The GKGR series mining medium-voltage soft starter cabinet adopts DSP control technology. It monitors current and power factor during startup to adjust output voltage, suppress inrush current and achieve smooth motor acceleration. It effectively reduces grid impact and mechanical stress, extending equipment service life and lowering operation and maintenance costs. Equipped with comprehensive protection including overload, three-phase unbalance, phase loss, undervoltage, starting overcurrent, startup timeout, and zero-sequence protection, it supports both standard cabinet and all-in-one integrated cabinet solutions, ideal for high-power asynchronous and synchronous motors in mining applications.
International-class signal isolation technology is employed between the medium-voltage
main circuit and the control system.
The controller adopts a dual CPU system with pipeline instruction processing, delivering
fast response times and executing core control functions.
Integrated management for parameter setting, text display, and data communication
ensures coordinated, unified, efficient, and reliable operation.
Four control modes provide greater flexibility and easier operation.
Three major start-up modes are available for users to select based on different
operating conditions.
The roof rain shield features a split design from the main body (optional installation),
ensuring compatibility with various installation environments. The grille-type cooling duct
design enables rapid heat dissipation to protect internal components. The cabinet has a high ingress protection (IP) rating.
The LCD high-definition display supports Chinese or English menu interfaces, better aligning with the usage habits of domestic and international users for more convenient operation.
It ensures smooth and stable acceleration to the rated speed, avoiding significant mechanical impact on both the motor and connected load during startup. This extends mechanical service life and maintenance intervals while effectively reducing operational costs.
| Voltage range | 6kV-10kV |
|---|---|
| Current range | 8A-300A |
| Typical power range | 110kW-5000kW |
| Starting current limit | 150%-800% of rated current, adjustable |
| Starting modes | Voltage start / Ramp start / Current-limit start |
| Stop modes | Free stop / Soft stop |
| Protection functions | Phase Loss and Under-voltage Protection / Input Over-voltage Protection / Running Over-current Protection / Thyristor Module Protection / Instant Over-voltage Protection / Start Interval Protection / Start Timeout Protection / Instantaneous Over-current Protection / Interlock Protection |
| Communication interfaces | RS-485 and Profibus interfaces (optional) |
| Operating temperature | -20 to +50 degrees C |
| Altitude | Up to 1500m,(Derating is required for altitude >1500m) |
| Enclosure protection class | IP20 - IP54 (According to customer’s request) |
| Certifications for this specific model | KY / KA |
| Equipment types this model is suitable for | Pumps / Fans / Compressors / Crushers / Mixers / Belt conveyors / Ball mills / Blowers |
|---|---|
| Industries and specific use case for each | - Steel and Metal — starting large rolling mill drive motors - Mining — compressor starts in underground environments - Petrochemical — pump starts on refinery sites |
Yes. The GKGR series offers two cabinet options corresponding to QB‑H and QB‑S specifications: the standard cabinet matches QB‑H, while the all‑in‑one integrated cabinet aligns with QB‑S. The all‑in‑one solution integrates soft starters, circuit breakers and isolation switches to meet compact layout requirements of mining substations.
It features optional split rain shields, grilletype cooling ducts, and a high ingress protection (IP) rating to adapt to high humidity, dust, and vibration in mining sites.
Yes, it offers four control modes and three startup methods, including smooth acceleration and soft stop functions, which effectively suppress water hammer and mechanical impact on highpower mining loads.
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