Siemens SIRIUS 3RW40 User Manual (English)

Other manuals for Siemens SIRIUS 3RW40

Questions and Answers:

E
ejonesJul 25, 2025
What to do if there is missing load voltage or phase failure in my Siemens Controller?
- J
  Jamie GarciaJul 25, 2025
  If you're experiencing a missing load voltage or phase failure with your Siemens Controller, it could be due to several reasons. First, check if phase L1, L2, or L3 is missing or collapsing during motor operation. This can be caused by voltage dips. To resolve this, connect L1, L2, and L3 properly or correct the voltage dip. Another cause might be a motor that's too small, leading to a fault when switching to bypass mode. If the motor is using less than 10% of the soft starter's rated current, it can't be operated with the soft starter; consider using a different soft starter. Lastly, ensure that the motor phase T1, T2, and T3 are correctly connected, checking for issues like jumpers in the motor terminal box or a closed repair switch.
C
Charles BarnettJul 31, 2025
Why is my Siemens SIRIUS 3RW40 Controller showing a bypass overload?
- K
  Karen StarkJul 31, 2025
  If your Siemens Controller is experiencing a bypass overload, it means a current greater than 3.5 times the soft starter's current (Ie) is occurring for more than 60 milliseconds in bypass mode. This can happen if the motor is blocked. To solve this, check the motor and load, and also verify the soft starter's dimensions.
O
Olivia GarciaAug 6, 2025
How to fix impermissible electronics supply voltage on a Siemens SIRIUS 3RW40 Controller?
- M
  mcdonaldpamelaAug 7, 2025
  If your Siemens Controller is showing an impermissible electronics supply voltage, it's likely because the control supply voltage doesn't match the soft starter's rated voltage. Check the control supply voltage, as a power failure or voltage dip could be the cause.
L
Lori CookAug 12, 2025
What to do if Siemens Controller has a missing load voltage or phase failure?
- L
  Leslie ObrienAug 12, 2025
  If your Siemens Controller experiences a missing load voltage or phase failure, several issues could be the cause. First, check if phase L1, L2, or L3 is missing at the start of soft starting or fails during motor operation; if so, connect L1, L2, or L3, or correct any voltage dips. Second, ensure that the connected motor has sufficient power; if not, connect a motor with a higher rated operational current or select a different soft starter. Finally, verify that motor phase T1, T2, or T3 is properly connected, ensuring jumpers in the motor terminal box are correctly configured and any repair switches are closed.
T
Tammy SmithAug 19, 2025
What to do if my Siemens SIRIUS 3RW40 Controller shows impermissible electronics supply voltage?
- M
  mrogersAug 19, 2025
  If your Siemens Controller displays an impermissible electronics supply voltage, it means the control supply voltage does not match the soft starter's rated voltage. You should check the control supply voltage, as the incorrect voltage could stem from a power failure or a voltage dip.

Siemens SIRIUS 3RW40 Specifications

General

Product category	Soft starter
Product designation	SIRIUS 3RW40
Protection Class	IP20
Control Voltage	24 V AC/DC
Mounting type	DIN rail or screw mounting
Functionality	Soft start, soft stop, pump control
Ambient temperature range	-25 ... +60 °C
Standards	UL 508, CSA 22.2 No. 14
Voltage Range	200V - 690V