RNMV high-voltage soft starter | motor control | 18879987699

Emil Jiangxi Electric Power Industry Co., Ltd. developed the production of high-voltage soft starter RNMV a listing on the well received by customers, and to become the Institute of the specified type, specializing in intelligent power distribution system automation equipment development, and manufacturing, with advanced equipment and scientific production processes, the development of high-voltage load switch, high voltage vacuum circuit breakers, low-voltage circuit breaker intelligent, dual power automatic transfer switch, universal frame breaker, CPS control and protection switches, instrumentation, computer integrated protection devices, motor protection rail energy meter and other products, the products have passed the relevant national testing, obtaining "CCC" certification, "CQC" certification. Built technology building, research and development centers, office automation area and standard production workshop, production line equipped with advanced testing equipment, developed a system to develop software, communication protocols, safety and reliability, performance testing and stable, and domestic famous universities SCM centers for production Gakken Commonwealth. Emil power industry is divided into four major production companies operating: Electric Automation, Inc., high-voltage electrical companies, industrial control company, low-voltage electrical company. Emil Power Industry Co., Ltd. is located in Jiangxi Pingxiang Jiangxi Province is the only home electric components manufacturers, design institutes designated models, the company provides OEM brand, the company has a strong R & D technology, national sales of products first, quality first-class, full- Net sales leader, direct selling, interested, please contact: 18879987699 QQ: 2880308219 can also visit the company's official website about the company products RNMV in www.hjgroup.org voltage soft starter is a set of motor soft start, soft stop, energy-saving light load and various protection functions in one novel motor control device called foreign Soft Starter. Soft starter with three opposite parallel thyristors as regulator, between the power supply and the motor stator to access. This circuit such as a three-phase full-controlled bridge rectifier circuit. When using the soft starter to start the motor, the output voltage of the thyristor is gradually increased, the motor accelerates gradually until full conduction thyristor motor working on the mechanical properties of the rated voltage, to achieve a smooth start to reduce the starting current, avoid starting overcurrent trip. Time until the motor reaches the rated rotation, start the process over, the soft starter has completed the task automatically replaced with thyristor bypass contactor for the normal operation of the motor rated voltage provided to reduce heat loss thyristors and prolong the life of the soft starter improve their work efficiency, but also make the grid to avoid harmonic pollution. Soft start stop function also provides a soft, soft start and soft stop opposite process, voltage decreases, the number of rotations gradually decreased to zero, to avoid torque shock caused freewheel. RNMV high-voltage soft starters start mode power supply connected in series with the alleged use of the soft starter motor between its internal control thyristor conduction angle, so that the motor input voltage is gradually increased from zero to a preset function until the end of starting give full voltage motor, that is soft start, the soft-start process, the motor starting torque is increased, speed is also increased. Soft starters generally have the following types of start-up mode. Soft start ramp Boost: The easiest way to start this, do not have the current closed-loop control, only adjust the thyristor conduction angle, and make the time to increase a certain function. The disadvantage is that, because the limited flow, motor starting, sometimes you want to have a greater impact on current thyristor damage, a greater impact on the grid, the actual rarely used. Soft start ramp Constant: This starting mode is the motor starting current is gradually increased in the initial stage of the start, when the current reaches a pre-set value remains constant (t1-t2 stage) until the starting is completed. Start the process, the current rise rate of change is adjusted according to the motor load can be set. The current rate of rise is large, the starting torque, the starting time is short. The start-up mode is the most widely used starting mode, especially for start-fan and pump loads. Kick Start: boot, that in the shortest time, so the starting current quickly reaches the set value, that is the starting step. By adjusting the starting current setpoint can achieve the effect of fast start. Shock Pulse start: Starting in the beginning stages, so that the thyristor in a very short period of time, to a greater current conduction after some time down, then set the value of the original linear increase, even the constant start. The start method, in general, less load application, suitable for heavy and large to overcome the static friction of the starting situation. Cage decompression starter motor traditional methods are Yq starters, auto decompression starter, reactor starter and so on. There are all these start-up mode decompression starting level, there are obvious disadvantages that occurred during the second starting inrush currents. Emil Jiangxi Jiangxi Province Electric Power Industry Co., Ltd. is the only home in the power electronics manufacturers, design institutes designated models, the company provides OEM brand, the company has a strong R & D technology, national sales of products first, quality first-class, full net sales leading direct selling, interested, please contact: 18879987699 QQ: 2880308219 can also visit the company's official website www.hjgroup.org soft start to understand the company's products and traditional way of starting decompression difference is: 1, no inrush currents. Soft starter when the starter motor, by gradually increasing the thyristor conduction angle, the motor starting current rises linearly from zero to the set value. 