3UF5 SIMOCODE-DP System Motor Protection and Control Device

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Thermistor-Type Motor Protection Without Compromise Electrical equipment such as AC motors and transformers need protection against excessive heating. Unbalanced current consumption, phase failure or a stalled rotor are some of the possible causes of overloading. Overload protection SIMOCODE-DP protects the load, independent of the automation level, against overload, phase failure and current imbalance. The 3UF50 basic unit can also be used as an autonomous, solid-state overload relay for motor protection. Finely adjustable adaptation to start-up conditions It is possible to select a tripping class in six steps from CLASS 5 to CLASS 30. The tripping time can be finely adjusted to the start-up conditions – and the utilisation of the motors can be optimised. Built-in thermistor motor protection Thermistor motor protection is used for the thermal protection of motors. The temperature is measured directly at the motor windings via a PTC or NTC thermistor detector and is evaluated by SIMOCODE-DP.␣ No additional evaluation devices are required, thus saving space in the switchboard. Apart from binary thermistor detectors, SIMOCODE-DP also evaluates analogous (KTY) thermistor detectors. KTY detectors incorporate a resistance curve which rises linearly with the temperature. Therefore, a warning and a tripping threshold can be set in the SIMOCODE-DP. A considerable advantage. For motors with a thermally critical rotor, e.g. slipring and squirrel-cage motors with increased power, the combination of thermistor-type motor protection and electronically delayed overload relay offers full thermal protection – thermistor-type motor protection. Earth fault monitoring always available This protective function is also offered by the SIMOCODE-DP communications-capable motor protection and control device. The internal earth fault detection can be activated in addition to the thermistor evaluation. 4 For motors with 3-wire connection, fault currents which exceed the current setting I e (during nominal operation) by 30% can be detected with the internal earth fault detection. The SIMOCODE-DP system is also suitable for a precise earth fault detection. A version is available with external earth fault detection. By connecting an external summation current transformer, fault currents of 0.3 A, 0.5 A and 1 A can be detected for both 3 and 4-wire motors. An additional evaluation device is not required, and the space requirement in the cubicle is further reduced. Protection against stalled rotors Protection against the stalling of motors during normal operation is achieved by a comparison of a settable current limit. Resettable everywhere – manual, remote and automatic reset A reset at the device is implemented with the Test/Reset button. By connecting a pushbutton to the inputs, via PROFIBUS-DP or via the Test/Reset button at the operating module, a remote reset can be implemented. An automatic reset can also be configured. Reduction of variants by large setting ranges: 0.25 A – 820 A A current window from 0.25 A to 820 A is covered using only six units. This reduces product selection – and saves on spares costs. Tripping characteristics for 3-pole load Tripping time min s 120 100 50 20 10 5 2 1 50 20 10 5 2 15 10 Class 5 Class 30 25 20 0.6 1 2 5 10x I e Tripping current (Mean values) Tolerance < ± 10% With a tolerance of less than 10%, SIMOCODE-DP has an accurate tripping curve which guarantees an optimum utilisation of motors. Long-term stability also contributes to the high degree of accuracy. Cost reduction by built-in current transformers Current detection is archieved via three current transformers which are integrated in the device. This means that savings are made three ways – i.e. space, wiring and additional device requirements. Easy ‘through feed ‘connection Feeder cables up to 100 A rating can be easily connected to the 3UF50. The cables are not terminated to the device, but are fed through 3 integral conduits in the device housing – a major saving in installation time. Protection of motors in the EExe range The SIMOCODE-DP system complies to the regulations for overload protection of explosion-protected motors of the „increased safety“ type EExe DIN EN 50019/ DIN VDE0165, DIN VDE 0170/0171 and to the test regulations of the Federal Institute for Physics and Technology and the test requirements of the Federal Institute for Physics and Technology No. 3.53- 14605/96. Tripping characteristics for 2-pole load min Tripping time s 120 100 50 20 10 5 2 1 50 20 10 5 2 15 10 Class 5 Class 30 25 20 0.6 1 2 5 10x I e Tripping current (Mean values)
Wide Scope of Control Functions With the SIMOCODE-DP system nine different control functions can be implemented: • Overload relay • Direct starter • Reversing starter • Star-delta starter • Dahlander • Pole-changing switch • Slide valve (Encoder) • Solenoid valve • SIKOSTART® 3RW22 (Soft starter) In addition, permanent or nonmaintained command mode can be set. All control functions can be implemented using the 3UF50 basic unit. If more than four inputs and four outputs are required, an additional eight inputs and four outputs can be fitted by using an extension module. Cost reduction by pre-defined control functions In the SIMOCODE-DP, all necessary interlocking requirements for the relevant control function (e.g. with encoders the undelayed deactivation of the motor in case of an operation of the limit or torque switch) are implemented. This offers major advantages: • Reducing the demands put on the user program in the programmable controller, i.e. fast planning, fewer possibilities for errors, shorter program cycle times • Time-critical functions of the motor feeder are independent of the signal process time in the automation level and on the communication system. In addition, run time checks can be set for the start or stop of motors and for the slide valve control functions in between the limits. Safety by operator enable and manual/automatic switch-over In the automatic mode, control commands (e.g. ON, OFF) are transmitted to SIMOCODE-DP via the bus. Control commands from the switchgear cubicle (e.g. of the operating module) or from the local control station are only possible in this operating mode if the corresponding operator enable commands have been set. 3/N/PE~ 50/60 Hz 400/230 V L1 L2 L3 NPE Q1 1L1 2L1 1N 2N F11 Q1 RMT l > 2 3 -K1 -K2 -K3 Overload Current imbalance Phase failure Thermistor Earth fault Blocking protection Current value detection 1 A1A2 T1T2 1 2 3 4 5 230 V AC 3UF50 PROFIBUS-DP 6 7 8 9 10 11 B A SPE/PE Ready Gen. Fault Test/ Reset Switching at the cubicle door via the 3UF52 operating module ON OFF 2 3 ON OFF Local 1 1U 1V 1W M 3~ 2W 2U 2V -K1 -K2 -K3 5
Page 1 and 2: s 3UF5 SIMOCODE-DP System Motor Pro
Page 3: The 3UF5 SIMOCODE-DP System There i
Page 7 and 8: Extensive Diagnostics SIMOCODE-DP o
Page 9 and 10: The communication processors SIMOCO
Page 11 and 12: „Totally Integrated“ in SIMATIC
Page 13 and 14: L1 L2 L3 N PE 3/N/PE~ 50/60 Hz 400/
Page 15 and 16: Connection of a thermistor sensor c
Page 17 and 18: Technical Specification 3UF50 basic
Page 19 and 20: Win-SIMOCODE-DP/Professional 3UF571

3UF5 SIMOCODE-DP System Motor Protection and Control Device

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