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VFS High-Voltage Solid-State Soft Starter, 3-13.8 kV
Wolong VFS High-Voltage Solid-State Soft Starter, 3-13.8 kV: 200 - 50,000 kW, 3 - 13.8 kV. Quote within 24 hours.
- Genuine Wolong NanyangOriginal factory nameplate, test report and documents
- Certified for hazardous areasATEX, IECEx, CSA, EAC, CNEX and CCC certificates held by Wolong Nanyang
- Model check in 24 hoursEngineers match power, voltage, Ex marking and mounting
- Worldwide deliverySeaworthy export packing, CIF or with your forwarder
Product Description
The VFS soft starter starts large medium-voltage synchronous and asynchronous motors with patented stepped-frequency, stepless-voltage control, so the motor accelerates smoothly without electrical or mechanical shock. The technology is patented in China, the USA, Japan and Israel.
Series-connected medium-voltage thyristors with light triggering, BOD protection and self-test, together with full motor and line protection, give a reliable, compact starter. Standard and flameproof versions are available.
Key Specifications
| Series | VFS |
|---|---|
| Rated voltage | 3 - 13.8 kV |
| Rated power | 200 - 50,000 kW |
| Overload | 4 Ie for 60 s, 5 Ie for 30 s |
| Frequency | 50 Hz, 60 Hz |
| Motor | three-phase synchronous or asynchronous |
| Versions | standard and explosion-proof |
Applications
Large pumps, compressors, fans and mills in petroleum, coal, chemicals, metallurgy, mining, building materials, water conservancy and municipal utilities.
Documents Supplied
For each order we can provide the technical data sheet, outline drawing, routine test report and, for explosion-proof equipment, a copy of the Ex certificate that matches the nameplate marking. Tell us in the inquiry which documents your project or your inspector requires, so they are prepared before shipment.
Related Products
- OLI-Wolong MVE Vibration Motors, Standard & ATEX
- MVC Medium-Voltage Variable Frequency Drive, 200-15000 kVA
- High-Power Water-Cooled Frequency Converter, 5-40 MVA
Explosion Protection Explained
A flameproof enclosure ("d") withstands an internal explosion and cools the escaping gas in the flame paths, so the surrounding atmosphere is not ignited. Gas group IIA, IIB or IIC (hydrogen and acetylene) and the temperature class (T1 - T6) must match the site; EPL Gb allows Zone 1 and Zone 2.
VFS Versions
| Standard, built-in bypass | 100 - 4000 kW at 6 kV, 100 - 5000 kW at 10 kV; internal 12 kV / 630 A vacuum bypass contactor for line operation after the start |
|---|---|
| High power | 4000 - 10,000 kW at 6 kV, 5000 - 10,000 kW at 10 kV; the bypass vacuum circuit-breaker is supplied by the customer |
| Integrated cabinet | 100 - 5000 kW; incoming switch, soft starter and bypass switch in one cabinet for tight switchrooms |
| One-to-two | One soft starter starting two motors in sequence |
| SFC static frequency converter | 10 - 100 MW, 1 - 50 MVA, output 0 - 52.5 Hz; thyristor converter that accelerates large synchronous machines (pumped-storage units, gas turbines, large pump stations) from standstill to synchronisation |
General Data
| Application range | 100 kW - 50 MW, 3 - 13.8 kV, induction and synchronous motors |
|---|---|
| Overload | 400 % motor full-load current for 60 s, 500 % for 30 s |
| Supply | Works with grid frequency between 40 and 70 Hz and with diesel-generator supply |
| Harmonics | Within IEEE 519-1992 and GB/T 14549-93 during start, no filter needed |
| Ambient | Cabinet 0 to +50 °C (-20 to 0 °C with heater) |
| Altitude | Up to 2000 m, derated above |
| Control supply | 110 V AC/DC or 220 V AC/DC, 2000 VA, provided by the user |
| Cooling / protection | Natural cooling, IP4X |
| Colour | RAL 7035 standard |
Start profiles include voltage ramp, current limit and a pump curve that avoids the 3 × rated-torque peak of a direct-on-line start and the pressure surge it causes in pipelines. Stop modes are coast or soft stop. The controller has a 3.5-inch colour TFT display; the thyristor valve sets are three separate enclosed phase modules with generous current reserve for heavy and repeated starts.
Common Questions
What power range does the VFS cover?
The VFS covers 200 - 50,000 kW.
Which voltages are available for the VFS?
Rated voltage: 3 - 13.8 kV. Other voltages can be checked on request.
How to Order
For a fast, accurate quotation please send: rated power (kW), voltage and frequency, motor rating and load type, supply voltage, hazardous-area requirements, quantity and destination port. For a replacement, a photo of the old motor nameplate is the quickest way to match it. Lead time (about 80 days), documents and shipping are explained on our Export Service page.
Frequently Asked Questions
Do your explosion-proof motors have ATEX and IECEx certificates?
Yes. Wolong Nanyang explosion-proof motors, both low-voltage and high-voltage, are available with ATEX and IECEx certificates for Europe and international projects, and GOST for the Russian market. Tell us which certificate you need when you ask for a quote.
Can this motor replace my existing motor?
Yes. For new projects we quote and select the model to your requirements. For a replacement, please send a nameplate photo or outline drawing of the old motor, and we will match the shaft height, mounting and installation dimensions.
Can you supply replacements for Schorch, Brook Crompton or Morley motors?
Yes. Schorch, Brook Crompton and Morley belong to the Wolong Electric Group, and we can supply Wolong motors built to replace them, matched to your mounting dimensions.
Can you ship to my country, and what is the lead time?
Yes. We ship worldwide on CIF terms, or you can use your own forwarder. The usual production time is about 3 months, depending on the model and quantity.
What information do you need for a quotation?
Rated power (kW), voltage and frequency, number of poles or speed, Ex marking or hazardous zone, mounting type (e.g. B3, B35, V1), quantity and destination port. A nameplate photo of the old motor helps if it is a replacement.
Get a Quote for VFS High-Voltage Solid-State Soft Starter, 3-13.8 kV
Send us your requirements. An engineer will reply with a model check and price within 24 hours.
