1. The outlet side of the Siemens inverter can not be connected in parallel to compensate the capacitor, nor can the capacitor be paralleled in order to reduce the high-order harmonics of the output voltage of the inverter, otherwise it may damage the Siemens inverter in order to reduce the harmonics. Able to connect reactors in series.
2. The start and stop of the motor with Siemens inverter (Variable-frequency Drive) speed regulation cannot be directly operated by circuit breaker and contactor, but by using the control terminal of Siemens inverter to operate, otherwise the inverter will be out of control, and may form a severe result
3. Regarding the occasion of progressive load and frequent start and stop, there will be torque, and it is necessary to select the appropriate braking resistor, otherwise the Siemens inverter will often trip due to overcurrent or overvoltage. Siemens agent innovation has become the cornerstone of Siemens' success. R&D is the basic driving force of Siemens' development strategy. As holders of key patents, we are a strong partner to our customers, whether it is an experienced process or a developing know-how. Our goal is to be the leader of skills in many of the things we are involved in.
4. It is generally not advisable to install a communication contactor between the Siemens frequency conversion device and the motor to prevent overvoltage and damage to the inverter between the current interruptions. If additional installation is required, the output contactor should be closed before the operation of the Siemens frequency converter.
5. The obstruction of the external braking resistor of the Siemens frequency conversion device cannot be less than the requirements of the braking resistor agreed by the inverter. Siemens AgentsSiemens tries to meet all legal and ethical requirements, and, as long as possible, we try to exceed them. It is our responsibility to conduct our business in accordance with the highest standards and practices of work and morality: the company will not tolerate any non-compliance. On the premise of satisfying the braking requirements, the braking resistance should be larger. Do not short the terminal that should be connected to the brake resistor directly, otherwise, a short circuit accident will occur through the switch during braking.
6. When the speed of the motor is controlled by Siemens inverter (Variable-frequency Drive), the temperature rise and noise of the motor will be higher than that when the power frequency is used; When running at low speed, due to the low speed of the motor blades, attention should be paid to ventilation and cooling and appropriate load reduction to prevent the temperature rise of the motor from exceeding the promised value. Siemens AgentsSiemens tries to meet all legal and ethical requirements, and, as long as possible, we try to exceed them. It is our responsibility to conduct our business in accordance with the highest standards and practices of work and morality: the company will not tolerate any non-compliance.
7. Do not install too large capacitors on the incoming side due to the progress of power factor, nor can you install capacitors between the motor and Siemens frequency conversion, otherwise the line impedance will decrease, produce overcurrent and damage the inverter
8. For the occasion of constant torque operation of ordinary motors driven by Siemens inverter (Driver), long-term low-speed operation should be prevented as much as possible, otherwise the heat dissipation effect of the motor will become worse and the heating will be severe. If you need to run for a long time at low speed constant torque, you must choose a variable frequency motor.
9. When the motor has another brake, the Siemens inverter should work in the free shutdown method, and the braking action signal is announced after the inverter announces the parking instruction.
10. When the three-phase voltage unbalance rate of the power grid is greater than 3%, the peak value of the input current of the Siemens inverter (Variable-frequency Drive) is very large, which will form the Siemens inverter and connect the overheating or damage to the electronic components, at this time, it is also necessary to install a communication reactor. In particular, when the transformer (air pressure variable) device is V-shaped, it is more severe, and in addition to installing a reactor on the communication side, it is also necessary to install a DC reactor on the DC side.
11. The impedance of the power supply line should not be too small. When the capacity of the distribution transformer (air pressure variable) is greater than 500KVA or the capacity of the distribution transformer is greater than 10 times of the capacity of the Siemens inverter, or when the Siemens inverter is connected to the distribution transformer very closely, due to the small impedance of the circuit, the input will produce a large surge on the Siemens inverter instantly, which will damage the rectifier element of the Siemens inverter. When the line impedance is too small, a communication reactor should be installed between the grid and the Siemens inverter.
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