Brand Name: SAFESAVE
Model Number: SST-N22
Input/Output power: 22kw
Rated Current: 45A
Input/Output voltage: 380v three phase
Built-in bypass: Yes
Packing Dimension: 25*13.5*18cm
G. W: 2kg
Application: Pump/Fan/Air compressor
Warranty: 18 months
Zhejiang Saikong Electrical Technology Co. , Ltd Soft starters are devices used with AC motors to temporarily reduce load and torque during start-up as compared to discrete contactor switching. Soft starters lower energy use and reduce wear and tear on motors and connected mechanical equipment. This 22kW 380v 50/60hz SST Series soft starter with built-in bypass can greatly reduce the construction cost, the rated power is 22kW, and the voltage is 380V three phase input and output.
1. Built-in bypass contactor
2. Top branded components
3. Alloyed body design with high strength.
4. Control unit with internal power-supply design
5. Set-free rapid deployment
6. Compacted size
Video of SST series soft starter
Advantages of SST series soft starter:
Along with society development, technical progress, and the revolutionary changes in the fields of domestic industrial automation control, energy-saving and emission-reduction, our R&D center of Zhejiang Saikong Electrical Co. , Ltd keeps refreshing percepts, optimizing the products. Oriented by the goal to achieve miniaturization, multi-function, digitization, network, specialization and modularization, we believe, in the very near future the new products launched by our R&D center will dominate the industry.
Q: Can soft starter replace VFD?
A: A soft starter is in the circuit for so short a time, it is not likely that the fluting is coming from the variable frequency drive. My logic is that fluting is a low current long time event. Bearing damage that could occur from the very short and very infrequent duration of starting would have to be a very high energy (for that short time), and would more likely be pitting.
Some shaft couplers are insulating; and therefore, won't drain shaft voltages.
However, all of the soft starters that I have used are line (mains) frequency phase angle modulating. Hence they act as three phase variacs (variable autotransformers). I have not run across any stray voltage problems with these units. However, some soft starters modulate only two of the three phases. I don't know what this will cause.
Regarding VFD's, three steps are needed to protect the motor: 1) High enough winding voltage withstand voltage (dielectric strength), 2) Adequate thermal capability to counter the extra (5% or so) winding heading due to the harmonics, and 3) protecting the bearings from developed stray voltage (grounding, bypassing or insulating).
Once a motor is started (softly) there is no reason to have the starter in the running circuit, so it is "removed" by a bypass (shorting) contactor. If the soft starter is used for running too, then it isn't a "starter".
Electrical parameters of SST series soft starter
|Standard||GB 14048.6-2008/IEC 60947-4-2:2002|
|Rated operational voltage||200-415V(-15%+10%)|
|Max. length between |
soft starter and cable
|Permissible ambient environment||operation: -20℃～+60℃(consider reducing capacity if >40℃)|
|Permissible installation height||5000m(start to reduce capacity for above 1000m)|
|Starting frequency||≈20 times/hour(Class10 standard load)|