The structure design and function application of Siemens soft starter 3RW52

The structure design of Siemens soft starter 3RW52

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

1. Main circuit connection (main power supply);

2. Slot for standard 3RW5 HMI or high-performance 3RW5 HMI (attachment);

3. Standard 3RW5 HMI or high-performance 3RW5 HMI (attachment) interface;

4. Setting items for parameter allocation;

5. Mode key;

6. 3RW5 communication module slot (attachment);

7. Cross section of connectable wire;

8. Set the scale of Ie;

9. Diagnosis LED and reset key;

10. Lead sealing hole;

11. Main circuit connection (motor);

12. Control terminal (input/output);

13. Control cable channel.

Siemens soft starter 3RW52 specific functions

◆ Soft starting function

Working principle: Voltage ramp is used for soft starting. Siemens soft starter 3RW52 can increase the motor voltage from the parameterized start voltage to the line voltage within a definable ramp time.

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Voltage ramp within short ramp time T1;

(2) Voltage ramp within long ramp time T2;

Urated line voltage;

Us parameterizable starting voltage;

T1 short slanting lift time;

T2 long oblique rise time.

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Direct starting torque (not using 3RW52 Siemens soft starter);

Short diagonal lifting time torque;

Long slanting lift time torque;

Load torque;

(5)Acceleration torque = the difference between starting torque and load torque.

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Current characteristics during direct starting (not using 3RW52 Siemens soft starter);

(2) Current characteristics of short diagonal rise time;

Long slanting lift time current characteristics;

Ie rated operating current;

Ne rated motor speed.

◆ Current limiting function function

How it works: To ensure that the motor starting device does not exceed a specific current value, then the current limiting function needs to be activated. When the motor is started, the voltage ramp always rises. Before the circuit exceeds the parameterized current limit *Ie, the voltage ramp function will stop and the current limit function will start. If the motor current falls below the limit again, the voltage ramp function will be controlled again until the motor starts.

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

I direct starting motor;

I soft starter: Adjustable current limiting value;

Voltage ramp.

◆ Soft parking function

Working principle: Siemens soft starter voltage ramp is used to realize soft shutdown. Through the shutdown function based on ramp, motor voltage along the line and negative voltage ramp drop.

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

t1 ... T2 diagonal descent time;

Urated line voltage.

◆ Motor protection function

3RW52 soft starter has two motor protection functions, one is electronic motor overload protection and the other is thermosensitive motor protection using temperature sensor (optional). The combination of the two functions can achieve all-round motor protection.

Electronic motor overload protection works by using the measured motor current and parameters to set the rated operating current Ie, and the grade (trip grade) to calculate the approximate temperature of the motor. In this way, it can be determined whether the motor is overloaded or operates within the normal operating range. If overload is detected, Siemens soft starter 3RW52 will shut down the motor, and the reset mode will determine the mode of motor restart.

Recovery time after motor overload protection tripping: When motor overload protection tripping and automatic reset mode is set, the fault will automatically reset after 5 minutes of recovery time. If the soft starter chooses manual or remote reset, the reset can only be completed after a recovery time lasting 5 minutes.

Using a thermistor temperature sensor motor protection (optional) working principle: the motor temperature sensors can be connected to the soft starter and assessed, if more than a specific motor temperature, soft starter will identify this kind of situation, and made the corresponding responses, but also can monitor the sensor cable open circuit and short circuit conditions.

Two different types of measurement sensors can be connected to the soft starter:

1. Type A PTC thermistor, the sensor is A temperature dependent switch.

2. Thermosensitive switch. This sensor is a temperature-dependent resistance.

When the thermistor motor protection trips, the Siemens soft starter 3RW52 cannot be restarted before the sensor installed in the motor cools down. The exact recovery time varies with the temperature state of the sensor.

◆ Self-protection function of the equipment

Integrated device self-protection prevents power semiconductor and bypass contacts from overloading unpermitted, producing a message on the soft starter if the warning threshold is exceeded, and shutting down the soft starter automatically if the fault threshold is exceeded.

Recovery time after device protection is triggered: If the Siemens soft starter 3RW52 is shut down due to motor overload protection or device self-protection tripping, you must wait for the set cooling time (recovery time) to confirm the failure or restart the motor. When power semiconductor overload occurs: 30 seconds, when bypass overload occurs: 60 seconds.

◆ Soft torque function

How soft torque works during startup: The soft torque function quickly reduces the drive acceleration rate before the motor reaches its rated speed, generating an approximate linear speed curve. This, for example, helps ensure the smooth movement of the conveyor belt, thus preventing fragile items from falling off.

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Torque without soft torque;

(2) Torque with soft torque;

Direct starting torque

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Rated speed of Ne motor;

(1) Motor speed without soft torque;

(2) Motor speed with soft torque.

Siemens soft starter 3RW52 application area/Load type

The starting motor may cause a rapid change in load current, and the resulting impact torque will exert greater pressure on the mechanical parts of the machine or equipment. In addition, voltage sag may occur in the power system, which will have a negative impact on other equipment.

● Lights flicker;

● Affecting computer systems;

● The contactor is disconnected from the relay.

The Siemens soft starter 3RW52 continuously controls the voltage, thereby continuously increasing the torque and current, effectively preventing peak load on the power system and damage to the drive chain.

● Smooth start/stop, e.g. conveyor belt;

● No pressure fluctuations, such as pumps;

● Extend the service life of piping systems, such as compressors;

● Reduce the starting current, such as a blender;

● Reduce pressure on gearboxes and triangular belts, e.g. saws.

Above is the structural design and functional application of Siemens soft starter 3RW52, I hope to help you.Okplazas.com is a professional agent for the sale of Siemens products. You are welcome to consult [email protected]. At the same time, you can also contact WeChat customer service +86-13689242098 for product consultation.