Power Electronics SD750K, Hardware And Installation Manual

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POWER ELECTRONICS SD750K
CONTROL CONNECTION
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As shown in the figure above, the SD750 Kompakt drive and the ATEX relay must be installed in a safe
zone, outside the ATEX zone. This solution is valid for motors with "Ex d" or "Ex p" protection installed
in zones 1 and 2, or motors with "EX nA" protection installed in zone 2. The external relay must be
certified for ATEX zones and Must be compatible with the following features: 24 Vdc power supply
voltage, 2 safety inputs, at least 2 open contacts and reset function. (Example: ZIEHL - PTC MSR 220Vi).
The SD750 Kompakt series features a dV/dt filter and a unique CLAMP
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system that reduces dV/dt and
voltage peaks in the motor windings. This reduces the risk of voltage leaks in the windings, motor
overheating and leakage currents through the bearings. In addition, it is possible to regulate the thermal
protection of the motor, thus increasing the protection against overheating in the motor. In self-ventilated
motors, the inverter may require an oversizing according to the derating curves provided by the motor
manufacturer.
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Only in equipment with rated voltage of 690 Vac.