VFD Starter

Model Of The Soft Starter

Data-sheet

Basic Functions

External Dimensions

External dimensions of 90kw-400kw

Please see the below table for the external and installation dimensions of WSTR3000 series 90kw-400kwsoft starter.

Connection Diagram For Main Circuit Of WSTR 3000 Soft Starter

Terminal Configuration Diagrams

Terminal diagram of the main circuit

2)Terminal diagram of the control circuit

3)Terminal connection of the control circuit

Why Choose Us

Yueqing Winston Electric CO.,LTD has made further technical improvement in both the software and the structure of the soft starter according to the market demand. The soft starter provides complete motor protection functions including start control, running and overloading, phase failure, three-phase unbalance, over-voltage, under-voltage protection and so on. As another great achievement in the intelligentization of motor protection and networked technology application, it simplifies the circuit, reduces the volume, cuts the coat, makes installation and using more convenient.

Installation direction and space: to enable good ventilation and heat dissipating conditions during using of the soft star ter, the soft starter should be installed vertically with enough space for heat dissipating left around the equipment. The allowable minimum spaces are shown in figure 2.1 and figure2.2. 

In the event that the soft starter is installed inside the cabinet, besides the above requirements, the cabinet selected should be with good ventilation at the top and bottom, as shown in figure 2.3. 

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:

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. 

About Us

● Yueqing Winston Electric Co., Ltd.  is  located in Wenzhou - the Electric Capital of China. We specialize in developing, manufacturing and distributing low voltage & high voltage electrical products.  . The products we professionally deal with are switching power supplies, sensors, relays, voltage stabilizers,  AC contactors, circuit breakers, distribution boxes, industrial plugs & sockets and others. 

● We have 3 senior engineers in our R&D dept, we design and produce all kinds of voltage transformers regulators, stabilizers rector on the basis of our customers’ specific requirements. 

● 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 will arrange the goods packaging, choose the transport routes in a fast and economical mode; Monitor all goods circulation, track and ensure the quality of transportation; provide fast, safe logistics channels.

● Winston company uses modern office software to combine work and computer technology.It break the traditional office space design, improve the efficiency and optimize the service.

FAQ

Q: Could I be your sale agent in our market?

A: It’s OK, we’ll depend on the sales turn over and also do research on your market. Let’s discuss more if you have interest.

Q：Do you have the products in stock?

A: Depends on your request, We have standard models in stock. Some special products and big order will be newly produced according to your order quantity.

Q: Is there any discount?

A: The discount will depend on the quantity you purchase.

Q: Can you accept sample order?

A: Yes, we can. Before large orders, we can provide samples for your testing. 

Q: What's your quality control system?

A: We have strict quality control system, and each product is done fatigue testing, calibration, temperature compensation before shipment. High quality is guaranteed.