Siemens Sirius Soft Starter 3RW44 failure
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Siemens Soft Starter Problem. (follow the manual), such that there is no driving voltage for the coil of a bypass contactor. A last option could be to request. Pdf reader install.
- Local soft start process 76 Local soft stop process 76 Upon fault condition 77 Remote soft start process (optional) 77 Soft start process through communication (optional) 77 Emergency bypass process 77 Low-voltage test procedure 78 Notes and warnings 78 Soft starter - preparations for insulation resistance test - three phases connected together.
- Download the Siemens Sirius Soft Starter 3RW40 Manual from the link below:- Siemens Sirius 3RW30/3RW40 Soft Starter Manual (6.8 MB) Soft Starter Trip Class Guide (61 kB).
- Siemens Industry Catalog - Automation technology - Industrial controls - Switching devices - Soft starters and solid-state switching devices - Class 72G Hydraulic Elevator Starters. As an already registered user simply enter your userame and password in the login page in the appropriate fields.
Siemens Sirius Soft Starter 3RW44 failure
Siemens Soft Start Troubleshooting
We have a Siemens Sirius Soft Starter 3RW44 supplied as part of a pump system. The 3RW44 soft start is connected to a Siemens 230 kw motor (, 60 Hz, 380 volt, 415A on the plate). The motor is mounted and connected to a floating pump (chain drive).
We have a 750 KVA Doosen generator connected to a Marelli power unit as the power source. This is enough power to operate a 230 kva motor during soft start.
Commissioning of this 3RW44 has failed despite 3 visits from Siemens to calibrate the soft starter 3RW44 with the Siemens motor. We have had this unresolved problem going for 5 months now and the Siemens experts are unable to offer a solution to date. We are a new shrimp farm in Saudi Arabia and with no pump there is no farm.
On the final switch over to full motor (and therefore pump) operation the softstart 3RW44 shuts the whole thing down. We have two identical pumps, motors and soft starters and both shut down in this way. We have tried slow ramp up, fast ramp-up and always at the end of the soft starter cycle, the sofstarter shuts down and stops the motor. The soft start message says it registered high voltage to the soft starter unit. The software settings of the 3RW44 do not include a way to alter or override this message.
On a slow ramp up, you can hear the generator slowly picking up load, but at no time does the generator sound overloaded. Then at the switchover to full pump operation, the soft starter stops the motor.
Siemens has failed to provide a solution. There is a simple solution somehwere here and I hope somebody on this forum has it.
Strangely, the one pump did start perfectly and run once for 30 minutes. However after shutting down and then changing 2 Amp fuses to the softstart 3RW44 neither units could be started again. These 2 Amp fuses kept blowing and Siemens instructed we use 6 Amp fuses later.
I have personally witnessed about 60 or more startup attempts.
The pump is suited to a 230 kva motor, so it is not the pump and it is not the water head either.
I would welcome a solution if possible. We have a case here of technology defeating humans!
We have a 750 KVA Doosen generator connected to a Marelli power unit as the power source. This is enough power to operate a 230 kva motor during soft start.
Commissioning of this 3RW44 has failed despite 3 visits from Siemens to calibrate the soft starter 3RW44 with the Siemens motor. We have had this unresolved problem going for 5 months now and the Siemens experts are unable to offer a solution to date. We are a new shrimp farm in Saudi Arabia and with no pump there is no farm.
On the final switch over to full motor (and therefore pump) operation the softstart 3RW44 shuts the whole thing down. We have two identical pumps, motors and soft starters and both shut down in this way. We have tried slow ramp up, fast ramp-up and always at the end of the soft starter cycle, the sofstarter shuts down and stops the motor. The soft start message says it registered high voltage to the soft starter unit. The software settings of the 3RW44 do not include a way to alter or override this message.
On a slow ramp up, you can hear the generator slowly picking up load, but at no time does the generator sound overloaded. Then at the switchover to full pump operation, the soft starter stops the motor.
Siemens has failed to provide a solution. There is a simple solution somehwere here and I hope somebody on this forum has it.
Strangely, the one pump did start perfectly and run once for 30 minutes. However after shutting down and then changing 2 Amp fuses to the softstart 3RW44 neither units could be started again. These 2 Amp fuses kept blowing and Siemens instructed we use 6 Amp fuses later.
I have personally witnessed about 60 or more startup attempts.
The pump is suited to a 230 kva motor, so it is not the pump and it is not the water head either.
I would welcome a solution if possible. We have a case here of technology defeating humans!