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Bsumwell Company

Q Major Overseas Markets

A Bsumwell's main overseas markets include Europe and North America. The company continuously expands its market share by participating in international trade shows and establishing a network of overseas agents, gaining the trust and cooperation of numerous international clients.
Q Main Business

A Bsumwell primarily offers high-quality waterproof electrical products and smart home solutions. The product range includes waterproof junction boxes, waterproof sockets, smart locks, and smart monitoring devices. The company also provides customization services, allowing for tailored product design and manufacturing based on specific customer needs.
Q Variable Frequency Drive Wiring Accessories

A MCCB (molded case circuit breaker)
Do not use a circuit breaker for start/stop operation. When a ground fault interrupter is used, select the one with no influence for high frequency. Setting current should be 200mA or above and the operating time at 0.1 second or longer to prevent malfunction.

MC (magnetic contactor)
It is not always necessary to have the MC on the input side. However, an input MC can be used to prevent an automatic restart after recovery from an external power loss during remote control operation. Do not use the MC for start/stop operation.

AC REACTOR
When power capacity is significantly large compared to inverter capacity, or when the power factor needs to be improved, externally connect an AC reactor. Many VFD manufacturers install reactors in the drives. It is always a good idea to check.

Input Noise Filter
To comply with certain communication and interference regulations, input noise filters are to be installed. Many manufacturers include these filters.

Variable Frequency Drive
Wire input to terminals L1, L2 and L3 for three phase input. Make sure to connect the ground terminal to an appropriate safety ground.

Output Noise Filter (EMI Suppression)
When used with output noise filter, radiated and conducted emissions may be reduced. dT/dV filters protect motors from EMI and voltage transients output from the drive itself. Not required if the motor is inverter rated.

Motor
When multiple motors are driven in parallel with an VFD, the VFD rated current should be at least 1.1 times the total motor rated current. Make sure that the motor and the variable frequency drives are separately grounded.