Correct Model Selection for Your Project
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Verify that this model matches your voltage, current, and load type.
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Unsure which model is suitable? Our engineering team will confirm the correct model before shipment.
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Need custom solutions or a fast project quote? Contact us – we respond within 12 hours.
Contact Us
Email: ann@softstarterpro.com
💬 WhatsApp: +8618006697926
Project & Ordering FAQs
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What info is needed for a project quote?
Motor type, voltage, current/power, application, quantity, environment. -
Can I order a single unit for testing?
Yes, sample orders available for engineering evaluation. -
Do you support custom solutions?
Yes, OEM/ODM and custom control options available. -
Lead time & delivery?
Standard: 3-5 working days. Custom: depends on requirements. -
Technical support & documentation?
Pre-sales and after-sales support, manuals, diagrams, and wiring guidance provided.
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Specification
- Model: RQ900-7.5KW 660V
- Current: 11A
- Voltage: 660V
- Dimension: 272*146*160MM
- Gross Weight: 4KG
Product Description
The Aigoodele LSRQ900 series is a compact high-voltage three-phase motor soft starter engineered for 10HP (7.5kW) AC motors operating on 660V systems. This reliable controller provides essential motor protection and smooth startup performance for smaller high-voltage applications.
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High Voltage Operation: Designed for 660V three-phase systems
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Optimized Current Rating: 11A capacity for 10HP motor applications
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Advanced Communication: RS485 interface for system integration
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Motor Protection: Reduces inrush current and mechanical stress
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Compact Design: Space-saving solution for high-voltage applications
Applications
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Small high-voltage pump systems
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Compact compressor units
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Laboratory and testing equipment
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Specialized industrial machinery
Note
This soft starter is specifically designed for 660V high-voltage applications. Ensure professional installation and correct parameter configuration for safe operation.
Advanced Specifications
| Parameter | Specification |
| Starter Type | Bypass Type |
| Starting Method | Current Limiting / Voltage Ramp / Surge Voltage Ramp |
| Stop Method | Free Stop / Soft Stop |
| Current Limit Range | 50% ~ 600% adjustable |
| Voltage Ramp Time | 1s ~ 120s adjustable |
| Soft Stop Time | 1s ~ 60s adjustable |
| Cooling Method | Natural Cooling |
| Communication | RS485 Modbus RTU |
| Protection Class | IP20 |
| Ambient Temperature | -25°C ~ +40°C |
| Installation | Wall-mounted |
Comprehensive Motor Protection Functions
| Protection | Description |
| Overload | Adjustable grade 0–30, startup & running |
| Over/Under Voltage | Trips at abnormal supply voltage |
| Phase Loss | Input & output phase loss detection |
| Phase Imbalance | Adjustable threshold, auto shutdown |
| Underload | Prevents pump dry-running & cavitation |
| Overtemperature | Internal thermal monitoring |
| SCR Fault | Thyristor breakdown detection |
| Fault Memory | Last 12 fault records stored |
Frequently Asked Questions
Q: What is the difference between bypass type and online type? Which should I choose?
A: Bypass type switches to a bypass contactor after startup, eliminating SCR heat loss — lower energy consumption and easier wiring. Online type keeps the SCR active during running. We recommend bypass type for most applications, especially if you want simpler installation and lower running costs.
Q: How do I select the right soft starter size for my motor?
A: General rule:
- Heavy-duty loads (compressors, conveyors): choose 2 sizes up from motor rating
- Light-duty loads (fans, pumps): choose 1 size up or match motor rating
👉 For detailed selection guidance, refer to our soft-starter-selection-guide
Q: Can a soft starter control motor speed?
A: No. A soft starter only controls startup and stop — it cannot vary speed during running. If you need variable speed control, please choose a VFD (Variable Frequency Drive) instead.
Q: Is it compatible with synchronous motors?
A: No. This soft starter is designed for squirrel cage induction motors (asynchronous) only. It is not compatible with synchronous motors or wound rotor (slip ring) motors.
📄 Download Manual LSRQ900 Series Soft Starter Manual
