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3RK1400 Datasheet(PDF) 11 Page - List of Unclassifed Manufacturers |
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3RK1400 Datasheet(HTML) 11 Page - List of Unclassifed Manufacturers |
11 / 114 page SIMOCODE 3UF Motor Management and Control Devices 7/11 Siemens LV 1 T · 2006 SIMOCODE pro 3UF7 motor management and control devices ■Function Multifunctional, solid-state full motor protection Current-dependent electronic overload protection with adjustable tripping characteristics (Classes 5, 10, 15, 20, 25, 30, 35 and 40) • SIMOCODE pro protects three-phase or AC motors according to IEC 60947-4-1 requirements. The trip class can be adjusted in eight steps from Class 5 to Class 40. In this way, the break time can be adapted very accurately to the load torque which allows the motor to be utilized more effectively. In addition, the time until the overload tripping operation is performed is calculated and can be made available to the I&C system. After an overload tripping operation, the remaining cooling time can be displayed (characteristic curves for 2-pole and 3-pole loading in SIMOCODE pro System Manual). Phase failure/unbalance protection • The level of the phase unbalance can be monitored and trans- mitted to the I&C system. If a specified limit value is violated, a defined and delayable response can be initiated. If the phase unbalance is larger than 50 %, the tripping time is also automatically reduced according to the overload characteris- tic since the heat generation of the motors increases in unbal- anced conditions. Stall protection • If the motor current rises above an adjustable blocking threshold (current threshold), a defined and delayable response can be configured for SIMOCODE pro. In this case, for example, the motor can be shut down independent of the overload protection. The blocking protection is only enabled after the configured class time has elapsed and avoids unnecessarily high thermal and mechanical loads as well as wear of the motor. Thermistor motor protection • This protection function is based on direct temperature measurements by means of temperature sensors in the stator windings or in the enclosure of the motor. These protective functions should be used, in particular, in motors with high operating frequencies, heavy-duty starting, intermittent and/or braking operation, but also in the case of speeds lower than the rated speed. SIMOCODE pro supports connection and evaluation of several PTC sensors connected in series on the basic unit. In addition, the sensor measuring circuit can be monitored for short-circuits and wire breakages. If the temperature of the motor increases beyond a defined limit or if there is a fault in the sensor measuring circuit, a defined response can be configured. Ground-fault monitoring (internally) with a current measuring module or current/voltage measuring module • SIMOCODE pro acquires and monitors all three phase currents. With vector addition of the phase currents, the motor feeder can be monitored for possible fault currents or ground faults with the help of internal calculations. Internal earth fault monitoring is only available for motors with three-phase connections in directly grounded networks or in networks grounded with low impedance. The response of SIMOCODE pro when a ground fault is detected can be parameterized and delayed as required. Ground-fault monitoring (external) with summation current transformer1)2) • External ground-fault monitoring is normally implemented for networks that are grounded with high impedance. Using an additional summation current transformer (3UL2 20.-.A), even extremely low ground-fault currents can be measured. The response of SIMOCODE pro when a ground fault is detected can be parameterized and delayed as required. Fault current measurement is performed for each summation current transformer for the following fault currents: 0.3/0.5/1 A Monitoring of adjustable limit values for the motor current • Current limit value monitoring is used for process monitoring independent of overload protection. Violation of a current limit value below the overload threshold can be an indication for a dirty filter in a pump or for an increasingly sluggish motor bearing, for example. Violation of the lower current limit value can be a first indication of a worn drive belt. SIMOCODE pro supports two-step monitoring of the motor current for freely selectable upper and lower current limit values. The response of SIMOCODE pro can be freely configured and delayed if it reaches an alarm or tripping threshold. Voltage monitoring3) • By measuring the voltage directly at the circuit-breaker or at the fuses in the main circuit, even when the motor is deactivated, SIMOCODE pro can also obtain information about the reclosing capability of the feeder and signal it if required. • SIMOCODE pro supports two-stage undervoltage monitoring for freely selectable limit values. The response of SIMOCODE pro can be freely configured and delayed if it reaches an alarm or tripping threshold. Monitoring the active power3) • The active power characteristic of a motor provides an accurate statement of the actual loading over the complete range. Excessive loading will cause increased wear in the motor and can result in early failure. Insufficient active power can be an indication of, for example, motor idling. • SIMOCODE pro supports two-step monitoring of the active power for freely selectable upper and lower current limit values. The response of SIMOCODE pro can be freely configured and delayed if it reaches an alarm or tripping threshold. Monitoring the power factor3) • Especially in the low-end performance range of a motor, the power factor varies more than the motor current or active power. Monitoring of the power factor is therefore particularly useful for distinguishing between motor idling and fault events such as a tear in a drive belt or a crack in a drive shaft. • SIMOCODE pro supports two-stage monitoring of power factor undershoot for freely selectable limit values. The response of SIMOCODE pro can be freely configured and delayed if it reaches an alarm or tripping threshold. Temperature monitoring1)4) • The temperature can be monitored, for example, in the motor windings or at the bearings through up to three resistance sensors connected to the temperature module. • SIMOCODE pro supports two-stage monitoring of overheating for freely selectable limit values. The response of SIMOCODE pro can be freely configured and delayed if it reaches an alarm or tripping threshold. Temperature monitoring is always performed with reference to the highest temperature of all sensor measuring circuits used. 1) Using basic unit 2. 2) An additional ground-fault module with a 3UL22 summation current transformer is required. 3) Using basic unit 2 with current/voltage measuring module. 4) An additional temperature module is required. |
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