
Application:
It is used for the soft start and protection of the low-voltage squirrel cage motors with power rating from 7.5kw to 500kw
Performance Characteristics:
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Multiple starting methods
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Current limit soft start, voltage index curve, voltage ramp linear curve, current index curve; Programmable kick start starting torque and starting current limit.
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Advanced communications functions
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RS485 communications interface adopted to enables the users to internet control. Built-in ModBus standard protocol adopted, easy for system configuration
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Two sets of motor control data for motors with different power ratings,making the control over two motors of different power ratings possible.
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Multiple stoppage modes Programmable soft stoppage, free stoppage, break stoppage, soft stoppage plus brake stoppage.
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Dynamic memory for system errors, up to 15 faults can be recorded, easy for trouble- shooting.
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Well-developed protection function
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Protections against overload, overheat, phase failure, power loss and micro-computer by means of feedback on current and load details.
Working Principles:
The parallel thyristors are connected into stator circuit of the low-voltage motors. Voltage drop start is achieved by adjusting the firing angle of thyristors, which is controlled by the 32-bit ARM micro-controller.
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