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The Eaton S811T18N3S Open Soft Starter operates with 18 Amps, a 200-600V Operating Voltage, and a 47-63 Hz Operating Frequency. It has a 200 mm Frame Size and Standard Features.
The S811T18N3S soft starter is an open soft starter designed and manufactured by Eaton Cutler-Hammer. This is a 3-pole non-combination soft starter that supports voltages of up to 600 Volts AC. It is rated at 51 kilowatts of output power at 230 Volts AC and at 90 kilowatts of output power at 380 Volts AC. The S811T18N3S soft starter incorporates solid-state technology and it benefits from many years of product research and development from Eaton. This is why this soft starter functions perfectly in all industrial settings and makes motor acceleration smooth and reliable. The Eaton S811T18N3S soft starter has the latest protection technology, including the thermal memory that prevents the device overheating due to operation at high current levels for long periods of time. It also supports stall (or jam) trips, detection of incoming line phase reversal, voltage imbalance detection, and over and under-voltage detection.
The Eaton S811T18N3S soft starter has a user-friendly HMI that is easy to use and that is a powerful configuration tool for providing maximum system performance. Besides the AC power supply, this unit needs a 24 Volts DC supply for control purposes. The whole control system adapts quickly to all motor requirements and it activates the bypass mode when the motor reaches the desired constant speed to reduce the internal heating generated by the SCRs. This feature is very important for powerful devices such as the S811T18N3S soft starter with its 180 Amps current rating. The bypass contactor provides the power supply for the motor directly from the line in these situations and it increases the system efficiency. The total weight of the device is 18.6 kilograms (41 pounds). It is an IEC, UL, CE, and CSA certified device.