IS215ACLEH1AB
IS215ACLEH1AB
IS215ACLEH1AB
connected to the power supply like burp.
Abbdcs550 is abb’s upgrade board on the basis of dcs400 series governor. The hardware changes are not much, but the software is very different. The application of software is closer to dcs800 series products. The Dcs550 governor also optimizes some of the hardware that can be easily damaged on the dcs400 governor, such as the sampling resistance, such as the simplification of the excitation control circuit. Software also began to support excitation control on and off function, which is a complete blessing for maintenance personnel.
Case: A customer in Central China sent an abbdcs550 (900 amp) DC governor for repair, and the fault phenomenon was alarm over voltage and output pulse loss during operation. At first glance, it is impossible for a single device to report so many faults at once, but after careful analysis, it tells the customer that phase output is the most likely.
My analysis is as follows: the response of overcurrent and overcurrent pressure on the DC governor is the output instability, and the protection of the pulse is missing, which exactly corresponds to the output instability fault. According to the experience of repairing abbdcs series governor, the output is not stable, but also scores heavy and light load! ? If the heavy load output is unstable, the fault usually occurs in the power drive before and after stage or power module; If the light load output is not stable, (even flying car) fault is generally in the motor feedback circuit. Because the
