Motor soft starters

[Introduction] JRD-RQ series soft starter is not exactly advanced processor core, control power thyristor assembly having a limit start, voltage ramp start, soft stop function parameters can set their own load, and over-current, overload, phase loss protection. Soft starter output voltage is set by law increased, so that the motor torque controlled by the optimized acceleration curve starting process is completed, the turn-off thyristor module, working from the bypass AC contactor. [Features] ◆ intelligent soft-start digital, single-chip closed-loop control; ◆ advanced soft start controlling a voltage-controlled current limiting b; ◆ Stop mode: soft parking and free parking; ◆ start time, stop time, The starting voltage can be set flexibly according to the load through the panel; ◆ no phase sequence of input power requirements; ◆ with the flow, overload, overheating, three-phase AC imbalance, lack of equal variety protection; ◆ the motor provides a smooth and gradual Starting the process, reduce the starting current impact of the grid, to reduce the vibration and noise of equipment, extend the service life of mechanical transmission, and improved working environment of workers; ◆ load current can be adjusted according to starting and reduce losses start to a minimum current generating optimum torque; ◆ convenient external control interface with multiple functions: an array of extended start control; instantaneous stop control input; start delay relay output; fault relay output; ◆ comes with a standard 485; ◆ 0- 20ma standard analog current output; ◆ new product structure, small size, reliable performance, installation, operation is simple to use; ◆ Harvard-style single-chip has a strong anti-jamming capability, protection and control systems from strong electrical interference. Typical applications Introduction ◆ pump use of the pump control function, when start and stop, reduce the liquid pump water hammer phenomenon generated by the impact, saving system maintenance costs; ◆ mill using the voltage ramp start, reducing wear gear torque, reduced maintenance workload, saving time and saving costs; ◆ fan soft start to replace traditional starter to reduce belt wear and tear of mechanical shock, savings in maintenance costs ◆ compressor limiting use to achieve a smooth start, reduce motor heating prolong life; ◆ crusher use stall protection box fast protection against mechanical failure or obstruction caused by motor overheating and burning; ◆ conveyor soft start and preset low speed to achieve a smooth, gradual start the process, avoid moving and overflow object on the conveyor belt. Technical indicators and conditions of use ◆ Power supply: Three-phase AC380V (± 10%), 50HZ; ◆ Applicable motor: 500KW in the following squirrel cage induction motor; ◆ start voltage: (30% -70%) 380V; ◆ soft From Time: 0-60 seconds; ◆ soft stop time: 0-60 seconds; ◆ start limiting: limiting range 1-4.5 times the rated current; ◆ control: keyboard, external control options in two ways; ◆ start frequency : standard product recommendation per hour evenly spaced no more than 10 times; ◆ Cooling: natural cold; ◆ conditions: when the soft starter connected with the use of English bypass contactor; ◆ Protection grade: IP20; ◆ Seismic capacity: Altitude 3000 meters below, a vibration device 0.5G or less; ◆ Ambient temperature: - 30-55 ℃; ◆ Humidity: 95% without condensation or dripping water; ◆ use: indoor non-corrosive gases, no conductive dust and well ventilated.