Frequently asked questions about Siemens circuit breakers

FAQ 1: What is meant by the tripping class of Siemens circuit breakers? And what is the specific meaning of 10A in the parameter?

Q1: Trip class stipulates that different trip classes have different trip times when symmetrical three-phase load is set at 7.2 times of current starting from the cold state. The situation is as follows:

◆ Grade 10A trip time range is 2 to 10 seconds;

◆ Grade 10 trip time range is 4 to 10 seconds;

◆ The time range of grade 20 trip is 6 to 20 seconds;

◆ Grade 30 trip time range is 9 to 30 seconds.

FAQ 2: What is the difference between a Siemens circuit breaker 3VU13 and a 3VU16 model?

Q2: First of all, 3VU series is a compact tri-pole circuit breaker made in China. It is mainly used for motor protection, system protection, transformer protection and fuse monitoring. The 3VU series is divided into 3VU13 and 3VU16, the same size and size. The main differences between the two Siemens circuit breakers are as follows:

◆ The rated current range of 3VU13 circuit breaker is 0.1-25A, the rated current range of 3VU16 circuit breaker is 1-63A;

◆3VU13 and 3VU16 short circuit breaking ability can reach the maximum of 100kA, but 3VU16 short circuit breaking ability of the same capacity is equal to or higher than 3VU13;

◆ The width and installation depth of Siemens circuit breaker of 3VU16 are both greater than that of 3VU13;

◆ The last 3VU13 has more accessories.

Frequently asked Question 3: short circuit fault display 3VU9131-7AA00 action characteristics.

Q3:3 Vu9131-7AA00 is a short-circuit fault display which only ACTS when the Siemens circuit breaker is short-circuit. When normal opening and closing occurs, overload occurs, and tripping occurs due to TEST with the TEST button or auxiliary trip (shunt/undervoltage), the short-circuit fault display does not operate.

Frequently asked questions 4:3 VU remote control mechanism 3VU9138-1AA14 operation method.

Solution 4: specific conditions as shown in the figure below, when S1 button are A1, A2, remote operator action, and make the circuit breaker closing, the auxiliary contact 13/14 normally open contact closure, self-locking circuit state formation, need points brake can be obtained by manual break-brake local or remote electric break-brake (S0 button).

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.

FAQ 5: What models are included in the current Siemens circuit breaker 3RV series?

The RV belongs to Siemens tri-pole circuit breaker and currently includes 3RV1, 3RV2 import series and 3RV5, 3RV6 domestic series. The specific situation is shown in the figure below.

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.

FAQ 6: How to prevent illegal closing of Siemens circuit breaker 3RV series.

Q6:3 The S00-S3 handles in the RV series circuit breakers can be padlocked in the opening position to prevent illegal closing. Among them, 3RV1 series S00 is directly padlocked at the opening position, while 3RV1 series S0-S3 or other 3RV series Siemens circuit breakers need to pull out the handle locking mechanism at the opening position and re-padlock. The aperture of padlock of all specifications is between 3.5 and 4.5mm. In addition, 3VU series circuit breakers cannot lock and break without accessories, as shown in the figure below.

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.

FAQ 7: Can the Siemens circuit breaker 3RV series be used in DC systems?

Q7:3RV series circuit breakers can be used in DC systems, but the wiring and operating voltage need to be taken into account. The breaking capacity is also quite different from that used in AC systems.

Frequently asked Question 8: Two marks on the overload adjusting knob (triangle and scale) in the Siemens circuit breaker 3RV series: What does it do?

Q8: The triangle and scale lines represent the reference scale of the circuit breaker in two different installation forms, respectively. When a circuit breaker is installed in an independent manner, a scale line is used as its reference scale. When a circuit breaker is mounted side-by-side or it is plugged into a contactor, a triangle is used as the reference scale.

Different installation methods can choose the corresponding mark as the standard, the triangle and the scale line can be set within the allowed range. In addition, it should be noted that when the temperature is too high, the Siemens circuit breaker maximum setting value should be reduced accordingly.

Above is the Siemens circuit breaker FAQ, I hope to help you