Description

3BSE009514R1 ABB in/out High precision diagnostic module

As shown in Figure 2, the variable frequency speed control system is composed of an industrial/variable frequency high-voltage incoming cabinet, a 12 pulse isolation transformer, an ACS1013-W1-T0 high-voltage frequency converter, a high-voltage switching cabinet, a PLC control box, and a domestically produced 2200KW motor.
1. The power frequency incoming high-voltage cabinet serves as a backup guarantee for ensuring the operation of the motor and compressor in the event of a fault in the frequency conversion circuit. Under normal circumstances, the power is supplied to the frequency converter by the frequency conversion incoming cabinet, which must be controlled by the frequency converter for opening and closing.
2. The 12 pulse isolation transformer is produced domestically and has two secondary windings, one for Y connection and the other for Δ Connection method, there is 30 between the two windings in the same phase. Phase difference. The ACS1000 frequency converter using a 12 pulse isolation transformer has met the requirements for voltage and current harmonics in IEEE519-1992 and UK G.5/3.
3. The high-voltage switching cabinet is used in conjunction with motor/frequency conversion switching. When the high-voltage vacuum contactors KM2 and KM3 are closed, the motor is Δ Connection method: At this time, the rated voltage of the motor is 3.465KV. When the motor is required to operate at power frequency, the high-voltage vacuum contactors KM1 and KM4 are closed, and the motor is connected to the power grid. It is directly started by the power frequency through the power frequency input cabinet.

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