SEW MOVITRAC ® B frequency converter

SEW MOVITRAC ®  B frequency converter

Product Overview and Safety Foundation

MOVITRAC ®  The B frequency converter provides various power levels from 0.25kW to 75kW, covering multiple specifications from 0XS to 5, and can adapt to AC 230V single-phase/three-phase or AC 400/500V three-phase power inputs, meeting diverse market demands. Its standard configuration complies with multiple international certifications such as CE, UL, CSA, etc., especially in terms of electromagnetic compatibility (EMC). With the correct installation method, it can achieve the C1 or C2 interference radiation limit level in EN 61800-3 standard.

Safety is the primary prerequisite for all industrial operations. The design and use of this frequency converter must strictly comply with relevant international electrical standards (such as IEC 60364, IEC 60664). The operation manual categorizes safety prompts into different levels such as "danger", "warning", "caution", etc., clearly indicating the consequences that may result from non-compliance. The core security principles include:

Clear objective: All transportation, installation, commissioning, and maintenance work must be carried out by qualified electrical professionals.

According to regulations: The frequency converter should be integrated into electrical equipment or machines that comply with the EU Machinery Directive (98/37/EC) and comply with the requirements of the EMC Directive. It should be noted that without a higher-level security system, MOVITRAC ®  B itself does not have security functions, and for dangerous applications involving lifting, an independent security monitoring system must be additionally configured.

Power outage and protection: Before operating live equipment, it is necessary to cut off the power and wait for the capacitor to discharge. The LED turning off after a power outage does not mean there is no power at all, additional protective measures must be taken. All power terminals must be equipped with contact protection devices that comply with regulations before they can operate.

Rigorous installation and electrical connection

The installation quality of a frequency converter directly affects its heat dissipation, electromagnetic compatibility, and long-term stability. The manual has detailed regulations on this.

Installation environment and spacing: It must be installed vertically to facilitate heat dissipation. To ensure effective cooling, a gap of at least 100mm should be left above and below the equipment, and the side can be installed tightly. The installation surface should be flat to ensure good contact. When installing on a cooling plate to adapt to narrow spaces, there are strict requirements for the flatness of the contact surface and installation torque.

EMC (Electromagnetic Compatibility) installation: This is the core difficulty of installation. The key measures include:

Shield all outgoing cables (excluding power cords).

Use shielded motor cables or install output chokes (HD) to limit radiated interference.

Reliable grounding of the frequency converter and all high-frequency equipment through the conductive parts of the installation surface.

Strong current cables and control cables should be laid in separate slots and isolated from each other.

For ungrounded IT networks, it is recommended to turn off the EMC capacitors of specification 0 devices and consider using pulse code measurement for insulation monitoring.

Wiring specifications:

Power supply and motor: According to the equipment specifications, connect the power supply through terminal X1, and connect the motor and brake through X2 (or X3). The cross-sectional area of the wire should be selected according to the rated current.

Braking resistor: When connected to the braking terminal, the wire should be as short and shielded as possible. Overheating protection must be configured, and for the BW... - T series, its internal temperature switch can be used; For the regular BW series, an external bimetallic relay is required. When braking, there is high DC voltage and extremely high surface temperature, so special attention should be paid to the installation position and protection.

Control circuit: Terminal X10 is an analog input, X12 is a binary input, and X13 is a binary output. A screwdriver with a width of 2.5mm should be used for wiring. For switch signals, it is recommended to use dual core shielded copper cables.

Safety function: Equipment with safety stop (S0) model, connected through X17 terminal, but it must be emphasized that its safety function relies entirely on the correct design and implementation of the higher-level safety system, and the frequency converter itself is not a safety component.

Systematic debugging process

MOVITRAC ®  B supports debugging through various methods, including option operation panel FBG11B/DBG60B, computer software MOVITOOLS ®  MotionStudio and external potentiometers or communication interfaces. Before debugging, it is necessary to complete the mechanical and electrical connections, and ensure that the drive device is in a prohibited state, taking measures to prevent accidental start-up.