Schneider ats48 soft starter repair

Snyder soft starter on the market a lot, are more representative of the ats21, ats22, ats46, ats48 series. Snyder soft starter with reliable performance, load power strong, simple wiring. Compared to Rockwell ab, abb, Eaton, the price is more close to the people some of the. In the metallurgical mining, chemical building materials, water treatment and other industries use more widely. Snyder Series soft start power: ats21 series 0.75kw-75kw ats22 series 4kw-400kw ats46 series 4kw-600kw ats48 series 4kw-1200kw soft starter works is very simple, no accuracy requirements in most states. With Europe and other countries to do the same manufacturer, meticulous, communication, remote, ats series starting torque control everything. Many friends reflect, product quality in Europe and America is no doubt, is that the program design is too complicated. I also agree with this point, but Europe is also not blindly complicated machine with no clue. Snyder's predicament function group, ABB's application macro is very convenient. Snyder good device performance, but difficult to maintain, difficult to buy yuan accessories (many models are factory oem), such as Snyder's power ic. Such a chip, you are simply finding out features and instructions, the power supply chip good can be resolved, if mcu control chip is broken, the possibility of repair on the small. However, a control chip is reflected in the strength of manufacturers, the failure rate is the lowest. Snyder Drive (atv) and soft start (ats) Power have in common, pwm controller chip is the same, with a schematic of the ic, repair inverter as reference. Failure Snyder soft start is the most prone to: inf internal fault, ocf SCR flow, pif phase sequence error, phf phase, ohf soft start overheating, ulf motor overload. Snyder's products with underrun protection, such as frequency atv61 / atv71 series. Small motors general report phase, ats series soft starters is the same, the solution is to do parameter setting, have to do with a larger motor load, there will be more trouble on the current output of the sensor around a few times more , you can also solve the problem. Phf phase divided into the line phase and output phase, in general, the line phase may be detected current is broken, as internal fault, a lot of reasons, to know the panel may also be caused by the exclusion of the fault cable After possible, we must consider the failure of the control board. Maintenance Example: The user sent a ats48m10y, sewage treatment plants with a soft start ac575v power supply, power 800kw. Symptom is normal power, reported a few minutes after starting phase fault. Due to severe corrosion conditions of the wastewater treatment plant, the first suspect poor contact. But the boot after careful observation, pcb board is not dirty, start a few minutes to appear phase, may be detected optocoupler fault, but the online test he discovered optocoupler no signs of aging, adjust parameters ull, with a small motor starts with oscilloscope input detection pulse, found a pulse at the gateway to the control panel is only slightly, exchange coupler, the fault persists, follow along the circuit, eventually found a SMD resistor increases. Analysis of reasons: It is the fault of a bad original, chip resistors are immersed resistance ceramic matrix liquid production, sewage treatment plant corrosion serious than the general environment, the resistance coating is exposed to the outside, resulting in increased resistance. Minutes failure detection signal amplitude is too small, the control chip mistaken for input phase. Renewed resistance, test detection pulse returned to normal, with a small motor is loaded one hour without failure, confirm repair.