Model Of The Soft Starter
Rated motor power
Please refer to
Meet the standards
Three phase power supply
AC 380V(optional 220V and 660V)
Squirrel cage three-phase asynchronous motor
When the motor is fully loaded, no more than 4 times per hour, no load or light load, no more than 10 times per hour.
At an altitude of 3000 below ground gas, the vibration stresses below 0.5G
93% no condensation or drop
Natural cold wind
Relative to vertical
Vertical installation, angle range
External dimensions of 90kw-400kw
Please see the below table for the external and installation dimensions of WSTR3000 series 90kw-400kwsoft starter.
Rated power (KW)
Terminal Configuration Diagrams
Terminal diagram of the main circuit
|1) WSTR3005-3075||WSTR 3090-3400|
2)Terminal diagram of the control circuit
3)Terminal connection of the control circuit
Why Choose Us
Connection of the main circuit and the grounding terminal
(I) Main circuit power input terminal (R,S, T)
a.Connect the main circuit input terminals R, S, T to the three-phase AC power through the circuit breaker for circuit protection or circuit breaker with leakage protection without considering the connection sequence
b.Do not use ON/OFF of the main circuit power to control running and stop of the soft starter, instead, such should be controlled by means of the control terminal or RUN and STOP buttons in the keyboard panel of the soft starter upon power on.
c.Do not connect the soft starter to the single-phase power.
(2) Output terminals of the soft starter (U ,V ,W )
a.Output terminals of the soft starter should be connected to the three-phase motor in correct phase sequence. If the rotation direction of the motor is incorrect, switch connection of any two phases among U, V and W.
b.The output end of the soft starter shall not be connected to capacitor or surge absorber.
c.If the wire between the soft starter and the motor is very long, the distributed capacitance between the wires will generate highfrequency current which may cause over-current tripping, leakage current increasing and poor current display precision of the soft starter. Therefore, it is suggested that the motor connection wire should be no more than 50m.
(3) Grounding terminal of the soft starter (〨 G)
a.For safety and noise reducing, the grounding terminal G of the soft starter must be well-grounded. To prevent electric shock and fire accidents, the metal enclosure and frame of the electric equipment should comply with the requirements of the national electronic procedures.
Description Of Protection Functions
WSTR 3000 series soft starter possesses complete protection functions to protect the operation security of the soft starter and the motor. During operation, the protection level and protection parameters should be properly set base don different circumstances.
● Over-heating protection of the soft starter: the protection will start when the temperature rises to 80℃±5℃, and it will stop when the temperature falls to 55℃(lowest).
● Delayed time of input phase loss protection: <3s.
● Delayed time of output phase loss protection: <3s.
● Delayed time of input three-phase unbalance protection: <3s. Taking the deviation of current in each phase is over 50%10% as the criteria, when the load current is less than 30% of the nominal rated value of the soft starter, it is confirmed that the deviation will increase.
● Protection time of over-current during starting: the protection time shall be continued to be longer than 5 times of the maximum operating current of code F5,
● Delayed time for power under-voltage protection: when the power voltage is under the extreme value 40%, the protection time< 0.5s, when the power voltage is below the set value, the protection time< 3s.
● Delayed time for power over voltage protection: when the power voltage is over the extreme value 130%, the protection time< 0.5s, when the power voltage is over the set value, the protection time< 3s.
● Delayed time for load short circuit protection < 0.1 s, if the current is more than IO times of the nominal rated value of the soft starter, this protection shall not replace the fuse or short circuit protection device.
The above time parameters are the periods from the valid signal being detected to the tripping protection directive being given; these parameters are for information only. In the event that the protection functions of the soft starter fails to meet the requirements of customers, special protection devices should be installed to ensure the safety.
MODBUS Communication Protocol
Modbus is a kind of serial asynchronous communication protocol with RS485 as the physical interface. Being designed for Modicon PLC, it has the structural features of PLC. In network control, it can read and write the PRS 3000 as if it were a PLC. It can project the start and stop control, status information (current, fault etc.) and function parameters to the holding register (4:XXX). Its read and write control shall be conducted through the PL master station. When connected to other Modbus equipment, connection should be conducted as per the diagram below:
WSTR 3000 series soft starter possesses complete protection functions to protect the operation security of the soft starter and the motor. Here is Motor thermal protection tripping time curve based on IEC60947-4-2 standard is shown as follows:
WSTRD series Motor Starter has a Chinese & English LCD display to real-time display current, voltage and other operating status. The help information can be assessed when the soft starter is not in the soft start/ soft stop status or the setting status; press Yes(button for confirmation), then press the up/down buttons to read the prompt messages.
Four-digit voltmeter, used to test the voltage of the three phase AC power
Indicate the specification of the soft starter
Indicate that the latest fault information is zero
Indicates no occurred fault information
Indicates the occurred fault information Err0r06
indicates no fault information
Indicates the software version of the product is Ver4. 2
The total times of successful starting
Time used in last soft start(whether succeed or not)
Note: HI-H9 saves the recent 9 fault information in the recursive method
● Yueqing Winston is a known brand, a leading manufacturer and exporter for off-grid which has been this industry for 10 years. Our factory was established in 2010. We provide power solution service to our clients. All of our customers are located all over the world and they are very satisfied due to our excellent price-quality ratio.
● With special cultivation of employees, high investment on production facilities and R&D as well as a wide range of products, we advocate "technology innovation, business honesty and trust and quality first" as our basic principle, trying to develop into a world-class electrical manufacturer with constant efforts.
● One years’ guarantee for free from the date of delivery . Besides, any of the spare parts can be supplied , during the guarantee period and after the guarantee period.If you have any questions, please contact our customer service.
● We are an ISO9001:2000 certified company. We have obtained many certificates, such as CCC, CE, CB, GS and RoHS. Stability, expertise and technological innovation are the core stones of our business strategy. Aiming at reliable product quality and the highest customer satisfaction, we are consistently deepening enterprise inner reform and fully carry out a quality guarantee system.
● Mainly occupied the international market. Exported to Southeast Asia , Europe ,North America , Australia ,Middle East and other countries and regions ,enjoy a high reputation in the world.
Q: I can’t find the product on your catalogue, can you make this product for me?
A: Our catalogue shows most of our products, but not all.So just let us know what product do you need, and how many do you want. If we do not have it, we can also design and make a new mould to produce it. For your reference,making a ordinary mold will take about 35-45 days.
Q: Do you offer a catalog?
A: Yes. you can email us at email@example.com with your mailing address and catalog request in the subject line of the email.
Q: What's your warranty ?
A: Two years
Q: Can I become an Agent / Dealer of products?
A: Welcome! But please let me know your Country/Area first,We will have a check and then talk about this.If you want any other kind of cooperation,do not hesitate to contact us.
Q: Can I get frequency soft starter samples?
A: Yes, we can offer samples and refund the sample fee when place order formally but freight is on you.