VKS-8000 Bypass Soft Starter
VKS8000 is a soft starter with a built-in bypass contactor for controlled motor starting and stopping. It should be evaluated separately from a variable-frequency speed drive. Current and starting duty, separate control supply and operator-panel options must be checked together during selection.
Technical specifications
Ratings refer to the linked document revision. Confirm the nameplate, motor current and operating conditions for the exact selection.
Technical specifications
| Built-in bypass | A built-in bypass contactor is provided; the brochure says an external bypass contactor is unnecessary for normal use. PDF p. 5 |
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Electrical ratings
| Rated current range | Brochure rated operating-current range: 22–1600 A. PDF p. 6PDF p. 8 |
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| 690 V power range | The 690 V specification table lists 11–1200 kW; this voltage is a separate-order option. PDF p. 4PDF p. 6 |
| Main supply | Supply variants: 220 / 380 / 690 V AC, ±10%. PDF p. 8 |
| Control supply | Control supply L/N: 110–220 V AC or 230–440 V AC; tolerance +10%/−15%. PDF p. 8 |
| Mains frequency | Mains frequency: 45–66 Hz. PDF p. 8 |
Technical specifications
| Overload capacity | Brochure overload values: 150% Ie for 35 s and 200% Ie for 15 s. PDF p. 6 |
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Motor and process control
| Starting functions | Voltage ramp, current-limit start, square-torque start, kick start and jog functions are listed. PDF p. 7 |
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| Acceleration profiles | Adaptive acceleration includes early, constant and late acceleration profiles. PDF p. 4 |
Operation
| Display languages | Chinese/English LCD; other languages are described as custom requests. PDF p. 4 |
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| Event log | Ten timestamped event records. PDF p. 5 |
| Parameter transfer | Parameter upload/download and password locking of changes. PDF p. 4PDF p. 7 |
Technical specifications
| Panel protection | The remote operator panel can reach IP65 with its optional mounting kit; this is not the enclosure rating of the whole starter. PDF p. 5PDF p. 7 |
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| Ground-fault option | Ground-fault protection is explicitly marked optional. PDF p. 7 |
Commissioning and operation
| Control-circuit simulation | The control circuit can be simulated without three-phase power or a load motor. PDF p. 7 |
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Communication and options
| Communications | Factory protocol is Modbus; PROFIBUS is a custom configuration. PDF p. 7 |
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Control inputs and outputs
| Control input ratings | Control inputs: active 24 V DC / 8 mA. PDF p. 8 |
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| Control contacts | Start and jog are listed as normally open; stop and external fault are normally closed. PDF p. 8 |
| Temperature input | Motor temperature can be monitored with an external PT100 sensor. PDF p. 7PDF p. 8 |
| Analogue output | Analogue output is listed as 0–20 mA or 4–20 mA; terminal numbering conflicts with the diagram. PDF p. 8 |
| Auxiliary supply | Auxiliary 24 V DC output is rated 200 mA. PDF p. 8 |
Protection functions
| Protection functions | Phase sequence, undercurrent, frequency, motor overload, instantaneous overcurrent, heatsink temperature, starting timeout, current imbalance and SCR short circuit are monitored. PDF p. 7 |
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Document revision and selection notes
IP65 applies to the optional remote-panel installation, not the whole starter
IP65 applies to the optional remote-panel installation, not the whole starter. A complete verified installation manual and model/current matrix were unavailable; confirm the enclosure nameplate.
PDF p. 5
p4 calls the normal 380 V range 5.5–400 kW; p6 lists 11–800 kW
p4 calls the normal 380 V range 5.5–400 kW; p6 lists 11–800 kW. The first frame drawing says 5.5–55 kW but its table says 11–55 kW.
PDF p. 4PDF p. 6
p8 prose places AO at 11/12 but the diagram at 12/13; bypass relay prose says 22/23/24 while the diagram says 25/26/27
p8 prose places AO at 11/12 but the diagram at 12/13; bypass relay prose says 22/23/24 while the diagram says 25/26/27. Do not publish these terminal numbers as wiring instructions.
PDF p. 8
p8 lists both 10 A resistive and 5 A at 250 V AC without identifying the second load class.
p8 lists both 10 A resistive and 5 A at 250 V AC without identifying the second load class.
PDF p. 8
Important note 5
Conflicting/revision-specific document information; confirm the ordered unit: The 380 V specification table says 11–800 kW; another page gives a different ordering range, so confirm the specific model.
PDF p. 6
Manufacturer drawings
Open connection and dimension drawings in the manufacturer’s original PDF. For installation, use the complete manual matching the exact product model.
PDF p. 6
Technical documents
Information needed for selection
Providing the following information helps our technical team select the correct product and accessories.
- What are the motor nameplate current, supply voltage and load type?
- What are the starts per hour, starting duration and current-limit target?
- Do the control supply and bypass arrangement match the ordered model?
- Are soft stop, a remote panel and a motor-temperature sensor required?
Let us verify your application
For VKS-8000 Bypass Soft Starter selection, share motor, supply, control, environment and duty-cycle data with our engineering team.