs (300V each) and six current outputs (32A each) offers numerous output configurations, for example, 3 x 300V + 3 x 64A or 6 x 32A. Therefore, it covers the applications of both previous amplifiers, CMA 156 (6 x 25A) and CMS 156 (3 x 250V + 3 x 25A), in a single device. It even surpasses its predecessors with the improved output characteristics and the possibility to calculate and output residual voltage and current to the device under test. With the powerful current outputs, it can be used for testing high-burden electromechanical relays, as well as modern numerical relays even with long test leads. The analogue low-level inputs now have an additional input range with ±10 Vpeak maximum amplitude.
An easy-to-use web interface is available for configuring and monitoring the device status. Default configurations are ready-to-use for common tasks and the user can save any other configuration on the device for later use.
Current outputs of several CMS 356 amplifiers can also be connected in parallel to the same device under test. This allows for output amplitudes higher than 3 x 64A. For example, 3 x 128A can be achieved with two CMS 356 or 3 x 192A with three CMS 356.
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