2, constant current start. Soft starters can be applied to the current closed-loop control, keep the motor constant during starting, ensure a smooth start the motor. ⑶ according to the load and power protection characteristic selection can be freely adjusted to the optimum level without starting current. Suitable for heavy and large to overcome the static friction of the starting situation. Dual voltage ramp start: In the start-up process, the output torque of the motor with the voltage increases, providing an initial starting voltage Us at startup, Us is adjustable depending on the load, the load is greater than the static friction Us transferred moment, so that the load can begin immediately rotation. Then the output voltage from the start by a certain slope Us rise (slope adjustable), the motor continues to accelerate. When the output voltage reaches up to speed voltage Ur, the motor has basically reached the rated speed. Soft starter during start-up speed automatic detection of voltage, when the motor reaches the rated speed, the output voltage reaches the rated voltage. Limit start: that is the starting process of the motor starting current limit their value does not exceed a certain set (Im) of the soft start mode. Its output voltage rises from zero rapidly, until the output current reaches a predetermined current limit Im, then maintain the output current I advantages of this approach is the starting current start small, and may need to be adjusted. Little effect on the grid, the drawback is difficult to know when starting the starting voltage, the voltage drop can not take full advantage of space. Energy-saving motors belong principle inductive load, the current lags the voltage that most appliances fall into this category. In order to improve the power factor to be used to compensate for capacitive load, synchronous motor and capacitor or compensation. Reduce motor excitation current can also improve the power factor (HPS2 saving features, at light loads to reduce the voltage, so that the excitation current is reduced, so COS∮ increase). Saving operating modes: light load to reduce the voltage to reduce the excitation current, motor current divided active component and reactive component (excitation component) increase COS∮. Run mode when the motor load is light, soft-start power-saving features in the selection of the state, PF switch thermal allocated to Y position, role in the current feedback, soft-start automatically reduces the motor voltage. Reducing the excitation component of the motor current. Thereby increasing the motor power factor (COS∮). (Homemade soft start more such function) can not implement this feature in the contactor bypass state. TPF switch provides two response time saving features; normal, slow. Energy saving operation modes: automatic energy-saving operation. (Normal, slow speed two reactions) load 40% energy saving, energy-saving load of 5%. Emil Jiangxi Jiangxi Province Electric Power Industry Co., Ltd. is the only home in the power electronics manufacturers, design institutes designated models, the company provides OEM brand, the company has a strong R & D technology, national sales of products first, quality first-class, full net sales leading direct selling, interested, please contact: 18879987699 QQ: 2880308219 can also visit the company's official website www.hjgroup.org control theory to understand the company's products through the soft-start control thyristor conduction angle to control the output voltage. Therefore, the soft starter is essentially a way to automatically control the buck starter, since the output voltage can be adjusted, for the current closed-loop control, so the buck than the traditional start-up mode (such as string resistance starts, autotransformer start etc.) has more advantages. Such as pumps, fans start full variable torque loads, to achieve a soft stop motor, the pump can be applied to completely eliminate water hammer effects. The main function of an overload protection features: Soft starter introduced a current control loop, so keep track of changes in condition to detect motor current. By increasing the overload current setting and inverse control mode, to achieve overload protection, motor overload, GTO and an alarm signal. 2, the lack of protection: at work, the soft starter detect changes in the three-phase line current at any time, once the drying occurs, you can react to the lack of protection. 3, overheating protection function: soft starter relay to detect internal heat sink temperature of the thyristor, once the heat sink temperature exceeds the allowable value of automatic turn-off thyristor, and an alarm signal. 4, the measuring circuit parameter functions: the motor working, the detector inside the soft starter has been monitoring the motor running, and monitored parameters to the CPU for processing, CPU will be monitored parameter analysis, storage and display. So soft starter motor also has a measurement circuit parameters. 5. Other features: through a combination of electronic circuits can be realized in various other interlock protection system. Emil Jiangxi Jiangxi Province Electric Power Industry Co., Ltd. is the only home in the power electronics manufacturers, design institutes designated models, the company provides OEM brand, the company has a strong R & D technology, national sales of products first, quality first-class, full net sales leading direct selling, interested, please contact: 18879987699 QQ: 2880308219 can also visit the company's official website to know our products www.hjgroup.org