SIRIUS 3RW5 Soft Start Applications
As discussed on our previous blog post, the SIRIUS 3RW5 Soft Starters are the best solution when direct or star-delta starting doesn’t apply to three-phase motors, because problems can often arise due to mechanical impact in the machine or voltage drops in the line supply.
The range of soft starters with intelligent functions offers a soft alternative for almost any application, from simple to sophisticated drive requirements such as heavy-duty starting. They enable you to start three-phase motors smoothly, easily, and efficiently and implement reliable machine concepts.
Here are a few examples of how the 3RW5 Soft Starters can be applied …
Condition monitoring
Example: Compressors
The evaluation of the electrical data and motor active power of the soft starters enables condition monitoring, which gives you a new type of transparency over the status of equipment. Based on the measured data you can determine whether a pump is running dry, the oil or lubricating film on compressors is wearing off, or a ball bearing is showing signs of impending damage.
Automatic parametrization
Example: Conveyor belts
The soft start-up of conveyor belts must constantly adjust to new conditions as the starting weight changes. The SIRIS 3RW5 soft starters simplify this task with their auto-parameterization function. By analysing the start-up, the soft starter identifies the load conditions and sets the appropriate values for optimally starting the belt.
Integrated brake functions
Example: A sawmill
The slow and heavy saw blades used in industrial sawing plants require a soft starting function to protect electrical and mechanical systems. At the same time, it must be possible to stop saw blades quick. Thanks to its integrated break function, the 3RW5 automatically supports DC braking and reverse braking, including the control of components such as braking contacts and reversing contactors.
Pump cleaning
Example: Wastewater
Pumps are used to convey liquids in a variety of applications. In wastewater applications, dirt and particles in the wastewater can be deposited on the pump blade wheels and reduce pumping capacity and productivity. The pump cleaning function prevents this from happening; integrated measurement technology detects the dirt and changes the pumps direction of rotation as soon as defined limit values are exceeded.
Pump stop
Example: Water supply
When pumps are used to conveyor large volumes of water in the public water supply, shutting them down is a challenge. Based on their design, these pumps stop immediately which can result in “water hammers” in pipes, couplings, valves and seals caused by the kinetic energy of the conveyed volume in the piping system. To prevent damage, the soft starters have a pump stop function that makes it possible to bring pumps to a controlled stop.
Electrical robustness
Example: Fans
Fans for air conditioning systems, buildings, tunnels, and parking garages are generally very large and heavy, which means that they sometimes require several minutes to start. This can occasionally result in supply voltage dips. Soft starters themselves require a control supply voltage of 230 V and a primary voltage of 400 V. The SIRIUS 3RW30/40/5 soft starters include wide-range voltage versions, such as 110 to 250 V AC for the 3RW52/55. This means that even in the case of a voltage dip, the soft starter and the motor and application are guaranteed to operate. Thanks to the electrical robustness of the soft starters, operation is also guaranteed in power supply networks with occasional power dips.
If you believe that the SIRIUS 3RW5 Soft Start Applications can help in your industrial workplace, call 01244 288138 or email info@dbicontrol.co.uk today.
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